Aluminium hydroxide

About: Aluminium hydroxide is a research topic. Over the lifetime, 2043 publications have been published within this topic receiving 22032 citations. The topic is also known as: Al(OH)3 & Amphojel.

Fire resistant water-based self-adhesion coating

Abstract: The invention discloses a high-temperature resistance water-based self-adhering paint, which comprises the following parts: 10-80% main agent, which contains alkaline metal silicate from one of quaternary amine, tertiary amine and silicate of guanidine (23.5- 46.3% silicate or 67.8-83.9% phosphate); 26.8-45.1% solidifier, which concludes metal oxide, aluminium hydroxide, magnesium fluosilicate, magnesium borate, zinc borate, magnesium phosphate or potassium phosphate; 16.1-32.2% filler, which contains silica, alumina, mullite, boron nitride or mica.

A new hydroxide-based synthesis method for inorganic polymers

Abstract: A new synthesis method is described to produce aluminosilicate inorganic polymers by direct reaction of aluminium hydroxide with amorphous silica under alkaline conditions. XRD and 27Al and 29Si MAS NMR spectroscopy suggest that the reaction mechanism involves the dissolution of the aluminium hydroxide in the alkali. The best results are obtained with more reactive gibbsite of small particle size and X-ray amorphous ρ-alumina containing 5-fold coordinated Al, and with compositions in the previously reported optimum range (SiO2: Al2O3 = 3.0, M2O: SiO2 = 0.34, H2O: M2O = 9.4). Unreacted aluminium hydroxide occurs where there is insufficient silica for complete inorganic polymer formation but the reaction is less sensitive to variations in the K2O: Al2O3 and K2O: SiO2 ratios. Zeolite formation was not observed in any of the present samples. More complex alumina sources such as thermally activated hydrotalcite can also be used to form an inorganic polymer, but under the alkaline synthesis conditions the unused alumina reacts with the poorly crystalline MgO present to re-form hydrotalcite, presumably containing atmospheric carbonate as the interlayer anion. This synthesis method can also potentially be extended to hydroxides other than those of aluminium.

Process for preparing a low tfm detergent bar composition

Abstract: A low total fatty matter content detergent bar composition comprising a surfactant 25-70% total fatty matter, 9-16% by weight colloidal aluminium hydroxide and 12-52% water. The invention also comprises a process for preparing a detergent bar comprising a surfactant, 25-70% total fatty matter, 0.5-20% colloidal aluminium hydroxide and 15-52% water, comprising the steps of reacting one or more fatty acids or fats with sodium aluminate with a solid content of 20-55% wherein the Al2O3 to Na2O ratio is in the region 0.5-1.55:1 to obtain a mixture of aluminium hydroxide and soap at a temperature of between 40°C and 95°C, adding a predetermined amount of water to the mixture of aluminium hydroxide and soap, adding any further minor additives, and converting the product into bars.

Can Low-dosage Aluminium Hydroxide Control the Plasma Phosphate without Bone Toxicity?

Abstract: Sixteen patients treated exclusively by haemodialysis using reverse osmosis water treatment for up to 7 years (mean 49.3 +/- 17 months) were assessed for evidence of bone aluminium accumulation and toxicity. All patients were treated with aluminium hydroxide phosphate binders for the duration of dialysis but the dosage was restricted to a maximum of 2.85 g daily (mean daily dose 2.6 +/- 0.8 g). The mean plasma phosphate over the 12 months prior to the study was 1.68 +/- 0.42 mmol/l and in only three patients was adequate control of the plasma phosphate not achieved. No patient had evidence of fracturing bone disease. Bone aluminium staining was present in only two patients but was seen at the calcification front in only one of these. Three patients had histological evidence of osteomalacia, but in none was aluminium staining present. Mean bone aluminium was moderately high at 36.67 +/- 31 micrograms/g and in only three patients exceeded 40 micrograms/g. This study indicates that adequate control of the plasma phosphate can be achieved with low dosage of aluminium hydroxide, and in the medium term is not associated with evidence of bone aluminium toxicity.