| 发明名称 |
METHOD AND APPARATUS FOR PREPARATION OF LACTIDE USING LACTIDE PURIFICATION PROCESS |
| 摘要 |
The present invention relates to a method and apparatus for preparation of lactide using a lactide purification process, comprising introducing an aqueous solution comprising lactic acid into a reactor filled with a catalyst and reacting the same to produce crude lactide vapor; and purifying the crude lactide vapor to produce lactide crystals, wherein a first purification comprises collecting and crystallizing the crude lactide vapor using a first solvent to produce lactide crystals, and separating the lactide crystal from a residue through filtration. |
| 申请公布号 |
US2017101390(A1) |
申请公布日期 |
2017.04.13 |
| 申请号 |
US201615290647 |
申请日期 |
2016.10.11 |
| 申请人 |
KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY |
发明人 |
HWANG Dong Won;CHANG Jong San;HWANG Young Kyu;LEE U Hwang;HONG Do Young;LEE Su Kyung;CHO Kyung Ho;UPARE Pravin Pandharinath |
| 分类号 |
C07D319/12;B01D3/00;B01D39/00;B01J8/02;B01D9/00 |
主分类号 |
C07D319/12 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for preparing lactide comprising:
(i) introducing an aqueous solution comprising lactic acid into a reactor filled with a catalyst and reacting the same to produce crude lactide vapor; and (ii) purifying the crude lactide vapor produced in the step (i) to produce lactide crystals, wherein the step (ii) comprises: (ii-a) collecting and crystallizing the crude lactide vapor using a first solvent to produce lactide crystals, and (ii-b) separating the lactide crystals from a residue through filtration. |
| 地址 |
Daejeon KR |
