Abstract:

Because of the method of deacidification of the oil fraction can't solve the problem of the equipment corrosion effectively, the technology of deacidification solvent is used to research the deacidification of the crude oil with high acid number in lab. Comparing with the technique of deacidification of alkali washing for the oil fraction, the technology of deacidification solven of the crude oil with high acid numbe can decrease or banish the naphthenic acid corrossion to equipment, it is of the characteristic of small dosage,low wastage of NaOH,small discharge capacity no emulsification, good adaptability and effect of deacidification ,the rate of deacidification reaches 95%. After the crude oil with acid number of 2.07mgKOH/g is deacidized,the acid number of it's distillation of 180～350℃ is smaller than 10 mgKOH/100ml, so the distillated diesel oil does not need deacidification. The new technique that combinates the desalting with deacidificating is put forward, it is pointed out that the existing equipment can be used to save cost.

Key words: the crude oil with high acid number, deacidification solvent, petroleum acids, researching in lab, facility corrosion proof