Preparation method of starch grafted acrylamide flocculating agent

A technology of acrylamide and starch grafting, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of low efficiency, low grafting rate of copolymer grafting efficiency, and unrepeatable, etc., and achieve high solid content and large molecular weight , the effect of high polymerization rate
CN101704928BInactive Publication Date: 2011-10-05GUANGZHOU UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGZHOU UNIVERSITY
Publication Date
2011-10-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a preparation method of a starch grafted acrylamide flocculating agent, which comprises the following concrete step of polymerizing starch and acrylamide in a reversed emulsion formed by liquid paraffin, water and a compounded emulsifying agent to form a graft copolymer of the starch and the acrylamide, wherein potassium permanganate is used as an initiator, and the compounded emulsifying agent comprises span 80, Tween 80 and alkylphenol polyoxyethylene (4) in a mass ratio of 7-9:0.1-0.5:0.9-2.5. The method adopts the compounded emulsifying agent comprising the span 80,the Tween 80 and the alkylphenol polyoxyethylene (4) for preparing the reversed emulsion, thereby stabilizing the system of the reversed emulsion, providing a stable reaction environment for polyreaction, and being helpful for improving the stability of products. In addition, in the method, the potassium permanganate is also selected as the initiator, thereby effectively improving the efficiency of initiating the polyreaction.
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Description

technical field

[0001] The invention relates to the field of organic chemistry, in particular to a polymer compound obtained by reacting only carbon-carbon unsaturated bonds. Background technique

[0002] Organic flocculants refer to natural or synthetic organic molecular substances that can produce flocculation. Natural organic flocculants are protein or polysaccharide compounds, such as starch, protein, animal glue, sodium alginate, sodium carboxymethylcellulose, etc.; synthetic organic flocculants include polyacrylamide, sodium polyacrylate, polyethylene Pyridinium salt, polyethyleneimine, etc. These flocculants are all water-soluble linear polymer substances, most of which can be ionized in water, and are polymer electrolytes. According to the characteristics of their dissociated groups, they can be divided into anion, cation and amphoteric types. After the flocculant is ionized in water, its chain molecules can produce bonding and bridging effects, and the charged gro...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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