Preparation method of partially hydrolyzed polyacrylamide with improved temperature and salt resisting performances

A polyacrylamide, temperature-resistant and salt-resistant technology, which is applied in the field of preparation of partially hydrolyzed polyacrylamide, can solve the problems of inability to produce high-performance products, high production process costs, and low production efficiency, so as to reduce investment in production equipment, The effect of reducing equipment investment and improving production efficiency

Active Publication Date: 2011-05-18
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the long production process, equipment such as kneaders and ripeners are required, resulting in large investment in equipment, high energy consumption, and high production process costs.
[0007] None of the above methods for producing partia

Method used

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  • Preparation method of partially hydrolyzed polyacrylamide with improved temperature and salt resisting performances
  • Preparation method of partially hydrolyzed polyacrylamide with improved temperature and salt resisting performances
  • Preparation method of partially hydrolyzed polyacrylamide with improved temperature and salt resisting performances

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0047] Example 1

[0048] Weigh the components according to the following formula:

[0049]

[0050] Dissolve the above-mentioned initiators individually in a 1 liter beaker with distilled water and store in the dark; the remaining components are dissolved in the batching kettle, and distilled water is added to 500kg to obtain the polymerization solution. The polymerization solution is fed into the polymerization tank and added to the polymerization solution. Pour in high-purity nitrogen to drive off oxygen, and at the same time cool the polymerization solution. After the polymerization solution is cooled to 8°C, first add the prepared triethylamine aqueous solution to the polymerization kettle, and then add the prepared 2,3-dimethylamine solution. The butane hydrogen peroxide aqueous solution is added to the polymerization kettle, after the addition, the high-purity nitrogen is continued to be passed, and the high-purity nitrogen is stopped after 10 minutes, the polymerization ket...

Example Embodiment

[0061] Example 2

[0062]

[0063] Weigh the components according to the above formula, control the initial reaction temperature at 3°C, and the other operation steps are the same as in Example 1, except that the amount of NaOH added during hydrolysis is 15kg, and the molecular weight of the polymer obtained is 29 million. The degree is 15%, the viscosity is 31.9 cp at 25°C, and 16.7 cp at 85°C.

Example Embodiment

[0064] Example 3

[0065]

[0066] Weigh the components according to the above formula, control the initial temperature of the reaction at 0°C, and the other operation steps are the same as in Example 1, except that the amount of NaOH added during hydrolysis is 30kg, and the molecular weight of the polymer obtained is 29 million. The degree is 30%, the viscosity is 33.2cp at 25°C, and 17.5cp at 85°C.

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Abstract

The invention relates to a preparation method of partially hydrolyzed polyacrylamide with improved temperature and salt resisting performances by using a template polymerization mode. The polymerization initial temperature of the partially hydrolyzed polyacrylamide is controlled to be 0-15DEG C at which template materials are more remarkably acted with functional monomers of polymerization monomers to facilitate the forming of a polyacrylamide product with a block structure; by adopting the template polymerization at the polymerization phase, polymer colloid particles have superhigh molecular weight and maintain favorable dissolving performance at the same time; and by using the temperature of the polymer colloid particles during generation, NaOH is added for hydrolysis during discharge. The number average molecular weight of the partially hydrolyzed polyacrylamide disclosed by the invention can reach 25-32 millions; meanwhile, compared with a random copolymerization product, the high polymer structure has more ordered block sequence structure, so that the partially hydrolyzed polyacrylamide has favorable dissolving performance; in addition, higher viscosity can be maintained in saline water with high temperature and high salinity.

Description

technical field [0001] The invention belongs to the field of preparation of partially hydrolyzed polyacrylamide, in particular to a preparation of partially hydrolyzed polyacrylamide with good water solubility and relatively high viscosity in high-temperature, high-salinity brine by means of template polymerization method. Background technique [0002] The molecular structure of polyacrylamide enables it to be used in many fields, and it is one of the most widely used varieties of water-soluble polymers. It can be used as oil displacing agent, flocculant, thickener, paper strengthening agent and liquid drag reducer, etc. It is widely used in water treatment, papermaking, petroleum, coal, mining and metallurgy, geology, textile, construction and other fields. [0003] Polyacrylamide products mainly include dry powder type, colloid type and emulsion type, and dry powder type accounts for more than 90% of the total, which is the most important type of polyacrylamide products. ...

Claims

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Application Information

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IPC IPC(8): C08F297/00C08F220/56C08F220/06C08F8/12B29B9/06
Inventor 吴飞鹏张云龙张玉玺施盟泉
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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