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Catalyst compositions for selective dimerization of ethylene

A technology of catalyst and composition, which is applied in the field of catalyst system of downstream products, and can solve the problem of too long initial induction period of polymer formation

Inactive Publication Date: 2016-08-03
SAUDI BASIC IND CORP SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For Commercial Alphabutol TM system, polymer formation and an excessively long initial induction period are major disadvantages

Method used

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  • Catalyst compositions for selective dimerization of ethylene
  • Catalyst compositions for selective dimerization of ethylene
  • Catalyst compositions for selective dimerization of ethylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] Example 1 shows a catalyst system comprising a tetrasubstituted titanate, dibutyl ether and trialkylaluminum, and its use in the production of α-olefins from olefins, in particular 1-butene from ethylene use in . The results are summarized in Table 1.

[0106] Example 1a. The reaction was carried out in a batch reactor (Parr 300ml autoclave model 4566 Mini Bench Reactor) at 60°C and 23 bar. This temperature and pressure is maintained in the reactor throughout the reaction. 0.25 ml of tetra-n-butyl titanate (DorfKETAL) and 0.25 ml of dibutyl ether (Aldrich) were introduced into 50 ml of n-hexane (Aldrich). 1.8 ml of a 1M triethylaluminum solution in n-hexane was added thereto. The catalyst system in hexane was introduced into the reactor. The reaction system was heated to 60° C. with stirring and pressurized to 23 bar with ethylene for 1 hour. After depressurization, the product was collected in an adjacent vessel.

[0107] Example 1b (comparative). Example 1a was ...

Embodiment 2

[0112] Example 2 shows a catalyst system comprising a tetraalkyl titanate, a silicate and a trialkyl group, and its use in a process for the production of α-olefins from olefins, in particular 1-butene from ethylene. use. The results are summarized in Table 2.

[0113] Example 2a. The reaction was carried out in a batch reactor (Parr 300 ml autoclave model 4566 Mini Bench Reactor) at 60°C and 23 bar. This temperature and pressure is maintained in the reactor throughout the reaction. 0.25 ml of tetra-n-butyl titanate (DorfKETAL) and 0.25 ml of tetraethyl silicate (Aldrich) were introduced into 50 ml of n-hexane (Aldrich). 1.8 ml of a 1M triethylaluminum solution in n-hexane was added thereto. The catalyst system in hexane was introduced into the reactor. The reaction system was heated to 60° C. with stirring and pressurized to 23 bar with ethylene for 1 hour. After depressurization, the product was collected in an adjacent vessel. The yield of 1-butene was 90%, expressed ...

Embodiment 3

[0118] Example 3 shows a catalyst system comprising titanate, ether, methylaluminoxane, and optionally a second aluminum compound, and its use in the production of polymers from olefins, especially ethylene. Uses in methods of polyethylene.

[0119] Example 3a. The reaction was carried out in a batch reactor (Parr 300ml autoclave model 4566 Mini Bench Reactor) at 60°C and 23 bar. This temperature and pressure is maintained in the reactor throughout the reaction. 0.25 ml of tetra-n-butyl titanate (DorfKETAL) and 0.25 ml of tetrahydrofuran (Aldrich) were introduced into 50 ml of n-hexane (Aldrich). 1.8 ml of a 1M solution of methylalumoxane in n-heptane (MAO) was added thereto. The catalyst system in hexane was introduced into the reactor. The reaction system was heated to 60° C. with stirring and pressurized to 23 bar with ethylene for 1 hour. After depressurization, the product was collected in an adjacent vessel. The yield of polymer was 95%, expressed as a percentage ba...

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Abstract

A catalyst composition, including a titanate of the formula Ti(OR)4 wherein each R is the same or different, and is a hydrocarbon residue; a catalyst additive, wherein the catalyst additive is a dibutyl ether a silicate, a silazane, an aromatic ether, a fluorocarbon, or a combination comprising at least one of the foregoing; and an organic aluminium compound.

Description

technical field [0001] Disclosed herein are catalyst systems and processes for dimerizing olefins to produce alpha-olefins, in particular catalyst systems and processes for dimerizing ethylene to produce 1-butene or their downstream products. Background technique [0002] Alpha-olefins such as butene are desirable substances in the chemical industry. Due to the presence of terminal double bonds, they can be transformed into a large number of other valuable compounds. For example, butenes can be converted to compounds such as butanol, butadiene and butanone. It can be used as monomer or comonomer in polymerization reactions and is especially valuable in the production of plastics. For example, it can be used as a comonomer with ethylene to produce high strength and high stress crack resistance polyethylene. One route to butenes is the cracking of higher petrochemical fractions containing more than 4 carbon atoms. Another route to butenes that has been the subject of inten...

Claims

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Application Information

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IPC IPC(8): B01J31/14C07C2/30C07C11/08C08F210/16C08F110/02C08F4/651
CPCB01J31/128B01J31/143C07C2/26C08F10/02C07C2/30C08F110/02C08F210/16B01J31/0204B01J31/0212B01J31/0231B01J31/0237B01J31/0274B01J31/0275C07C2531/14C07C2531/12B01J2231/122B01J2231/12B01J2231/20C07C11/08C08F4/6494C08F4/6428C08F4/651B01J31/02C08F10/08C07C2531/02C08F10/00B01J2531/004B01J2531/007B01J2523/47C07C2/10C08F2/04C08F2410/01
Inventor 罗兰·施密特穆罕默德·H·艾尔-哈兹米穆罕默德·F·艾尔-阿纳齐德夫兰詹·J·普拉丹
Owner SAUDI BASIC IND CORP SA
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