C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 37/82 (2006.01) C08F 6/08 (2006.01) C08F 110/10 (2006.01)
Patent
CA 2325962
A method for removing boron from a boron trifluoride-catalyzed polyalkyl hydroxyaromatic reaction product which comprises: (a) diluting the polyalkyl hydroxyaromatic reaction product with an inert solvent to give a polyalkyl hydroxyaromatic reaction product concentration in the range of about 40 to about 80 weight percent; (b) filtering the diluted polyalkyl hydroxyaromatic reaction product in the presence of a filter aid in combination with (1) magnesium silicate, (2) water or (3) a mixture of magnesium silicate and water; wherein the water is present during filtration at a concentration of about 100 to 1,500 ppm, based on the diluted polyalkyl hydroxyaromatic reaction product; with the proviso that when water is used in the absence of magnesium silicate, the filter aid is diatomaceous earth; and (c) recovering a filtrate containing the diluted polyalkyl hydroxyaromatic reaction product having less than about 10 ppm of boron present.
Gray James
Triconnet Thierry
Chevron Oronite Company Llc
Chevron Oronite S.a.
Sim & Mcburney
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