| 摘要 |
A method of treating edible oil comprising: driving a stream of about 70 to about 99.9 wt. % of an edible oil and about 0.1 to about 30 wt. % of a 0.01 to 6.5 Normal aqueous alkali solution, through an interfacial surface mixer at a predetermined mean droplet diameter of the aqueous alkali (phase) in said stream, which is related to a predetermined Reynolds number, said stream having a mixing temperature of from about 3 DEG C. to about 60 DEG C., and thereby mixing and reacting said oil and said alkali to provide a reacted aqueous alkali phase and a reacted oil phase, and then separating said reacted oil from said reacted aqueous alkali. The residence mixing and reacting time of the oil and alkali stream in the mixer is about five seconds: thus, the method of this invention is faster and more efficient than corresponding prior art oil alkali treatment processes. Neutral oil loss is reduced up to 80% and mixing energy required is reduced up to 98% over corresponding prior art. The predetermined alkaline solution phase droplet size generated in the mixer is calculated to be small enough to react with the oil and thereby provide the desired results, i.e., the refining of crude oil, the dewaxing of refined oil or the combined refining and dewaxing of crude oil. The droplet should however not be so small so as to generate an emulsion.
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