Title:
【発明の名称】2―アルケン―1,4―ジオール及び3―アルケン―1,2―ジオールの触媒からの分離方法
Document Type and Number:
Japanese Patent JP2002513377
Kind Code:
A
Abstract:
This invention pertains, firstly, to the use of mixtures of hydriodic acid and organic solvent soluble iodide salts as catalysts for the hydration of gamma , delta -epoxyalkenes to form a mixture of the corresponding 2-alkene-1,4-diol and 3-alkene-1,2-diol isomers. Secondly, this invention describes the use of pH to control the 2-alkene-1,4-diol/3-alkene-1,2-diol product ratio, and achieve improved 2-alkene-1,4-diol selectivities by controlling the pH to near neutral values. Thirdly, this invention includes a catalyst recovery process whereby a liquid/liquid extraction is used to separate the product from the catalyst. In this extraction, gamma , delta -epoxyalkene, or a gamma , delta -epoxyalkene-containing organic solvent, is used to extract the catalysts from water, leaving the diol products in the aqueous phase, from which they may be subsequently recovered by distillation, extraction or by other means.
Inventors:
Mackenzie, Peter, Bee.
Cannel, Jeffrey, S.
Falling, Stephen, N.
Cannel, Jeffrey, S.
Falling, Stephen, N.
Application Number:
JP50626998A
Publication Date:
May 08, 2002
Filing Date:
July 16, 1997
Export Citation:
Assignee:
Eastman Chemical Company
International Classes:
C07C29/86; C07C29/88; C07C33/035; (IPC1-7): C07C29/86; C07C33/035
Attorney, Agent or Firm:
Takashi Ishida (4 others)