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Refining device of propylene epoxide

A technology of propylene oxide and refining equipment, which is applied in the direction of organic chemistry, can solve the problems of high loss rate of extraction agent and low recovery rate of propylene oxide, and achieve good technical effects

Pending Publication Date: 2017-10-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the prior art has the problems of low recovery rate of propylene oxide and high loss rate of extractant, and a new refining device for propylene oxide is provided

Method used

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  • Refining device of propylene epoxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] use figure 1 The device shown contains water, methanol, acetaldehyde, propionaldehyde, acetone, methyl formate, C 5 -C 6 The crude propylene oxide (stream 1) composition of hydrocarbon impurities is shown in Table 1.

[0034] Table 1

[0035] composition

[0036] The flow rate of stream 1 is 10000kg / h, reacts with stream 2 sodium hydroxide solution in the first mixer M1, methyl formate undergoes saponification reaction to generate methyl alcohol and sodium formate, after the reaction, the solution reacts with stream 3 hydrazine solution in the second mixer M2, Carbonyl compounds such as acetaldehyde, propionaldehyde, and acetone are reduced to produce hydrazone heavy components and water. After the reaction, the solution enters the upper part of the T1 tower. The number of theoretical plates in the T1 column is 80, the feed position of logistics 6 is the 40th plate, the feed position of the first extraction agent deionized water is the 20th plate, the opera...

Embodiment 2

[0042] use figure 1 The device shown contains water, methanol, acetaldehyde, propionaldehyde, acetone, methyl formate, C 5 -C 6 The composition of the crude propylene oxide solution (stream 1) of impurities such as hydrocarbons is shown in Table 3.

[0043] table 3

[0044] composition

[0045] The flow rate of stream 1 is 10000kg / h, reacts with stream 2 sodium hydroxide solution in the first mixer M1, methyl formate undergoes saponification reaction to generate methyl alcohol and sodium formate, after the reaction, the solution reacts with stream 3 hydrazine solution in the second mixer M2, Carbonyl compounds such as acetaldehyde, propionaldehyde, and acetone are reduced to produce hydrazone heavy components and water. After the reaction, the solution enters the upper part of the T1 tower. The theoretical plate number of T1 tower is 60, the feeding position of stream 6 is the 30th plate, the feeding position of the first extraction agent deionized water is the 15...

Embodiment 3

[0051] use figure 1 The device shown contains water, methanol, acetaldehyde, propionaldehyde, acetone, methyl formate, C 5 -C 6 The composition of the crude propylene oxide solution (stream 1) of impurities such as hydrocarbons is shown in Table 5.

[0052] table 5

[0053] composition

[0054] The flow rate of stream 1 is 10000kg / h, reacts with stream 2 sodium hydroxide solution in the first mixer M1, methyl formate undergoes saponification reaction to produce methyl alcohol and sodium formate, after the reaction, the solution reacts with stream 3 hydrazine solution in the second mixer M2, Carbonyl compounds such as acetaldehyde, propionaldehyde, and acetone are reduced to produce hydrazone heavy components and water. After the reaction, the solution enters the upper part of the T1 tower. The number of theoretical plates in the T1 column is 70, the feed position of stream 6 is the 32nd plate, the feed position of the first extraction agent deionized water / de-salt...

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Abstract

The invention relates to a refining device of propylene epoxide, and mainly solves the problems of low propylene epoxide recovery rate and high extraction agent loss rate in the prior art. The device has the technical scheme that the device comprises (a) a first mixer, (b) a second mixer, (c) a first extraction rectification tower, and (d) a second extraction rectification tower, wherein the first mixer is used for enabling coarse propylene epoxide containing impurities to be in contact with aqueous alkali to obtain a first material flow; the second mixer is used for enabling the first material flow to be in contact with hydrazine or hydrazine hydrate to obtain a second material flow; the first extraction rectification tower is used for enabling the second material flow with a first extraction agent to perform extraction rectification; after the separation, a first light ingredient material flow is obtained at the tower top; a first heavy ingredient material flow is obtained at a tower kettle; the second extraction rectification tower is used for enabling the first light ingredient material flow to be in contact with the second extraction agent for extraction rectification; after the separation, a second light ingredient material flow containing a propylene epoxide product is obtained at the tower top; a second heavy ingredient material flow is obtained at the tower kettle. The problem is well solved; the refining device can be used for the industrial production for the propylene epoxide refining.

Description

technical field [0001] The invention relates to a refining device for propylene oxide. Background technique [0002] Propylene oxide is an important organic compound raw material, mainly used in the production of polyether polyol, propylene glycol and various nonionic surfactants, among which polyether polyol is used in the production of polyurethane foam, insulation materials, elastomers, adhesives and coatings, etc. Various nonionic surfactants are widely used in petroleum, chemical, pesticide, textile, daily chemical and other industries. However, only propylene oxide with higher purity can be used to manufacture polypolyols, so the crude propylene oxide product can be purified before it can be used in the preparation of polypolyols. Cumene hydroperoxide (CHP) and ethylbenzene hydrogen peroxide (EBHP) react with propylene to obtain the target product propylene oxide under the action of epoxides, and also generate water, methanol, acetaldehyde, acetone, and formic acid E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D301/32C07D303/04
CPCC07D301/32C07D303/04
Inventor 辜乌根杨卫胜胡松
Owner CHINA PETROLEUM & CHEM CORP
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