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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0693399 (1985-01-22) |
발명자 / 주소 |
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인용정보 | 피인용 횟수 : 2 인용 특허 : 3 |
A novel treatment method for recovering halogenated vacuum pump oils such as chlorotrifluoroethylene, from contaminated filter papers. The process utilizes a trichlorotrifluoroethane (TCTFE) solvent and water mixture to extract the oil followed by vacuum distilling the resulting extractive.
A method for recovering halogenated oil from oil-saturated paper filters which comprises the steps of: a. providing an extraction vessel containing an extraction bath composed of a mixture of water and trichlorotrifluoroethane solvent; b. submerging halogenated oil-saturated paper filters into said
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