EP 0235929 B1 19911016 - OVERBASED ADDITIVES
Title (en)
OVERBASED ADDITIVES
Publication
Application
Priority
GB 8601990 A 19860128
Abstract (en)
[origin: EP0235929A1] A process for making an oil solution of a highly basic sodium sulphonate which comprises (a) heating sodium hydroxide with an alkoxyalkanol and a solvent to remove as an azeotrope with alkoxyalkanol and said solvent a controlled amount of water formed in the reaction of part of the sodium hydroxide with the alkoxyalkanol; (b) adding to the mixture an organic sulphonic acid so as to react with a part of the sodium hydroxide and form the sodium salt of the sulphonic acid and water; (c) thereafter introducing carbon dioxide into the reaction mixture so as to react with the basic sodium compounds therein; (d) removing solvent by distillation; and (e) adding base oil to the process during one of steps (b), (c) or (d) so that the desired product is obtained, in which the amount of alkoxide produced in step (a) is controlled by the azetropic removal of water in that step such that the amount of water produced in step (b) and (c) is not greater than the amount stoichiometrically required to hydrolyse the alkoxide.
IPC 1-7
IPC 8 full level
C10L 1/24 (2006.01); C10L 10/08 (2006.01); C10M 159/24 (2006.01); C10M 163/00 (2006.01); C10N 10/02 (2006.01); C10N 10/04 (2006.01); C10N 30/04 (2006.01); C10N 30/10 (2006.01); C10N 40/00 (2006.01); C10N 40/25 (2006.01)
CPC (source: EP)
C10L 1/2437 (2013.01); C10M 159/24 (2013.01)
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
EP 0235929 A1 19870909; EP 0235929 B1 19911016; CA 1289547 C 19910924; DE 3773698 D1 19911121; GB 8601990 D0 19860305; JP 2512457 B2 19960703; JP S62190296 A 19870820
DOCDB simple family (application)
EP 87300761 A 19870128; CA 527948 A 19870122; DE 3773698 T 19870128; GB 8601990 A 19860128; JP 1813087 A 19870128