Patent · US Expired

Process for obtaining colorless and stable isophorone

US4248673A · kind A · utility

3Cited by
2References
10Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJan 30, 1979
Grant dateFeb 3, 1981
Priority date—
Expiry dateJan 30, 1999

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07C2601/16
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

A process for obtaining colorless and stable isophorone is characterized by distilling a raw synthesis mixture to remove alkaline agents, acetone, and a major portion of the water which is present, thermally treating the distilled mixture with an acidic ion-exchanging resin, neutralizing the effluent following said thermal treatment with an excess of an alkaline agent, adding water in a volume sufficient to dissolve any salts which may have formed, then again, neutralizing the now alkaline mixture wherein the pH of the resultant mixture is between 6.5 and 7, washing the mixture in water by decantation, and distilling the mixture under reduced pressure.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.