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Process for separating methylisobutanone synthesized from acetone

A technology for the separation of methyl isobutyl ketone and its separation method, which is applied in the separation field of synthesizing methyl isobutyl ketone from acetone, can solve the problems of high consumption of raw material acetone, achieve the effects of improving competitiveness, reducing consumption, and reducing production costs

Active Publication Date: 2008-08-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] The object of the present invention is to, for the acetone in the 2-methylpentane / acetone azeotrope in the prior art is not recycled, causes the problem that raw material acetone consumes high, provides a kind of improved product separation method, to reduce the acetone Consumption, thereby reducing the production cost of the product

Method used

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  • Process for separating methylisobutanone synthesized from acetone
  • Process for separating methylisobutanone synthesized from acetone
  • Process for separating methylisobutanone synthesized from acetone

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Experimental program
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Embodiment 1

[0036] The flow adopted in the embodiment is the flow introduced in the second scheme.

[0037] 1, the situation of the raw material used in embodiment

[0038] Table 1 is composed of raw materials sent from the reaction system to the separation system.

[0039] Table 1 Raw material composition

[0040] name

Composition, wt%

h 2 o

5.76

2-MPA

0.35

AC

63.04

MIBK

29.00

DAA

0.25

DIBK

1.10

TMB

0.50

[0041] 2. Introduction to the process

[0042] The material coming from the reaction system first enters the 2-methylpentane tower 1,2-methylpentane and acetone are azeotroped, and the 2-methylpentane is steamed from the top of the tower in the form of an azeotrope (column 1 under normal pressure The azeotrope theoretical composition is 56wt% 2-methylpentane and 44wt% acetone; in experimental operation, the azeotrope composition is 25wt% 2-methylpentane and 75wt% acetone)...

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Abstract

The invention discloses a separating method of methyl isobutyl ketone synthesized by acetone, which is characterized by the following: increasing acetone extracting and recycling step based on four-tower flow path; recycling acetone in the 2-methyl pantane / acetone azeotropic material; reducing the consumption of acetone and manufacturing cost; improving product competitive power and economic benefit.

Description

technical field [0001] The invention relates to a separation method for synthesizing methyl isobutyl ketone (MIBK) from acetone (AC). The method has the characteristics of high recovery rate of acetone and low unit consumption of raw materials. Background technique [0002] Methyl isobutyl ketone (abbreviated as MIBK) is an excellent solvent with a medium boiling point. It is an important derivative of acetone and is widely used in oil refining and chemical industry. [0003] The traditional production method of MIBK is the acetone three-step method. That is, in the first step, two molecules of acetone generate a molecule of diacetone alcohol (DAA) under the action of an alkaline catalyst; in the second step, a molecule of DAA is dehydrated to generate mesityl oxide (MO) under the action of an acidic catalyst; in the third step, MO generates MIBK under the action of selective hydrogenation catalyst. Concrete reaction formula is as follows: [0004] Step 1: 2CH 3 COCH 3 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C45/61C07C45/81
Inventor 艾抚宾郭长新宋丽芝王海波王春梅勾连科马皓佟明友许良侯学伟张淑梅
Owner CHINA PETROLEUM & CHEM CORP
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