- 专利标题： Method for preparing 2-hydroxy-4-methylthiobutyronitrile or the selenium equivalent thereof, and applications
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申请号： US18280388申请日： 2022-03-04
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公开(公告)号： US20240076267A1公开(公告)日： 2024-03-07
- 发明人: Virginie BELLIERE-BACA , Aymeric GUINAUDEAU
- 申请人： ADISSEO FRANCE S.A.S.
- 申请人地址： FR ANTONY
- 专利权人： ADISSEO FRANCE S.A.S.
- 当前专利权人： ADISSEO FRANCE S.A.S.
- 当前专利权人地址： FR ANTONY
- 优先权： FR 2102123 2021.03.04
- 国际申请： PCT/FR2022/050388 2022.03.04
- 进入国家日期： 2023-09-05
- 主分类号： C07C319/20
- IPC分类号： C07C319/20 ; C07C319/28
摘要：
A method for the preparation of the 2-hydroxy-4-methylthiobutyronitrile (HMTBN) or its selenium equivalent (HMSeBN) from hydrocyanic acid and 3-methylthiopropanal (MTP) or the corresponding selenium aldehyde (MSeP) includes the following steps: the molar ratio of the HCN to MTP or to MSeP is adjusted to a value greater than or equal to 1 and the pH is adjusted and maintained at a value greater than or equal to 3.5, to obtain a reaction medium in which the HMTBN or the HMSeBN is formed, then the pH of the reaction medium is lowered to a value less than or equal to 2.5 and the HCN is extracted from the reaction medium, and the HMTBN or the HMSeBN is recovered. The applications of this method are also related.
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