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특허 상세정보

Cyclic carbonic acid esters as solvents for poly-(.beta.-hydroxybutyric aci d

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) C08G-063/06   
미국특허분류(USC) 528/491 ; 435/822 ; 435/831 ; 435/837 ; 528/361
출원번호 US-0758647 (1977-01-12)
우선권정보 CH-0000403 (1976-01-14)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Merriam, Marshall & Bicknell
인용정보 피인용 횟수 : 29  인용 특허 : 0
초록

The use of cyclic carbonic acid esters of the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, are hydrogen or alkyl with 1 to 6 C-atoms, as a solvent for racemic or optically active poly-(.beta.-hydroxybutyric acid).The preferred embodiment uses hot (120.degree. to 150.degree. C) ethylene carbonate or 1,2-propylene carbonate to extract poly-(.beta.-hydroxybutyric acid) from moist or dry fermentation masses. These solvents have the advantage that the extracted poly-(.beta.-hydroxybutyric acid) is precip...

대표청구항이 없습니다

이 특허를 인용한 특허 피인용횟수: 29

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