公开(公告)号：US3876532A

公开(公告)日：1975-04-08

申请号：US33638273

申请日：1973-02-27

Applicant: GULF RESEARCH DEVELOPMENT CO

Inventor： PLUNDO ROBERT A ,  READAL THOMAS C ,  STROM JAMES R

IPC: C10G45/02 ,  C10G23/02

CPC classification number: C10G45/02 ,  C10G2400/06

Abstract: Middle distillate virgin oils, such as straight run furnace oil, jet fuel or kerosene are required to meet many commercial specifications, among which are maximum allowable total sulfur content, maximum allowable mercaptan sulfur content and maximum allowable total acid number. Middle distillates which do not meet commercial specifications in regard to total sulfur content can be hydrodesulfurized for the removal of the portion of the total sulfur required for meeting the commercial requirement. Such hydrodesulfurization requires more severe conditions than do processes for reduction of total acid number or for reduction of mercaptan sulfur content so that under the severe conditions required for hydrodesulfurization, excessive total acid number and excessive mercaptan content are automatically concomitantly reduced to commerically acceptable levels. The present invention relates to the hydrotreatment of virgin middle distillates which meet commercial specifications in regard to total sulfur content in the absence of prior hydrotreating or any other treatment, but do not meet commercial specifications in regard to total acid number or in regard to mercaptan sulfur content. According to the present invention, the latter middle distillates are not blended with high total sulfur feeds flowing to hydrodesulfurization processes requiring severe conditions to accomplish reduction in total sulfur content, but are hydrotreated separately under relatively more mild catalytic hydrotreating conditions to reduce mercaptan sulfur content or total acid number at hydrotreating severities which are so mild that there is an extremely limited consumption of hydrogen and a very limited removal of total sulfur. The catalyst employed in the mild hydrotreating processes of this invention is a deactivated hydrotreating catalyst from a more severe hydrodesulfurization or other hydrotreating operation which is no longer of viable use in the more severe operation due to numerous cycles of use and regeneration, due to excessive metals deposit thereon, or any other reason.

公开(公告)号：US3870626A

公开(公告)日：1975-03-11

申请号：US33638373

申请日：1973-02-27

Applicant: GULF RESEARCH DEVELOPMENT CO

Inventor： PLUNDO ROBERT A ,  READAL THOMAS C ,  STROM JAMES R

IPC: C10G45/02 ,  C10G45/04 ,  C10G23/02

CPC classification number: C10G45/04 ,  C10G45/02

Abstract: Middle distillate virgin oils, such as straight run furnace oil, jet fuel or kerosene are required to meet many commercial specifications, among which are maximum allowable total sulfur content, maximum allowable mercaptan sulfur content and maximum allowable total acid number. Middle distillates which do not meet commercial specifications in regard to total sulfur content can be hydrodesulfurized for the removal of the portion of the total sulfur required for meeting the commercial requirement. Such hydrodesulfurization requires more severe conditions than do processes for reduction of total acid number or for reduction of mercaptan sulfur content so that under the severe conditions required for hydrodesulfurization, excessive total acid number and excessive mercaptan content are automatically concomitantly reduced to commercially acceptable levels. The present invention relates to the hydrotreatment of virgin middle distillates which meet commercial specifications in regard to total sulfur content in the absence of prior hydrotreating or any other treatment, but do not meet commercial specifications in regard to total acid number or in regard to mercaptan sulfur content. According to the present invention, the latter middle distillates are not blended with high total sulfur feeds flowing to hydrodesulfurization processes requiring severe conditions to accomplish reduction in total sulfur content, but are hydrotreated separately under relatively more mild catalytic hydrotreating conditions to reduce mercaptan sulfur content or total acid number at hydrotreating severities which are so mild that there is an extremely limited consumption of hydrogen and a very limited removal of total sulfur. The catalyst employed in the mild hydrotreating processes of this invention is a deactivated hydrotreating catalyst from a more severe hydrodesulfurization or other hydrotreating operation which is no longer of viable use in the more severe operation due to numerous cycles of use and regeneration, due to excessive metals deposit thereon, or any other reason.

公开(公告)号：US3349025A

公开(公告)日：1967-10-24

申请号：US47230065

申请日：1965-07-15

Applicant: GULF RESEARCH DEVELOPMENT CO

Inventor： HENKE ALFRED M ,  SCHMID BRUCE K ,  STROM JAMES R

IPC: B01J37/20

CPC classification number: B01J37/20 ,  C10G47/04 ,  C10G47/06 ,  C10G47/12

公开(公告)号：US3294674A

公开(公告)日：1966-12-27

申请号：US42170564

申请日：1964-12-28

Applicant: GULF RESEARCH DEVELOPMENT CO

Inventor： HAROLD BEUTHER ,  SCHMID BRUCE K ,  STROM JAMES R

IPC: B01J23/30 ,  B01J37/20

CPC classification number: B01J23/30 ,  B01J37/20 ,  C10G47/00 ,  C10G47/12