Abstract Novel oligomerization catalysts comprising cobalt oxide on carbon in admixture with certain other catalyst supports, such as refractory oxides, i.e. alumina, silica alumina and molecular sieves and the like are herein disclosed. The preparation of said novel catalysts is likewise disclosed and the use of said catalysts in propylene oligomerization reactions is hereby described and claimed. The novel oligomerization catalysts are produced by: (a) impregnating activated carbon with a solution containing a cobalt amine complex; (b) treating the impregnated activated carbon at elevated temperatures in order to decompose the cobalt salt to cobalt oxide; and (c) thereafter admixing the so-formed cobalt oxide on carbon with a catalyst support material such as bauxite. In another embodiment, the catalysts may be prepared by impregnating carbon with cobalt nitrate, adding aqueous sodium hydroxide or potassium hydroxide to convert the cobalt nitrate to cobalt hydroxide, extracting with water from the mixture the sodium or potassium nitrate formed, decomposing at high temperatures the cobalt hydroxide to cobalt oxide and thereafter admixing the cobalt oxide on carbon with a catalyst support such as alumina, bauxite, molecular sieves and the like.
A method of preparing alkene oligomerization catalysts which comprises: a. impregnating activated carbon with a solution of cobalt amine complexes having the generic formula [CoA(NH.sub.3).sub.4 ]B where A is a carbonate or oxalate radical and B is a moiety selected from the group consisting of CO 3 H, CO 3 NH 4 , C 2 O 4 H and C 2 O 4 NH; b. decomposing said activated carbon impregnated with said cobalt amine complexes at temperatures of between about 250° to about 350° C. to produce cobalt oxide on carbon; and thereafter, c. admixing said cobalt oxide on carbon with a refractory oxide as a catalyst support.
Claim 2
Independent Claim
108 words
A method of preparing alkene oligomerization catalysts which comprises: a. impregnating activated carbon with a solution of cobalt amine complexes having the generic formula [CoA(NH.sub.3).sub.4 ]B where A is a carbonate or oxalate radical and B is a moiety selected from the group consisting of CO 3 H, CO 3 NH 4 , C 2 O 4 H and C 2 O 4 NH; b. decomposing said activated carbon impregnated with said cobalt amine complexes at temperatures of between about 250° to about 350° C. to produce cobalt oxide on carbon; and thereafter, c. admixing said cobalt oxide on carbon with a refractory oxide as a catalyst support.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein the refractory oxide contains alumina.