Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method for instant cationic polyacrylamide

A technology of polyacrylamide and acrylamide, which is applied in the field of cationic polyacrylamide synthesis, can solve the problems of long dissolving time, inconvenient dissolving, and limited use range, etc., and achieve the effect of convenient use and fast dissolving speed

Inactive Publication Date: 2010-12-22
GUANGDONG ENG TECH INST
View PDF4 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The currently produced cationic polyacrylamide has shortcomings and deficiencies such as low content and poor stability in the emulsion type. Due to the long dissolution time of the dry powder type cationic polyacrylamide, generally more than 1 hour, it is inconvenient to dissolve and limits the scope of use.

Method used

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
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Acrylamide 200

[0012] Diethyldiallyl ammonium chloride 40

[0013] Acryloyloxyethyl dimethyl benzyl ammonium chloride 8

[0014] Isopropanol 0.01

[0015] Deionized water 700

[0016] High temperature azo initiator v50 1.0

[0017] Urea 5

[0018] The process is:

[0019] ① Weigh urea and water according to the formula and add them to the reactor, stir to dissolve, then add diethyl diallyl ammonium chloride, acryloyloxyethyl dimethyl benzyl ammonium chloride, and acrylamide to the reactor;

[0020] ②Under stirring, pass nitrogen to remove oxygen, add initiator and isopropanol;

[0021] ③Heat up to 30°C, react for 6 hours, and mature for 1 hour;

[0022] ④Extrude the obtained colloid into the kneader under the pressure of 0.5MPa;

[0023] ⑤Dry and pulverize the colloidal particles in an airflow dryer at a temperature lower than 80°C to obtain the product.

Embodiment 2

[0025] Methacrylamide 400

[0026] Dimethyldiallyl ammonium chloride 30

[0027] Acryloyloxyethyl dimethyl benzyl ammonium chloride 20

[0028] Isopropanol 0.03

[0029] Deionized water 550

[0030] Redox initiator composed of sodium persulfate and bisulfite 0.6

[0031] Urea 10

[0032] The process is:

[0033] ① Weigh urea and water according to the formula and add them to the reactor, stir and dissolve, add diethyl diallyl ammonium chloride, acryloyloxyethyl dimethyl benzyl ammonium chloride, and acrylamide to the reactor;

[0034] ②Under stirring, pass nitrogen to remove oxygen, add initiator and isopropanol;

[0035] ③Heat up to 40°C, react for 8 hours, and mature for 1 hour;

[0036] ④Extrude the obtained colloid into the kneader under the pressure of 0.5MPa;

[0037] ⑤Dry and pulverize the colloidal particles in an airflow dryer at a temperature lower than 80°C to obtain the product.

Embodiment 3

[0039] N.N—Dimethyl (meth)acrylamide 600

[0040] Diethyldiallyl ammonium chloride 20

[0041] Acryloxypropyltrimethylammonium chloride 35

[0042] Isopropanol 0.05

[0043] Deionized water 400

[0044] High temperature azo initiator v50 0.2

[0045] Urea 15

[0046] The process is:

[0047] ① Weigh urea and water according to the formula and add them to the reactor, stir to dissolve, then add diethyl diallyl ammonium chloride, acryloyloxyethyl dimethyl benzyl ammonium chloride, and acrylamide to the reactor;

[0048] ②Under stirring, pass nitrogen to remove oxygen, add initiator and isopropanol;

[0049] ③Heat up to 50°C, react for 10 hours, and ripen for 1 hour;

[0050] ④Extrude the obtained colloid into the kneader under the pressure of 0.5MPa;

[0051] ⑤Dry and pulverize the colloidal particles in an airflow dryer at a temperature lower than 80°C to obtain the product.

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
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a preparation method for instant cationic polyacrylamide, which is characterized by comprising the following steps: firstly, dissolving 5-15 parts of urea by weight in 400-700 parts of water by weight; then adding 200-600 parts of nonionic monomers by weight and 25-80 parts of cationic monomers by weight, evenly mixing, introducing nitrogen and deoxidizing; and finally adding 0.2-1.0 part of water-soluble initiator by weight and 0.01-0.05 part of chain transfer agent by weight, and carrying out polymerization reaction at the temperature of 20-80 DEG C for 5-10h. The instant cationic polyacrylamide product of the invention with the appearance as a white particle has the grain size within 20-30 meshes, and has the characteristics of high dissolving speed, no toxicity, environmental friendliness and the like. Compared with the traditional polyacrylamide, the instant cationic polyacrylamide has more convenient use and can serve as an organic flocculating agent, a paper strengthening agent, a retention aid and the like to be applied to the fields of municipal sewage and industrial sewage treatment, paper making and the like.

Description

technical field [0001] The invention belongs to the field of cationic polyacrylamide synthesis methods, and in particular relates to a preparation method of instant cationic polyacrylamide. Background technique [0002] The currently produced cationic polyacrylamide has shortcomings and deficiencies such as low content and poor stability in the emulsion type. The dry powder type cationic polyacrylamide has long dissolution time, generally longer than 1 hour, which causes inconvenient dissolution and limits the scope of use. With the improvement of automation of dissolution equipment in sewage treatment plants, the requirement for product dissolution speed is getting faster and faster. Therefore, it is necessary to develop a preparation method for instant cationic polyacrylamide. Contents of the invention [0003] The object of the present invention is to propose a preparation method of fast-dissolving cationic polyacrylamide with good water solubility, aiming at the defect...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08F220/56C08F2/38
Inventor 陈大志吴晓冰王飞
Owner GUANGDONG ENG TECH INST
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com