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A kind of preparation method of n,n-dimethylallyl propane sulfonate

A technology of dimethylallyl propane sulfonate and dimethyl allyl amine is applied in the field of preparation of N,N-dimethylallyl propane sulfonate, which can solve the problems of temperature resistance and limitation Development and other issues, to achieve the effect of short reaction time, high product yield and simple operation

Active Publication Date: 2017-06-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because its structure contains ester groups that are easy to hydrolyze and are not temperature-resistant, its development in the field of high-temperature resistance is limited, especially the use of high-temperature-resistant polymers in the field of drilling fluids

Method used

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  • A kind of preparation method of n,n-dimethylallyl propane sulfonate

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Effect test

Embodiment 1

[0016] Weigh 430gDA and pour it into the reactor, then put it into a constant temperature water bath, heat and start stirring. Then weigh 122g PS, add it directly into DA, the reaction temperature is 45°C, stir and react for 3h to get the crude product of DAPS. Transfer the crude DAPS product to a large piece of filter paper, wrap it in a Soxhlet extractor, and use ethanol as a solvent to extract for 3 hours. After the extraction, put the filter paper bag in a drying box and dry it at 50°C to obtain Pure DAPS monomer with a yield of 92.6%. (The yield is the ratio of the mass of the product actually obtained to the mass of the theoretical product obtained by the stoichiometric reaction, the same below).

Embodiment 2

[0018] Weigh 680gDA and pour it into the reactor, then put it into a constant temperature water bath, heat and start stirring. Then weigh 122g PS, add it directly into DA, the reaction temperature is 55°C, stir and react for 3h to get the crude product of DAPS. Transfer the crude DAPS product to a large piece of filter paper, wrap it in a Soxhlet extractor, and use ethanol as a solvent to extract it for 2 hours. After the extraction, put the filter paper bag in a drying box and dry it at 50°C to obtain Pure DAPS monomer with a yield of 91.2%.

Embodiment 3

[0020] Weigh 460gDA and pour it into the reactor, then put it into a constant temperature water bath, heat and start stirring. Then weigh 122g PS, add it directly into DA, the reaction temperature is 40°C, stir and react for 2h to get the crude product of DAPS. Transfer the crude DAPS product to a large piece of filter paper and wrap it in a Soxhlet extractor. Use ethanol as the solvent to extract for 2.5 hours. The pure DAPS monomer was obtained with a yield of 92.4%.

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Abstract

The invention discloses a preparation method of N,N-dimethylallyl propanesulfonate, and is characterized in that the preparation method includes the following contents: firstly, respectively weighing N,N-dimethylallylamine and 1,3-propanesultone with the molar ratio of 2:1-8:1, and adding 1,3-propanesultone to N,N-dimethylallylamine; then at the temperature of 10 DEG C-60 DEG C, carrying out a reaction for 0.5-4 h; and finally, filtering, extracting, and drying to obtain N,N-dimethylallyl propanesulfonate. The method has the advantages of no need of use of a solvent, short reaction time and high product yield and is suitable for industrial application.

Description

technical field [0001] The invention relates to a preparation method of N,N-dimethylallyl propanesulfonate. Background technique [0002] N,N-Dimethylallylpropanesulfonate (DAPS) is a new type of zwitterionic internal salt monomer, its molecular formula is: C 8 h 17 NO 3 S, molecular weight: 207.29, molecular structure formula is as follows: [0003] [0004] DAPS is a white powdery solid, easily soluble in water and slightly soluble in most organic solvents. As a new type of water-soluble amphoteric monomer, DAPS has good chemical and thermal stability, strong hydration ability, and contains an equal number of quaternary ammonium cations and sulfonate anions that are not easily affected by the pH value of the solution and are insensitive to salt. much attention. DAPS have unique properties compared to water-soluble anionic or cationic polymers that contain only one charge. In terms of the nature of the force between molecules and within the molecular chain, for pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C309/14C07C303/32
Inventor 杨超鲁娇陈楠张志智尹泽群刘全杰
Owner CHINA PETROLEUM & CHEM CORP
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