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Continuous process for manufacture of lactide polymers with controlled optical purity 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • C08G-063/08
  • C07D-319/12
출원번호 US-0825059 (1992-01-24)
발명자 / 주소
  • Gruber Patrick R. (St. Paul MN) Hall Eric S. (Crystal MN) Kolstad Jeffrey J. (Wayazata MN) Iwen Matthew L. (Minneapolis MN) Benson Richard D. (Maple Plain MN) Borchardt Ronald L. (Eden Prairie MN)
출원인 / 주소
  • Cargill, Incorporated (Minnetonka MN 02)
인용정보 피인용 횟수 : 198  인용 특허 : 0

초록

A process for the continuous production of polylactide polymers from lactic acid which incorporates removal of water or a solvent carrier to concentrate the lactic acid feed followed by polymerization to a low-molecular-weight prepolymer. This prepolymer is fed to a reactor in which a catalyst is ad

대표청구항

A process for the continuous conversion of a crude lactic acid feed in an aqueous medium to polylactide, said process comprising the steps of: a) providing a source of lactic acid in an aqueous medium; b) concentrating the lactic acid in the aqueous medium by evaporating a substantial portion of the

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