Production method for 2-acryloylamino-2-methylpropane sulfonic acid

Abstract

The invention relates to a method for synthesizing a chemical substance, in particular to a production method for 2-acrylamide-2-methyl propyl sulfonic acid. The method comprises the following steps that: A) firstly, 150 to 180 weight portions of acrylonitrile is added into a reactor, then 30 to 50 weight portions of sulfuric acid with the concentration of between 95 and 100 percent is stirred and synchronously added into the reactor, isobutene is aerated when the adding amount of the sulfuric acid is up to between 15 and 25 percent of the total amount, the reaction temperature is controlled between 10 and 40 DEG C, the produced pasty product is cooled to the room temperature and is separated and dried by a centrifuger to obtain a crude product of 2-acrylamide-2-methyl propyl sulfonic acid. The method adds an organic sulfonate during the reaction, which not only suppresses secondary reactions but also makes the product have larger crystal size with easy centrifugal separate, is convenient to realize the industrial production, and has high purity and yield.

Description

The production method of 2-acrylamido-2-methylpropanesulfonic acid technical field The invention relates to a method for synthesizing chemical substances, in particular to a method for producing 2-acrylamido-2-methylpropanesulfonic acid. Background technique 2-Acrylamido-2-methylpropanesulfonic acid (AMPS for English abbreviation) has carbon-carbon double bonds, carboxyl groups and sulfonic acid groups in the molecule, endowing it with excellent unique properties. The carbon-carbon double bond can make the molecule itself or with other molecules homopolymerize and copolymerize to form a high polymer; the carboxyl group makes the molecule have excellent adsorption and complexation; the sulfonic acid group makes the molecule have excellent water solubility and salt resistance, And it has excellent stability; and 2-acrylamido-2-methylpropanesulfonic acid is currently the only amidosulfonic acid monomer that can produce high molecular weight polymers, and it is also widely use...

AI Technical Summary

Problems solved by technology

Although the production technology of continuous production of high-purity 2-acrylamido-2-methylpropanesulfonic acid is very si...