IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0221672
(1980-12-30)
|
|
발명자
/ 주소 |
- Che Stanley C. (Los Alamitos CA)
|
| 출원인 / 주소 |
- Occidental Research Corporation (Irvine CA 02)
|
| 인용정보 |
피인용 횟수 :
18 인용 특허 :
13 |
초록
▼
A process for producing light aromatics, intermediate coal liquids, tar acids, and heavy hydrocarbons from pyrolytic vapors produced by the pyrolysis of coal is described herein. Such pyrolytic vapors are contacted with a quench liquid which comprises a hydrogen donor solvent to condense the pyrolyt
A process for producing light aromatics, intermediate coal liquids, tar acids, and heavy hydrocarbons from pyrolytic vapors produced by the pyrolysis of coal is described herein. Such pyrolytic vapors are contacted with a quench liquid which comprises a hydrogen donor solvent to condense the pyrolytic vapors and form a liquid mixture which comprises pyrolytic condensate. The liquid mixture is separated by vacuum flashing into a vapor containing tar acids and a liquid mixture containing the quench liquid and condensate remainder. This liquid mixture is then heated to transfer hydrogen from the hydrogen donor solvent to the condensate remainder. The hydrogenated liquid mixture is then separated into a heavy hydrocarbon stream and a solvent mixture which contains the spent and unused hydrogen donor solvent. The vapor produced by the vacuum flashing is then condensed and separated into a liquid stream containing tar acids, and a tar acid raffinate. A mixture of the solvent mixture and the tar acid raffinate is separated into a liquid stream containing light aromatics, a stream containing intermediate coal liquids, and a stream containing two- and three-ring aromatics and the spent and unused hydrogen donor solvent. The latter stream is then hydrogenated with gaseous hydrogen to produce two- and three-ring hydroaromatics and a hydrogenated spent hydrogen donor solvent, both of which are operative for recycle as a quench liquid and subsequently as a hydrogen donor solvent in the process.
대표청구항
▼
A process for producing light aromatics, intermediate coal liquids, tar acids, and heavy hydrocarbons from pyrolytic vapors produced by the pyrolysis of coal comprising: (a) condensing pyrolytic vapors, formed by the pyrolysis of coal, by contacting said pyrolytic vapors in a quench zone with a quen
A process for producing light aromatics, intermediate coal liquids, tar acids, and heavy hydrocarbons from pyrolytic vapors produced by the pyrolysis of coal comprising: (a) condensing pyrolytic vapors, formed by the pyrolysis of coal, by contacting said pyrolytic vapors in a quench zone with a quench liquid comprising a hydrogen donor solvent, under predetermined conditions of temperature, time and ratio of quench liquid to pyrolytic vapors operative to form a first liquid mixture comprising said hydrogen donor solvent and a pyrolytic condensate formed from said pyrolytic vapors by condensation thereof, said pyrolytic condensate comprising tar acids and a condensate remainder; (b) separating said first liquid mixture by vacuum flashing in a vacuum flashing zone into at least a first vapor comprising at least a major part of said tar acids, and a second liquid mixture comprising at least a major part of said quench liquid and said hydrogen donor solvent and also comprising at least a major part of said condensate remainder; (c) hydrogenating said condensate remainder in said second liquid mixture in a first hydrogenation zone with said hydrogen donor solvent in said second liquid mixture by heating and holding said second liquid mixture under predetermined conditions of elevated temperature and time operative to transfer hydrogen from said hydrogen donor solvent to said condensate remainder in said second liquid mixture thereby forming a third liquid mixture comprising a spent hydrogen donor solvent, unused hydrogen donor solvent and a hydrogenated condensate remainder; (d) separating said third liquid mixture from step (c) in a first separation zone into at least a heavy hydrocarbon raffinate comprising at least a major part of heavy hydrocarbons contained in said hydrogenated condensate remainder and a fourth liquid mixture comprising at least a major part of said spent hydrogen donor solvent, said unused hydrogen donor solvent, and a residue of said hydrogenated condensate remainder; (e) condensing and separating said first vapor, from said vacuum flashing zone of step (b), in a second separation zone, into a fifth liquid mixture comprising at least a major part of said tar acids, and a sixth liquid mixture which comprises a tar acid raffinate; (f) introducing said fourth liquid mixture from said first separation zone of step (d), and said sixth liquid mixture from said second separation zone of step (e), into a third separation zone and separating said fourth and sixth liquid mixtures into, and forming, at least a seventh liquid mixture comprising at least a major part of light aromatics contained in said residue of said hydrogenated condensate remainder and said tar acid raffinate, an eighth liquid mixture comprising at least a major part of intermediate coal liquids contained in said residue of said hydrogenated condensate remainder and said tar acid raffinate, and a ninth liquid mixture comprising at least a major part of two- and three-ring aromatics contained in said residue of said hydrogenated condensate remainder and said tar acid raffinate, and at least the major part of said spent hydrogen donor solvent and unused hydrogen donor solvent contained in said fourth liquid mixture; (g) hydrotreating said ninth liquid mixture from said third separation zone of step (f), in a second hydrogenation zone with a gas comprising gaseous hydrogen under conditions operative to produce a tenth liquid mixture comprising two- and three-ring hydroaromatics and a hydrogenated spent hydrogen donor solvent, both of which are operative for use in said quench zone as quench liquid and subsequently in said first hydrogenation zone as hydrogen donor solvent, and unused hydrogen donor solvent; and (h) utilizing said tenth liquid mixture from said second hydrogenation zone of step (g) as at least a major part of said quench liquid, which comprises a hydrogen donor solvent, used in said quench zone of step (a).
※ AI-Helper는 부적절한 답변을 할 수 있습니다.