Invention Grant
- Patent Title: Method and apparatus for preparation of lactide using lactide purification process
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Application No.: US15290647Application Date: 2016-10-11
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Publication No.: US10253012B2Publication Date: 2019-04-09
- Inventor: Dong Won Hwang , Jong San Chang , Young Kyu Hwang , U Hwang Lee , Do Young Hong , Su Kyung Lee , Kyung Ho Cho , Pravin Pandharinath Upare
- Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY
- Applicant Address: KR Daejeon
- Assignee: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY
- Current Assignee: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY
- Current Assignee Address: KR Daejeon
- Agency: Norton Rose Fulbright US LLP
- Priority: KR10-2015-0142330 20151012
- Main IPC: C07D319/12
- IPC: C07D319/12 ; B01D9/00 ; B01D39/00
Abstract:
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.
Public/Granted literature
- US20170101390A1 METHOD AND APPARATUS FOR PREPARATION OF LACTIDE USING LACTIDE PURIFICATION PROCESS Public/Granted day:2017-04-13
Information query
