Oligomerization catalyst and process for the production thereof
The invention relates to an oligomerization catalyst comprising nickel oxide and silica-alumina support material and to a process for oligomerization of C3- to C6-olefins using the oligomerization catalyst.
1. An oligomerization catalyst comprising nickel oxide, an Al-free and Si-containing binder and an amorphous silica-alumina support material, wherein the catalyst has a composition of from 15% to 40% by weight of NiO, from 5% to 20% by weight of Al 2 O 3 , from 55% to 80% by weight of SiO 2 and 0.01% to 1% by weight of an alkali metal oxide, wherein the oligomerization catalyst has a ratio of tetrahedrally coordinated framework aluminium atoms to octahedral coordinated framework aluminium atoms of 75:25 to 100:0, determined by 27 Al MAS NMR.
2. The oligomerization catalyst according to claim 1 , wherein the oligomerization catalyst has a specific BET surface area of from 150 to 400 m 2 /g, determined by nitrogen physisorption.
3. The oligomerization catalyst according to claim 1 , wherein the oligomerization catalyst has mesopores and macropores.
4. The oligomerization catalyst according to claim 3 , wherein the mesopores of the oligomerization catalyst have an average pore diameter of from 5 to 15 nm determined by mercury porosimetry.
5. The oligomerization catalyst according to claim 3 , wherein the macropores of the oligomerization catalyst have an average pore diameter of from 1 to 100 μm determined by mercury porosimetry.
6. The oligomerization catalyst according to claim 1 , wherein the oligomerization catalyst is in the form of granulate.
7. The oligomerization catalyst according to claim 1 , wherein the oligomerization catalyst has an average particle diameter (d50) of from 0.1 mm to 7 mm, determined by imaging methods according to ISO 13322-1 (2004 Dec. 1 version) and ISO 13322-2 (2006 Nov. 1 version).
8. The oligomerization catalyst according to claim 2 , wherein the oligomerization catalyst has mesopores and macropores.
9. The oligomerization catalyst according to claim 2 , wherein the oligomerization catalyst is in the form of granulate.
10. The oligomerization catalyst according to claim 2 , wherein the oligomerization catalyst has an average particle diameter (d50) of from 0.1 mm to 7 mm, determined by imaging methods according to ISO 13322-1 (2004 Dec. 1 version) and ISO 13322-2 (2006 Nov. 1 version).