Ethylene oligomerization catalyst and method for continuously producing 1-hexene and 1-octene

An ethylene oligomerization and catalyst technology, which is applied in chemical instruments and methods, catalysts, and bulk chemical production, etc., can solve problems such as affecting the heat transfer of the reactor, clogging the pipeline, affecting the continuous operation time of the device, etc. The effect of reducing pipeline blockage and improving plant running time
CN113441185AActive Publication Date: 2021-09-28WANHUA CHEM GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WANHUA CHEM GRP CO LTD
Publication Date
2021-09-28

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Abstract

The invention discloses a method for continuously producing 1-hexene and 1-octene, the method comprises the following steps: (1) mixing a solvent and an aluminum alkyl compound through a mixing tank, continuously introducing the mixture into a reaction kettle, introducing ethylene, and carrying out ethylene oligomerization reaction under the action of a continuously introduced catalyst to obtain a reaction solution containing 1-hexene and 1-octene; (2) a reaction solution containing 1-hexene and 1-octene enters an overflow tank reactor through an overflow pipeline; and (3) enabling the reaction liquid obtained in the overflow tank reactor to enter a quenching reactor, and quenching the reaction by using an alcohol substance as a quenching agent to obtain 1-hexene and 1-octene. The used catalyst is a solution formed by a metal chromium compound, a PNSiNP ligand and an organic boron compound. Under the condition that the reaction temperature is not changed, the overflow tank adopts a higher temperature, and a polymer from the reaction kettle can be dissolved in a reaction solution, so that the possibility of pipeline blockage is reduced, and the continuous operation time of the device is prolonged.
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Description

technical field

[0001] The invention belongs to the field of ethylene oligomerization technology, and relates to an ethylene oligomerization catalyst and a method for continuously producing 1-hexene and 1-octene. Background technique

[0002] Linear α-Olefins (linear α-Olefins, LAOs) are important organic chemical raw materials, among which 1-octene and 1-hexene are the most widely used. As an important organic raw material and chemical intermediate, 1-octene is mainly used in the production of high-end PE and POE, as well as raw materials for the production of plasticizers, detergent alcohols and lubricating oil additives. 1-Hexene is mainly used in the production of linear low density polyethylene (LLDPE) and high density polyethylene (HDPE). 1-hexene and 1-octene products are also included in the National Petroleum and Chemical Industry Development Guidelines to encourage key development of chemical products. Ethylene oligomerization is currently one of the main methods...

Claims

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