Method for continuously catalyzing grease exchange by immobilized strong base

• Main Authors: FENG YILANG, WAN JIAN, YUAN XIANGHUA
• Format: Patent
• Language: Chinese; English
• Published: 25.04.2023
• Subjects: ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; CANDLES; CHEMISTRY; DETERGENTS; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS,OILS, OR FATTY ACIDS OBTAINED THEREFROM; FATTY ACIDS FROM FATS, OILS OR WAXES; FATTY ACIDS THEREFROM; METALLURGY

The invention relates to the technical field of food processing, in particular to a continuous immobilized strong base catalytic grease exchange method which comprises the following steps: preparing calcium oxide solid base; impregnating the prepared calcium oxide solid alkali in an alkali metal chloride solution for 10-40 minutes by using an equivalent-volume impregnation method; drying for 20-30 hours at the temperature of 60-75 DEG C under the vacuum condition; calcining the treated calcium oxide solid alkali at 500-600 DEG C for 2-8 hours, loading 0.5-1.5% of the treated calcium oxide solid alkali on a polyethylene molecular sieve, and then filling a column; and heating the mixed grease to 120-150 DEG C, preserving heat, and passing through a column to obtain the transesterification oil. The method has the characteristics of mild reaction conditions, easiness in product separation, no product pollution, no need of subsequent washing and the like, can realize continuous production, does not generate a larg