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Method of preparing macromolecular breathable film

A polymer gas permeable membrane, automatic separation technology, applied in separation methods, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of inability to achieve effective permeation of six gases, low permeability, long equilibrium time, etc.

Inactive Publication Date: 2007-09-12
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, a single fluorine membrane or rubber membrane is commonly used in the world to carry out gas penetration for automatic separation of oil and gas in transformer oil. Practical application experience shows that: the H 2 , CO, CH 4 , C 2 h 4 , C 2 h 2 , C 2 h 6 The permeability of the six dissolved gases is low, and the ratio of the gas concentration in the gas chamber to the dissolved gas concentration in the oil after permeation equilibrium for each gas is lower than 0.3:1, and the equilibrium time is long, ranging from 7 to 15 days, which cannot achieve the above Effective penetration of six gases

Method used

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  • Method of preparing macromolecular breathable film

Examples

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Effect test

Embodiment 1

[0016] Example 1: The process flow of the preparation method of the polymer gas permeable membrane for the automatic separation of oil and gas, the purchased polytetrafluoroethylene and polyhexafluoropropylene raw materials are placed in containers respectively, put into a baking furnace, and after baking to 200 ° C, Insulate for 6 hours; prepare the baked raw materials according to 80% polytetrafluoroethylene and 20% polyhexafluoropropylene; stir the prepared raw materials evenly and place them in a container, put them in a baking furnace, and preheat them to 300°C , heat preservation for 5 hours, and then continue to heat to 380 ° C, heat preservation for 6 hours; put the heated raw materials in the mold, press molding by a press, the molding pressure is 100kg / cm 2 , the pressing time is 1 hour, and the thickness of the compressed air-permeable film is 0.05mm; put the pressed-formed air-permeable film into a baking furnace, heat it to 300°C, keep it warm for 20 hours, and the...

Embodiment 2

[0017] Example 2: The process flow of the preparation method of the polymer gas permeable membrane for the automatic separation of oil and gas, the purchased polytetrafluoroethylene and polyhexafluoropropylene raw materials are placed in containers respectively, put into a baking furnace, and after baking to 175 ° C, Insulate for 5 hours; prepare the baked raw materials according to 82.5% polytetrafluoroethylene and 17.5% polyhexafluoropropylene; stir the prepared raw materials evenly and place them in a container, put them in a baking furnace, and preheat them to 250°C , heat preservation for 4 hours, and then continue to heat to 340 ° C, heat preservation for 5 hours; put the heated raw materials in the mold, press molding by a press, the molding pressure is 75kg / cm 2 , the pressing time is 0.75 hours, and the thickness of the compressed air-permeable film is 0.075mm; put the pressed-formed air-permeable film into a baking furnace, heat it to 250°C, keep it warm for 15 hours,...

Embodiment 3

[0018] Example 3: The process flow of the preparation method of the polymer gas permeable membrane for the automatic separation of oil and gas, the purchased polytetrafluoroethylene and polyhexafluoropropylene raw materials are placed in containers respectively, put into a baking furnace, and after baking to 150 ° C, Keep warm for 4 hours; prepare the baked raw materials according to 85% polytetrafluoroethylene and 15% polyhexafluoropropylene; stir the prepared raw materials evenly and place them in a container, put them in a baking furnace, and preheat them to 200°C , keep warm for 3 hours, then continue to heat to 300°C, keep warm for 4 hours; put the heated raw materials in the mold, and press them into shape by a press, the molding pressure is 50kg / cm 2 , the pressing time is 0.5 hours, and the thickness of the pressed air-permeable film is 0.1mm; put the pressed-formed air-permeable film into a baking furnace, heat it to 200°C, keep it warm for 10 hours, and then take it o...

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Abstract

A gas-permeable high-molecular membrane for automatically separating oil from gas, that is, separating H2, CO, CH4, C2H4, C2H2 and C2H6 from transformer oil is prepared through providing raw materials, baking, mixing preheating, heating, die pressing, cooling, heat treating and turning. It has high effect and short time.

Description

technical field [0001] The invention relates to a preparation method of a polymer gas permeable membrane for automatic separation of oil and gas in transformer oil. Background technique [0002] At present, a single fluorine membrane or rubber membrane is commonly used in the world to carry out gas penetration for automatic separation of oil and gas in transformer oil. Practical application experience shows that: the H 2 , CO, CH 4 , C 2 h 4 , C 2 h 2 , C 2 h 6 The permeability of the six dissolved gases is low, and the ratio of the gas concentration in the gas chamber to the dissolved gas concentration in the oil after permeation equilibrium for each gas is lower than 0.3:1, and the equilibrium time is long, ranging from 7 to 15 days, which cannot achieve the above Effective penetration of six gases. Contents of the invention [0003] The object of the present invention is to provide a kind of preparation method of the polymer gas permeable film of automatic separ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/36B01D67/00B01D19/00
Inventor 王有元陈伟根杜林陈明英孙才新廖瑞金李剑
Owner CHONGQING UNIV
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