Method for synthesizing medium-long-chain structure ester by enzymic method
An enzymatic synthesis, medium and long chain technology, applied in the field of oil and ester synthesis and modification, can solve the problems of high production of by-products, large amount of enzyme, and high acid value, so as to reduce the amount of enzyme, reduce the amount of production, and improve economic benefits. Effect
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Embodiment 1
[0021] Take 6.4 kg of soybean oil as the raw material of long-chain triglycerides, 3.6 kg of caproic acid triglycerides as the raw material of medium-chain triglycerides, add the immobilized lipase Lipozyme TL which is 2% by weight of the total oils and esters, which is ground and passed through a 100-mesh sieve IM was used as a catalyst, vacuum stirred and heated to reflux in a 65°C water bath for 4 h, and the stirring rate was 100 r / min. After the reaction was completed, the immobilized lipase was removed by vacuum filtration with double-layer filter paper to obtain a medium-long chain structure ester sample, and the sample was determined The MLCT content is 76.31%, the acid value is 4.24 mg / g, and the diglyceride content is 7.10%.
Embodiment 2
[0032] Take 6.4 kg tea seed oil as the long-chain triglyceride raw material, 2.0 kg caprylic triglyceride as the medium-chain triglyceride raw material, add the immobilized lipase Lipozyme RL IM which is ground and passed through 80 mesh sieve with 2% of the total oil weight As a catalyst, it was heated and refluxed in a water bath at 45°C for 4 h under vacuum stirring at a stirring rate of 100 r / min. After the reaction was completed, the immobilized lipase was removed by vacuum filtration with double-layer filter paper to obtain a medium-long chain structure ester sample. The MLCT content is 65.33%, the acid value is 9.46mg / g, and the diglyceride content is 10.01%.
Embodiment 3
[0034] Take 6.4 kg of olive oil as the raw material of long-chain triglycerides, 3.6 kg of capric triglycerides as the raw material of medium-chain triglycerides, add the immobilized lipase Lipozyme 435 which is ground and passed through a 200-mesh sieve with 2% of the total oil weight as the Catalyst, vacuum stirring and heating under 80°C water bath for 1 h, the stirring rate is 30 r / min, after the reaction is completed, the immobilized lipase is removed by vacuum filtration with double-layer filter paper, and the ester sample with medium and long chain structure is obtained, and the MLCT in the sample is determined. The content is 74.88%, the acid value is 7.74 mg / g, and the diglyceride content is 8.40%.
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