A type of production method of high-content Pure Beta Sitosterol, with the grease deodorization distillate having 4 ~ 7% β-sitosterol as resources, comprises esterification, alcoholysis, short-range splitting up, cold evaluation, filtration, filter cake cleaning, vacuum cleaner drying out step, is identified in that:
( 1) Esterification: take the ventilated extract in the grease refining process as basic material, usage acid as stimulant, take methanol as reaction solvent, solvent weight is 30% ~ 40% of raw material quantity, as well as driver weight is 0% of raw material weight.06 ~ 0.07 times, at 70 ~ 80 ℃, accomplish esterification reaction 3 ~ 4 hrs, leave dead stop, separate as well as remove unreacted solvent as well as driver mixed service;
( 2) alcoholysis: include alkali stimulant and reaction solvent methanol in the esterified oil gotten after the reaction, the weight of alkali catalyst is 0.01 ~ 0.015 times of basic material weight, and solvent weight is 0.15 ~ of basic material weight 0.20 times amount, temperature 70 ℃ ~ 80 ℃, execute alcoholysis reaction 1 ~ 2 hour;
( 3) cleaning: those reaction item is washed 3 to 4 times with warm water of 70 to 80 ° C., till the pH is 8 to 7;
( 4) short-range splitting up: the response item after above-mentioned cleaning goes to 150 ~ 160 DEG C, under 50 ~ 100 1/2 vacuum cleaner, by short-range distillation splitting up device, feeds 4 ~ 5 litres per minute, divides fatty acid methyl ester;
( 5) cold evaluation, filtration: the heavy component after above-mentioned distillation goes into filter press filter when 70 ~ 80 ℃, eliminates contamination, as well as filtrate enters cool analysis kettle, includes regulator and also carries out cold analysis, as well as regulatory authority is made from 10% sulfuric acid Type by 1: 2.5 ~ 3.5 weight proportion proportioning with water, the weight ratio of hefty component and regulatory authority is 1: 0.03 ~ 0.04, chilly evaluation is to 30 ~ 40 ℃, press filtration obtains crude product β-sitosterol;
( 6) cleaning, vacuum drying out: filter cake after prior purification, include ethanol as well as laundry under regular temperature level mixing, filter solvent, completely dry to obtain the β-sitosterol ended up product that web content is greater than 80% via 70 ~ 80 ℃ of drying out.