Showing papers on "Aluminium hydroxide published in 1978"
TL;DR: Magnetic and optical studies were performed on coprecipitated chromium and aluminium hydroxide gels after calcination in air at temperatures between 50 and 1150°C.
Abstract: Magnetic and optical studies were performed on coprecipitated chromium and aluminium hydroxide gels after calcination in air at temperatures between 50 and 1150°C. The results show that magnetic dilution was not achieved and that surface clusters of chromium oxide were formed. The magnetism, e.s.r. and optical spectra of oxidised samples are discussed in terms of a mixed-valency phase of partially-oxidised chromium containing Cr3+ and Cr6+ species. This new model of γ-phase chromium is shown to be consistent and an acceptable part of the extensive mixed-valency chemistry of chromium.
32 citations
Patent•
26 May 1978
TL;DR: The method of preparing granulated activated alumina consists in that alumina trihydrate is decomposed by bringing it in contact with a bed of a solid heat carrier having the temperature of 350° to 600° C, the contact time being from 0.05 to 0.5 second, to obtain a product of decomposition in the form of amorphous aluminium hydroxide as mentioned in this paper.
Abstract: The method of preparing granulated activated alumina consists in that alumina trihydrate is decomposed by bringing it in contact with a bed of a solid heat carrier having the temperature of 350° to 600° C., the contact time being from 0.05 to 0.5 second, to obtain a product of decomposition in the form of amorphous aluminium hydroxide. Said decomposition product is mixed with water into a suspension having the concentration of 100-500 g/liter, calculating with reference to aluminium oxide, and hydrated at a temperature of 20°-100° C. and the pH of 5 to 12 for 0.5 to 10 hours. The hydrated decomposition product is then treated with an acid, that can form water-soluble basic salts of aluminium, at a temperature of 20° to 150° C., granulated, dried at a temperature of 20° to 150° C., and calcined at a temperature of 400° to 600° C. The granulated activated alumina can be used as an adsorbing material, as a catalyst, or a support for active components in chemical and petrochemical industry.
27 citations
TL;DR: Aluminium hydroxide and glycopyrrhonium, alone or in combination, clearly retarded the EMB absorption and Repeated breath alcohol analysis proved unsuitable to indicate the time course of gastric emptying in these circumstances.
Abstract: 1 The effect of aluminium hydroxide and/or of glycopyrrhonium on the absorption of a single oral 50 mg/kg dose of ethambutol (EMB) was investigated on thirteen tuberculous in-patients and on two groups of healthy volunteers with six subjects each. The EMB concentrations in serum and 10+h urine were measured by colorimetry. 2 In order to assess gastric emptying the healthy volunteers ingested ethanol, either 0.5 g/kg in 10% solution or 0.8 g/kg in 20% solution, simultaneously with the drug, and breath alcohol levels were measured repetitively. 3 Aluminium hydroxide significantly lowered the serum EMB levels of the patients during the first 4 h after the EMB intake. No consistent effect was found in the first student experiment, whereas in the second experiment aluminium hydroxide and glycopyrrhonium, alone or in combination, clearly retarded the EMB absorption. 4 Repeated breath alcohol analysis proved unsuitable to indicate the time course of gastric emptying in these circumstances.
27 citations
Patent•
08 Dec 1978TL;DR: In this article, a hardenable resin composition containing as a fire retardant ingredient particulate aluminium hydroxide was described, where 10 to 30% by weight of the particles had a diameter less than 1 micron, 45 to 75% by the weight of particles had diameter in the range from 38 to 150 microns and less than 20% by 20% of the components had a size in the ranges from 1 to 38 microns.
Abstract: A hardenable resin composition (or a component thereof) containing as a fire retardant ingredient particulate aluminium hydroxide wherein 10 to 30% by weight of the particles have a diameter less than 1 micron, 45 to 75% by weight of the particles have a diameter in the range from 38 to 150 microns and less than 20% by weight of the particles have a diameter in the range from 1 to 38 microns. The invention includes a preferred blend of aluminium hydroxide.
13 citations
9 citations
Patent•
29 Nov 1978TL;DR: In this paper, a flame-resistant polyurethane foam is obtained by treatment of the foam with a mixture of aluminium hydroxide and a carboxyl group-containing polychloroprene latex and cross-linking the latex with zinc oxide or magnesium oxide.
Abstract: A flame-resistant polyurethane foam is obtained by treatment of the foam with a mixture of aluminium hydroxide and a carboxyl group-containing polychloroprene latex and cross-linking the latex with zinc oxide or magnesium oxide.
8 citations
3 citations
Patent•
27 Jun 1978
TL;DR: In this paper, a 3:1 to 1:3 (in mole) mixture of an insoluble calcium salt and an aluminium compound is heat treated at 100 to 450 deg.C, and then the baked product thus obtained is used in the treatment of waste water containing organics such as dyes, etc., for purification as an adsorbent.
Abstract: PURPOSE:To obtain purified water only one process by subjecting the scouring and dyeing waste watr to an adsorption treatment using a treating agent obtained by baking a mixture of insoluble calcium salt and aluminium compound. CONSTITUTION:A 3:1 to 1:3(in mole) mixture of an insoluble calcium salt, e.g., calcium sulfate, calcium carbonate, etc., and an aluminium compound, e.g., aluminium hydroxide, aluminium oxide, etc., is heat treated at 100 to 450 deg.C, and then the baked product thus obtained is used in the treatment of waste water containing organics such as dyes, etc., for purification as an adsorbent, whereby all kinds of dyes, surfactants, sizing materials, etc., present in waste water can be concurrently removed by adsorption and oxidation.
2 citations