发明名称 |
NICKEL-SUBSTITUTED AND MIXED NICKEL-AND-COBALT-SUBSTITUTED CHROMIUM OXIDE COMPOSITIONS, THEIR PREPARATION, AND THEIR USE AS CATALYSTS AND CATALYST PRECURSORS |
摘要 |
<p>A crystalline alpha-chromium oxide where from about 0.05 atom % to about 2 atom % of the chromium atoms in the alpha-chromium oxide lattice are substituted by nickel atoms, and optionally, additional chromium atoms in the alpha-chromium oxide lattice are substituted by trivalent cobalt atoms (provided that the total amount of the nickel atoms and the trivalent cobalt atoms in the alpha-chromium oxide lattice is no more than 6 atom %) is disclosed. Also disclosed is a chromium-containing catalyst composition comprising as a chromium-containing component the crystalline substituted alpha-chromium oxide; and a method for preparing a composition comprising the crystalline substituted alpha-chromium oxide. The method comprises (a) co-precipitating a solid by adding ammonium hydroxide to an aqueous solution of a soluble divalent nickel salt, a soluble trivalent chromium salt, and optionally, a soluble divalent or trivalent cobalt salt, that contains at least three moles of nitrate per mole of chromium in the solution, has a nickel concentration of from about 0.05 mole % to about 2 mole % of the total of nickel, chromium, and cobalt in the solution, and has a combined concentration of nickel and cobalt of no more than 6 mole % of the total of nickel, chromium, and cobalt in the solution; and after at least three moles of ammonium per mole of chromium has been added to the solution; (b) collecting the co-precipitated solid formed in (a); (c) drying the collected solid; and (d) calcining the dried solid. Also disclosed is a chromium-containing catalyst composition comprising a chromium-containing component prepared by treating said crystalline substituted alpha-chromium oxide with a fluorinating agent; and a process for changing the fluorine distribution (i.e., content and/or arrangement) in a hydrocarbon or halogenated hydrocarbon in the presence of a catalyst. The process involves using as the catalyst a composition comprising the crystalline substituted alpha-chromium oxide and/or the treated substituted alpha-chromium oxide.</p> |
申请公布号 |
EP1551551(A1) |
申请公布日期 |
2005.07.13 |
申请号 |
EP20030793282 |
申请日期 |
2003.08.21 |
申请人 |
E.I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
NAPPA, MARIO, J.;RAO, VELLIYUR, NOTT, MALLIKARJUNA;ROSENFELD, H., DAVID;SUBRAMONEY, SHEKHAR;SUBRAMANIAN, MUNIRPALLAM, A.;SIEVERT, ALLEN, C. |
分类号 |
C01G37/02;B01J23/00;B01J23/26;B01J23/86;B01J35/00;B01J35/02;B01J37/02;B01J37/03;B01J37/26;C07B61/00;C07C17/08;C07C17/10;C07C17/158;C07C17/20;C07C17/21;C07C17/23;C07C17/25;C07C17/358;C07C17/37;C07C19/07;(IPC1-7):B01J23/86;C07C19/12 |
主分类号 |
C01G37/02 |
代理机构 |
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代理人 |
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