METHOD FOR SEPARATION OF EMULSION PREPARED IN MICROBIOLOGICAL DEWAXING OF PETROLEUM FRACTIONS HAVING DISTILLATION RANGE FROM 230 TO 450

摘要

A method for separation of an emulsion prepared in the process of microbiological dewaxing of petroleum fractions having the distillation range from 230 DEG to 450 DEG C which consists of a mineral aqueous medium, dewaxed product and yeast, consisting in that the emulsion is treated with a 2-5 per cent ammonia-soda solution having the ammonia to soda ratio (by weight) of 1-4 : 4-1. The consumption of the aqueous ammonia-soda solution is 15-50 kg per ton of the starting petroleum fractions. The emulsion is treated with the aqueous ammonia-soda solution at a temperature within the range from 60 to 100 DEG C. After this treatment, the emulsion is separated by settling.