大豆渣在近临界水中水解反应工艺

Hydrolysis technology of soybean residue in sub-critical water

利用近临界水水解技术处理大豆加工业主要副产物之一豆渣,使之转化为附加值较高的氨基酸和还原性糖。研究了反应温度、时间及压力以及CO2气体的加入量等因素对产物收率的影响,探讨了各影响因素的作用机理。结果表明:反应温度及时间对收率影响较大,反应压力对收率影响较小,CO2气体的加入对氨基酸和还原性糖收率都有明显的促进作用。在反应温度200℃,反应时间15 min,CO2分压3 MPa时,氨基酸总收率较大(14.25%);在反应温度为300℃,反应时间8 min,CO2分压3 MPa时,还原性糖收率较大(50.44%)。不同的工艺条件下产物组成不同,可根据实际生产需要调节。

Hydrolysis technology in sub-critical water was used to produce amino acids and reducing sugar from soybean residue.The effects of reaction temperature,time and pressure,and the addition of CO2 on the yields of amino acids and reducing sugar were studied,and the mechanisms of these effects were discussed.The experimental results show that the yields of amino acids and reducing sugar are more affected by reaction temperature and time,and less by pressure.The CO2 can improve the yields of both amino acids and reducing sugar.The optimum hydrolysis conditions for amino acids and reducing sugar production from soybean residue in sub-critical water are as follows： reaction temperature of 200/300 ℃,reaction time of 15/8 min and CO2 partial pressure of 3 MPa.Under these conditions,the yields of total amino acid and reducing sugar reach 14.25% and 50.44% respectively.The composition of products is distinct in different reaction conditions.So by adjusting the technology conditions the desired products can be obtained.