Method for manufacturing .alpha.-sulfo fatty acid ester salt
US4021460A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1975 |
| Grant date | May 3, 1977 |
| Priority date | — |
| Expiry date | Oct 7, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for manufacturing .alpha.-sulfo fatty acid ester salt which comprises the steps of sulfonating a mixture of 100 parts by weight of saturated fatty acid alkyl ester having 9 to 26 carbon atoms and less than 10 parts by weight of inorganic sulfate by sulfonating gas containing 1.0 to 2.0 mols of SO.sub.3 per mol of said fatty acid ester and diluted to a concentration of 3 to 20% by volume by inert gas at a higher reaction temperature than the solidification point of said fatty acid ester, followed by neutralization by caustic alkali. According to this method, an amount of by-product yielded by breakage of an ester linkage is decreased with the resultant lowered coloration of the product. .alpha.-sulfo fatty acid ester salt is used preferably as an active component for a detergent composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.