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ChemicalBook CAS DataBase List 2-METHYL-2-PROPENE-1-SULFONIC ACID SODIUM SALT

2-METHYL-2-PROPENE-1-SULFONIC ACID SODIUM SALT synthesis

3synthesis methods
The synthesis of 2-METHYL-2-PROPENE-1-SULFONIC ACID SODIUM SALT is as follows:The neutralization was carried out with sodium carbonate to pH 7. The neutralized filtrate was evaporated under reduced pressure (20 mmHg) to remove water and to obtain 46.5 g of white crystalline sodium methallyl sulfonate. The product was identified with a standard sample by IR spectrum. The purity of the product was 95.5% and the yield 95%.

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Yield:-

Reaction Conditions:

with sodium hydroxide in water at 50; for 0.2 h;Product distribution / selectivity;

Steps:

3; 4

The reaction solution obtained from Example 2 was neutralized by adding 30% strength aqueous sodium hydroxide dropwise at 50° C. over a period of 0.5 h. The yield of sodium methallylsulfonate in the reaction mixture is 95.2% based on the sulfur trioxide-DMF complex. 330 g of DMF (10%) were lost as a result of hydrolysis.; Example 4 InventiveThe reaction mixture obtained from Example 2 was admixed at 50° C. with 1.6 kg of water. The mixture was subsequently neutralized at 50° C. by means of 30% strength aqueous sodium hydroxide. The yield of sodium methallylsulfonate in the reaction mixture was likewise 95.2% based on the sulfur trioxide-DMF complex. The loss of DMF as a result of hydrolysis was less than 0.3%.

References:

US6864388,2005,B2 Location in patent:Page/Page column 7

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