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Composite flocculant and its flocculation method, recycling method and system

A composite flocculant, cyclic regeneration technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sewage multi-stage treatment, etc. The effect of transportation treatment and avoiding water pollution

Active Publication Date: 2022-03-22
SHENZHEN CYPRESS IND DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a recycling method, a recycling system and a composite flocculant thereof, so as to solve the problem of wasting developer waste liquid in the prior art

Method used

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  • Composite flocculant and its flocculation method, recycling method and system
  • Composite flocculant and its flocculation method, recycling method and system
  • Composite flocculant and its flocculation method, recycling method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Taking the preparation of 1 kg of composite flocculant as an example, the components and contents of the composite flocculant are as follows:

[0047] Cationic polymer coagulant polymethacrylate 25% 250g

[0048] Anionic polymer coagulant polyacrylamide 75% 750g

[0049] The compound flocculant preparation method of present embodiment 1 is as follows:

[0050] A1, take by weighing 250g cationic macromolecule coagulant polymethacrylate, be dissolved in ethanol, preserve separately;

[0051] A2. Weigh 750g of anionic polymer coagulant polyacrylamide, dissolve it in deionized water, and store it separately.

Embodiment 2

[0053] Taking the preparation of 1 kg of composite flocculant as an example, the components and contents of the composite flocculant are as follows:

[0054] Cationic polymer coagulant polymethacrylate 60% 600g

[0055] Anionic polymer coagulant polyacrylamide 40% 400g

[0056] For the preparation method of the composite flocculant of this embodiment, refer to Example 1, and details are not repeated here.

Embodiment 3

[0058] Taking the preparation of 1 kg of composite flocculant as an example, the components and contents of the composite flocculant are as follows:

[0059] Cationic polymer coagulant polymethacrylate 50% 600g

[0060] Anionic polymer coagulant polyacrylamide 50% 500g

[0061] For the preparation method of the composite flocculant of this embodiment, refer to Example 1, and details are not repeated here.

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Abstract

The invention provides a composite flocculant, a flocculation method, a recycling method and a system thereof. The composite flocculant includes the following components by weight percentage: 25%-60% of cationic polymer coagulant polymethacrylate, and 40%-75% of anionic polymer coagulant polyacrylamide. The present invention absorbs the positively charged cationic polymer coagulant polymethacrylate on the surface of the negatively charged colloid particles to form flocs, and neutralizes the negative charges on the surface of the colloid particles, so that the negatively charged Reaction forces between colloidal particles are reduced. Then, the anionic polymer coagulant polyacrylamide and the cationic polymer coagulant polymethacrylate attract each other, so that the particle size of the flocs increases to facilitate the subsequent separation process. Moreover, the water content of the floc obtained after the composite flocculant is flocculated is relatively low, which is convenient for transportation and treatment. Moreover, the filtrate is transparent and can be recycled, thereby avoiding the problem of waste liquid polluting water resources.

Description

technical field [0001] The invention relates to the technical field of electronic device processing, in particular to a composite flocculant, a flocculation method, a recycling method and a system thereof. Background technique [0002] In the manufacturing process of electronic components such as semiconductor devices, liquid crystal displays, and printed circuit boards, circuits are formed using photolithography. That is to form a negative or positive photoresist film on the substrate, irradiate the photoresist film with ultraviolet light in a prescribed pattern through the mask negative, then develop it with a developer, and then remove the unexposed part , thereby forming a prescribed circuit pattern on the surface of the substrate. [0003] At present, most photoresists are composed of alkaline soluble resin main agent, fillers, photosensitizers, pigments, auxiliary agents, etc., and most of the developers are carbonate-type solutions. The development process is the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56C02F9/04C02F103/40
CPCC02F1/56C02F9/00C02F1/001C02F1/66C02F1/283C02F2103/40
Inventor 莫庆生宁秋方饶猛
Owner SHENZHEN CYPRESS IND DEV CO LTD
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