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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
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.
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2.发明授权
公开(公告)号：US3923637A
公开(公告)日：1975-12-02
申请号：US34617573
申请日：1973-03-29
Applicant: GULF RESEARCH DEVELOPMENT CO
Inventor： CHRISTMAN ROBERT D , MCKINNEY JOEL D , READAL THOMAS C , YANIK STEPHEN J
CPC classification number: C10G45/02
Abstract: A process is described for fixed bed hydrodesulfurizing a nonasphaltic oil feed or feed blend for a zeolitic FCC riser cracking system in which cracking occurs at a space velocity sufficiently high to prevent formation of a catalyst bed. It is found that sulfur dioxide emissions from the zeolite catalyst regenerator associated with the riser are reduced to a lower extent than total sulfur removal from the feed oil. This indicates uneven sulfur removal in the hydrodesulfurization step whereby a smaller portion of the sulfur is removed from the heavy portion of the feed from which the coke is derived than from the lighter portion of the feed. The present invention shows an advantage in keeping hydrocracking at a specified low level during the hydrodesulfurization step. This is accomplished in part by introduction of the high boiling portion of the feed to the upstream end of the hydrodesulfurization reactor and the low boiling portion of the feed downstream in the hydrodesulfurization reactor. In this manner maximum sulfur removal from the high boiling portion of the feed is approached, while hydrocracking is maintained at the specified low level. The further discovery is demonstrated herein that the ratio of gasoline to total conversion during the subsequent riser cracking step is enhanced by maintaining hydrocracking at said specified low level.
Abstract translation: 描述了用于沸石FCC提升管裂解系统的非沥青油进料或进料共混物的固定床加氢脱硫的方法，其中裂纹以足够高的空间速度发生以防止形成催化剂床。 发现与提升管相关联的沸石催化剂再生器的二氧化硫排放量比从进料油中除去总硫的程度更低。 这表示在加氢脱硫步骤中不均匀的硫去除，其中较少部分的硫从可得到焦炭的进料的重部分除去，而不是从进料的较轻部分除去。 本发明显示出在加氢脱硫步骤期间将加氢裂化保持在特定低水平的优点。 部分通过在加氢脱硫反应器中将进料的高沸点部分引入加氢脱硫反应器的上游端和下游的进料的低沸点部分来实现。 以这种方式，最大程度地接近来自进料的高沸点部分的硫，同时加氢裂化保持在指定的低水平。 在本文中证明了进一步的发现，在随后的提升管裂解步骤期间汽油与总转化率的比例通过将加氢裂化维持在所述指定的低水平来增强。
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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
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.
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