Method for recycling paraffin from polytetrafluoroethylene resin kettle-cleaning material

A polytetrafluoroethylene resin and polytetrafluoroethylene technology, which is applied in the field of recycling paraffin, can solve the problems such as no public reports of polytetrafluoroethylene resin tank cleaning materials and paraffin separation and purification methods, and achieve the improvement of resource utilization value, Realize the effect of productization and high product purity

Active Publication Date: 2018-07-03
ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] According to public information, there is no public report on the separation and purification method of polytetrafluoroethylene resin and paraffin.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The present embodiment provides a method for reclaiming paraffin wax from polytetrafluoroethylene resin cleaning material, the specific steps of the method are as follows: in a reaction kettle with a volume of 500L, add 200kg polytetrafluoroethylene resin cleaning material (wherein , by weight, polytetrafluoroethylene resin 35%, water 5% and paraffin 60%) and 100kg deionized water, control temperature 60-65 ℃, time 1h, stir 0.5h after melting, finish washing with water. Stand for stratification for 1 hour, start the vacuum pump, suck the upper layer of paraffin liquid into the dryer, start the stirring and vacuum system of the dryer, turn on the steam heating device, and implement the drying and dehydration operation. Control temperature 80~100℃, drying time 0.5h, vacuum degree -0.08MPa~-0.09MPa. After drying, start the precision filter device, pump the paraffin to the filter under pressure, and perform the filter operation, the filter pressure is 1.5kgf / cm 2 . The fi...

Embodiment 2

[0053] The present embodiment provides a method for reclaiming paraffin wax from polytetrafluoroethylene resin cleaning material, the specific steps of the method are as follows: in a reaction kettle with a volume of 500L, add 200kg polytetrafluoroethylene resin cleaning material (wherein , by weight, polytetrafluoroethylene resin 35%, water 5% and paraffin 60%) and 150kg deionized water, control temperature 70-80 ℃, time 1h, stir 1h after melting, finish washing. Stand for stratification for 1 hour, start the vacuum pump, suck the upper layer of paraffin liquid into the dryer, start the stirring and vacuum system of the dryer, turn on the steam heating device, and implement the drying and dehydration operation. Control temperature 80~100℃, drying time 0.5h, vacuum degree -0.08MPa~-0.09MPa. After drying, start the precision filter device, pump the paraffin to the filter under pressure, and carry out the filter operation, the filter pressure is 1.0kgf / cm 2 . The filtrate flow...

Embodiment 3

[0061] The present embodiment provides a method for reclaiming paraffin wax from polytetrafluoroethylene resin cleaning material, the specific steps of the method are as follows: in a reaction kettle with a volume of 500L, add 200kg polytetrafluoroethylene resin cleaning material (wherein , by weight, polytetrafluoroethylene resin 35%, water 5% and paraffin 60%) and 200kg deionized water, control temperature 70-80 ℃, time 1.5h, stir 1h after melting, finish washing with water. Stand for stratification for 2 hours, start the vacuum pump, suck the paraffin liquid in the upper layer into the desiccator, start the stirring and vacuum system of the desiccator, turn on the steam heating device, and implement the drying and dehydration operation. Control temperature 80~100℃, drying time 0.5h, vacuum degree -0.08MPa~-0.09MPa. After drying, start the precision filter device, pump the paraffin to the filter under pressure, and carry out the filter operation, the filter pressure is 3kgf / ...

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Abstract

The invention provides a method for recycling paraffin from a polytetrafluoroethylene resin kettle-cleaning material. The method comprises the following steps: (1) adding the polytetrafluoroethylene resin kettle-cleaning material and water into a reaction kettle, heating until the polytetrafluoroethylene resin kettle-cleaning material is melted, and stirring, so as to finish washing; (2) standingthe washed material in the kettle for layering, adding a rough paraffin mixture on an upper layer into a dryer, and drying for dehydration; and (3) filtering: filtering the material dried and dehydrated in the step (2), so as to obtain paraffin. Separated polytetrafluoroethylene resin can be used as a common industrial product and can be widely applied to various fields and emerging industries innational economy, and the separated paraffin can be used as a civilian product. The method is applied to the recycling of paraffin from the kettle-cleaning material in the production process of the polytetrafluoroethylene resin and has the characteristics that the process is simple, the control is easy, and the purity of the paraffin product is high, and the like.

Description

technical field [0001] The invention relates to the field of fine chemicals, in particular to a method for recovering paraffin from polytetrafluoroethylene resin cleaning material. Background technique [0002] Paraffin wax is a mixture of saturated straight-chain alkanes and branched-chain alkanes obtained from petroleum refining. It is a colorless, white or translucent substance, odorless and tasteless, and has no fixed melting point. The melting point ranges from 43 to 65 ° C. It is food wax, refined paraffin wax, semi-refined paraffin wax, crude wax, match wax and black wax, etc. High-quality paraffin is widely used in food, packaging, medicine, printing, daily chemical, automobile and other industries. For example, various wax papers with good waterproof properties can be prepared by immersing paper in paraffin, which can be used in food, medicine and other packaging, metal antirust and printing industries; paraffin is added to cotton yarn to make textiles soft, smooth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/06C10G73/42
CPCC08J11/06C10G73/42Y02W30/62
Inventor 张国平刘守贵王勇开何光梅游黄洋邓礼洪
Owner ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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