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Method for preparing triisobutylene by oligomerization of isobutylene

A technology of triisobutene and isobutene, which is applied in the field of isobutene oligomerization to prepare triisobutene, can solve the problems of catalyst deactivation when encountering polar substances, low triisobutene selectivity, etc.

Active Publication Date: 2021-11-12
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to overcome the deficiencies in the prior art, the present invention provides a method for preparing triisobutene by oligomerization of isobutene to solve the problem of low selectivity of isobutene oligomerization product triisobutene and catalyst encountering Inactivation of polar substances, etc.

Method used

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  • Method for preparing triisobutylene by oligomerization of isobutylene

Examples

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Effect test

Embodiment 1

[0066] combined with figure 1 , the lower part of the first reactor R1 and the second reactor R2 are filled with adsorbent spherical alumina, and the upper part is filled with catalyst macroporous cationic sulfonic acid resin (purchased by the manufacturer: Dow). The catalyst filling height in the first reactor is the adsorbent 4 times of the packing height, and the catalyst packing height in the second reactor is 8 times of the adsorbent packing height. The catalyst loading volume of the second reactor R2 is 10 times that of the first reactor R1. Isobutene from outside the device at a temperature of 15°C, a pressure of 0.4MPa, and a flow rate of 80kg / h is heated to 60°C by the feed heater E5 of the raw material IB and enters the reactor from the bottom of the first reactor R1 for oligomerization. Among them, the first reactor feed volume space velocity is 4h -1 , the reaction pressure is controlled at 2.0 MPa, and at this time, the first reactor R1 is a liquid phase reactio...

Embodiment 2

[0071] combined with figure 1 The first reactor R1 and the second reactor R2 are loaded with adsorbent and catalyst as in Example 1, and the isobutylene from outside the device with a temperature of 15°C, a pressure of 0.4MPa, and a flow rate of 80kg / h is heated by the feed heater E5 of the raw material IB It enters the reactor from the bottom of the first reactor R1 to 60°C for oligomerization. Among them, the first reactor feed volume space velocity is 4h -1 , the reaction pressure is controlled at 2.0 MPa, and at this time, the first reactor R1 is a liquid phase reaction. After the material at the outlet of the first reactor R1 is stored in the buffer tank D4 at the outlet of the first reactor, about 40kg of it is cooled to 30°C by the outlet cooler E4 of the first reactor and enters the second reactor R2; the other about 40kg enters the Separation column C1.

[0072] About 30.4kg of the top material of separation tower C1 (about 28.5kg of by-product diisobutylene) is re...

Embodiment 3

[0076] combined with figure 1 The first reactor R1 and the second reactor R2 are loaded with the same adsorbent and catalyst as in Example 1, and the isobutylene from outside the device at a temperature of 15° C., a pressure of 0.4 MPa, and a flow rate of 80 kg / h is fed to the heater E5 through raw material IB. Heating to 60°C enters the reactor from the bottom of the first reactor R1 for oligomerization. Among them, the first reactor feed volume space velocity is 4h -1 , the reaction pressure is controlled at 2.0 MPa, and at this time, the first reactor R1 is a liquid phase reaction. After the material at the outlet of the first reactor R1 is stored in the buffer tank D4 at the outlet of the first reactor, about 32kg is cooled to 30°C by the outlet cooler E4 of the first reactor and enters the second reactor R2; the other about 48kg enters the Separation column C1.

[0077] About 35.4kg of the top material of the separation tower C1 (about 33.5kg of by-product diisobutene)...

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Abstract

The invention provides a method for preparing triisobutylene by oligomerization of isobutylene, which comprises the following steps: a, enalbing isobutylene to pass through two serially connected reactors to prepare an isobutylene oligomerization product under the catalysis of a macroporous cationic sulfonic acid resin catalyst, wherein an outlet material of a first reactor is mixed with isobutylene to serve as a raw material of a second reactor; and b, separating the isobutylene oligomerization product through a triisobutylene separation tower to obtain a product triisobutylene, obtaining an oligomerization by-product diisobutylene and a small amount of triisobutylene at the tower top, and recovering diisobutylene to the inlet of the second reactor to continue to react with isobutylene to prepare triisobutylene. According to the change of the components at the outlet of the first reactor, the recovery amount of diisobutylene is adjusted, the feeding composition of the second reactor is controlled, the output proportion of the byproduct diisobutylene is reduced, and the yield of the product triisobutylene is improved.

Description

technical field [0001] The invention relates to a method for preparing triisobutene by oligomerization of isobutene. Background technique [0002] Refinery and petrochemical plants by-produce a large amount of C4 olefins. At present, the chemical utilization rate of butene (including 1-butene, cis-2-butene and trans-2-butene) is very low. Therefore, the chemical utilization of a large amount of surplus and low-value butene has become one of the urgent problems for petrochemical enterprises to solve. So far, researchers have developed a series of schemes to use butene to produce high value-added chemicals, such as butene alkylation reaction, butene oligomerization reaction, and the production of methyl ethyl ketone, sec-butanol, sec-acetate from butene Butyl fat and other processes. Among many butene utilization schemes, butene oligomerization and its process have been paid more and more attention. [0003] Isobutylene oligomerization products are important intermediates ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/28C07C7/04C07C11/02
CPCC07C2/28C07C7/04C07C2531/10C07C11/02Y02P20/584
Inventor 王旭迟蒙蒙何光文杨国忠姜庆梅方子来
Owner WANHUA CHEM GRP CO LTD
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