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Production technology for cracking butyl octanol residual liquid into C4 and C8 by means of alkaline liquid cracking agent

A production process and cracking agent technology, applied in cracking, petroleum industry, non-catalytic thermal cracking, etc., can solve the problems of environmental damage, waste of resources, etc., and achieve the effects of environmental protection, emission reduction, and high content of useful components

Active Publication Date: 2010-11-24
山东瑞利尔石油装备有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the global scope, in the production process of butanol and octanol in petrochemical enterprises, the raffinate of butanol and octanol discharged from the butanol plant contains a large amount of C12~C16 components produced by polymerization, but the existing domestic equipment cannot be reasonably Utilizing this resource can only be treated as sewage, which not only wastes a lot of resources, but also causes damage to the environment.

Method used

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  • Production technology for cracking butyl octanol residual liquid into C4 and C8 by means of alkaline liquid cracking agent
  • Production technology for cracking butyl octanol residual liquid into C4 and C8 by means of alkaline liquid cracking agent

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Effect test

Embodiment 1

[0015] The quality composition of alkaline liquid cracking agent is: sodium hydroxide 15%, potassium hydroxide 30%, water 20%, isopropanol 12%, ethylene glycol 7%, potassium permanganate 6%, ethanol 8%, nitric acid Barium 1%, boron trioxide 1%.

[0016] The main composition of butanol raffinate: 0.7% for C4, 0.8% for C8, and 98.5% for heavy components (C12 and C16).

[0017] When the feed rate of butyl octanol raffinate accounted for 50% of still volume, the add-on of alkaline liquid cracking agent was 0.5% of raw material quality, 150 ℃ of preheater temperature, tower still temperature was 220 ℃, and tower top temperature was 150°C, the pressure at the top of the tower is -0.08Mpa. The components extracted at the top of the tower account for 80% of the mass of the butanol raffinate, the output of C4 accounts for 42% of the mass of the components extracted at the top of the tower, and the output of C8 accounts for 51% of the mass of the components extracted at the top of the ...

Embodiment 2

[0019] The mass composition of alkaline liquid cracking agent is: sodium hydroxide 5%, potassium hydroxide 10%, water 30%, isopropanol 15%, ethylene glycol 10%, potassium permanganate 10%, ethanol 10%, nitric acid Barium 5%, diboron trioxide 5%.

[0020] The main composition of butanol raffinate: C4 is 0.5%, C8 is 0.9%, and heavy components (C12 and C16) are 98.6%.

[0021] When the feed rate of butanol raffinate accounted for 60% of the still volume, the add-on of alkaline liquid cracking agent was 0.6% of the raw material amount, the preheater temperature was 180°C, the tower still temperature was 240°C, and the tower top temperature It is 170°C, and the pressure at the top of the tower is -0.09Mpa. The components extracted at the top of the tower account for 76% of the mass of the butanol raffinate, the output of C4 accounts for 41% of the mass of the components extracted at the top of the tower, and the output of C8 accounts for 53% of the mass of the components extracted...

Embodiment 3

[0023] The mass composition of alkaline liquid cracking agent is: sodium hydroxide 10%, potassium hydroxide 25%, water 25%, isopropanol 10%, ethylene glycol 8%, potassium permanganate 8%, ethanol 7%, nitric acid Barium 4%, boron trioxide 3%.

[0024] The main composition of butanol raffinate: 0.4% for C4, 0.8% for C8, and 98.8% for heavy components (C12 and C16).

[0025] When the feed rate of butanol raffinate accounted for 70% of the still volume, the add-on of alkaline liquid cracking agent was 0.7% of the raw material amount, the preheater temperature was 200°C, the tower still temperature was 260°C, and the tower top temperature It is 185°C, and the pressure at the top of the tower is -0.1Mpa. The extracted component at the top of the tower accounts for 74% of the mass of the butanol raffinate, the output of C4 accounts for 39% of the mass of the extracted component at the top of the tower, and the output of C8 accounts for 54% of the mass of the extracted component at t...

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Abstract

The invention relates to production technology for cracking butyl octanol residual liquid into C4 and C8 by means of an alkaline liquid cracking agent. The technology is characterized by comprising the following steps of: preparing the alkaline liquid cracking agent, wherein the alkaline liquid cracking agent consists of sodium hydroxide, potassium hydroxide, water, isopropanol, ethylene glycol, potassium permanganate, ethanol, barium nitrate and diboron trioxide; preheating the alkaline liquid cracking agent and the butyl octanol residual liquid through a preheater and adding into a distilling still, wherein the tower bottom temperature of the distilling still is between 200 and 280 DEG C, the tower top temperature is between 130 and 190 DEG C, and the tower top pressure is between 0.08 and 0.1Mpa below zero; and extracting the C4 and C8 generated by cracking from the tower top of the distilling still, pumping the C4 and C8 into a fractionating column at the downstream for fractionation, and extracting a small amount of uncracked heavy components from a tower bottom pump. The production technology has the advantages of high production capacity, high cracking selectivity, high content of the cracked useful components, low cost, simple process, and batch distillation or continuous distillation.

Description

technical field [0001] The invention relates to a production process for cracking butanol-octanol raffinate into C4 and C8 under an alkaline liquid cracking agent, which belongs to the field of petrochemical industry. Background technique [0002] At present, in the global scope, in the production process of butanol and octanol in petrochemical enterprises, the raffinate of butanol and octanol discharged from the butanol plant contains a large amount of C12~C16 components due to polymerization, but the existing domestic devices cannot be reasonably Utilizing this resource can only be treated as sewage, which not only wastes a lot of resources, but also causes damage to the environment. If this part of butyl-octanol raffinate is recycled, it can not only reduce environmental pollution, but also crack C4 and C8 components with high value, which has great social and economic benefits. Contents of the invention [0003] According to the deficiencies in the prior art above, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G9/34
Inventor 杨保利
Owner 山东瑞利尔石油装备有限责任公司
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