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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 partially hydrolyzed polyacrylamide can produce high-performance products suitable for strict use requirements. At the same time, the production process has the above-mentioned analysis problems, the production cost is high, and the production efficiency is low.

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
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Effect test

Embodiment 1

[0048] Weigh each component according to the following formula:

[0049]

[0050] Dissolve each of the above-mentioned initiators in distilled water in a 1-liter beaker and store away from light; dissolve the remaining components in the batching kettle, add distilled water to 500kg to obtain a polymerization solution, and input the polymerization solution into the polymerization kettle, and pour it into the polymerization solution Introduce high-purity nitrogen to drive away oxygen, and at the same time cool down the temperature of the polymerization solution. When the temperature of the polymerization solution drops to 8°C, first add the prepared triethylamine aqueous solution into the polymerization kettle, and then add the prepared 2,3-dimethyl Butane hydrogen peroxide aqueous solution is added in the polymerization kettle, continue to feed high-purity nitrogen after adding, stop passing high-purity nitrogen after 10 minutes, seal the polymerization kettle, make the polym...

Embodiment 2

[0062]

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

Embodiment 3

[0065]

[0066] Each component was weighed according to the above formula, and the initial reaction temperature was controlled at 0°C. Other operating steps were the same as in Example 1, except that the amount of NaOH added during hydrolysis was 30 kg, and the molecular weight of the obtained polymer was 29 million. The viscosity 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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