In order to produce high-quality first-grade soybean oil,with crude soybean oil as raw material,first-grade soybean oil was produced using deep enzymatic degumming,pre-decolorization,packed tower and plate tower deodorization,and double catchers processes.For crude soybean oil with phosphorus content of 600-800 mg/kg,PLC,PLA1/PLA2 were used for degumming,low acidic active clay was used for decolorization,packed tower was used for deacidification,and then an 8-layer plate tower was used for deodorizing microcomponent and the deodorization conditions were temperature 230-240℃(adjustable),vacuum degree 100-150 Pa,and time 100 min(adjustable),and double catchers were used to capture distillates with VE content 10%-12%and acid value 40-50 mgKOH/g,and VE content less than 1%and acid value 130-140 mgKOH/g.Using this process,the contents of 3-chloropropanol ester,2-chloropropanol ester,glycidyl ester and trans fatty acid in first-grade soybean oil were 678.9,310.3,860 μg/kg and 0.886%,respectively,and the refining yield increased by about 2%.
关键词
深度酶法脱胶/物理精炼/3-氯丙醇酯/缩水甘油酯/反式脂肪酸
Key words
deep enzymatic degumming/physical refining/3-chloropropanol ester/glycidyl ester/trans fatty acid
维普
万方数据