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Method for refining epoxypropane

A technology of propylene oxide and refining method, applied in the direction of organic chemistry, etc., can solve the problems of poor product quality and high cost of extraction agent, and achieve the effect of reducing circulation accumulation

Inactive Publication Date: 2014-11-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that due to the introduction of the medium outside the system in the prior art, there are problems of high cost of extractant and poor product quality, and a new method for refining propylene oxide is provided

Method used

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  • Method for refining epoxypropane
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  • Method for refining epoxypropane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] use figure 1 Process shown, containing water, acetaldehyde, propionaldehyde, methanol, acetone, C 3 ~C 7 The composition of stream 1 (crude propylene oxide solution) of impurities such as hydrocarbons is shown in Table 4.

[0042] Table 4

[0043] composition Content, wt acetone 0.005 Propionaldehyde 0.002 Acetaldehyde 0.001 Propylene oxide 0.988 water 0.002 C 3 ~C 7 Hydrocarbons 0.001

[0044] Stream 1 is fed from the lower part of T101 tower. Stream 3 (T101 overhead distillate) mainly contains acetaldehyde and a small amount of propylene oxide. To the outside of the system, stream 2 (T101 top non-condensable gas) mainly contains C 3 ~C 4 Hydrocarbons, acetaldehyde, to flare. The theoretical plate number of T101 column is 55, the operating pressure is 250kPa, and the reflux ratio is 200.

[0045] Stream 4 (T101 tower bottom liquid) is fed from the middle and upper part of T102 tower, T102 tower bottom liquid ...

Embodiment 2

[0055] use figure 1 Process shown, containing water, acetaldehyde, propionaldehyde, methanol, acetone, C 3 ~C 7 The composition of stream 1 (crude propylene oxide solution) of impurities such as hydrocarbons is shown in Table 6.

[0056] Table 6

[0057] composition Content, wt acetone 0.006 Propionaldehyde 0.003 Acetaldehyde 0.001 Propylene oxide 0.985 water 0.003 C 3 ~C 7 Hydrocarbons 0.002

[0058] Stream 1 is fed from the lower part of T101 tower. Stream 3 (T101 overhead distillate) mainly contains acetaldehyde and a small amount of propylene oxide. To the outside of the system, stream 2 (T101 top non-condensable gas) mainly contains C 3 ~C 4 Hydrocarbons, acetaldehyde, to flare. The theoretical plate number of T101 column is 65, the operating pressure is 230kPa, and the reflux ratio is 180.

[0059] Stream 4 (T101 tower bottom liquid) is fed from the middle and upper part of T102 tower, T102 tower bottom liquid ...

Embodiment 3

[0069] use figure 1 Process shown, containing water, acetaldehyde, propionaldehyde, methanol, acetone, C 3 ~C 7 The composition of stream 1 (crude propylene oxide solution) of impurities such as hydrocarbons is shown in Table 8.

[0070] Table 8

[0071] composition Content, wt acetone 0.005 Propionaldehyde 0.004 Acetaldehyde 0.002 Propylene oxide 0.984 water 0.003 C 3 ~C 7 Hydrocarbons 0.002

[0072] Stream 1 is fed from the lower part of T101 tower. Stream 3 (T101 overhead distillate) mainly contains acetaldehyde and a small amount of propylene oxide. To the outside of the system, stream 2 (T101 top non-condensable gas) mainly contains C 3 ~C 4 Hydrocarbons, acetaldehyde, to flare. The theoretical plate number of T101 column is 60, the operating pressure is 250kPa, and the reflux ratio is 200.

[0073] Stream 4 (T101 tower bottom liquid) is fed from the middle and upper part of T102 tower, T102 tower bottom liquid (s...

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Abstract

The invention relates to a method for refining epoxypropane and is mainly used for solving the problems of high cost of an extraction agent and poor quality of a product caused by introduction of an outside-of-system medium existing in the prior art. The method for refining epoxypropane disclosed by the invention comprises the following steps of: by virtue of an extraction agent, extracting the crude epoxypropane solution obtained by reacting hydrogen peroxide ethylbenzene with propylene and containing epoxypropane, water, acetaldehyde, propionaldehyde, methanol, acetone and C3-C7 hydrocarbon impurities and distilling. The problem is well solved by the technical scheme that ethylbenzene is adopted as the extraction agent; the method can be used in the industrial production of refining epoxypropane.

Description

technical field [0001] The invention relates to a method for refining propylene oxide. Background technique [0002] Propylene oxide is an important organic compound raw material and the third largest propylene derivative after polypropylene and acrylonitrile. Propylene oxide is mainly used in the production of polyether polyols, propylene glycol and various nonionic surfactants, among which polyether polyols are important raw materials for the production of polyurethane foams, insulation materials, elastomers, adhesives and coatings, etc. Ionic 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. The conditions required for the polymerization of propylene oxide not only require the purity of propylene oxide to reach 99.9w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/04C07D301/32
CPCC07D301/32C07D303/04
Inventor 胡松杨卫胜施德
Owner CHINA PETROLEUM & CHEM CORP
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