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Butylene recycling 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: 2019-05-14
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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  • Butylene recycling method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 As shown, among the raw materials, in terms of weight percent, butene epoxy containing α,α-dimethylbenzyl alcohol, cumene, butylene oxide and a small amount of isomers, butene and a small amount of butane 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% in percent by weight. The content of butane is 0.5%, the content of water is 0.1%, the freezing liquid is ethylene glycol, the addition amount of ethylene glycol is 50% of the water amount, and the proportion of post-treatment or discarded butene is 0.2%.

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

[0037]During the operation of the device, the pressure at the top of the butene recovery tower remains stable, no condenser or pipe blockage occurs, ...

Embodiment 2

[0039] With embodiment 1, change the add-on of ethylene glycol, the add-on of ethylene glycol is 35% of water yield.

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

[0041] During the operation of the device, the pressure at the top of the butene recovery tower remains stable, no condenser or pipe blockage occurs, the product quality is stable, the yield of butene is 99.6%, the purity of circulating butene is 98.6%, and the yield of BO product is 99.6%. 99.9%.

Embodiment 3

[0043] With embodiment 1, change the add-on of ethylene glycol, ethylene glycol add-on is 20% of water yield.

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

[0045] During the operation of the device, the pressure at the top of the butene recovery tower remains stable, no condenser or pipe blockage occurs, the product quality is stable, the yield of butene is 99.6%, the purity of circulating butene is 98.6%, and the yield of BO product is 99.6%. 99.9%.

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Abstract

The invention relates to butylene recycling method of epoxybutane production. The butylene recycling method has the advantages that the butylene epoxidation reaction product is subjected to pressure reduction and then directly fed into a gas-liquid separation tank, the gas phase and the liquid phase respectively enter from the lower portion and the upper portion of a butylene recycling tower feeding plate, the overhead gas of a butylene recycling tower is mixed with an anti-freezing solution and fed into a condenser, the crystallization blocking problem of the condenser, a return tank and a connecting pipeline can be solved effectively, device continuous safety production is achieved, and the method is applicable to the industrial production using an epoxybutane device to recycle butylene.

Description

technical field [0001] The present invention relates to a butene recovery method, in particular to the field of butylene oxide production, in particular to a butene (comprising 1-butene, 2-butene and isobutene) and cumene hydroperoxide (CHP) or ethylbenzene hydroperoxide (EBHP) to produce butylene oxide. Background technique [0002] Butylene oxide (BO for short) is a homologue with ethylene oxide (EO) and butylene oxide (PO), and its molecular formula is C 4 h 8 O (CAS No.: 106-88-7), a substance with a three-membered ring structure, is chemically active and is mainly used as an intermediate for polyether polyol monomers and other synthetic materials. BO can also be used to make foam plastics, synthetic rubber, non-ionic surfactants, polyether cell openers, high-end lubricating oil 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] Polyether polyol, referred to as ...

Claims

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Application Information

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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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