发明名称 |
Verfahren zur Behandlung eines verbrauchten, Chrom- enthaltenden Fluorierungskatalysators, |
摘要 |
<p>PCT No. PCT/GB93/01889 Sec. 371 Date Mar. 17, 1995 Sec. 102(e) Date Mar. 17, 1995 PCT Filed Sep. 7, 1993 PCT Pub. No. WO94/06558 PCT Pub. Date Mar. 31, 1994A process for the removal of fluoride from a spent chromium-based fluroination catalyst by contacting the catalyst with potassium hydroxide to produce a suspension of solid hydrated chromium oxide in aqueous potassium fluoride. The solid hydrated chromium oxide may be separated from the solution, washed with water and/or aqueous acid, and contacted with nitric acid to produce a chromium (HI) nitrate solution from which a chromium-based catalyst may be prepared by precipitation of hydrated chromium oxide therefrom with aqueous alkali, and washing, drying and calcining the hydrated chromium oxide.</p> |
申请公布号 |
DE69312943(T2) |
申请公布日期 |
1997.12.11 |
申请号 |
DE1993612943T |
申请日期 |
1993.09.07 |
申请人 |
IMPERIAL CHEMICAL INDUSTRIES PLC, LONDON, GB |
发明人 |
ALLEN, JOHN, GRAHAM 49 LINDFIELD CLOSE, WARRINGTON WA4 6UG, GB;LEGG, DANIEL, HOWARD 11 EASTWAY, WIRRAL L66 1SG, GB |
分类号 |
B01J23/92;B01J27/132;B01J38/64;C01G37/00;C01G37/02;C07C17/087;C07C17/20;C07C17/21;C07C17/38;C07C19/08;C07C47/395;(IPC1-7):B01J23/92;B01J23/26;C07C17/00 |
主分类号 |
B01J23/92 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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