Composite flocculant and its flocculation method, recycling method and system
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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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[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
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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:
[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...
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