C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 57/02 (2006.01) C07C 51/487 (2006.01) C08G 85/00 (2006.01)
Patent
CA 2149436
2149436 9412459 PCTABS00032 In a process for the preparation of a trimer acids product of improved (lighter) colour than the starting product, a highly viscous trimer acids product of dark colour (Gardner colour (1963) greater than 13) is mixed with an amount of monocarboxylic acid which is sufficent to obtain a mixture of trimer acids and monocarboxylic acids having a viscosity low enough to allow in a following step of the process hydrogenation of the mixture of trimer acids and monocarboxylic acids in the presence of a hydrogenation catalyst and ready removal of the catalyst after hydrogenation, after which the hydrogenated mixture is separated by distillation in a first fraction containing predominantly monocarboxylic acid and a second fraction comprising trimer acids of a colour which is substantially lighter (Gardner colour (1963) smaller than 9) than the colour of the trimer acids starting product.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Unichema Chemie B.v.
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