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Patent Agency Ranking
公开(公告)号：KR850001605B1
公开(公告)日：1985-10-24
申请号：KR830003062
申请日：1983-07-05
Applicant: TEXACO DEVELOPMENT CORP
Inventor： SHERMAN PHILIP B
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公开(公告)号：KR850001273B1
公开(公告)日：1985-09-04
申请号：KR830002028
申请日：1983-05-11
Applicant: TEXACO DEVELOPMENT CORP
Inventor： SHERMAN PHILIP B
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公开(公告)号：CA1205770A
公开(公告)日：1986-06-10
申请号：CA426904
申请日：1983-04-28
Applicant: TEXACO DEVELOPMENT CORP
Inventor： SHERMAN PHILIP B
Abstract: : A lubricating oil solvent refining process employing Nmethyl-2-pyrrolidone as solvent in which solvent is recovered from a solvent-oil mixture in a staged series of vaporization zones at progressively increasing pressure with external heat supplied only to the vaporization stage having the highest pressure followed by vacuum flash vaporization and inert gas stripping of further portions of the solvent from the extract wherein the partially denuded extract from the vacuum flash vaporization stage is heated in the presence of inert gas prior to introduction into the inert gas stripping zone.
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公开(公告)号：CA1187023A
公开(公告)日：1985-05-14
申请号：CA426905
申请日：1983-04-28
Applicant: TEXACO DEVELOPMENT CORP
Inventor： SHERMAN PHILIP B
Abstract: : A lubricating oil solvent refining process employing Nmethyl-2-pyrrolidone as solvent in which solvent is recovered from a solvent-oil mixture in a staged series of vaporization zones at progressively increasing pressure with external heat supplied only to the vaporization stage having the highest pressure and control of vaporization in the lower pressure stages is effected by passing a minor portion of the vapors from the highest pressure stage to the lowest pressure stage. A high temperature vacuum flash vaporization zone may follow the high pressure vaporization stage with external heat supplied to the vacuum flash vaporization zone.
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公开(公告)号：CA900396A
公开(公告)日：1972-05-16
申请号：CA900396D
Applicant: TEXACO DEVELOPMENT CORP
Inventor： DAVIES JAMES A , SHERMAN PHILIP B
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