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Parchment recovery and degradation process

A technology of parchment paper and technology, which is applied in the field of parchment paper technology, can solve the problems of insufficient recycling technology, low pulp purity, and large annual consumption, and achieve the effects of stable fiber properties, high degree of mechanization, and high utilization value

Inactive Publication Date: 2019-06-04
FAREAST KINGSTAR CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Parchment paper is often used for book copying. Because of its good water absorption, uniform structure and high strength, parchment paper is widely used in industrial products such as mechanical parts, instruments, chemicals, and inner packaging of food, pharmaceuticals, and disinfection materials. Because of its large annual consumption, the processing of parchment paper is also one of the difficulties. The best solution for waste parchment paper is to recycle it. However, the existing recycling process is not perfect and the recycling efficiency is low. , the recovered slurry has low purity, low utilization value, and relatively complicated equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] The following is a specific embodiment of the present invention. This embodiment comprises the following steps:

[0012] (1) The parchment to be recycled is transported to the feed port of the pulping device by the conveyor, and the deinking agent and water are added to the pulping device at the same time, and the high-concentration dissociation, screening and water washing operations are completed in the pulping device at one time. Then the treated slurry is transported to the pulper in the pulping device for crushing operation.

[0013] (2) The disintegrated pulp is transported to the fiber separator through the outlet, and polypentose and lignin are added to the fiber separator, and then the pulp is decomposed and screened, and the heavy weight in the pulp is Fertilizers and light impurities are removed from the slurry to obtain a pure slurry.

[0014] (3) Disperse the above-mentioned pure slurry, transport it to the lye tank, carry out alkali treatment in a causti...

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Abstract

The invention relates to the technical field of parchment processes, in particular to a parchment recovery and degradation process. The parchment recovery and degradation process includes the steps of: (1) transporting to-be-recovered parchment to a feed inlet, adding a deinking agent and water to complete high concentration dissociation, screening and washing operation, and then subjecting the slurry to repulping operation; (2) transporting the repulped slurry into a fiber separator, adding pentosan and lignin, and then carrying out defibering and screening operation; (3) subjecting the purified slurry to slurry dispersion treatment, then transporting the slurry into a lye tank, and conducting alkali treatment in a caustic soda solution; and (4) at the end of alkali treatment, rinsing outthe lye in the slurry, and then conducting airing and recovery to complete recovery and degradation of parchment. The process provided by the invention has the beneficial effects of: simple process,complete working procedure, high mechanization degree and stable properties of recovered fiber.

Description

(1) Technical field [0001] The invention relates to the technical field of parchment paper technology, in particular to a process for recycling and degrading parchment paper. (2) Background technology [0002] Parchment paper is often used for book copying. Because of its good water absorption, uniform structure and high strength, parchment paper is widely used in industrial products such as mechanical parts, instruments, chemicals, and inner packaging of food, pharmaceuticals, and disinfection materials. Because of its large annual consumption, the processing of parchment paper is also one of the difficulties. The best solution for waste parchment paper is to recycle it. However, the existing recycling process is not perfect and the recycling efficiency is low. , the recovered slurry has low purity, low utilization value, and relatively complicated equipment. (3) Contents of the invention [0003] In order to make up for the deficiencies of the prior art, the present inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/32D21B1/34
CPCY02W30/64
Inventor 孙志强
Owner FAREAST KINGSTAR CHEM