Showing papers on "Aluminium hydroxide published in 1979"

Aluminum, zinc and copper concentrations in plasma in chronic renal insufficiency.

Abstract: Plasma aluminium, zinc and copper were determined in 68 patients with chronic renal insufficiency and in 20 healthy individuals In the renal insufficiency group 16 patients had received aluminium containing substances particularly phosphate binding drugs (aluminium hydroxide) for a long time We observed that only the patients taking aluminium hydroxide showed elevated aluminium levels in plasma (controls: 086 +/- 027 mumoles/l; renal insufficiency: 305 +/- 163 mumoles/l) In two of these patients with symptoms of "dialysis dementia", plasma aluminium concentrations were markedly increased The zinc concentrations in plasma of patients with renal insufficiency were slightly decreased (controls: 1448 +/- 265 mumoles/l; renal insufficiency: 1177 +/- 235 mumoles/l); the plasma copper concentrations were slightly increased (controls: 173 +/- 283 mumoles/l; renal insufficiency: 2298 +/- 47 mumoles/l) There was a distinct decrease of plasma zinc concentrations in patients with raised aluminium levels The clinical aspects of these changes are discussed

Aluminium sulphate compositions containing polynuclear complexes and a method of producing the same and the use thereof

Abstract: One object of present invention provides an aluminium sulphate composition for use in such processes as the purifying of water, the sizing of paper and the dewatering of plants, which comprises a solution of aluminium sulphate and polynuclear complexes therein of the formula where m and n are positive integers, having a pH of between about 3 and the highest pH, at which precipitation of aluminium hydroxide is substantial avoided and a method of producing the same. A further object of the invention relates to the use of an aluminium sulphate composition comprising a solution of aluminium sulphate and polynuclear complexes therein of the formula where m and n are positive integers, having a pH of between about 3 and the highest pH, at which precipitation of aluminium hydroxide is substantial avoided, in such processes as the purifying of water, the sizing of paper and the dewatering of plants. Another object of the invention provides a process for purifying water, sizing paper, dewatering plants and the like, which process is characterized by using in such a process a

Absorption of Factor VIII by Aluminium Hydroxide

Abstract: The absorption of factor VIII from gel filtration fractions, concentrates and plasma by aluminium hydroxide has been studied. Significant quantities of factor VIII could be removed when the protein concentration was low; the percentage absorbed increased with decreasing initial protein concentration. Factor VIII R:Ag and VIII:C were removed in parallel, but absorption of a high purity concentrate resulted in selective absorption of the lower molecular weight forms of factor VIII. Elution of the absorbed proteins gave a poor yield of VIII R:Ag, with no detectable VIII:C. Absorption of plasma showed no detectable loss of VIII R:Ag, but an apparent decrease of VIII:C of about 10%.

Manufacture of fine titanium dioxide composition powder

Abstract: PURPOSE: To obtain a stable quality of fine titanium dioxide composition powder at low cost by a procedure in which aluminium hydroxide is deposited on the surfaces of noncoagulative titanic acid or titanium dioxide in an aqueous slurry, before or after which the titanic acid or titanium dioxide is baked. CONSTITUTION: In the process (A), an acid aqueous solution of titanium is hydrolyzed to obtain noncoagulative titanic acid, and then in the process (B), the noncoagulative titanic acid or titanium dioxide obtained therefrom is dispersed into water to obtain an aqueous slurry. Then, 0W10wt% (in terms of SiO 2 on the basis of TiO 2 ) a silicone hydroxide and 1W10wt% (in terms of Al 2 O 3 on the basis of TiO 2 ) an aluminium hydroxide are deposited on the surfaces of noncoagulative titanic acid or titanium dioxide particles in the aqueous slurry. In the process (C), before or after the deposition process (B), the noncoagulative titanic acid or titanium dioxide is baked at 700°C or more so that 80% or more of the noncoagulative titanic acid become fine titanium oxide powder of a grain size of 0.02W0.07microns. COPYRIGHT: (C)1980,JPO&Japio

Integrated process for treatment of residual solutions from anodization plants

Abstract: A process and installation for the integrated treatment of concentrated residual solutions resulting from the anodization of aluminium parts is described, in which caustic soda is employed in the pickling process and sulphuric acid in the anodization bath. The process comprises three sets of operations: (1) Production of aluminium sulphate in concentrated solution or in hydrated crystals, by the treatment of part of the residual solution from the anodization. (2) Production of precipitated aluminium hydroxide and a solution of sodium sulphate from residual anodization and pickling solutions. (3) Production of sodium aluminate from residual pickling solutions and aluminium hydroxide producted in (2). (FIG. 1.)

Manufacture of catalyst support

Abstract: PURPOSE:To manufacture a CeO2-containing catalyst having an oxygen storing effect, by a procedure in which activated alumina obtained by quickly dehydrating aluminium hydroxide is mixed with cerium oxide, granulated, cured, and then baked to obtain a three-way catalyst. CONSTITUTION:As a three-way catalyst for cleaning exhaust gas from internal cumbustion engine, an activated alumina of an ignition loss of 5-20%, obtained by quickly dehydrating aluminium hydroxide in a high-temperature gas, is mixed with cerium oxide or cerium hydroxide in an amount of 10-18% (as CeO2 of a purity of 90% or more), granulated, cured in a saturated steam, dried, and then baked at 800-1,100 deg.C. The catalyst thus obtained, containing CeO2 having an oxygen storing effect,can clean NOx, CO, and hydrocarbons effectively and concurrently.

Further studies on the adjuvant effect of silica on IgE antibody production in mice.

Abstract: The effects of amorphous silica (Aerosil) and of aluminium hydroxide on anti-DNP IgE antibody production were studied in Swiss mice preimmunized with Ascaris protein and then challenged 7 days later w

Treatment of oillcontaining waste water

Abstract: PURPOSE:To remove oil from emulsified oil-containing waste water quickly, cheaply and efficiently, by treating the waste water with an emulsion treating agent such as metal oxide, hydroxide, etc. CONSTITUTION:The emulsified oil-containing waste water discharged from a heavy compressor or the like and removed of floating oil is treated with the emulsion treating agent so that the remaining oil is removed from the waste water. The emulsion treating agent is powder of at least one of metal oxide such as ferric oxide or magnesium oxide, hydroxide such as aluminium hydroxide or ferric hydroxide, aluminium phosphate and ferric phosphate. The oil adheres to the surface of the emulsion treating agent. The oil is removed from the agent by heating or burning, thereby regenerating the agent.

Studies on recrystallised aluminium trihydroxide precipitates: The energetics of dissolution by sodium hydroxide solutions

Abstract: Aluminium hydroxide gels were recrystallised in high pH solution for 2–1000 hr to give a series of gibbsite powders of different surface areas, 1`11/2, P11/8, P11/48, P11/360 and P11/X; their average platelet lengths were 30, 60, 130, 260 and 450 nm. The dissolution equilibria of these powders in sodium hydroxide solutions of C=1-8 M were studied at 20° to 80°C. The equilibrium constants (for formation of diaquo-tetrahydroxoaluminate anion) increased with temperature and with increasing surface area; the K value for P11/2 was about four times that of P 11/X at 20 °C and about three times (that for P 11/X) at 80 °C. The dissolutions were endothermic; however, the value over this temperature range increased from −29.5 kJ mol−1 (for P11/X) to −24.7 kJ (for P 11/2). This increase was related to the appreciable surface energies of the high surface-area materials. The (− ΔG°) values increased with increasing temperature and in turn with increasing surface area; the (− ΔG°) values for 1`11/2 dissolution at any temperature were about 4 kJ mol−1 higher than those for P11/X dissolution.

Aluminium magnesium carbonate

Abstract: A new basic aluminium magnesium carbonate of the formula Al2Mg6(OH)14)CO3)2.4H2O is prepared by heating a mixture of aluminium hydroxide and magnesium hydroxide in the proportions of 6 moles of magnesium hydroxide per mole of Al2O3 present in the presence of carbon dioxide in an aqueous medium containing ammonia or a water-soluble organic nitrogen-containing base (e. g. a mono-, di- or tri-alkylamine, or pyridine or piperidine), the amount of ammonia or water-soluble organic base present in the reaction mixture being at least 6 moles per mole of Al2O3 present, at a temperature between 70° and 100°C at atmospheric pressure. The said aluminium magnesium carbonate may be used to give stable pharmaceutical formulations for the treatment of upper gastrointestinal tract disturbances associated with excess acid and pepsin secretion or biliary reflux.

Method of preparing catalyst for carbon oxide conversion

Abstract: FIELD: chemistry of catalysts. SUBSTANCE: method involves mixing copper, zinc and aluminium oxide, hydroxide and carbonate in the presence of water followed by drying, calcination and forming. Aluminium hydroxide is mixed with chromic acid solution at 80-90 C and copper basic carbonate salt and zinc oxide were added to the obtained suspension. EFFECT: enhanced activity and stability of catalyst.

Coarse aluminium hydroxide mfr. by bayer process - with addn. of sodium oxalate crystals to prevent contamination with fines

Abstract: In the Bayer process for the prodn. of coarse Al hydroxide (I) by adding (I) seeds to a concn. Na aluminate soln. to ppte (I), Na oxalate crystals produced by any conventional method, are also added to the soln. Na oxalate crystals are pref. added in an amt. of 0.5-50 wt.% w.r.t. the Na oxalate dissolved in the Na aluminate soln. The addn. of Na oxalate crystals reduces contamination of the seed material with Na oxalate crystals, esp. those with a particle length 20 mu m, since the spontaneous formation of seeds from the Na oxalate in the soln. is prevented, giving a coarser prod. The prod. is esp. useful in the electrolytic prodn. of Al from Al2O3.

Treatment of waste water containing phosphorus

Abstract: PURPOSE:To heighten, the efficiency of removal when the phosphorus in waste water is removed by addition of a sulfuric acid band, by adding bicarbonic ions and stabilizing and growing aluminium hydroxide blocks produced.

Removing fluoride from water - by pptn. with calcium then adsorption on aluminium hydroxide

Abstract: Fluoride is removed from water by first adding a Ca salt to prod. a finely-divided ppte. of CaF2, and then adding an Al salt so that the ppte. is adsorbed onto the Al(OH)3 flocs formed. These flocs are then removed from the soln. by flotation of filtration. Pref. additives are CaCl2 or Ca(HCO3)2. esp. to provide as Ca 2-4 wt. times the concn. of F ions, and polymeric Al chloride. Esp. the treated soln. is satd. with air under excess pressure, then the pressure released so that the flocs of Al(OH)3 are carried to the surface as a thin layer by air bubbles. Reduced requirement for chemicals is obtd. c.f. use of Al sulphate only. The flocs can be sepd. by flotation as well as sedimentation.

Ellipsometric Observations of Aluminium Hydroxide Films Grown in Water Vapor

Abstract: The paper describes ellipsometrie investigations of aluminium hydroxide films grown on aluminium surfaces which have been exposed to water vapor. The types of samples used for the investigations have been:- 1. Commercial aluminium sheet which had been etched by Argon ions and exposed to water vapor in a vacuum system at 25 °C. 2. As supplied commercial aluminium sheet which had been chemically or mechanically cleaned and exposed to saturated water vapor at 70°C. 3. Freshly deposited films exposed to water vapor in a vacuum system at 25°C.