[특허]Polymer recycling by selective dissolution

Polymer recycling by selective dissolution 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C08F-006/04 C08J-011/08
출원번호	US-0890533 (1992-05-28)
발명자 / 주소	Nauman E. Bruce (Schenectady NY) Lynch Jerry C. (Scotia NY)
출원인 / 주소	Rensselaer Polytechnic Institute (Troy NY 02)
인용정보	피인용 횟수 : 46 인용 특허 : 0

초록 ▼

A method for separating polymers from a physically commingled solid mixture containing a plurality of polymers comprises dissolving a first one of the polymers in a solvent at a first lower temperature to form a first preferably single phase solution and a remaining solid component. The solid component contains additional polymers which are not soluble to the solvent at the first temperature but which may be soluble at higher temperatures. The method includes subsequently heating the solvent to dissolve additional polymer from the solid component to form subsequent solutions. The polymers are then separated from their respective solution either using flash evaporation techniques when more than one polymer has been dissolved at a single temperature, or conventional techniques for extracting a polymer from a solvent in a solution.

대표청구항 ▼

A method for separating polymers from a physically commingled solid mixture containing at least three polymers, which includes at least two different polymers which are members of the PE family, by selective dissolution, comprising: dissolving at least one first polymer of the mixture in a selected solvent at a first temperature to form a first solution and a first remaining solid component which contains at least two polymers of the mixture which are insoluble in the selected solvent at the first temperature but soluble in the selected solvent at higher temperatures; separating the first solution from the first remaining solid component; separating the at least one first polymer from the selected solvent of the first solution; dissolving at least one second polymer from the first remaining solid component in the selected solvent at a second temperature to form a second solution and a second remaining solid component which contains at least one third polymer of the mixture which is insoluble in the selected solvent at the second temperature but soluble in the selected solvent at a third higher temperature; separating the second solution from the second remaining solid component; separating the at least one second polymer from the selected solvent of the second solution; dissolving at least one third polymer from the second remaining solid component in the selected solvent at the third higher temperature to form a third solution; and separating the at least one third polymer from the selected solvent of the third solution; each of the first, second and third solutions initially containing a solid concentration of polymer of from 5% to about 20% by weight and at least two of the first, second and third polymers being two different members of the PE family.

이 특허를 인용한 특허 (46)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
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연합인증

Polymer recycling by selective dissolution 원문보기

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Polymer recycling by selective dissolution 원문보기

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이 특허를 인용한 특허 (46)

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