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A Method for Separation of Alkenes/Alkanes Mixtures Using Immobilized Ag[tf2n] Transfer Membrane

An alkane mixture and transfer membrane technology, applied in separation methods, semi-permeable membrane separation, membrane purification/separation, etc., can solve the problems of poor stability and high energy consumption, and achieve simplified process, low energy consumption and wide application range. Effect

Active Publication Date: 2019-08-20
HENAN ZT LEAGUE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of high energy consumption and poor stability in the above-mentioned existing olefin / alkane separation methods, the present invention provides a method using immobilized Ag[Tf 2 N] transfer membrane separation method for olefin / alkane mixture

Method used

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  • A Method for Separation of Alkenes/Alkanes Mixtures Using Immobilized Ag[tf2n] Transfer Membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Take 10g PVA in a beaker, add distilled water that can completely dissolve PVA into the beaker, place the beaker on the heating furnace and heat it, after the PVA is completely dissolved, add 1.8g nano-SiO 2 Powder, stir and cool to room temperature for later use. Put Ag[Tf 2 N] solution is slowly added dropwise to the above solution to prepare a casting solution, Ag[Tf 2 The amount of N] added is 1 mol / kg. The above casting liquid was evenly coated on the ethanol-treated nano PVDF film, protected from light, and dried in vacuum for more than 8 hours to obtain a solid-loaded Ag[Tf 2 N] Transfer membrane. The prepared membrane is fixed in the middle of the membrane separator, and the raw material tank is heated at 70°C (the mole percentages of hexene and hexane in the raw materials are each 50%) to vaporize the liquid, and the steam enters the membrane chamber above the membrane. The lower membrane chamber is connected to a vacuum pump, and the vapor passing through the m...

Embodiment 2

[0025] Take 10g of PVA in a beaker, add distilled water that can completely dissolve PVA into the beaker, put the beaker on the heating furnace and heat it, after the PVA is completely dissolved, add 2g of nano-SiO 2 Powder, stir and cool to room temperature for later use. Put Ag[Tf 2 N] solution is slowly added dropwise to the above solution to prepare a casting solution, Ag[Tf 2 The amount of N] added is 0.8 mol / kg. The above casting liquid was evenly coated on the ethanol-treated nano PVDF film, protected from light, and dried in vacuum for more than 8 hours to obtain a solid-loaded Ag[Tf 2 N] Transfer membrane. The prepared membrane is fixed in the middle of the membrane separator, and the raw materials (the mole percentage of octene and octane in the raw materials are each 50%) are transported to the upper membrane chamber of the membrane with a pump. The lower membrane chamber is connected to a vacuum pump, and the vapor passing through the membrane is collected in a cold...

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Abstract

The invention relates to a method for separating an olefin / alkane mixture through a solid supported Ag[Tf2N] transmission membrane. The method comprises the steps that the solid supported Ag[Tf2N] transmission membrane is fixed in the middle of a membrane separator, the olefin / alkane mixture to be separated in a raw material tank is heated to be vaporized, vapor passing through the solid supported Ag[Tf2N] transmission membrane is collected in a cold trap, and tail gas not passing through the solid supported Ag[Tf2N] transmission membrane returns back to the raw material tank through a temperature control device, so that olefin and alkane are separated; compared with existing solid supported AgNO3, AgBF4, AgCIO4, AgPF6 and other transmission membranes, Ag[Tf2N] is adopted, so that the better stability is achieved; Ag[Tf2N] can enable olefin to generate water insoluble [Ag(olefin)x][Tf2N] ionic liquid, and the method is suitable for being implemented in a liquid phase and wide in application range; compared with a traditional low-temperature fractionation separation method, energy consumption is low, and multi-component mixing olefin / alkane separation can be achieved.

Description

Technical field [0001] The present invention relates to the technical field of olefin separation, in particular to a method of using immobilized Ag[Tf 2 N] Transfer membrane method to separate olefin / alkane mixture. Background technique [0002] Olefins and alkanes are very important basic chemical raw materials in petroleum and coal chemical industries. At present, whether it is the catalytic cracking method, low-carbon olefin oligomerization method or alkane dehydrogenation method used in the petrochemical industry, or the Fischer-Tropsch synthesis method used in the coal chemical industry, the products of olefin production are often olefin / alkane mixtures. Especially for olefins and alkanes with the same number of carbon atoms, their separation has always been a technical difficulty in the petrochemical industry due to their similar molecular structures and similar volatility. Separation by the traditional cryogenic distillation method requires high energy consumption. In ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/144B01D53/22B01D67/00
Inventor 刘振赵殿佳李龙飞刘程勾明雷段永华宋亚坤
Owner HENAN ZT LEAGUE CHEM