公开(公告)号：CA1101431A

公开(公告)日：1981-05-19

申请号：CA304629

申请日：1978-06-01

Applicant: BASF AG

Inventor： SCHULZ BERNHARD ,  GRAFEN PAUL ,  SCHOLZ HANS-ULRICH ,  GRASSNER HANS ,  REIF WERNER

IPC: C07F9/54

Abstract: Aqueous solutions of polyenyltriarylphosphonium salts are prepared from solutions of the corresponding polyenyltriarylphosphonium salts in organic solvents by driving off the solvent with stem, part of the steam being allowed to condense. Some of the said triarylphosphonium salts may be used directly as pesticides whilst others are used as intermediates for organic syntheses, especially in the cartinoid field.

公开(公告)号：CA1099745A

公开(公告)日：1981-04-21

申请号：CA317897

申请日：1978-12-13

Applicant: BASF AG

Inventor： GRAFEN PAUL ,  SCHOLZ HANS-ULRICH ,  SCHULZ BERNHARD

IPC: C07C29/76 ,  C07C27/00 ,  C07C29/80 ,  C07C29/84 ,  C07C31/04 ,  C07C43/30 ,  C07C67/00 ,  C07C401/00 ,  C07C403/00 ,  C07C403/08 ,  C07C403/12 ,  C07F9/53

Abstract: of the disclosure: A process for treating residues which result from the Wittig synthesis of olefins and which consist principally of methanol, triphenylphosphine oxide, salts and organic by-products, by steam-stripping the volatile constituents, with partial condensation of the steam, and separating the resulting aqueous-organic mixture at 80-100.degree.C into a saline aqueous phase and an organic phase containing principally triphenylphosphine oxide. Using this process provides a simple method of freeing, from triphenylphosphine oxide and other organic impurities, the effluent from syntheses which result in the formation of triphenylphosphine oxide, and thereby on the one hand substantially facilitates the purification of the effluent and on the other hand provides a simple method of recovering the triphenylphosphine oxide. The latter compound, which is easily purified by distillation or recrystallization, can then be used, for example, to prepare the triphenylphosphine required for Wittig syntheses or to prepare the triphenylphosphine dichloride required for the synthesis of pesticides.