公开(公告)号：EP0140710A3

公开(公告)日：1985-11-27

申请号：EP84307481

申请日：1984-10-30

申请人： UNILEVER NV

发明人： Baker, Clifford Keith ,  van Dijk, Pieter Mari ,  Griffin, David Arthur ,  Helmond, Johannes ,  Rand, John Arthur ,  Stanley, Christopher Paul ,  Stenton, Neil ,  Tombs, Christopher

IPC分类号： C07C139/12 ,  C07C143/12 ,  C11D01/12 ,  C07C143/525

CPC分类号： C07C309/00 ,  C11D1/123

摘要： Dialkyl sulphosuccinates containing less than 0.3% maleate/fumarate may readily be prepared at high concentrations (77-90% by weight) by the sulphitation of the corresponding dialkyl maleates/fumarates in a mixture of C 1 -C 4 alcohol and water, without the need for other solvents or special catalysts, because at this very high concentration level there exist coinciding regions of low viscosity at both reaction and storage temperatures. The sulphiting agent is used in solid form, and inorganic solids are removed by filtration or other physical separation methods at the end of the reaction.

公开(公告)号：EP0130818A3

公开(公告)日：1985-08-14

申请号：EP84304478

申请日：1984-06-29

申请人： UNILEVER NV

发明人： Rand, John Arthur ,  Stanley, Christopher Paul

IPC分类号： C07C143/12 ,  C11D01/28

CPC分类号： C07C309/00 ,  C11D1/123

摘要： C 4 -C 16 dialkyl sulphosuccinates are prepared as 30-50% by weight aqueous compositions at reaction temperatures above 85°C. In order to prevent a sudden large viscosity rise on cooling below 75°C, urea (10 to 30% by weight based on the dialkyl sulphosuccinate) is added to the reaction mixture as it cools.