Catalyst based on a group VI metal and a group VIII metal at...

Details Catalyst based on a group VI metal and a group VIII metal at... Catalyst based on a group VI metal and a group VIII metal at...

2007-02-20

2007-02-20

Nguyen, Cam N. (Department: 1754)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

C208S124000, C208S111300, C208S111350, C502S074000, C502S255000, C502S258000, C502S259000, C502S260000, C502S261000, C502S262000, C502S307000, C502S314000, C502S315000, C502S316000, C502S317000, C502S321000, C502S322000, C502S323000

Reexamination Certificate

active

10631966

ABSTRACT:
A catalyst contains at least one group VIII element and at least molybdenum and/or tungsten, said elements being present at least in part in the catalyst in the dry state in the form of at least one heteropolyanion with formula MxAB6O24H6C(3-2x), tH2O; MxAB6O24H6C(4-2x), tH2O; MxA2B10O38H4C(6-2x), tH2O; MxA2B10O38H4C(8-2x), tH2O; or MxA2B10O38H4C(7-2x), tH2O, in which M is cobalt and/or nickel and/or iron and/or copper and/or zinc, A is one or two elements from group VIII of the periodic table, B is molybdenum and/or tungsten and C is an H+ion and/or a (NR1R2R3R4)+type ammonium ion, in which R1, R2, R3and R4, which may be identical or different, correspond either to a hydrogen atom or to an alkyl group and/or caesium and/or potassium and/or sodium, t is a number between 0 and 15 and x takes a value in the range 0 to 4 depending on the formula.

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Pettiti I et al :“Anderson-type heteropoloxomolybdates in catalysis—2. EXAFS study on gamma—A1203- supported Mol, Co and Ni sulfided phases as HDS catalysts” Applied Catalysis A : General, Elsevier Science , Amsterdam, NL, vol. 220, No. 1-2, Oct. 25, 2001, pp. 113-121.

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