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Activated alumina

About: Activated alumina is a research topic. Over the lifetime, 1430 publications have been published within this topic receiving 31090 citations.


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Patent
18 May 1988
TL;DR: In this paper, a method for purifying gases and waste gases of acidifying gases, such as hydrogen chloride, hydrogen fluoride, sulfur dioxide and hydrogen cyanide, nitrogen oxides, hydrocarbons, chlorinated hydro-carbons and volatile heavy metals such as mercury, arsenic, antimony, cadmium and thallium, is described.
Abstract: The invention relates to a method for purifying gases and waste gases of acidifying gases, such as hydrogen chloride, hydrogen fluoride, sulfur dioxide and hydrogen cyanide, nitrogen oxides, hydrocarbons, chlorinated hydrocarbons, organic compounds and volatile heavy metals such as mercury, arsenic, antimony, cadmium and thallium. The gas or waste gas stream calcium hydroxide is admixed to the process was the added after deleting quicklime activated carbon, Braunkohlenherdofenkoks, activated alumina and / or silica gel. The purification is carried out in a temperature range from 20 to 1200 degrees, and the deposition of the solids takes place at Staubabscheidevorrichtungen.

4 citations

Patent
28 Jan 1976
TL;DR: In this paper, an activated type alumina from aluminum dross by digestion with water, preferably pressurized, is described, where the peculiar properties associated with trace compounds present in the product make it useful for the recovery of noxious effluents from furnacing processes, including those burning fossil fuels and those used for smelting both aluminum and steel.
Abstract: Production of an activated type alumina from aluminum dross by digestion with water, preferably pressurized. The peculiar properties associated with trace compounds present in the product make it useful for the recovery of noxious effluents from furnacing processes, including those burning fossil fuels and those used for smelting both aluminum and steel, wherein the alumina beneficially incorporates in the metallurgical flux.

4 citations

Patent
08 Nov 1984
TL;DR: In this paper, a slurry containing activated alumina is applied onto the surface of an inorganic carrier, freeze-thawing the carrier and then baking it, and uniform cavities three-dimensional connected with each other from the inner part to the entire surface of the coating layer can be formed.
Abstract: PURPOSE:To form marcropores, by applying slurry containing activated alumina onto the surface of an inorganic carrier, freeze-thawing said carrier and then baking it. CONSTITUTION:In forming macropores on the surface of an inorganic carrier of cordierite or ceramics, activated alumina such as gamma, delta or theta alumina after being kneaded with aluminum hydroxide hydrate, nitric acid, acetic acid, etc. is applied onto the surface of said inorganic carrier. Then, the carrier is freezed and vacuum dried. Hence, the coagulation of activated alumina particles can be inhibited, and uniform cavities three-dimensionally connected with each other from the inner part to the entire surface of the coating layer can be formed.

4 citations

Patent
03 Oct 1988
TL;DR: In this article, the authors proposed a method to reduce the generation of a H2S odor by forming a catalyst for purifying exhaust gas by supporting metal oxide such as activated alumina by a carrier and further supporting a metal selected from Pt, Rh and Pd or oxide thereof by said carrier.
Abstract: PURPOSE:To reduce the generation of a H2S odor, by forming a catalyst for purifying exhaust gas by supporting metal oxide such as activated alumina by a carrier and further supporting a metal selected from Pt, Rh and Pd or oxide thereof by said carrier. CONSTITUTION:At least one oxide of a metal selected from a group consisting of titanium, niobium, vanadium, tantalum and manganese is used other than activated alumina, cerium oxide and an alumina sol, and all of them are mixed and ground to prepare a slurry. After a carrier is immersed in this slurry, the impregnated carrier is dried and baked to form a film composed of composite oxide or an oxide mixture on the carrier. Subsequently, at least one catalytic metal selected from a group consisting of platinum, rhodium and palladium is supported by the film on the carrier to prepare a catalyst for purifying exhaust gas. This catalyst has high exhaust gas purifying efficiency and reduces the discharge of H2S from exhaust gas after long-time used.

4 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20237
202218
202118
202031
201941
201839