Preparation of ultrafine aluminum hydroxide used as inorganic combustion inhibitor of maximum combustion consumption, involves adding water to precipitated alumina to form aqueous slurry, drying slurry in spray dryer, and collecting
	KAPURI N; REVANKAR H; GHOSH D
	2023-07-03
专利权人	HINDALCO IND LTD (HIND-Non-standard)
申请日期	2023-07-03
专利号	IN202321044525-A
成果简介	NOVELTY - Preparation of ultrafine aluminum hydroxide having particle size of ≤500-600 nm, comprises: mixing an aluminum-hydroxide seed having a particle size less than or equal to 500 nm, and a surfactant with a pregnant synthetic liquor at 55-60℃ to precipitate aluminum hydroxide; adding water to the precipitated aluminum hydro hydroxide to form an aqueous slurry; drying the slurry in a spray dryer; and collecting the spray-dried ultrafine aluminium hydro-oxide from the dryer. The aluminum hydroxide seed is an aqueous dispersion, comprising 10 wt./vol.% aluminum hydroxide. The surfactant comprises polyethylene glycol (PEG 400), cationic cetyl trimethyl ammonium bromide (CTAB) and/or sodium dodecyl sulfate. USE - The method is useful for preparation of ultrafine aluminum hydroxide, which is used as an inorganic combustion inhibitor of maximum combustion consumption in the world, and widely used in many industries e.g. plastics, building materials, macromolecular material, electronics with the fire-retardant characteristics of nontoxic, halogen and electronic cigarettes. ADVANTAGE - The process provides ultrafine aluminum hydroxide particles having specific surface area of 7-10 m2/g, bulk density in the range of 0.2-0.35 g/cc, packed bulk density 0.35-0.5 g/cc, and oil absorption of less than or equal to 35-60 g/100 g. The process is capable of economically and energy-efficiently preparing the ultrafine aluminium hydroxides with high yield and high quality and without voids, and provides the aluminum trihydroxide with excellent flame retardant effect, high performance synergistic agent, high surface energy, high flame-retardant effect and excellent compensation performance, and does not influence the mechanical property and the processing characteristics of material as additive, and has ompensation performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for an ultrafine aluminum hydroxide having particle size (d50) of ≤500 nm to 600 nm, preferably 500 nm having specific surface area of 7-15 m2/g.
IPC 分类号	C01F-007/02 ; C01F-007/04 ; C01F-007/34
国家	印度
专业领域	材料科学
语种	英语
成果类型	专利
文献类型	科技成果
条目标识符	http://119.78.100.226:8889/handle/3KE4DYBR/21420
专题	中国科学院新疆生态与地理研究所
作者单位	HINDALCO IND LTD (HIND-Non-standard)
推荐引用方式 GB/T 7714	KAPURI N,REVANKAR H,GHOSH D. Preparation of ultrafine aluminum hydroxide used as inorganic combustion inhibitor of maximum combustion consumption, involves adding water to precipitated alumina to form aqueous slurry, drying slurry in spray dryer, and collecting. IN202321044525-A[P]. 2023.

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