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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0157728 (1980-06-09) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 38 인용 특허 : 3 |
An asphalt containing petroleum oil is deasphalted and extracted by contacting the oil with a solvent maintained at its critical temperature and pressure. With the solvent at its critical temperature and pressure, extraction of the valuable hydrocarbon oils present in the asphaltic feedstock is effe
A process for extracting a hydrocarbon oil from an asphaltic feedstock, said process comprising the steps of contacting said feedstock with a low molecular weight organic solvent selected from the group consisting of ethylene glycols and thiophenes at a temperature and pressure equal to, or slightly
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