Preparation of an inorganic-organic composite gel membrane and its application in the separation of hydrocarbon mixtures

A technology of hydrocarbon mixtures and composite gels, applied in semipermeable membrane separation, inorganic chemistry, alkali metal compounds, etc., can solve problems such as insufficient stability, low separation efficiency, and poor mechanical properties, and achieve enhanced adsorption selectivity, Good adsorption performance, performance-enhancing effect

Active Publication Date: 2021-12-14
连云港鹏辰特种新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The membranes currently used for the separation of hydrocarbon mixtures mainly have disadvantages such as poor mechanical properties, low separation efficiency, and insufficient stability.

Method used

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  • Preparation of an inorganic-organic composite gel membrane and its application in the separation of hydrocarbon mixtures
  • Preparation of an inorganic-organic composite gel membrane and its application in the separation of hydrocarbon mixtures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Mix 0.3g of 5-aminoisophthalic acid, 1g of cobalt nitrate hexahydrate, 50ml of DMF, and 50ml of deionized water. After ultrasonic mixing at 500W power, put them in the reactor, and react at 95°C for 40h, and the reaction is over. After making mixed solution A;

[0029](2) Put 0.2g graphene nanosheets in 50ml6mol / L concentrated nitric acid for 30min, then disperse in 50ml deionized water, then add 500ml 30g / L cobalt nitrate hexahydrate solution, and add 15g urea, ultrasonic at 500W power After mixing, stir and react at 80°C for 1 hour. After the reaction, the solid obtained after centrifugation of the reaction liquid was redispersed in 100ml of deionized water, and then 20g of acrylamide, 0.001g of N,N-methylenebisacrylamide and 0.001 g potassium persulfate, polymerized at 60°C for 2 hours to prepare mixed liquid B;

[0030] (3) Soak the PAN membrane in 100ml of 30% ethanol aqueous solution for 2h, then take it out and rinse it with deionized water for 2-3 times, th...

Embodiment 2

[0032] (1) Mix 0.7g of 5-aminoisophthalic acid, 2g of cobalt nitrate hexahydrate, 50ml of DMF, and 50ml of deionized water. After ultrasonic mixing at 500W power, place it in a reactor, and react at 105°C for 50h, and the reaction ends After making mixed solution A;

[0033] (2) Put 0.6g graphene nanosheets in 50ml6mol / L concentrated nitric acid for 30min, then disperse in 50ml deionized water, then add 500ml 30g / L cobalt nitrate hexahydrate solution, and add 20g urea, ultrasonic at 500W power After mixing, stir and react at 100°C for 4 hours. After the reaction, the solid obtained after the centrifugation of the reaction solution was redispersed in 100ml of deionized water, and then 30g of acrylamide, 0.002g of N,N-methylenebisacrylamide and 0.002 g potassium persulfate, polymerized at 90°C for 6 hours to prepare mixed liquid B;

[0034] (3) Soak the PAN membrane in 100ml of 40% ethanol aqueous solution for 3 hours, then take it out and rinse it with deionized water for 3 ti...

Embodiment 3

[0036] (1) Mix 0.4g of 5-aminoisophthalic acid, 1.5g of cobalt nitrate hexahydrate, 50ml of DMF, and 50ml of deionized water, mix them ultrasonically under 500W power, place them in a reactor, and carry out the reaction at 100°C for 42 hours. Mixed solution A is obtained after finishing;

[0037] (2) Put 0.3g graphene nanosheets in 50ml6mol / L concentrated nitric acid for 30min, then disperse in 50ml deionized water, then add 500ml 30g / L cobalt nitrate hexahydrate solution, and add 16g urea, ultrasonic at 500W power After mixing, the reaction was stirred at 85°C for 2 hours. After the reaction, the solid obtained after centrifugation of the reaction solution was redispersed in 100ml of deionized water, and then 22g of acrylamide, 0.001g of N,N-methylenebisacrylamide and 0.001 g potassium persulfate, polymerized at 70°C for 3 hours to prepare mixed liquid B;

[0038] (3) Soak the PAN membrane in 100ml of 30% ethanol aqueous solution for 2h, then take it out and rinse it with de...

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Abstract

The invention discloses a preparation method of an inorganic-organic composite gel film, comprising the following steps: taking 5-aminoisophthalic acid as an organic ligand, taking cobalt nitrate hexahydrate as a metal precursor, and taking DMF and deionized water It is used as a solvent, mixed and placed in a reaction kettle to react to obtain a mixed solution A; the graphene nanosheets are treated with concentrated nitric acid and dispersed in deionized water, and a solution of cobalt nitrate hexahydrate and urea are added, mixed and stirred for reaction. The solid obtained after centrifugation of the reaction solution is redispersed in deionized water, polymer monomers, initiators and crosslinking agents are added, and the polymerization reaction is carried out to prepare the mixed solution B; the PAN membrane is pretreated, and then enters the mixed solution B , dipping treatment, and then take it out and dry it and place it in the mixed solution A for dipping treatment; such alternate dipping treatments make an inorganic-organic composite gel film. The inorganic-organic composite gel membrane prepared by the invention not only has good mechanical properties and good thermal stability, but also has large flux and good separation effect.

Description

technical field [0001] The invention relates to the field of hydrocarbon mixture separation, in particular to the preparation of an inorganic-organic composite gel membrane and its application in the separation of hydrocarbon mixtures. Background technique [0002] At present, petroleum energy is increasingly scarce, and the effective separation of hydrocarbon mixtures to meet different industrial needs has become one of the hot spots in the petrochemical industry. In particular, the separation of two mixed systems of aromatic alkanes and alkenes is of great industrial significance in the petroleum field. From the theoretical point of view of the separation of hydrocarbon mixtures, it is very difficult to separate aromatic hydrocarbons or unsaturated olefins from saturated aliphatic alkanes, which is a relatively critical process in the petrochemical industry. The relative volatilities of alkanes and aromatics, as well as alkenes and alkanes, are similar, and it is difficul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/40B01D67/00B01D69/02B01D69/12B01J20/26B01J20/28B01J20/30
CPCB01D71/40B01D69/125B01D69/02B01D67/0079B01J20/0225B01J20/261B01J20/28047B01J20/28033B01D2325/12
Inventor 江晓龙谈勇谈俊
Owner 连云港鹏辰特种新材料有限公司
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