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Separation method for oligomerization products of 1,3-butadiene ring

A technology of reaction products and separation methods, used in distillation purification/separation, organic chemistry, etc.

Inactive Publication Date: 2013-08-28
李明泉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the technical problem of separating and recovering useful substances from the residue of 1,3-butadiene ring oligomerization reaction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example

[0047] In the following example, the residue after distillation for the preparation of cyclododecatriene was added to 300ml of extractant, and extracted under reflux for 45 minutes at a temperature of 115°C and a pressure of 0.01mpa. The mixture was then cooled to 5°C or 20°C, allowed to settle statically for 12 hours, and then filtered. The filtrate is the extractant and high boiling point substances, the filter cake is polybutadiene, and the weight of the filtrate and the filter cake is weighed. The difference in starting and final weights was due to a small amount of residue adhering to the experimental equipment.

[0048] Example of distillation:

[0049] In the extraction example, 205 g of the filtrate was placed in a 500 ml distillation bottle, and passed through a rectification tower with a height of 1.5 m and an internal diameter of 0.05 m under vacuum distillation. The following materials were isolated at different temperatures and pressures.

[0050] Distillation ...

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Abstract

The invention brings forward a separation method for oligomerization products of 1,3-butadiene ring. The method comprises steps of adding an extractant into residues, distilling, fractionating distillate, cooling and settling residual oily substances, and filtering and separating crystal substances, so that an oil liquid of C16-C32 isomer substances, petroleum ether and a 2-butanone mixed solvent extractant are separated from residue distillation ingredients generated in a synthesis of cyclododecatriene, thereby obtaining 1,3-butadiene, cyclododecatriene, cyclooctadiene and vinyl cyclohexene substances. According to the invention, the method can separate the oligomerization products of the 1,3-butadiene ring, and obtain useful substances used for reusing or receiving valuable compounds, thereby reducing discharge, eliminating pollution, protecting the environment, and conserving resources, and being suitable as a method for processing the oligomerization products of the 1,3-butadiene ring.

Description

technical field [0001] The invention relates to a method for separating high boiling point substances. Specifically, it is a method for the separation of components contained in distillation residues produced in the synthesis of cyclododecatriene. Specifically, it is a method for separating 1,3-butadiene ring oligomerization reaction products. Background technique [0002] The industrial implementation of 1,3-butadiene ring oligomerization is usually completed in transition metal compounds or transition metal complex salts. Catalysts used are typically transition metal compounds and alkyl metal halides, preferably TiX 4 and AlR y Z y-3 for a specific set of combinations. Wherein X is independently equal to F, Cl, Br, I, Z is a halogeno group, R is an alkyl group, and 0<y≤3. Depending on the catalyst system, at least one organic compound or alkyl sulfoxide compound containing elements of the fifth main group of the periodic table of chemical elements must also be add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/08C07C13/277C07C13/263C07C13/20C08F136/06
Inventor 李明泉李翔邹鹏博于桂华
Owner 李明泉
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