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Method for synthesizing diacetone acryloamide and acrylic amide copolymer

A technology of acrylamide copolymer and diacetone acrylamide, which is applied in the field of synthesizing diacetone acrylamide and acrylamide copolymer, can solve the problems of rising production cost, complicated process, and energy consumption, so as to save resources and avoid serious pollution , good chemical stability

Active Publication Date: 2018-07-24
福建省智野实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using solution polymerization, in addition to increasing the process of solvent recovery, the organic or inorganic solvents used are likely to pollute the environment and polymerization products
However, if the aqueous phase precipitation method is used, the reaction product needs to be diluted with deionized water, precipitated with acetone, washed and dried, which not only consumes a large amount of energy, but also complicates the process and increases the production cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 A kind of method for synthesizing diacetone acrylamide and acrylamide copolymer, it comprises the steps:

[0018] Acrylamide with a concentration of 2.3mol / l, diacetone acrylamide with a concentration of 1.7mol / l and an initiator (a mixture of ammonium persulfate and sodium bisulfite with a concentration of 0.1mol / l, the molar ratio of mixing is 1 :1) Add to the reaction kettle separately, seal. Wherein, the molar percentage of diacetone acrylamide in the two monomers is 42.5%, and the molar percentage of acrylamide in the two monomers is 57.5%.

[0019] Carbon dioxide was introduced for 25 minutes to discharge the air in the reactor, so that the initial concentration of the total monomers of diacetone acrylamide and acrylamide was 4 mol / l.

[0020] Then close the inlet and outlet valves of the reactor and heat. When the temperature rises to 30°C, turn on the high pressure pump of the reactor and add a certain amount of carbon dioxide. As the tempe...

Embodiment 2

[0022] Embodiment 2 A kind of method for synthesizing diacetone acrylamide and acrylamide copolymer, it comprises the steps:

[0023] Acrylamide with a concentration of 1.9mol / l, diacetone acrylamide with a concentration of 3.1mol / l and an initiator (a mixture of sodium persulfate and potassium bisulfite with a concentration of 0.2mol / l, the molar ratio of mixing is 1 :1) Add to the reaction kettle separately, seal. Wherein, the mole percentage of diacetone acrylamide in the two monomers is 62%, and the mole percentage of acrylamide in the two monomers is 38%.

[0024] Carbon dioxide was introduced for 25 minutes to discharge the air in the reactor, so that the initial concentration of diacetone acrylamide and acrylamide total monomers was 5 mol / l.

[0025] Then close the inlet and outlet valves of the reactor and heat. When the temperature rises to 30°C, turn on the high pressure pump of the reactor and add a certain amount of carbon dioxide. As the temperature incre...

Embodiment 3

[0027] Embodiment 3 A kind of method for synthesizing diacetone acrylamide and acrylamide copolymer, it comprises the steps:

[0028] Acrylamide with a concentration of 1.1mol / l, diacetone acrylamide with a concentration of 2.2mol / l and an initiator (a mixture of potassium persulfate and ammonium bisulfite with a concentration of 0.25mol / l, the molar ratio of mixing is 1 :1) Add to the reaction kettle separately, seal. Among them, the molar percentage of diacetone acrylamide in the two monomers is 66.67%, and the molar percentage of acrylamide in the two monomers is 33.33%.

[0029] Carbon dioxide was introduced for 25 minutes to discharge the air in the reactor, so that the initial concentration of the total monomers of diacetone acrylamide and acrylamide was 3.3 mol / l.

[0030] Then close the inlet and outlet valves of the reactor and heat. When the temperature rises to 30°C, turn on the high pressure pump of the reactor and add a certain amount of carbon dioxide. A...

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Abstract

The invention discloses a method for synthesizing a diacetone acryloamide and acrylic amide copolymer. A diacetone acryloamide and acrylic amide comonomer is subjected to precipitation polymerizationunder the critical temperature and pressure of carbon dioxide by taking the carbon dioxide as a medium and a persulfate and hydrosulphite redox system as an initiator to obtain the diacetone acryloamide and acrylic amide copolymer. The initial use amount concentration of the initiator is 0.05 to 0.5 mol / l; the total monomer concentration of the diacetone acryloamide and the acrylic amide is 1 to 8mol / l; in the initiator, the persulfate is one of potassium persulfate, sodium persulfate or ammonium persulfate, and the hydrosulphite is one of potassium hydrosulphite, sodium hydrosulphite or ammonium hydrosulphite. The organic solvent is replaced by the non-toxic and pollution-free medium supercritical carbon dioxide, so environmental pollution caused by use of toxic, harmful, volatile and combustible organic solvents is avoided, and the effects of environmental friendliness, energy conservation and resource conservation can be realized.

Description

technical field [0001] The invention relates to a method for synthesizing diacetone acrylamide and acrylamide copolymer, in particular to a method for synthesizing diacetone acrylamide and acrylamide copolymer with supercritical carbon dioxide as a solvent. Background technique [0002] The existing methods for synthesizing copolymers of diacetone acrylamide and acrylamide generally adopt solution polymerization, or carry out aqueous phase precipitation polymerization in water. In solution polymerization, in addition to increasing the process of solvent recovery, the organic or inorganic solvents used are likely to pollute the environment and polymerization products. However, in the aqueous phase precipitation method, the reaction product needs to be diluted with deionized water, precipitated with acetone, washed and dried, which not only consumes a large amount of energy, but also complicates the process and increases the production cost. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F220/58C08F2/12
CPCC08F2/12C08F220/06C08F220/58Y02P20/54
Inventor 兰平吕佳
Owner 福建省智野实业有限公司
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