Patent · US Expired

Process for preparing overbased calcium sulfonates

US4086170A · kind A · utility

19Cited by

3References

12Claims

0Family size

Assignee

Labofina, S.A. · BE

Inventors

Georges E. M. J. De Clippeleir · Brugge, BE
Andre Vanderlinden · Brussels, BE

Key dates

Filing date	Feb 1, 1977
Grant date	Apr 25, 1978
Priority date	—
Expiry date	Feb 1, 1997

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC10N2040/253
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Overbased calcium sulfonates and concentrated oily solutions thereof are prepared by reacting a solution of alkylbenzene sulfonic acids with an excess of a calcium oxide having a medium or low activity towards water and with carbon dioxide. Oily solutions of overbased calcium sulfonate obtained from such a calcium oxide are perfectly limpid and are easily filtrable.

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