Resource recycling method of waste polymeric microfiltration/ultrafiltration membrane

A polymer and ultrafiltration membrane technology, applied in recycling technology, plastic recycling, etc., can solve problems such as environmental pollution, and achieve the effects of simple process, mild reaction conditions and fast adsorption speed

Inactive Publication Date: 2014-02-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of environmental pollution caused by improper disposal of waste polymer mi

Method used

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  • Resource recycling method of waste polymeric microfiltration/ultrafiltration membrane

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specific Embodiment approach 1

[0021] Specific implementation mode 1: In this implementation mode, a method for resource recovery and utilization of waste polymer microfiltration / ultrafiltration membrane is carried out according to the following steps:

[0022] 1. Cleaning and drying of waste filter membranes: Soak waste filter membranes in sodium hypochlorite solution with available chlorine content of 0.05% to 0.2%, alkali solution with pH=10 to 12 and acid solution with pH=2 to 3. The time is 1h to 5h, take it out, wash it with water for 1 to 2 times, take it out and dry it naturally to obtain a dry filter membrane;

[0023] Two, the preparation of macromolecule solution: the dry filter membrane that obtains in step 1 is joined in the organic solvent that is soluble in water, after stirring and dissolving, add additive again, obtain macromolecule solution after additive dissolves;

[0024] Wherein, the mass ratio of the dry filter membrane to the water-soluble organic solvent is 1g:(20~100)mL; the mass r...

specific Embodiment approach 2

[0029] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the waste filter membrane described in step 1 is a polymer microfiltration membrane or a polymer ultrafiltration membrane. Other parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the waste filter membrane described in step 1 is polyvinylidene fluoride microfiltration membrane, polyvinyl chloride ultrafiltration membrane, polysulfone ultrafiltration membrane membrane or polyethersulfone microfiltration membrane. Other parameters are the same as in Embodiment 1 or 2.

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Abstract

The invention relates to a resource recycling method of a waste polymeric microfiltration/ultrafiltration membrane, and aims to solve the problem that environmental pollution is caused due to improper treatment of waste polymer microfiltration/ultrafiltration membranes. The method comprises steps as follows: step one, the waste filtration membrane is cleaned and dried; step two, a polymer solution is prepared; step three, a polymeric absorption resin particle suspension liquid is prepared; and step four, the polymeric absorption resin particle suspension liquid is post-processed, and polymeric absorption resin particles are obtained. According to the method, the waste filtration membrane is taken as a raw material, and polymeric absorption resin is prepared with a nonsolvent-induced phase separation method, so that harmless treatment and resource recycling of the waste filtration membrane are realized, and the method has good environmental benefits and economic benefits. The method is applied to the field of water treatment, chemical engineering and the like.

Description

technical field [0001] The invention relates to a method for resource recovery and utilization of waste polymer functional membranes. Background technique [0002] Most of the microfiltration / ultrafiltration membranes that have been commercially used at present are polymer membranes. Due to the characteristics of the polymer material itself, under the action of various environmental factors, the polymer membrane will age as time goes on, which will change the separation performance of the membrane, making it difficult to meet the use requirements and need to be replaced with a new membrane. The current research and application show that the service life of polymer membranes is generally 3 to 8 years. [0003] With the continuous development of membrane technology, membrane performance has been continuously improved, membrane prices have been continuously reduced, and the application range and application scale of membrane technology have been continuously expanded. At pres...

Claims

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Application Information

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IPC IPC(8): B29B17/00
CPCY02W30/62
Inventor 李凯梁恒瞿芳术李圭白韩正双余华荣杜星
Owner HARBIN INST OF TECH
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