基本信息:
- 专利标题： 生产羟基乙酸的方法
- 专利标题（英）：PROCESS FOR THE PRODUCTION OF GLYCOLIC ACID
- 申请号：CN201780056765.9 申请日：2017-09-15
- 公开(公告)号：CN109715596A 公开(公告)日：2019-05-03
- 发明人： D·罗伯茨 , D·J·沃特森 , J·史文妮
- 申请人： 庄信万丰戴维科技有限公司
- 申请人地址： 英国伦敦
- 专利权人： 庄信万丰戴维科技有限公司
- 当前专利权人： 庄信万丰戴维科技有限公司
- 当前专利权人地址： 英国伦敦
- 代理机构： 中国国际贸易促进委员会专利商标事务所
- 代理人： 王长青
- 优先权： 1615762.0 2016.09.16 GB
- 国际申请： PCT/GB2017/052740 2017.09.15
- 国际公布： WO2018/051115 EN 2018.03.22
- 进入国家日期： 2019-03-15
- 主分类号： C07C51/09
- IPC分类号： C07C51/09 ; C07C51/12 ; C07C59/06 ; C07C67/08 ; C07C67/54 ; C07C69/675
A process for the production of glycolic acid or a derivative thereof comprises: reacting formaldehyde with carbon monoxide and water in a carbonylation reactor in the presence of a sulfurcatalyst, said reactor operating under suitable conditions, such that glycolic acid is formed; recovering a first product stream comprising glycolic acid, impurities and a sulfur species in the carbonylation reactor; passing the first product stream to an esterification reactor where it is subjected to esterification to form an alkylglycolate and wherein the esterification is catalysed by the sulfur species recovered in the first product stream; recovering a second product stream comprising the alkylglycolate, sulfur species and impurities from the esterification reactor; separating the sulfur species from the second product stream and recycling it to the carbonylation reactor in step (a) to form a sulphur depleted second product stream; separating the alkylglycolate from the sulphur depleted second product stream in a distillation zone; and recovering the alkylglycolate and converting the alkylglycolate to glycolic acid.
公开/授权文献:
- CN109715596B 生产羟基乙酸的方法 公开/授权日：2022-05-17