Patent · US Expired

Sulfalation of tetraol

US6180799A · kind A · utility

10Cited by
4References
3Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 1, 2000
Grant dateJan 30, 2001
Priority date—
Expiry dateMay 1, 2020

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07D497/10
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

Provided are novel methods for preparing pentaerythritol disulfite employing reduced amounts of thionyl chloride and 1,2-dichloroethane as reaction media. Also disclosed is the first synthesis of pentaerythritol disulfate by oxydation of the above pentaerythritol disulfite. Both the disulfite (2) and the disulfate (3) are obtained in high yields.

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