Production method of polymer-grade straight-chain olefin

A technology of linear olefins and production methods, which is applied in the production field of polymer grade linear olefins, can solve the problems of high energy consumption, difficult recovery, large solvent consumption, etc., and achieve low energy consumption, high yield and high purity Effect

Active Publication Date: 2020-09-11
INNER MONGOLIA YITAI COAL BASED NEW MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The olefins obtained by this method have a single carbon number, and the basic method used is extractive distillation, which has high energy consumption, large solvent consumption, and high production costs.
[0007] The separation process in the above technical documents all adopts the traditional extractive distillation process. Since the difference between the boiling points of α-olefins and impurities (isomeric olefins) is extremely small, the cost of separation by extractive distillation process is very high, the amount of solvent used is large and the recovery is difficult. Does not meet the needs of current social development

Method used

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  • Production method of polymer-grade straight-chain olefin
  • Production method of polymer-grade straight-chain olefin
  • Production method of polymer-grade straight-chain olefin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The target carbon number is 9, after deacidification, fraction cutting and deoxygenation treatment, the first step of alkane separation is carried out by using a composite membrane, in which polyethersulfone ketone is used as the base membrane, with an average pore diameter of 300nm, and the coating material For ethylene glycol, at an operating temperature of 50°C, a pressure of 0.8MPa, and a separation time of 24h, the separated olefin content is not less than 95wt%, and the oxygen-containing compound is not more than 1ppm.

[0063] Then through the first simulated moving bed for the second step of alkane separation, the operating conditions: temperature is 60℃, pressure is 0.5MPa, adsorbent is 4A molecular sieve, mass agent-oil ratio is 2:1, and the separated olefin content is not less than 99.7 wt%.

[0064] The second simulated moving bed is used for isomer separation. The operating conditions are: temperature is 60°C, pressure is 0.5MPa, adsorbent is 10X molecular sieve...

Embodiment 2-10

[0066] The processing methods of Examples 2-10 are basically the same, and the operating parameters are slightly different. The relevant step parameters are shown in Table 4.

[0067] Table 4 Example 2-10 Target olefin carbon number and process parameters

[0068]

[0069]

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Abstract

The invention provides a method for separating polymer-grade straight-chain olefin from a material flow containing alkene. The method comprises the following steps: by taking coal-based Fischer-Tropsch synthetic oil as a raw material, performing deacidification, fraction cutting, oxygen-containing compound removal, membrane module alkene separation, simulated moving bed alkene separation and isomer separation, and adsorption drying treatment on the raw material, thereby obtaining the polymer-grade straight-chain olefin product, wherein the carbon number N of the target olefin is 9-18. Comparedwith traditional rectification and extraction processes, the method of the invention has the following advantages: the product obtained by the method is higher in purity, higher in yield and lower inenergy consumption, and the production cost is remarkably reduced.

Description

Technical field [0001] The invention relates to a method for producing polymer-grade linear olefins, in particular to a method for producing polymer-grade linear olefins by combining a composite membrane and a simulated moving bed. Background technique [0002] Fischer-Tropsch synthetic oil products contain a large amount of valuable chemical raw materials-olefins, olefins are the key raw materials for the production of other fine chemical products, and have an extremely significant impact on their downstream industries. [0003] At present, the subsequent processing methods for Fischer-Tropsch synthetic oil products at home and abroad mainly focus on distillation and rectification. [0004] Patents US7217852 and US7294253 propose a method for the distillation of Fischer-Tropsch synthetic oils and the middle distillate oil obtained by distillation. The middle distillate oil contains branched chains such as methyl, ethyl, and propyl, and C9~C16 components account for the total More t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/06
CPCC10G53/06
Inventor 李俊诚钱震武靖为张晓龙菅青娥高源邬学霆陈浩庭
Owner INNER MONGOLIA YITAI COAL BASED NEW MATERIALS RES INST CO LTD
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