Process for the separation of 2-alkene-1,4-diols and 3-alkene-1,

Details Process for the separation of 2-alkene-1,4-diols and 3-alkene-1, Process for the separation of 2-alkene-1,4-diols and 3-alkene-1,

1997-07-08

1999-01-05

Shippen, Michael L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C07C 3118

Patent

active

058565914

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.

REFERENCES:
patent: 5530167 (1996-06-01), Tustin
Ross et al., "Vinyl Epoxide Hydrolysis Reactions," J. Am. Chem. Soc., vol. 102, pp. 1658-1665 (1982).
CA 101: 110030w (1984).
CA 96: 180770q (1982).
10G-13 Heterocyclic Compounds, 18462 (1960).
CA 91: 210877w (1979).
Compilation from SciFinder, pp. 1-6 and 1-4 (1997).
Derwent Abstracts, AN 95-099801.
Derwent Abstracts, AN 94-201497.
Derwent Abstracts, AN 95-099804.
Derwent Abstracts, AN 95-099803.
O. Fujimura, et al, Journal of Organic Chemistry, vol. 55, No. 6, 16 Mar. 1990, pp. 1705-1706.
M. Chini, et al., Tetrahedron, vol. 48, No. 18, 1 May 1992, pp. 3805-3812.

Affiliated with

Also associated with

Rating

Process for the separation of 2-alkene-1,4-diols and 3-alkene-1, does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the separation of 2-alkene-1,4-diols and 3-alkene-1,, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the separation of 2-alkene-1,4-diols and 3-alkene-1, will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-864443