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Preparation method of high-molecular copolymer cationic polyacrylamide flocculant

A polyacrylamide and cationic technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of poor treatment effect of anion wastewater, and achieve the effect of high viscosity-average molecular weight

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the poor treatment effect of the existing treatment technology on anionic wastewater with a low pH value, the present invention develops a preparation method of a copolymerized cationic polymer polyacrylamide flocculant

Method used

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  • Preparation method of high-molecular copolymer cationic polyacrylamide flocculant
  • Preparation method of high-molecular copolymer cationic polyacrylamide flocculant

Examples

Experimental program
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Embodiment 1

[0032] In a factory in Jiangyin, this product ACM6 was used to conduct a comparative experiment with British products. Now take 0.5g of ACM6 and British products and dissolve them in 500ml of hot water and stir evenly. In mud, mix evenly, filter and extrude into a block without sticking, and the filtrate has been tested for COD, BOD, Cr 总 , SS and other tests, from the results, all the data are superior to foreign products, the comparative data are as follows:

[0033]

Embodiment 2

[0035] A factory in Jiangyin used this product ACM7 and the product of Beijing Research Institute of Chemical Industry to conduct a comparative experiment. Now take 0.5g of ACM7 and the British product and dissolve them in 500ml of hot water and stir evenly. Take 2ml and add them to 250ml of anionic flocculant for treatment In the mixed sludge, mix evenly, filter and extrude into a block without sticking, and the filtrate has undergone COD, BOD, Cr 总 , SS and other tests, from the results, all the data are superior to foreign products, the comparative data are as follows:

[0036]

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Abstract

The invention relates to a preparation method of a high-molecular copolymer cationic polyacrylamide flocculant. The product is prepared by copolymerization of acrylamide-methacrylic acid-2-oxylactone trimethylammonium chloride. Acrylamide (AM), trimethylamine hydrochloride, chloropropylene oxide, tetrachloroethane, methacrylic acid and deionized water, etc. used as raw materials undergo aqueous solution polymerization at normal pressure. During the reaction process, an additive, a polymerization inhibitor, an emulsifier and an initiator are added, and monomer concentration is controlled to 30-50%. Then, a cationic flocculant which meets usage requirements and has 2-5*106 of viscosity-average molecular weight can be prepared stably. Yield is greater than 95.0%. The whole polymerization only takes 6-7 hours to prepare the flocculant. Water quality index of sewage treated by the use of the prepared flocculant is more superior, and usability of the flocculant is approximately the same as that of a foreign similar product.

Description

technical field [0001] The invention relates to a preparation method of an organic flocculant, in particular to a preparation method of a polymer copolymerized cationic polyacrylamide flocculant. Background technique [0002] The flocculation and sedimentation method is usually to put a flocculant into water or industrial wastewater, so that the colloid and suspended particles in the water are flocculated into larger flocs, and the flocs are separated by sedimentation, separation, centrifugation, flotation or other methods, so that natural water or Industrial wastewater can be purified. Most polymer flocculants are homopolymers or copolymers and polymer electrolytes that are soluble in the dispersion medium. Their mechanism of action is: after being added to the water body, the linear polymer compound with various functional groups acts as a "bridge", adsorbing the particles to form flocs. It is strong, sinks quickly, is easy to dehydrate sludge, and has many varieties, wh...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/34C02F1/56
Inventor 李敏朱立忠陆建国
Owner CHINA PETROLEUM & CHEM CORP
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