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Method for producing tert-butanol by hydration of isobutene in mixed n-butane

A technology for hydrating and mixing C4 in isobutene, applied in chemical instruments and methods, preparation of organic compounds, preparation of hydroxyl compounds, etc., can solve the problems of low isobutene conversion rate, low mutual solubility, etc., to reduce separation energy consumption, improve Reaction rate, effect of reducing production cost

Active Publication Date: 2019-05-31
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no report has been found on the application of reactive distillation process in the production of tert-butanol
[0005] In addition, due to the isobutene hydration reaction system, the mutual solubility of isobutene and water is extremely low, thus resulting in a relatively low conversion rate of isobutene

Method used

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  • Method for producing tert-butanol by hydration of isobutene in mixed n-butane
  • Method for producing tert-butanol by hydration of isobutene in mixed n-butane
  • Method for producing tert-butanol by hydration of isobutene in mixed n-butane

Examples

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Effect test

Embodiment 1

[0035] Add a mass fraction of 40% tert-butanol, 50% dioxane, and 10% water to the reactor of the reactive distillation tower to reach 70% of the liquid level in the tower reactor, add a certain amount of zeolite to prevent bumping, and heat the tower reactor. Control the heating power of the reactor of the reaction distillation tower to 5.4kW, and turn on the heat preservation switch of the tower body, control the pressure inside the tower to 0.5MPa, and start feeding when the temperature of the tower reactor reaches 98°C, and the total water feeding amount is 15mol / h , the feed rate of the total mixed carbon four is 26mol / h, wherein the isobutene is 10mol / h, the feed rate of dioxane is 10mol / h, and the feed temperature is room temperature. Until the reactive distillation column starts to reflux, stop the feed, and return to the total for about 30 minutes, then mix C4, water and dioxane to feed again. The reflux ratio of the reactive distillation tower is 5, and the production...

Embodiment 2

[0043]Add a mass fraction of 40% tert-butanol, 50% dioxane, and 10% water to the reactor of the reactive distillation tower to reach 70% of the liquid level in the tower reactor, add a certain amount of zeolite to prevent bumping, and heat the tower reactor. Control the heating power of the reactor of the reaction distillation tower to 5.4kW, and turn on the heat preservation switch of the tower body, control the pressure inside the tower to 0.5MPa, and start feeding when the temperature of the tower reactor reaches 98°C, and the total water feeding amount is 20mol / h , the feed rate of the total mixed carbon four is 26mol / h, wherein the isobutene is 10mol / h, the feed rate of dioxane is 10mol / h, and the feed temperature is room temperature. Until the reactive distillation column starts to reflux, stop the feed, and return to the total for about 30 minutes, then mix C4, water and dioxane to feed again. The reflux ratio of the reactive distillation tower is 5, and the output is 2...

Embodiment 3

[0051] Add a mass fraction of 40% tert-butanol, 50% dioxane, and 10% water to the reactor of the reactive distillation tower to reach 70% of the liquid level in the tower reactor, add a certain amount of zeolite to prevent bumping, and heat the tower reactor. Control the heating power of the reactor of the reaction distillation tower to 5.4kW, and turn on the heat preservation switch of the tower body, control the pressure inside the tower to 0.5MPa, and start feeding when the temperature of the tower reactor reaches 98°C, and the total water feeding amount is 15mol / h , the feed rate of the total mixed carbon four is 26mol / h, wherein the isobutene is 10mol / h, the feed rate of dioxane is 10mol / h, and the feed temperature is room temperature. Until the reactive distillation column starts to reflux, stop the feed, and return to the total for about 30 minutes, then mix C4, water and dioxane to feed again. The reflux ratio of the reactive distillation tower is 6, and the production...

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Abstract

The invention relates to the field of chemical industry, in particular to a method for producing tert-butanol by hydration of isobutene in mixed n-butane. Under the action of dioxane as a co-solvent,mixed n-butane reacts with water in a reaction section of a reactive distillation column. The method adopts a double-effect distillation model, tert-butanol generated in the reaction, remaining waterand dioxane are taken out from a tower kettle of the reactive distillation column, and the materials discharged from the tower kettle of the reactive distillation column serve as heat sources of reboilers I and II of a tert-butanol refining tower and enter the tert-butanol refining tower for further separation after heat exchange. The catalytic reactive distillation process with dioxane as the co-solvent is introduced, the conversion of isobutene is improved, the problems are solved that an original reaction and distillation process is complex, high in energy consumption and low in yield, andthe method has broad market application prospects.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for producing tert-butanol by hydrating isobutene in mixed C4. Background technique [0002] Catalytic cracking units, ethylene cracking units and aromatics reforming units of petrochemical enterprises all by-produce a considerable amount of C4 hydrocarbons, among which butane, butene and butadiene are important organic chemical raw materials. The content of effective components in mixed C4 is as high as 95%, and its value can be increased by 2 to 3 times if it is separated. However, only a small number of enterprises in China use a small part of it, mainly selling it as civil liquefied gas, wasting valuable resources such as high-value butadiene, n-butene, and isobutene. In recent years, with the rapid increase of crude oil processing capacity and ethylene production capacity of various petrochemical enterprises, the problem of effective utilization of C4 hydrocarbon r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/04C07C29/80C07C31/12B01D3/14B01J19/00
CPCY02P20/10
Inventor 田晖孙大海胡明圆许文友任万忠陈小平
Owner YANTAI UNIV
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