Claims
- 1. A preformed bifunctional catalyst obtained by bonding in an inert reaction medium:
- i. a first catalyst comprising a chromium compound on a silica or aluminum oxide support, wherein the quantity of chromium compound, based on the quantity of the support, is from 0.1 to 3.5% by weight, the chromium compound being in the form of a coordinatively unsaturated chromium (II) and/or chromium (III) compound which is obtained by treating the support with an aqueous solution of a chromium (VI) compound, separating the solution from the impregnated support, drying the impregnated support and heating it at temperatures above 500.degree. C. in an oxygen stream for 1/2 to 3 hours and subsequently reducing the chromium (VI) compound with a gaseous reducing agent at 250.degree. to 500.degree. C. to yield a coordinatively unsaturated chromium (II) compound; with
- ii) a second catalyst comprising a nickel compound selected from the group consisting of:
- a) a nickel compound produced by reaction of a nickel(O) compound, or a nickel compound which can be converted into a nickel(O) compound in situ, with an adduct or a mixture of a quinoid compound and a tertiary phosphine and with a compound of the formula (I) ##STR5## in which R.sup.1, R.sup.2 and R.sup.3, independently 9 of one another, denote optionally halogen-, hydroxyl-, C.sub.1 -C.sub.20 -alkoxy-, nitro- or C.sub.6 -C.sub.12 -aryloxy-substituted C.sub.1 -C.sub.20 -alkyl, C.sub.2 -C.sub.20 -alkenyl, C.sub.6 -C.sub.12 -aryl or C.sub.3 -C.sub.8 -cycloalkyl, or denote C.sub.6 -C.sub.12 -aryl-C.sub.1 -C.sub.20 -alkyl, C.sub.1 -C.sub.20 -alkyl-C.sub.6 -C.sub.12 -aryl, C.sub.6 -C.sub.12 -aryl-C.sub.2 -C.sub.20 -alkenyl, C.sub.1 -C.sub.20 -alkyl-C.sub.3 -C.sub.8 -cycloalkyl and C.sub.6 -C.sub.12 -aryl-C.sub.3 -C.sub.8 -cycloalkyl, di-C.sub.1 -C.sub.4 -alkylamino, phenoxy, or alkoxy,
- X denotes O, NR.sup.4 or ##STR6## R.sup.4, R.sup.5 and R.sup.6, independently of one another, denote hydrogen, acyl, silyl, halogen, cyano, nitrophenyl or R.sup.1, and n denotes zero or 1; and
- b) a nickel compound obtained by reacting a nickel (O) compound or a compound which can be converted into a nickel (O) compound in situ with compounds of the formulae (I) as defined above and (III) ##STR7## in which R.sup.10 -R.sup.14 represent, independently of one another, optionally halogen-, hydroxyl, C.sub.1 -C.sub.20 -alkoxy-, or C.sub.6 -C.sub.12 -aryloxy-substituted C.sub.1 -C.sub.20 -alkyl, C.sub.6 -C.sub.12 -aryl, C.sub.2 -C.sub.30 -alkenyl or C.sub.3 -C.sub.8 -cycloalkyl, C.sub.6 -C.sub.12 -aryl-C.sub.1 -C.sub.20 -alkyl, C.sub.1 -C.sub.20 -alkyl-C.sub.6 -C.sub.12 -aryl, halogen, hydroxyl, C.sub.1 -C.sub.20 -alkoxy, or C.sub.6 -C.sub.12 -aryloxy, in addition to which
- R.sup.13 may be hydrogen, and
- R.sup.14 may be hydrogen, acyl or sulphonate.
- 2. The preformed catalyst of claim 1, wherein R.sup.10 is C.sub.6 -C.sub.12 -aryl; R.sup.11, R.sup.12 and R.sup.14 are cyclohexyl, phenyl, tolyl, benzyl, vinyl, or C.sub.1 -C.sub.4 -alkyl; and R.sup.13 is hydrogen or C.sub.1 -C.sub.4 -alkoxy.
Priority Claims (1)
Number |
Date |
Country |
Kind |
36 21 763.8 |
Jun 1986 |
DEX |
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Parent Case Info
This application is a continuation, of application Ser. No. 08/357,157 filed on Dec. 15, 1994, which is a continuation, of application Ser. No. 08/162,788 filed on Dec. 6, 1993, which is a divisional of Ser. No. 852,916, filed Mar. 13, 1992, which is a continuation of Ser. No. 332,292, filed Mar. 31, 1989, which is a continuation of Ser. No. 063,026, filed Jun. 17, 1987, all now abandoned
US Referenced Citations (10)
Foreign Referenced Citations (5)
Number |
Date |
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2274632 |
Feb 1976 |
FRX |
3427319 |
Jan 1986 |
DEX |
594127 |
Feb 1978 |
SUX |
837251 |
Jun 1960 |
GBX |
1243563 |
Aug 1971 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Studies in Surface Science and Catalysts 25; Elsvier, Amsterdam Oxford-New York-Tokyo (1985) pp. 419-429. |
Divisions (1)
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Date |
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Parent |
852916 |
Mar 1992 |
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Continuations (4)
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Number |
Date |
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Parent |
357157 |
Dec 1994 |
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Parent |
162788 |
Dec 1993 |
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Parent |
332292 |
Mar 1989 |
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Parent |
63026 |
Jun 1987 |
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