- Preparation method for sulfosuccinic acid
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The invention discloses a preparation method for sulfosuccinic acid, which is characterized in that maleic anhydride is preheated under 70 DEG C to 90 DEG C, and 1.1 to 1.7 equivalent weight of sodiumhydrogen sulfite solution is slowly added into the preheated system; after addition, agitation is continued under 70 DEG C to 90 DEG C for 2 to 10 hours; the obtained reaction solution is sodium sulfosuccinate solution; the solution is added with water, so that 5 to 30 percent of sodium sulfosuccinate solution is prepared, and the sulfosuccinic acid is prepared by strongly acidic ion exchange resin. The advantages of the preparation method are as follows: by the method, a sulfosuccinic acid product, the sodium ion solubility of which is less than 0.05 percent, can be obtained; the materials of the route are simple, the synthetic route is simple and reasonable, the conversion rate of reaction is high, the cost is greatly reduced, and moreover, the whole synthetic route is green and environment-friendly, and is suitable for industrial production.
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Paragraph 0006; 0009; 0010; 0012; 0013; 0015; 0016
(2018/06/21)
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- STRUCTURE OF DISODIUM SALTS OF SULFOSUCCINATE MONOESTERS.
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In continuation of the authors' studies of sulfo- and disulfosuccinates aimed at the synthesis of new acid-resistant surfactants, it became necessary to clarify the structure of DSS (attachment of the -SO//3Na group in the alpha or beta position relative to the -COOH group. For conclusive identification of the position of the substituent in DSS, they carried out several independent investigations: selective synthesis of model compounds, study of their resistance to hydrolysis, and investigation of their acid-base properties. Generalizing the results of investigations of the resistance of model compounds of the alpha and beta forms of DSS to hydrolysis in conjunction with their acid-base properties, the authors can conclude that the alpha isomer of DSS is formed by addition of sodium hydrogensulfite at the double bond of maleate monoesters only at pH greater than 7.
- Panaeva,Ivanov,Stognushko
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p. 1207 - 1211
(2007/10/02)
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