Showing papers on "Sodium silicate published in 1970"

Soil adhesion composition of acrylic latex and sodium silicate

Abstract: A METHOD FOR FORMING A RELATIVELY THICK SEMI-IMPERVIOUS CRUST ON SOIL TO INHIBIT EROSION THEREOF COMPRISING THE STEPS OF APPLYING AN AQUEOUS COMPOSITION TO SOIL SURFACE AND ALLOWING THE COMPOSITION TO CURE IN THE TREATED SOIL SURFACE. THE AQUEOUS COMPOSITION CONTAINS AN AQUEOUS 100% ACRYLIC LATEX EMULSION AND SODIUM SILICATE.

Preparation of high-silica faujasite

Abstract: Faujasite having a silica to alumina molar ratio greater than 4 is prepared by forming a reaction mixture having specified proportions of Na2O, Al2O3, SiO2 and H2O using as reactants solutions of sodium silicate, sodium aluminate, and an aluminum salt to provide a proportion of the alumina, and crystallizing the reaction mixture in the presence of nucleation centers (zeolitic seeds) Suitable aluminum salts are aluminum sulfate, chloride, and nitrate

Built detergent composition

Abstract: This invention relates to a built detergent composition consisting essentially of an organic surface-active agent selected from the group consisting of anionic; nonionic; zwitterionic; and ampholytic detergents; and mixtures thereof; an inorganic precipitating builder selected from a water-soluble aluminate, silicate, carbonate and mixtures thereof, and a precipitation modifier characterized by 1. ITS ABILITY TO PREVENT THE FORMATION OF A PRECIPITATE VISIBLE TO THE UNAIDED EYE FOR 5 MINUTES; AND 2. ITS ABILITY TO PREVENT THE VISIBLE PRECIPITATE FORMED FROM SETTLING OUT OF SOLUTION FOR 20 MINUTES WHEN THE PRECIPITATION MODIFIER IS PRESENT AT A FINAL CONCENTRATION OF 0.01% BY WEIGHT UNDER THE FOLLOWING CONDITIONS: A. A SOLUTION PH of 10, a solution temperature of 125*F. and the solution having the following composition at the start of the test; 14 GRAINS PER GALLON OF HARDNESS IONS AT A 3:1 MOLAR RATIO CALCIUM TO MAGNESIUM, 0.05% BY WEIGHT PRECIPITATING BUILDER, 1:1 WEIGHT RATIO SODIUM CARBONATE TO SILICATE, THE SODIUM SILICATE HAVING A SiO2:Na2O ratio of 2.0, and 0.025% by weight surfactant, 1:1 ratio of sodium dodecylbenzene sulfonate to sodium tallow triethoxysulfate; WHEREBY THE WEIGHT RATIO OF SAID BUILDER TO SAID MODIFIER IS IN THE RANGE FROM 1000:1 TO 1:1, AND THE WEIGHT RATIO OF SAID ORGANIC SURFACE-ACTIVE AGENT TO SAID BUILDER IS IN THE RANGE FROM 20:1 TO 1:20. In a preferred embodiment, the essential organic surface-active agents have a solubility in water of at least 0.05% at about 80*F. to about 200*F.; they have efficient soil-removing and soil-dispersing properties in water in an amount of about 0.05%; and they are resistant to precipitation by hard water mineral ions.

Preparation of high silica synthetic faujasite

Abstract: HIGH SILICA CRYSTALLINE ALUMINOSILICATES ARE PREPARED BY FORMING AS AQUEOUS REACTION MIXTURE WITH SOURCES OF SODIUM HYDROXIDE, SILICA, ALUMINA, AND NUCLEATION CENTERS (SEEDS), A PORTION OF THE EXCESS SODIUM HYDROXIDE BEING NEUTRALIZED BY THE ADDITION OF A STRONG MINERAL ACID OR AMMONIUM SULFATE, AND CRYSTALLIZING THE REACTION MIXTURE AT AN ELEVATED TEMPERATURE. SODIUM SILICATE SOLUTION CAN BE USED AS THE SILICA OUNCE. PARTICAL NEUTRALIZATION OF THE SODIUM SILICATE SOLUTION WITH A STRONG MINERAL ACID SUCH AS SULFURIC ACID PREVENTS EXCESS SOLUBILAZATON OF THE SILICA AND THEREBY INCREASES THE SILICA TO ALUMINA RATIO IN THE FINAL PRODUCT.

Zeolitic catalyst and preparation

Abstract: Preformed coherent microspheres obtained by calcining a spray dried slurry of hydrated kaolin clay at elevated temperature (e.g., 1800 DEG F.) are suspended in an aqueous sodium hydroxide solution together with a small amount of finely divided metakaolin (e.g., kaolin clay calcined at 1350 DEG F.). The suspension is aged and then heated until crystalline sodium faujasite appears in the microspheres and a sodium silicate mother liquor is formed. The crystallized microspheres are ion-exchanged to produce a fluid zeolitic cracking catalyst.

Selective plugging method

Abstract: The more permeable channels in an oil producing formation are selectively plugged by the reaction in the formation of sodium silicate and a divalent cation-containing brine present in the formation. The sodium silicate reactant is separated from the formation brine by an inert spacing medium so that the precipitate is formed at a desired distance from the injection wellbore. The reactants may be caused to contact each other over a larger region of the formation by decreasing the amount of spacing medium employed during the introduction of the treating solutions.

Process for making silicate foams from alkali metal silicates

Abstract: A PROCESS FOR ECONOMICALLY FORMING MICRO CELLULAR, INORGANIC SILICATE FOAMS FOR USE IN BUILDING CONSTRUCTION AND HAVING GOOD STRUCTURAL, THERMAL AND SOUND INSULATION PROPERTIES. THE PROCESS FOR FORMING SUCH FOAMS COMPRISES THE STEPS OF HYDRATING FINELY DIVIDED PARTICULATE SILICATES WITH WATER AND EXPANDING THE MASS BY INPUT OF THERMAL ENERGY. THE THERMAL ENERGY CAN BE PROVIDED BY A CONVENTIONAL HEAT SOURCE, BY A MICROWAVE ENERGY SOURCE OF BY DISSIPATION OF MECHANICAL ENERGY IN THE MATERIAL. THE SILICATE MAY BE SODIUM SILICATE AND THE SODIUM SILICATE MAY HAVE A RATIO OF SIO2 TO NA2O OF 1:1 TO 5:1 (OR MORE). THE HYDRATED MATERIAL MAY FURTHER COMPRISES OTHER ALKALI METAL SILICATES. IT MAY FURTHER CONTAIN COMPLEXING AGENTS TO INSOLUBILIZE THE RESULTING FOAM, AND OTHER ADDITIVES TO IMPART DESIRABLE PHYSICAL OR CHEMICAL CHARACTERISTICS. THIS METHOD CAN YIELD WATER RESISTANT OR INSOLUBLE SILICATE FOAMS OF MICROCELLULAR CLOSED CELL STRUCTURE, 2 TO 8 P.C.F. DENSITY, HIGH STRENGTH-TO-DENSITY RATIO, AND LOW THERMAL CONDUCTIVITY.

Method for insolubilizing sodium silicate foam

Abstract: Insoluble silicate foams which exhibit good permanence and weather resistance for use in structural applications may be produced by foaming a dry reaction mixture of hydrated silicate and complexing agent which has been prepared by mixing particulate alkali metal or alkaline earth metal silicate and the complexing agent and treating tat mixture with saturated steam at the hydration temperature of the silicate, thereby achieving uniform distribution and penetration of the reactants.

Forming a barrier between zones in waterflooding

Abstract: In a waterflooding process for oil recovery from oil-bearing earth formations, a high-permeability zone is isolated from a low-permeability zone at the injection well. A water solution of sodium silicate is injected into one zone, a water solution of an activator - a chemical such as ammonium sulfate which causes sodium silicate solution to gel - being injected into the other zone. Preferably, the two solutions are injected simultaneously, the rates of injection being proportional to the pore volumes of the two zones to keep the solution fronts together. Fracturing pressures are avoided.

Steam chamber coatings

Abstract: A coating composition containing sodium silicate and hydrated alumina is deposited on a surface of the flash evaporation chamber in a steam ironing device. The coating is heated, most conveniently by application to an already heated surface and preferably heated to at least about 375 DEG F, to convert it to a more insoluble form.

Well drilling method

Abstract: A well drilling fluid comprises a solution having dissolved therein a relatively small quantity of potassium silicate or, for some applications, sodium silicate or a mixture of sodium silicate and potassium chloride. The body of the fluid may be water or a presently available mud or other drilling fluid with which the silicate is compatible. The fluid on reaching shale sections along the well bore acts to stabilize the shale and prevent its swelling, dispersing or sloughing.

Preparation of finely divided calcium silicate

Abstract: A new type of finely divided calcium silicate has been produced by reacting calcium sulfate with sodium silicate an amounts to form theoretically a composition containing from about 07 to about 40 moles of SiO2 for each mole of CaO The by-product sodium sulfate is removed from the calcium silicate by washing

Platelet silica,its production and uses

Abstract: MICROPOROUS PLATLET SILICA IS PREPARED FROM THE AMMONIUM FORM OF SODIUM SILICATE (I) BY FREEZE-DRYING AND FILTRATION OR (II) BY FREEZING AND THAWING AND FILTRATION, OR (III) BY LOWERING THE PH AND REPEATING (II). THE RESULTANT UNITARY, POLYMERIC, MICROPOROUS SILICA PLATELETS CAN BE USED AS FILLERS IN HIGH GLOSS FILMS.

Thermal insulation materials and methods of making same

Abstract: A strong light weight insulation material having a calcium silicate binder and which inhibits corrosion of stainless steel. The insulation material is substantially devoid of the usual soluble chloride impurities, and includes from 1 to approximately 15 percent of sodium or potassium silicate, and preferably has no more than 1000 parts of chloride ion in 1 million parts of the insulation material. The disclosure also teaches a method of forming the insulation wherein a slurry substantially devoid of soluble silicates is molded into a desired shape. A solution of sodium silicate is then filtered through the shape following which formation of the calcium silicate binder is completed.

Corrosion-inhibiting thermal insulation for stainless steel

Abstract: Molded thermal insulation material for use in contact with austenitic stainless steel chemical-processing equipment, to inhibit stress corrosion cracking thereof, consists of at least 60 percent by weight of cellular expanded perlite, bonded by a dried, inorganic, water soluble binder. The binder consists of a major proportion of a mixture of sodium silicate and potassium silicate and a minor proportion of sodium hexametaphosphate, and the molecular ratio of the silica to the alkaline oxide is at least 3.6 to 1.0. The potassium silicate consists of at least about 40 percent, by dry weight, of the total silicate in the dried binder, and the total binder constitutes at least about 20 percent, by weight, of the total insulation composition. In the manufacture of the molded insulation, the mixture of perlite and the binder, in slightly damp condition, is placed in the mold cavity and subjected to light molding pressure, sufficient to compact the material into the exact configuration of the mold cavity without expelling water from the mixture. The molded insulation is removed from the mold and oven dried at a temperature of about 250* F.

Improvements in or relating to the manufacture of foundry cores and moulds

Abstract: 1283301 Foundry moulds A M LIASS and PABORSOOK 3 July 1970 32360/70 Addition to 1085651 Heading C3N Foundry moulds and cores are produced from a mixture of granular refractory material and a self-hardening binder comprising sodium silicate with a proportion of SiO 2 to Na 2 O ranging from 1A5 up to, but not including 2A5 and as a hardening material cement, said mixture further incorporating water and a foaming agent, the amount of water being such that foaming of the aqueous phase converts the mixture to a fluid condition, the mixture being poured to form the core or mould whilst in the fluid condition. The foaming agent may be used in an amount 0A05- 0A3% by weight of dry ingredients and is preferably an anionic surfactant such as an alkylaryl sulphonate, alkyl sulphonate or a primary or secondary alkyl sulphate but cationic and non-ionic surfactants may be used. The filler may be quartz sand, whilst the amount of cement added is preferably 2-5% by weight, and the content of an aqueous solution of sodium silicate preferably varies from 5-7% by weight of the dry ingredients. An alkali metal phosphate, such as a mono-substituted, di-substituted or tri-substituted phosphate of potassium or sodium, preferably in an amount 0A05-0A35% by weight of dry ingredients. The invention also provides, as a modification of parent Specification, the addition of such an alkali metal phosphate to foundry mould compositions containing sodium silicate with a higher molar ratio of SiO 2 to Na 2 O, say up to 3A0 to 1.

Flame-proof and no-smoke-producing plate for architectural use

Abstract: A flame-proof and no-smoke-producing wooden plate for architectural use comprising a wooden base plate, a layer of a water-proof composition formed on said wooden plate, a layer of a water-soluble silicate selected from the group consisting of sodium silicate or potassium silicate formed on said layer of said water-proof composition, and an additional layer of a water-proof composition formed on said water-soluble silicate layer. Each of said water-proof compositions is formed by adding to a water-soluble silicate selected from the group consisting of sodium silicate and potassium silicate a dicalcium silicate material which combines with a water-soluble silicate to produce a self-setting mixture.

Process for producing crystalline zeolite a

Abstract: A PROCESS FOR PREPARING SODIUM ZEOLITE A WHICH COMPRISES PREPARING AN AQUEOUS SODIUM-ALUMIN-SILICATE REACTANT MIXTURE CONSISTING ESSENTIALLY OF (1) OXIDES OF SILICON, ALUMINUM AND SODIUM AND (2) WATER, IN THE PROPORTION, EXPRESSED IN TERMS OF OXIDE MOL RATIOS, FALLING WITHIN THE FOLLOWING RANGES: RANGE 1 RANGE 2 RANGE 3 RANGE 4 NA2O/SIO2 0.4-0.7 0.4-0.7 0.7-1 1-4 SIO2/AL2O31-2 1-2.5 1-2.5 1-2.5 H2O/NA2O 40-100 120-300 220-300 210-300 WHEREIN THE MAJOR SOURCE OF SILICA IN THE REACTANT MIXTURE IS ALLOPHANE, MAINTAINING THE REACTANT MIXTURE AT A TEMPERATURE WITHIN THE RANGE OF 40* C. TO 180* C. FOR A SUFFICIENT PERIOD TO CRYSTALLIZE SODIUM ZEOLITE A, AND SEPARATING THE CRYSTALS FROM THE MOTHER LIQUOR. A PROCESS FOR PREPARING SODIUM ZEOLITE A WHICH COM PRISES PREPARING AN AQUEOUS SODIUM-ALUMINO-SILCATE REACTANT MIXTURE CONSISTING ESSENTIALLY OF (1) OXIDES OF SILICON, ALUMINUM AND SODIUM AND (2) WATER, IN THE PROPORTION, EXPRESSED IN TERMS OF OXIDE MOL RATIOS, FALLING WITHIN THE FOLLOWING RANGES; RANGE 1 RANGE 2 RANGE 3 NA2O/SIO2 0.4-0.7 0.7-1 1-4 SIO2/AL2O3 1-2.5 1-2.5 1-2.5 H2O/NA2O 120-300 220-300 210-300 WHEREIN THE MAJOR SOURCE OF SILICA IN THE REACTANT MIXTURE IS SOLUBLE SODIUM SILICATE, MAINTAINING THE REACTANT MIXTURE AT A TEMPERATURE WITHIN THE RANGE OF 40* C. TO 180* C, FOR A SUFFICIENT PERIOD TO CRYSTALLIZE SODIUM ZEOLITE A, AND SEPARATING THE CRYSTALS FROM THE MOTHER LIQUOR.

Nitrile hydrogenation catalyst

Abstract: A HYDROGENATION CATALYST OF HIGH ACTIVITY, GOOD CRUSH STRENGTH AND STRONG RESISTANCE TO DISINTEGRATION WHEN EMPLOYED IN A FIXED-BED HYDROGENATION PROCESS COMPRISING A HYDROGEN-REDUCED MIXTURE OF SODIUM SILICATE AND COBALT OXIDE IN A WEIGHT RATIO OF SODIUM SILICATE:COBALT OXIDE OF ABOUT 1:1 TO 1:9.

Method for making a mold using manganese carbonate

Abstract: A method of making a mold or the like comprising the steps of mixing an alkali silicate as a binder with molding sand and adding manganese carbonate to the mixture of molding sand and alkali silicate as a self-hardener, and forming the mixture into a mold. Additionally, the mixture may be fluidized by adding a surface-active agent and also water may be added to assist in the fluidizing operation. A composition of material for forming a mold is comprised of a mixture of molding sand, such as silica sand, olivine sand, zircon sand, and the like, an alkali silicate, such as sodium silicate, used as a binder, and powdered manganese carbonate is employed as a self-hardener. If a fluidized mixture is desired a surface-active agent, such as sodium salt of N-lauryl amino propionic acid and water may be added to the sand mixture.

Improvements in or relating to the Damp-Proofing of Walls and Similar Structures.

Abstract: 1,177,662. Damp-proofing solution. GALLWEY CHEMICAL CO. Ltd. 19 June, 1968 [7 July, 1967], No. 31428/67. Heading C3T. [Also in Division D1] An aqueous damp-proofing solution contains by volume 16 7% of sodium silicate solution containing 30 wt. per cent 5i0 2 and 12-5% of a commercial siliconate containing 40 wt. per cent solids; a second solution contains 16% and 15% respectively of these solutions; acetic acid may be added to reduce gelling time; a plastics emulsion, e.g. of a styrene/acrylic copolymer may also be added.

Spray dried detergents containing sodium-potassium double silicate

Abstract: A method has been found for increasing the silicate content in spray dried detergents without decreasing the spray dryer throughput. The method involves the preparation of detergent slurries with high solids content by adding alkali metal silicates to the slurries in the form of sodium-potassium double silicate glass. Thus, the amount of water that must be removed in the drying tower is reduced and/or the silicate content can be increased when compared with slurries prepared with sodium silicate solutions.

Highly siliceous solid sodium silicate

Abstract: A PROCESS IS DESCRIBED FOR PREPARING A SOLID SODIUM SILICATE HAVING A SIO2:NA2O WEIGHT RATIO FROM ABOUT 4.0:1-5.3:1 BY THE DIRECT REACTION OF A MIXTURE OF 40-60 PERCENT WATER, A SOLUBLE SODIUM SILICATE HAVING A RATIO OF LESS THAN 4.0:1 AND AN AMORPHOUS FINELY-DIVIDED SILICA, THE AMOUNT OF SILICA BEING SUFFICIENT TO YIELD, IN COMBINATION WITH THE SODIUM SILICATE, THE DESIRED FINAL WEIGHT RATIO. REACTION TAKES PLACE AT A TEMPERATURE LESS THAN THAT AT WHICH INTUMESCENCE OCCURS. THE WATER-SOLUBLE, HIGH WATER CONTENT, SOLID PRODUCT SO OBTAINED IS ALSO DESCRIBED.

Production of polysilicic acid by ion exchange

Abstract: THE INVENTION PROVIDES A PROCESS OF CONVERTING AN ALKALI METAL SILICATE, SUCH AS SODIUM SILICATE, TO POLYSILICIC ACID BY THE USE OF A CATION EXCHANGE RESIN BED. DEGRADATION OF THE RESIN AND CLOGGING OF THE BED BY SILICA GEL ARE AVOIDED BY THE COMBINED USE OF A MACRORETICULAR RESIN; THE USE OF A FOLLOWER RINSE OF DILUTE SODIUM HYDROXIDE; AND SUBSEQUENT WATER RINSES IN BOTH FORWARD AND REVERSE DIRECTIONS; FOLLOWED BY ACID REGENERATION; FOLLOWED BY WATER RINSES IN THE FORWARD AND REVERSE DIRECTIONS. THIS COMBINATION OF FEATURES ENABLES THE USE OF RELATIVELY CONCENTRATED SILICATE SOLUTIONS, AND RECYCLING FOR THOUSANDS OF CYCLES USING THE SAME RESIN BED. A PREFERRED RESIN IS A MACRORETICULAR SULFONATED CO-POLYMER OF STYRENE AND DI-VINYLBENZENE; A PREFERRED ALKALI METAL SILICATE IS SODIUM SILICATE HAVING A SIO2:NA2O RATIO OF 3.75:1; AND, PREFERRED REGENERATING ACIDS ARE SULFURIC AND HYDROCHORIC.

Process of coating metal flakes with calcium silicate

Abstract: Metal flakes, especially copper-based metal flakes of about 20 to 400 mesh or less, are rendered tarnish-resistant by a uniform coating of sodium silicate and/or a polyvalent metal silicate, such as calcium silicate. A sodium silicate coating is provided by boiling a mixture of flake, water and sodium silicate solution to degrease the flake, adding an organic carrier and a surfactant to form an emulsion of sodium silicate solution in the carrier having the flake suspended in the emulsion, evaporating off the water to form a paste, adding an organic solvent to form a suspension of paste in the solvent, adding dilute aqueous solution, such as sodium hydroxide or sodium carbonate to precipitate the coated metal flakes, decanting the liquid and drying the coated flakes. The flakes are desirably treated with an aqueous solution of a polyvalent metal salt, such as calcium acetate prior to drying. Alternatively, the initial degreasing step can be conducted with aqueous ammonia as an additional component, which permits a reduction of the amount of sodium silicate. Thereafter, an organic solvent such as toluene and a nonionic emulsifier is added, the aqueous phase is removed, water and sodium silicate solution are added to form a slurry, the organic solvent is distilled off, a surfactant such as alkylated glycene and aqueous calcium chloride are added to the aqueous suspension, the suspension is boiled, and water is removed to yield dry coated flake. The dried flakes may be further treated with additional stabilizing materials, such as vinyl stabilizers or chelating agents.

An Improved Method of Manufacturing a Prefabricated Flue Section.

Abstract: 1,184,550. Heat-insulated pipes. PARK SECTIONAL INSULATING CO. Ltd. 29 Sept., 1967 [8 Dec., 1966], No. 55053/66. Addition to 1,095,872. Heading F2P. [Also in Division F4] In a flue section 10 wherein an outer sleeve 15 surrounds an inner tubular liner 11, the space therebetween is filled with insulation comprising a layer 12 of sodium silicate crystallized into a cellular structure, a sheet of asbestos 13 and a fibrous mat 14 of e.g. mineral or glass wool, both being impregnated with sodium silicate. In forming the flue section 10 sodium silicate is sprayed on to the inner liner 11 and heated causing the sodium silicate to crystallize and form the layer 12. The impregnated asbestos sheet 13 and fibrous mat 14 are applied over the layer 12 together with the outer sleeve 15. The complete section is then heated to cure the sodium silicate. Each flue section has its inner liner projecting beyond the outer sleeve to form a spigot 16 which slots into a socket portion 17 of the adjacent flue section. The inner liner 11 is made from stainless steel, asbestos cement coated with vinyl, or glazed vitrified clay piping.

Improvements in Clays Used for Pottery and Modelling

Abstract: 1,181,266 Clay composition A I LEWIS 18 July, 1968 [29 Sept, 1967; 30 April, 1968], Nos 44522/67 and 20453/68 Heading C3N A clay composition is composed, in wt per cent, of: ball clay, 50-80; silica sand, 5-15; synthetic textile fibre, 0A15-6A0; balance water, 15-35 Based on the hardened composition, 2-10% sodium silicate may be added to harden articles of the composition either by adding as a powder to the clay, or by immersing, coating, or brushing dried articles of the composition with sodium silicate solution Also added may be a colouring agent or powdered fired clay The fibre may be nylon or polyethylene terephthalate Articles of the composition may be fired or left unfired The composition may be modelled about a metal armature or frame and the whole fired Tiles may be formed of the composition

Bleaching and washing composition and process

Abstract: A SOLID BLEACHING MIXTURE OF A PEROXYGEN COMPOUND SUCH AS SODIUM PERBORATE TETRAHYDRATE, SODIUM PERBORATE MONONHYDRATE, OR SODIUM MONOPERSULFATE, AND AN ALKALINITY BOOSTER SUCH AS SODIUM CARBONATE, SODIUM SILICATE OR TRISODIUM PHOSPHATE, EFFECIVELY REMOVES STAINS FROM HOUSEHOLD LAUNDRY WHEN THE MIXTURE IS ADDED TO THE WASH WATER IN AN AMOUNT WHICH PROVIDES BETWEEN ABOUT 50 AND 150 PARTS PER MILLION AVAILABLE OXYGEN AND A PH BETWEEN ABOUT 10 AND 12. WHEN BETWEEN ABOUT 50 AND 500 PARTS PER MILLION OF A SURFACTANT, AND BETWEEN ABOUT 5 AND 25 PARTS PER MILLION OF AN ANTI-DEPOSITION AGENT SUCH AS CARBOXYMETHYL CELLULOSE OR POLYVINYL PYRROLIDONE ARE ADDED TO THE WASH WATER EITHER TOGETHER WITH THE BLEACHING MIXTURE OR SEPARATELY, THE LAUNDERING IS PARTICULARLY EFFECTIVE. A SEQUESTERING AGENT FOR SOFTENING WATER, SUCH AS SODIUM TRIPOLYPHOSPHATE MAY BE INCLUDED.