METHOD FOR HAZE MITIGATION AND FILTERABILITY IMPROVEMENT FOR GAS-TO-LIQUID HYDROISOMERIZED BASE STOCKS

摘要

Haze formation in heavy Gas-to-Liquids (GTL) base stock is mitigated by theaddition to said GTL base stock of one or more particular additives, forinstancepolymer II which is a mixture of(a) wherein R8 is C10 to C12 alkyl and mixtures thereof,x is oxygen or nitrogen and s+t together are sufficient to produce theco-polymer having a weight average molecular weight of 800 to 1000, and(b) BIGwherein R9 is C12 to C14 alkyl and mixtures thereof,X is oxygen or nitrogen wherein at least some percentage of x is nitrogen,and u and v together are sufficient to produce the copolymer having a weightaverage molecular weight of 7000 to 8,000 and (a) and (b) are in a ratio ofabout60:40.