发明名称 |
Process and Apparatus for Purification of a Stream Containing a Cyclic Ester of an Alpha-Hydroxycarboxylic Acid |
摘要 |
The invention relates to a process for purification of a stream containing a cyclic ester of an alpha-hydroxycarboxylic acid of formula (I), wherein each R independently represents hydrogen or an aliphatic hydrocarbon having 1 to 6 carbon atoms comprising the steps of: (a) separating the cyclic ester-containing stream into one or more cyclic ester-containing vapour fractions and one or more cyclic ester-containing liquid fractions; (b) condensing a cyclic ester-containing vaporized fraction as obtained in step (a) to obtain a cyclic ester-containing condensate; (c) subjecting at least part of the cyclic ester-containing condensate as obtained in step (b) to melt crystallization to obtain a purified cyclic ester-containing stream and a residue stream; and (d) recovering the purified cyclic ester-containing stream as obtained in step (c). The invention further relates to an apparatus suitable for carrying out the present process. |
申请公布号 |
US2016024043(A1) |
申请公布日期 |
2016.01.28 |
申请号 |
US201414773697 |
申请日期 |
2014.02.04 |
申请人 |
SULZER CHEMTECH AG ;FUTERRO S.A. |
发明人 |
Stepanski Manfred;Fässler Peter;Coszach Philippe |
分类号 |
C07D319/12;B01D3/14;B01D9/00;B01D3/02 |
主分类号 |
C07D319/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
Winterthur CH |