GB1289003A - - Google Patents

Abstract

1289003 Overbased, carbonated calciumcontaining micellar complexes LUBRIZOL CORP 15 July 1970 34378/70 Heading C2C The invention comprises a solid, calciumcontaining micellar complex substantially free from organic liquid diluent and which is capable of being stably dispersed in a non-polar organic liquid upon admixing with said liquid, said complex consisting of calcium carbonate and at least one alkaline earth metal salt, preferably the calcium salt, of an organic acid, preferably a carboxylic or sulphonic acid containing at least seven carbon atoms, the equivalent ratio of calcium present in said complex as calcium carbonate to alkaline earth metal present being from 2 : 1 to 100 : 1; said complex being further characterized by X-ray diffraction patterns corresponding to that of calcite having an average crystallite size within the range 25 Š to 400 Š. It may be prepared by homogenizing a carbonated calcium-overbased organic acid salt having a metal ratio of at least 3 which is homogeneously dispersed in a substantially inert non-polar organic liquid diluent in the presence of water and/or a C 1-12 alcohol and thereafter separating from the resulting homogenized product substantially all of the non-polar organic liquid diluent, alcohols and water from the remainder of the reaction mixture thereby isolating the micellar complex, e.g. by precipitation by adding an inert non-polar organic liquid, e.g. a ketone or alcohol. In examples (1) a mixture of fatty acids distilled from tall oils acids and including 44% linoleic and 52% oleic acids and (2) an alkylated benzene sulphonic acid of average weight 480, are first converted into their carbonated over-based calcium salts, these are homogenized by agitating in the presence of water and/or a C 1-12 alcohol to form in general a thick gel, and after removal of diluent, water and alcohol the solid complex is precipitated by addition of an alcohol or ketone.