Recovery processing method of ultrahigh molecular weight polyethylene dry spinning jelly and waste fiber solvent

A technology of ultra-high molecular weight and treatment process, which is applied in the field of solvent recovery of ultra-high molecular weight polyethylene fiber jelly waste silk, can solve the problem that the solvent cannot be recovered, and achieve the effect of low degradation degree and high solvent recovery rate.

Active Publication Date: 2014-03-12
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The patent of the present invention mainly solves the deficiencies in the prior art, provides a solvent recovery treatment method for jelly blocks and jelly waste silk, and solves the problem that the solvent in the jelly waste silk produced in the production process of ultra-high molecular weight polyethylene fibers cannot The problem of recycling saves production costs. At the same time, the recovered jelly blocks and waste silk can be directly sent to downstream processing enterprises for reuse. The solvent recovery process is sealed and has no pollution to the environment.

Method used

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  • Recovery processing method of ultrahigh molecular weight polyethylene dry spinning jelly and waste fiber solvent

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Experimental program
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Embodiment 1

[0016] The pressure of the rectification system is 0.35kpa, the solvent content of jelly collagen is 38%, the weight-average molecular weight is about 2 million measured by Ubbelohde viscometer, the length-to-diameter ratio of the melting tank is 15:1, the melting temperature is 160°C, and the melting time is 4 hours. The solvent content of the gel is ≤1%, and the weight-average molecular weight of the solid is measured by an Ubbelohde viscometer at ~1.9 million.

Embodiment 2

[0018] The pressure of the rectification system is 0.35kpa, the solid content of jelly is 90%, the weight average molecular weight is about 2.5 million measured by Ubbelohde viscometer, the length-to-diameter ratio of the melting tank is 15:1, the melting temperature is 160°C, and the melting time is 4 hours. The solvent content of the gel is ≤1.5%, and the weight average molecular weight of the solid is measured by an Ubbelohde viscometer at ~2.1 million.

Embodiment 3

[0020] The pressure of the rectification system is 0.1kpa, the solvent content of jelly silk is 27%, the weight average molecular weight is about ~2 million measured by Ubbelohde viscometer, the length-to-diameter ratio of the melting tank is 15:1, the melting temperature is 150°C, and the melting time is 4h. The solvent content of the gel is ≤1%, and the weight-average molecular weight of the solid is measured by an Ubbelohde viscometer at about ~2 million.

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Abstract

The invention relates to a recovery method used for extracting a solvent from waste, and especially relates to a solvent recovery processing method of ultrahigh molecular weight polyethylene jelly waste fiber. The solvent recovery method comprises following steps: a melting pot is used for melting jelly waste fiber and jelly; a rectification unit in a dry spinning solvent recovery system is used for recycling an organic solvent of the dry spinning solvent recovery system; and solid jelly blocks are recycled. The recovery processing method is capable of solving a problem that the waste jelly fiber solvent generated in ultrahigh molecular weight polyethylene fiber production processes can not be recycled; production cost is reduced; the recycled jelly material and waste fiber can be directly delivered to downstream processors for recycling; and the solvent recovery processing processes are performed in sealed environment, so that no environmental pollution is caused.

Description

technical field [0001] The invention relates to a recycling technology for extracting solvent from waste, in particular to a solvent recycling technology for ultra-high molecular weight polyethylene fiber jelly waste silk. Background technique [0002] At present, the production of ultra-high molecular weight polyethylene fibers mainly adopts the jelly spinning process technology. During the production process, a large amount of jelly waste silk will be generated every time the car is stopped and driven. The processing of jelly waste silk is usually sold at a low price to oil refining companies for cracking and reuse, or to downstream plastic processing enterprises for reprocessing into various plastic products, etc. The solvent in jelly waste silk cannot be recovered, and the Processing enterprises bring difficulty in processing, and also cause waste of ultra-high molecular weight polyethylene solvent resources, and increase the production cost of ultra-high molecular weigh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F13/04D01F1/10C08L23/06
CPCY02P70/62
Inventor 孔凡敏景强苏豪马敏
Owner CHINA PETROLEUM & CHEM CORP
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