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Butene recovery method

A recovery method and technology of butene, applied in the direction of fractional condensation purification/separation, organic chemistry, climate sustainability, etc., to achieve good results and solve the effect of crystallization blockage

Active Publication Date: 2022-07-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can effectively solve the problem of crystallization blockage in the condenser, reflux tank and connecting pipes, and ensure the continuous production of the device

Method used

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  • Butene recovery method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] like figure 1 As shown, in the raw material, by weight percentage, the butene epoxy containing α,α-dimethylbenzyl alcohol, cumene, butylene oxide and a small amount of isomers, butene and a small amount of butane In terms of weight percent, the content of α,α-dimethylbenzyl alcohol is 22%, the content of cumene is 20%, the content of butylene oxide is 12%, and the content of butene is 45.4%, The content of butane is 0.5%, the content of water is 0.1%, the freezing liquid is ethylene glycol, the amount of ethylene glycol added is 50% of the amount of water, and the proportion of post-processing or discarded butene is 0.2%.

[0036] The operating pressure of the butene recovery tower is 0.055MPaG, the operating temperature of the top of the tower is 5°C, and the operating temperature of the tower still is 116°C.

[0037]During the operation of the device, the pressure at the top of the butene recovery tower remained stable, there was no blockage of the condenser or its p...

Embodiment 2

[0039] With Example 1, the addition amount of ethylene glycol was changed, and the addition amount of ethylene glycol was 35% of the water amount.

[0040] The operating pressure of the butene recovery tower is 0.055MPaG, the operating temperature of the top of the tower is 5°C, and the operating temperature of the tower still is 116°C.

[0041] During the operation of the device, the pressure at the top of the butene recovery tower remained stable, there was no blockage of the condenser or its pipeline, and the product quality was stable. The yield of butene was 99.6%, the purity of circulating butene was 98.6%, and the yield of BO product was 99.9%.

Embodiment 3

[0043] With embodiment 1, change the addition amount of ethylene glycol, and the addition amount of ethylene glycol is 20% of the water amount.

[0044] The operating pressure of the butene recovery tower is 0.055MPaG, the operating temperature of the top of the tower is 5°C, and the operating temperature of the tower still is 116°C.

[0045] During the operation of the device, the pressure at the top of the butene recovery tower remained stable, there was no blockage of the condenser or its pipeline, and the product quality was stable. The yield of butene was 99.6%, the purity of circulating butene was 98.6%, and the yield of BO product was 99.9%.

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Abstract

The invention relates to a butene recovery method for producing butylene oxide. In the invention, the butene epoxidation reaction product is decompressed and directly enters the gas-liquid separation tank, the gas and the liquid phase are respectively entered from below and above the feed plate of the butene recovery tower, and the top gas of the butene recovery tower is mixed with the antifreeze liquid After that, it is sent to the condenser, which can effectively solve the crystallization blockage of the condenser, the reflux tank and the connecting pipeline, realize the continuous and safe production of the device, and can be used in the industrial production of butene recovery in the butylene oxide plant.

Description

technical field [0001] The present invention relates to a kind of butene recovery method, in particular to the field of butylene oxide production, in particular, to a kind of butene (including 1-butene, 2-butene and isobutene) and cumene hydrogen peroxide (CHP) or ethylbenzene hydroperoxide (EBHP) to produce butylene oxide. Background technique [0002] Butylene oxide (BO for short) is a homologue of ethylene oxide (EO) and butylene oxide (PO), and the molecular formula is C 4 H 8 O (CAS No.: 106-88-7) is a substance with a three-membered ring structure and active chemical properties. It is mainly used as an intermediate for polyether polyol monomers and other synthetic materials. BO can also be used to make foamed plastics, synthetic rubber, non-ionic surfactants, polyether pore openers, high-end lubricant additives, etc. It can also replace acetone as a diluent for nitro paint, and can also be used as a standard for chromatographic analysis. substance. [0003] Polyeth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/08C07C11/09C07C7/09C07D303/04
CPCY02P20/10
Inventor 胡松李晗李兆奇杨卫胜
Owner CHINA PETROLEUM & CHEM CORP
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