| 摘要 |
A catalyst for synthesizing 1-hexene from ethylene trimerization and its application are provided. Said catalyst consists of (a) the compound containing P and N, (b) electron donor, (c) Cr compound, (d) carrier and (e) accelerator. The molar ratio of (a), (b), (c), (d) and (e) is 0.5-100:0.5-100:1:0.5-10:50-5000. The catalyst is prepared by mixing the components of (a)-(e) in an ethylene trimerization apparatus in situ and ethylene is introduced into the apparatus continuously. The prepared catalyst can be used to synthesize 1-hexene from ethylene trimerization in the inert solvents. The trimerization is performed at 30-150° C. and 0.5-10.0 MPa for 0.1-4 hours. The catalyst has high catalytic activity and high 1-hexene selectivity. During the process of ethylene trimerization, by-product polyethylene does not stick to the apparatus. |
| 主权项 |
1. A catalyst for synthesizing 1-hexene from ethylene trimerization, comprising:
(1) compound (a) containing P and N, with formula:wherein R1, R2, R3 and R4 independently are selected from the group consisting of phenyl, benzyl and naphthyl, and R5 is selected from the group consisting of isopropyl, butyl, cyclopropyl, cyclopentyl, cyclohexyl, and fluorenyl;
(2) electron donor (b), which is 1,4-dichlorobenzene, 1,1,2-trichloroethane, 1,1,2,2-tetrachloroethane, 1,1,2,2-tetrabromoethane, 1,2-dichlorethane, 1,2-dimethoxyethane, chlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, and/or 1,4-dichlorobenzene; (3) Cr compound (c), which is chromium isooctoate, chromium chloride tetrahydrofuran, chromium 2-ethylhexanoate, and/or chromium acetylacetonate; (4) carrier (d), which is SiO2; and (5) accelerator (e), which is trimethylaluminium, triethylaluminium, tripropyl aluminium, tributylaluminium and/or triisobutylaluminium;wherein a molar ratio of (a), (b), (c), (d) and (e) is 1-80:1-70:1:1-8:100-4000. |
