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Method for preparing anionic polyacrylamide microspheres

A polyacrylamide, anionic technology, applied in the field of preparation of anionic polyacrylamide microspheres, to achieve the effect of stable properties, high active ingredients and high molecular weight

Inactive Publication Date: 2011-09-28
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on the inverse suspension polymerization of anionic polyacrylamide mainly focuses on the production of superabsorbent resin. At present, some large foreign companies have realized industrialization, and there are some laboratory research reports in China, but there is no such product in China.

Method used

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  • Method for preparing anionic polyacrylamide microspheres
  • Method for preparing anionic polyacrylamide microspheres
  • Method for preparing anionic polyacrylamide microspheres

Examples

Experimental program
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Embodiment 1-4

[0024] According to the data of table 1, in the 250mL four-neck flask, add 150mL of dispersed phase cyclohexane and dispersant (dispersant can be selected sorbitan monostearate, sorbitan monooleate, sorbitan Trioleate, sorbitan tristearate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan trioleate Ester, polyoxyethylene hydrogenated castor oil ester, soybean lecithin, stearyl phosphate, polyoxyethylene nonylphenol ether, sodium dodecylsulfonate, sodium dodecylbenzenesulfonate, octadecyl Trimethylammonium bromide or dihexadecyltrimethylammonium bromide), heated to 50°C and stirred to dissolve the dispersant, then cooled for later use.

[0025] Add NaOH into the beaker to neutralize the protons in the monomer solution of acrylamide, dissolve it with a small amount of distilled water, and cool it at room temperature for use. And dissolve completely with a small amount of distilled water. Put the monomer solution in an ice-wat...

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Abstract

The invention discloses a method for preparing anionic polyacrylamide microspheres. A reversed phase suspension polymerization method is adopted and comprises the following main steps of: a) dissolving a dispersing agent in a disperse phase; b) adding aqueous alkali into monomer solution of acrylamide to obtain neutral monomer solution; c) heating the monomer solution to the temperature of between 45 and 60DEG C in the nitrogen atmosphere, adding an initiator, and performing reaction at the temperature of between 60 and 65DEG C; and d) performing azeotropic water removal at the temperature of between 50 and 65DEG C in the vacuum degree of 0.01-0.05MPa to obtain the target product, wherein the weight part ratio of the disperse phase to the dispersing agent to the monomer solution to the initiator is (70-95):(0.4-2):(5-30):(0.0001-0.001). The product is white or transparent solid microspheres, and has high content of active ingredient and more stable properties and is more convenient to store for a long time and transport in a long distance and more easily quantitatively prepared into the required solution on spot compared with emulsion and solution products.

Description

technical field [0001] The invention relates to a preparation method of anionic polyacrylamide, more specifically to a preparation method of water-soluble anionic polyacrylamide microspheres prepared by reverse phase suspension polymerization. Background technique [0002] Polyacrylamide (PAM) is a linear water-soluble polymer. Due to the large chemical reaction of its side chain phthaloamide group, it can undergo conversion reactions with various compounds. Therefore, polyacrylamide and its derivatives can be used As a flocculant, thickener, antistatic agent, surfactant, etc. It is widely used in petroleum exploration, water treatment, papermaking, mining, metallurgy, geology, textile, construction, medicine, sugar refining, breeding, agriculture and other industrial sectors. It is known as "all kinds of additives". [0003] The main forms of polyacrylamide (PAM) products are aqueous colloid, powder and latex, and there are anionic, cationic and nonionic types. Among the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/06C08F220/58C08F2/32
Inventor 刘志宏江文王学江崔光磊王海波韩鹏献
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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