Recovery process of waste materials generated in industrial manufacture process of poly-p-phenylene terephthamide aramid fiber II

A poly-p-phenylene terephthalamide aramid fiber and poly-p-phenylene terephthalamide technology, which is applied in the field of synthetic fibers, can solve problems such as endangering environmental safety, and achieve the effect of cost saving

Inactive Publication Date: 2012-07-11
王锡璐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The present invention aims to solve the problem of industrial waste produced during the manufacture of poly-paraphenylene terephthalamide (PPTA) aramid II fibers, and provides an industrially manufactured poly-paraphenylene terephthalamide (PPTA) aramid II fiber. The waste recycling process generated in the process not only can make aramid Ⅱ waste into a valuable product, but also does not endanger environmental safety

Method used

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  • Recovery process of waste materials generated in industrial manufacture process of poly-p-phenylene terephthamide aramid fiber II

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Comparison scheme
Effect test

Embodiment 1

[0043]Recycling process of waste generated during industrial manufacturing of polyparaphenylene terephthalamide aramid fiber II:

[0044] A. Waste pretreatment:

[0045] a. Dry the unwound aramid II dry yarn in an oven at 120°C for 20 minutes;

[0046] b. Immediately soak the unwound aramid II wet yarn in supersaturated NaHCO 3 In the solution, take it out after 2 hours, rinse it with industrial water for 4 times, until the surface of the wet yarn fiber is weakly alkaline and have a pH value of 7.0, then dry the wet yarn at 120°C for 4 hours, and the moisture content of the fiber is 8%; Add the wet yarn waste into the slurry mixing kettle, add 99% sulfuric acid to prepare a concentration of 19.4% by the weight of the waste yarn;

[0047] c. During the spinning operation, use a plastic bag to collect the leaked poly-p-phenylene terephthalamide / sulphuric acid spinning, then allow it to solidify at room temperature, and store it in a sealed barrel; The logarithmic viscosity o...

Embodiment 2

[0053] Recycling process of waste generated during industrial manufacturing of polyparaphenylene terephthalamide aramid fiber II:

[0054] A. Waste pretreatment:

[0055] a. Dry the unwound aramid II dry yarn in an oven at 140°C for 45 minutes;

[0056] b. Immediately soak the unwound aramid II wet yarn in supersaturated NaHCO 3 In the solution, take it out after 24 hours, rinse it with industrial water for 10 times, until the surface of the wet yarn fiber has a weakly alkaline pH value of 9.0, then dry the wet yarn at 140°C for 12 hours, and the moisture content of the fiber is 4%; Add the wet yarn waste material to the slurry mixing kettle, and add 100% sulfuric acid to prepare a concentration of 19.3% by the weight of the waste yarn;

[0057] c. During the spinning operation, use a plastic bag to collect the leaked poly-p-phenylene terephthalamide / sulphuric acid spinning, then allow it to solidify at room temperature, and store it in a sealed barrel; Polymers containing...

Embodiment 3

[0063] Recycling process of waste generated during industrial manufacturing of polyparaphenylene terephthalamide aramid fiber II:

[0064] A. Waste pretreatment:

[0065] a. Dry the unwound aramid II dry yarn in an oven at 130°C for 33 minutes

[0066] b. Immediately soak the unwound aramid II wet yarn in supersaturated NaHCO 3 In the solution, take it out after 13 hours, wash it with industrial water for 7 times, until the surface of the wet yarn fiber has a weak alkaline pH value of 8.0, then dry the wet yarn at 130°C for 8 hours, and the moisture content of the fiber is 6%; Add the wet yarn waste into the slurry mixing kettle, and add 99.5% sulfuric acid to prepare a slurry with a concentration of 19.35% by the weight of the waste yarn;

[0067] c. During the spinning operation, use a plastic bag to collect the leaked poly-p-phenylene terephthalamide / sulphuric acid spinning, then allow it to solidify at room temperature, and store it in a sealed barrel; Polymers contain...

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Abstract

The invention relates to a recovery process of waste materials generated in an industrial manufacture process of poly-p-phenylene terephthamide aramid fiber II, belonging to the field of synthetic fibres. The recovery process of waste materials generated in the industrial manufacture process of the poly-p-phenylene terephthamide (PPTA) aramid fiber II is characterized in that the waste materials of aramid fiber II can be manufactured into valuable products, and the environmental safety is not harmed. According to the recovery process, the solubility of the poly-p-phenylene terephthamide in concentrated sulfuric acid is utilized, and the hot melt of poly-p-phenylene terephthamide / sulfuric acid solution is utilized for recovery processing. Different processing and recovering processes and parameters are designed according to different waste materials, the waste materials are recovered together to be made into the aramid fiber II staple, and therefore cost is saved.

Description

technical field [0001] The invention belongs to the field of synthetic fibers, and in particular relates to a recycling process for waste produced in the process of industrially manufacturing polyparaphenylene terephthalamide aramid II. Background technique [0002] The raw material of aramid fiber II is poly(p-phenylene terephthalamide) fiber [poly(p-phenylene terephthalamide)] (referred to as PPTA), and its chemical formula is: [0003] [0004] The above PPTA polymers were synthesized in the 1960s, and DuPont of the United States invented PPTA / H in 1970. 2 SO 4 Solution spun fiber yarn. In 1972, it began to develop the market in small batches for PPTA fiber production. In 1982, it started industrial production. The product name was Kevlar. In 1985, Akzo in the Netherlands put into PPTA aramid production, and the product name was Twaron. Japan's Teijin Corporation acquired the Twaron business of Akzo in the Netherlands in 2005, and continued to expand production to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F13/04D01D5/04D01D10/00D01D10/06
CPCY02P70/62
Inventor 王锡璐
Owner 王锡璐
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