Extractive distillation process

A technology of extraction and liquid extractant, applied in the field of extractive distillation, can solve problems such as ineffectiveness and difficulty in separation

Inactive Publication Date: 2016-03-30
BLUE CUBE IP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is obvious to the skilled person that an extractant suitable for separating butenes from butanes is not effective in separating DVB from EVB because DVB and EVB are very similar in structure; and this similarity makes It is difficult to separate the two compounds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] In this example 1, several laboratory experiments were performed, including providing a mixture of extractant, DEB, EVB, and DVB; and boiling the mixture in a single-stage vapor-liquid equilibrium (VLE) under vacuum while still measuring at equilibrium The vapor and liquid composition in the state and determine the resulting relative volatility of the components in the mixture. These relative volatility were compared with the relative volatility obtained from similar experiments using a mixture of DEB, EVB, and DVB in the absence of the extractant to determine the degree of enhancement caused by the use of the extractant. The results of these experiments are described in Table I-VI below:

[0075] Table I-DEB / EVB / DVBVLE results-no extractant

[0076]

[0077] Table II-DEB / EVB / DVB relative volatility calculation results-no extractant

[0078]

[0079] Table III-Sulfolane 1.5 for 1DEB / EVB / DVBVLE results

[0080]

[0081]

[0082] Table IV-Calculation results of relative vol...

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Abstract

A process for extracting divinylarene from a composition mixture stream comprising at least an ethylvinylarene and at least a divinylarene, the process comprising the steps of: (a) contacting a composition mixture stream comprising at least an ethylvinylarene and at least a divinylarene with a liquid extractive agent such that at least a portion of the divinylarene present in the composition mixture is extracted into the liquid extractive agent; and (b) recovering at least a portion of the divinylarene extracted from the ethylvinylarene stream to form a divinylarene product stream; wherein the divinylarene product stream contains at least 50 weight percent divinylarene; and an apparatus for extracting divinylarene from the composition mixture stream.

Description

Technical field [0001] The present invention relates to an extractive distillation method and device; and more specifically, to an extraction method for removing divinyl aromatic hydrocarbons from ethyl vinyl aromatic hydrocarbons or separating divinyl aromatic hydrocarbons from ethyl vinyl aromatic hydrocarbons Distillation method and device. Background technique [0002] Divinylarene such as divinylbenzene (DVB) is an important raw material for the production of other important downstream products. Downstream products made from, for example, divinylarene (such as DVB) are beneficially used in many applications including, for example, coatings, composites, laminates, and adhesives. [0003] As discussed further below, generally during the production of DVB, the crude DVB material must be subjected to a separation process, and the current conventional distillation process is implemented as a separation process in the art, so that the desired DVB product may be present in the crude...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/08C07C15/44
CPCC07C7/08C07C15/44B01D3/40
Inventor B·S·霍尔登J·M·克罗思韦特R·M·坎贝尔
Owner BLUE CUBE IP
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