EP 0121024 B1 19870318 - PREPARATION OF OVERBASED CALCIUM SULPHONATES
Title (en)
PREPARATION OF OVERBASED CALCIUM SULPHONATES
Publication
Application
Priority
GB 8235018 A 19821208
Abstract (en)
[origin: EP0121024A1] The problem of sludge formation is avoided in the preparation of high base number calcium sulphonates in good yields by carbonating a mixture of: a) an oil-soluble sulphonic acid or an alkaline earth metal sulphonate, b) a hydrocarbon solvent c) a C1-15 alcohol, preferably methanol, d) oil, and e) excess calcium hydroxide, at a temperature not exceeding 35 DEG C, heat soaking the carbonated mixture, and then separating the heat soaked product into an alcohol/water phase and a solvent/oil phase. The alcohol/water phase is removed before stripping the solvent/oil phase to yield the overbased product.
IPC 1-7
IPC 8 full level
C07C 309/01 (2006.01); C07C 67/00 (2006.01); C07C 301/00 (2006.01); C10M 159/24 (2006.01); C10N 10/04 (2006.01); C10N 20/02 (2006.01); C10N 30/04 (2006.01); C10N 40/25 (2006.01); C10N 70/00 (2006.01)
CPC (source: EP)
C10M 159/24 (2013.01)
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
EP 0121024 A1 19841010; EP 0121024 B1 19870318; BR 8306730 A 19840717; CA 1205819 A 19860610; DE 3370356 D1 19870423; JP H0469200 B2 19921105; JP S59139354 A 19840810; SG 67087 G 19880219
DOCDB simple family (application)
EP 83307343 A 19831202; BR 8306730 A 19831207; CA 442770 A 19831207; DE 3370356 T 19831202; JP 23044783 A 19831206; SG 67087 A 19870818