Showing papers on "Sodium sulfite published in 1983"

Transparent soap composition

Abstract: A transparent soap composition, consisting essentially of (a) over 50% by weight of a complex mixture of the sodium and triethanolamine salts of a fatty acid or acids having from 6 to 18 carbon atoms and an iodine value of 8-15, (b) between 0.2 and 1.0 weight percent of a member or members selected from the group consisting of citric acid, sodium citrate and potassium citrate, (c) between 0.2 and 0.1 weight percent of a member or members selected from the group consisting of sodium metabisulfite, sodium sulfite, sodium bisulfite, potassium bisulfite, sodium hydrosulfite, potassium hydrosulfite and potassium sulfite, and potassium metabisulfite, (d) water.

Sodium-limestone double alkali flue gas desulfurization method

Abstract: A flue gas desulfurization method for efficiently removing sulfur oxides from a gas stream with an aqueous sodium sulfite- and sodium bisulfite-containing absorption solution, in which absorber effluent solution at a pH of from 5.8 to 6.6 and having an active sodium concentration of from 0.5 M to 0.9 M is regenerated with sufficient ground limestone to yield a treated solution with a higher pH of from 6.3 to 7.0 and whose bisulfite concentration is reduced by from 35 to 70%.

Limitations of Cold Sodium Sulfite Titration Methods for Free Formaldehyde in Textiles

Abstract: One of the more important analytical methods for formaldehyde in a finished textile is the cold sodium sulfite analysis for free or unbound formaldehyde. Because this formaldehyde assay can represent the equilibrium formaldehyde in a finish or reagent and therefore that formaldehyde available for consumer exposure, values obtained should be free of bias. Interferences and limitations of cold sodium sulfite analyses for formaldehyde are detailed and techniques to surmount the limitations are presented.

Molten lithium sulfate-sodium sulfate-potassium sulfate eutectic: reactions of some sulfur compounds

Abstract: Etude des reactions du sulfure et de Na 2 SO 3 , Na 2 S 2 O 5 , Na 2 S 2 O 3 et K 2 S 2 O 7 . Les produits contenant du soufre sont: soufre elementaire et sulfate

Hypochlorite destruction using urea

Abstract: A process for destroying waste alkali metal hypochlorite such as sodium hypochlorite is disclosed. The process involves reacting 50-90% and preferably 70-90% of the alkali metal hypochlorite with urea at from 20°-60° C. and pH 6-8 with pH 7-8 being preferred. The remaining alkali metal hypochlorite can be destroyed with a reactant such as sulfur dioxide, sodium sulfite, or sodium thiosulfate.

Control of brown stain in eastern white pine with reducing agents

Abstract: L'immersion de bois de Pinus strobus fraichement scie dans des solutions aqueuses reductrices avant stockage permet d'eviter la formation de taches brunes en cas de stockage dans des conditions chaudes et humides suivi d'un sechage a l'etude. Les meilleurs resultats sont obtenus avec des solutions de thiosulfate ou de sulfite de sodium a 5%

Bloodless evaluation of blood oxygenators.

Abstract: Evaluation of blood oxygenators using whole blood is inconvenient and expensive, although it is the ultimate preclinical test. Sodium sulfite solutions have advantages over blood for studying oxygen uptake: They are inexpensive, fewer variables need control, and deoxygenation is unnecessary. Assays and interpretation of results are easy. The kinetics of sulfite oxidation must be fast and the concentration of sulfite must be low to emulate oxygen uptake by blood. The kinetics were studied yielding a first order rate constant in sulfite, zero order in oxygen, of 740/min. Limitations of the technique were evaluated using the experimental rate constant and an adaptation of Lightfoot’s approximation. While the reaction of hemoglobin is reversible and essentially instantaneous, that for sulfite is irreversible and finite. Thus if the approach to saturation is not monotonic or if the mass transfer resistance is significantly lowered, e.g., when blood film thicknesses are thinner than a few hundred microns, deviations may occur. Two TMO oxygenators and several prototypes were tested, with both sulfite and bovine blood. Uptakes of oxygen were comparable and the effect of parameter variations were similar. The use of sulfite for early evaluation of oxygenators is concluded to be very useful.

Foamable bath agent

Abstract: PURPOSE:A foamable bath agent, containing a mixed treated material of a carbonate with a sulfate and further an organic acid, and capable of generating bubbles of gaseous carbon dioxide in use to promote the hot spring effect. CONSTITUTION:A foamable bath agent containing an organic acid and 10-80% mixed treated material of a carbonate with a sulfate. Sodium carbonate, sodium hydrogencarbonate, sodium sesquicarbonate, or an anhydride thereof may be cited as the carbonate, and sodium sulfate, potassium sulfate, sodium hydrogensulfate, sodium sulfite or an anhydride thereof may be cited as the sulfate. The mixing weight ratio between the carbonate and the sulfate is (10/90)- (80/20), and the resultant mixture is added to water, dried under heating to give a double salt and incorporated into the bath. Succinic acid, citric acid malic acid or tartaric acid, may be preferred for the organic acid. The bath agent has improved storage stability and has a sufficient foaming property in the hot water of the bath.

The change in leaf protease and protease inhibitor activities after supplying various chemicals

Abstract: Protease activity inSpinacia oleracea leaves, but not roots, increased when sodium sulfite, hydrogen peroxide and sodium azide, but not sulfuric acid, were injected through the petiole under light conditions. On the other hand, protease inhibitory activity in both the leaves and roots decreased by the injection.

Reactions of 1,2‐benzenedisulfinic anhydride

Abstract: Reactions avec la morpholine (obtention du morpholide de l'acide benzenedisulfinique-1,2), l'hydrazine (obtention du tetraoxyde de dibenzo [3,4:7,8] tetrathiocinne-1,2,5,6 et de l'acide dithio-2,2' bis-benzenesulfinique), des alcanols (obtention de monoesters d'alkyle de l'acide benzenedisulfinique-1,2) et le sulfite de sodium; pyrolyse en acide dithio-2,2' bis-benzenesulfonique

Degradation of (+)-Cyanidanol-3 by Sodium Sulfite in Aqueous Solution

Abstract: The reaction of (+)-cyanidanol-3 with sodium sulfite in aqueous solution was investigated. (+)-Cyanidanol-3 was degraded by sodium sulfite in aqueous solution to afford a water-soluble degradation product, which was assumed to be (+)-cyanidanol-3 carrying the sodium sulfonate function in place of the aliphatic hydroxy group at the C-3 position. Further, it was found that the rate of degradation of (+)-cyanidanol-3 by sodium sulfite was approximately the same as that of epicatechin, that the rate was proportional to the concentration of sodium sulfite and to the sum of the concentrations of (+)-cyanidanol-3 and sodium sulfite, and that (+)-cyanidanol-3 or epicatechin was degraded more rapidly by sodium sulfite as the pH was increased. The activation energy of the degradation was calculated to be 28 kcal/mol at pH 8.0 from Arrhenius plots.

Underground backfill for magnesium anodes

Abstract: A mixture of CaSO 3 and bentonite, where the bentonite contains a substantial amount of alkaline earth metal bentonite, e.g., Ca-bentonite, is useful as a backfill composition for underground magnesium galvanic anodes. The backfill may optionally, and beneficially, contain at least one compound selected from sodium sulfite, boric acid, sodium alkylates or sodium-dialk y ldithiocarbamates.

Two-stage chemical treatment of mechanical wood pulp

Abstract: A two-stage chemical treatment process is disclosed for increasing the density, strength and brightness properties of mechanical wood pulp. The method comprises the steps of: applying an aqueous solution of sodium sulfite in the range of about 1 %-10% sodium sulfite based on bone dry weight of wood to wood particles, the solution having a pH in the range of about 4.5-11; heating the sodium sulfite treated wood particles to a temperature in the range of about 100°-160°C and maintaining the particles in the temperature range for a period of time in the range of about 20 seconds to 10 minutes; refining the heated sodium sulfite treated wood particles into mechanical wood pulp; separating the pulp into a reject fraction and an accept fraction, the reject fraction containing a higher proportion of shives and long fiber material; applying an aqueous solution of sodium sulfite, in the range of about 4%-50% sodium sulfite based on bone dry weight of wood, to the reject fraction, the solution having a pH in the range of about 4.5-11; cooking the sodium sulfite treated reject fraction at a temperature in the range of about 100°-160°C for a period of time in the range of about 2-120 minutes; refining the cooked sodium sulfite treated reject fraction; and re-combining at least part of the refined reject fraction with at least part of the accept fraction.

Sulfonate of acetylene/conjugated diene copolymer

Abstract: PURPOSE:A sulfonate of an acetylene/conjugated diene copolymer useful as an anionic surfactant, prepared by reacting an acetylene/conjugated diene copolymer with an acid sulfite and a metabisulfite or a sulfite. CONSTITUTION:Acetylene is copolymerized with a conjugated diene compound of formulaI, wherein R1 and R2 are each H or a halogen or a 1-6C hydrocarbyl (e.g., butadiene, isoprene) to form an acetylene/conjugated diene copolymer, MW 200-10,000, containing diallylic methylene groups of formula II in the main chain. Then, this copolymer is reacted with an acidic sulfite (e.g., acidic sodium sulfite), a metabisulfite, a sulfite or a mixture thereof at a temperature of about 30-200 deg.C in a solvent such as an alcohol or an ether to form the purpose sulfonate of acetylene/conjugated diene copolymer.

Production of cationic high-molecular substance

Abstract: PURPOSE:To produce the titled substance useful as a paper additive, by reacting an acrylamide polymer with a hypochlorite in an alkaline range and adding a water-soluble amine/epichlohydrin polycondensate in the course of the reaction. CONSTITUTION:An aqueous solution of sodium hypochlorite and caustic soda is added with stirring to an aqueous solution of an acrylamide polymer and reacted at about -5-40 deg.C (so-called Hofmann reaction). Then, before the chlorine in the reaction system decreases to 1mol%, based on the carbamoyl groups of the acrylamide polymer, at least about 1wt%, based on the crylamide polymer, amine/epichlorohydrin resin is added to effect a reaction. After the reaction system has attained a desired viscosity, a reducing agent such as sodium sulfite is added to stop the crosslinking reaction. The aqueous cationic polymer solution obtained can be stably stored by adjusting its pH to about 3.5-5.5.

Local disorder inhibitor

Abstract: PURPOSE: A local disorder inhibitor that contains, as active ingredients, sulfite hydrogen salt and sulfite salt, thus enabling the administration of a benzodiazepine which is used as a carcinostatic agent, but causes local disorders CONSTITUTION: The objective inhibitor is obtained by using at least one selected from hydrogen sulfite salts and sulfite salts As the hydrogen sulfite and sulfite salt, an alkali metal salt is preferred Sodium hydrogen sulfite and sodium sulfite are particularly preferred When the inhibitor is injected subcutaneously or peritoneally together with a compound causing local disorder such as inflammation, eg, a benzodiazepine, the local disorder is inhibited The titled drug is preferably used together with a drug causing local disorders and administrated parenterally COPYRIGHT: (C)1984,JPO&Japio

Agent for intravenous drip containing dapamine

Abstract: PURPOSE:An agent for intravenous drip containing dapamine having further raised stabilizing effect caused by a sulfite, obtained by adding a sulfite and a cysteine as stabilizers in specific amounts respectively to a solution containing a specific amount of dapamine useful as an improver for acute circulatory incompetence. CONSTITUTION:A solution containing 0.1-10.0mg/ml depamine is mixed with 0.05-1.0mg/ml, preferably 0.1-0.5mg/ml sulfite, preferably sodium sulfite, potassium sulfite, sodium hydrogensulfite, or potassium hydrogensulfite and 0.05- 1.0mg/ml, preferably 0.1-0.5mg/ml cysteine, preferably L-cysteine, DL-cysteine, N-acetylcysteine, or their hydrochlororides as stabilizers, so that an agent for intravenous drip with a large volume is stabilized. The agent for intravenous drip has improved stabilizing effect at 3.0-6.0pH, especially 3.5-5.0pH. Its volume is 50-1,000ml, preferably 200-500ml.

Eye drop preparation

Abstract: PURPOSE:An eye drop preparation that is made by filling a polyester tube with an eye drop solution containing ascorbic acid, sodium sulfite and phosphates as essential ingredients, thus containing ascorbic acid stably and showing effectiveness for eye strain, conjunctivities and keratitis. CONSTITUTION:An eye drop solution containing (A) ascorbic acid, (B) sodium sulfite and (C) phosphates such as primary-secondary phosphates, especially their alkali metal as essential ingredients, preferably by 0.5-10, especially 1- 3wt% A; an amount of B 0.1-10, preferably 0.2-0.2 times the weight of component, A, and such an amount of C as making the pH of the eye drop solution 5-8, preferably 6.0-7.5 is prepared by the usual method other then the above composition. Then, the resultant solution is filled in polyester tubes to produce eyedrop preparations preventing decomposition of ascrobic acid and discoloration of the solution.

Preparation of partial alkali metal salt of 1-aminonaphthalene-3,6,8-trisulfonic acid

Abstract: PURPOSE:To prepare the titled compound useful as a raw material for the preparation of an intermediate of dye, in high yield, by nitrating naphthalenetrisulfonic acid with nitric acid, and reducing the nitrated mixture with iron under acidic conditions in the presence of inorganic sulfur-containing compound or sulfur. CONSTITUTION:Naphthalenetrisulfonic acid is nitrated with nitric acid, and the nitrated mixture is reduced with iron under acidic conditions to obtain partial alkali metal salt of 1-aminonaphthalene-3,6,8-trisulfonic acid (Koch's acid). The reduction is carried out in the presence of an organic sulfur-containing compound such as sodium sulfite, potassium sulfite, sulfur dioxide gas, sodium bisulfate, etc. or sulfur, at <=3pH, preferably <=2pH. The yield of Koch's acid in the acidic reduction can be improved by the addition of the sulfur compound, and the present process promotes the H-acid (dye intermediate) preparation process including an acidic reduction process, and gives industrial advantage.

Preparation of 1,4-diamino-2,3-dicyanoanthraquinone

Abstract: PURPOSE:To prepare the titled compound economically in an industrial scale, by reacting 1,4-diamino-2,3-dihalogenoanthraquinone with a sulfonating agent in an aqueous medium in the presence of a quaternary ammonium compound, and reacting the product with a cyanizing agent without separating from the reaction system. CONSTITUTION:1,4-Diamino-2,3-dihalogenoanthraquinone is made to react with a sulfonating agent such as sodium sulfite in an aqueous medium in the presence or absence of an inert organic solvent, in the presence of a quaternary ammonium compound of formula I (R1 and R2 are 1-24C alkyl, etc.; R3 and R4 are 1-10C alkyl; X is anion residue) or formula II (R5 is 1-24C alkyl; R6 is H or methyl) and/or a quaternary phosphonium compound of formula III (R7- R10 are 1-24C alkyl, etc.) to obtain 1,4-diaminoanthraquinone-2,3-disulfonic acid or its salt. Without separating the product from the reaction system, the compound is made to react with a cyanizing agent such as sodium cyanide to obtain the objective compound.