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Formate tubular hybrid membrane for arene/alkane separation, and preparation method and application of formate tubular hybrid membrane

A formate and hybrid membrane technology, applied in the field of membrane separation, can solve problems such as stability problems, poor thermal stability, etc., and achieve the effects of good separation effect and stability, improved swelling resistance, and simple method.

Active Publication Date: 2016-02-03
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although polymer membranes have excellent film-forming properties, their thermal stability is poor, especially when separating organic / organic systems. The stability of polymer membranes has hampered its industrialization.

Method used

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  • Formate tubular hybrid membrane for arene/alkane separation, and preparation method and application of formate tubular hybrid membrane

Examples

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Embodiment 1

[0030] Aluminum oxide (Al 2 o 3 ) material, in the form of a tubular ultrafiltration membrane with a membrane pore size of 0.1-0.2 μm and a membrane area of ​​28 cm 2 , the silane coupling agent used in the pretreatment is 3-aminopropyl-trimethoxysilane, the polymer with amide bonds used is polyether copolyamide (PEBA2533), and the metal source is cobalt carbonate (CoCO 3 , the molecular weight is 118.94), the organic ligand is formic acid (HCOOH, the molecular weight is 46.03), and the solvent of polyether copolyamide is n-butanol.

[0031] Preparation conditions and methods:

[0032] (1) Preparation of Co(HCOO) by solvothermal method 2 2H 2 O. (Weigh 3g of cobalt carbonate and add it to 10ml of water, then add 50ml of formic acid solution dropwise to the above reaction solution, stir and react for 6h while adding dropwise, centrifuge for 1h to obtain the lower layer of precipitation, vacuum dry to obtain pink powdery crystals, fully grind , the particle size is about 3...

Embodiment 2

[0043] Aluminum oxide (Al 2 o 3 ) material, in the form of a tubular ultrafiltration membrane with a membrane pore size of 0.1-0.2 μm and a membrane area of ​​28 cm 2 , the silane coupling agent used in the pretreatment is 3-aminopropyl-trimethoxysilane, the polymer with amide bonds used is polyether copolyamide (PEBA2533), and the metal source is cobalt carbonate (CoCO 3 , the molecular weight is 118.94), the organic ligand is formic acid (HCOOH, the molecular weight is 46.03), and the solvent of polyether copolyamide is n-butanol.

[0044] Preparation conditions and methods:

[0045] (1) Preparation of Co(HCOO) by solvothermal method 2 2H 2 O. (weigh 3g of cobalt carbonate and add it to 10ml of water, then add 50ml of formic acid solution dropwise to the above reaction solution, stir and react at room temperature for 6h, centrifuge for 1h to obtain the lower layer of precipitation, vacuum dry to obtain pink powdery crystals, grind, particle size about 300nm.)

[0046]...

Embodiment 3

[0057] Aluminum oxide (Al 2 o 3 ) material, in the form of a tubular ultrafiltration membrane with a membrane pore size of 0.1-0.2 μm and a membrane area of ​​28 cm 2 , the silane coupling agent used in the pretreatment is 3-aminopropyl-trimethoxysilane, the polymer with amide bonds used is polyether copolyamide (PEBA2533), and the metal source is cobalt carbonate (CoCO 3 , the molecular weight is 118.94), the organic ligand is formic acid (HCOOH, the molecular weight is 46.03), and the solvent of polyether copolyamide is n-butanol.

[0058] Preparation conditions and methods:

[0059] (1) Preparation of Co(HCOO) by solvothermal method 2 2H 2 O. (weigh 3g of cobalt carbonate and add it to 10ml of water, then add 50ml of formic acid solution dropwise to the above reaction solution, stir and react at room temperature for 6h, centrifuge for 1h to obtain the lower layer of precipitation, vacuum dry to obtain pink powdery crystals, grind, particle size about 300nm.)

[0060]...

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Abstract

The invention provides a formate tubular hybrid membrane for arene / alkane separation, and a preparation method and application of the formate tubular hybrid membrane, and belongs to the technical field of membrane separation. The preparation method comprises the following steps: preparing formate particles with appropriate particle diameters by the solvothermal method; preparing a formate / polymer membrane fluid by the blending method, performing ultrasonic dispersion, and leaving to stand for defoaming; compounding a formate / polymer separating layer on the outer surface of a perforated tube ceramic membrane modified by a silane coupling agent via the negative-pressure cross-flow filtration method; performing vacuum drying of a hybrid membrane at 30-120 DEG C for 0.1-4 h to enhance the stability of the separating layer, and repeatedly filtering to prepare a multilayer membrane. The novel preparation method is low in cost and simple to operate; the prepared hybrid membrane is excellent in pervaporation and relatively high in permeation flux and has the advantage that the mechanical strength is improved to a relatively great extent.

Description

technical field [0001] The invention relates to a preparation method of a formate tubular hybrid membrane used for the separation of aromatic hydrocarbons / alkanes, and belongs to the technical field of membrane separation. Background technique [0002] The petrochemical industry is the pillar industry of the national economy. With the rapid development of my country's economy, the petrochemical industry is also in a period of rapid growth, and the demand for ethylene will also reach unprecedented prosperity. Naphtha is the main raw material for ethylene cracking, which is composed of C 4 -C 12 Aliphatic hydrocarbons, branched aliphatic hydrocarbons and aromatic hydrocarbons. During the cracking process, the aromatic components are difficult to convert into olefins, and contribute little to the olefin yield. Therefore, reasonable dearomatization treatment of cracking raw materials is a good way to reduce the production cost of this process and realize the effective utiliza...

Claims

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Application Information

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IPC IPC(8): B01D71/80B01D71/38B01D71/40B01D69/04B01D67/00C07C7/144C07C9/15C07C15/06
Inventor 纪树兰张悦王乃鑫李建荣赵翠汪林
Owner BEIJING UNIV OF TECH
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