摘要:
Low sulfur gasoline of relatively high octane number is produced from a cracked, sulfur-containing olefinic naphthas by hydrodesulfurization followed by treatment over an acidic catalyst comprising zeolite beta with a metal hydrogenation component, preferably a mild hydrogenation component such as molybdenum. The treatment over the acidic catalyst in the second step restores the octane loss which takes place as a result of the hydrogenative treatment and results in a low sulfur gasoline product with an octane number comparable to that of the feed naphtha. In favorable cases, using feeds of extended end point such as heavy naphthas with 95 percent points above about 380.degree. F. (about 193.degree. C.), improvements in both product octane and yield relative to the feed may be obtained.
摘要:
Low sulfur gasoline of relatively high octane number is produced from a catalytically cracked, sulfur-containing naphtha and benzene-rich fraction by hydrodesulfurization in a first reaction zone and treatment over an acidic catalyst, preferably an intermediate pore size zeolite such as ZSM-5 in a second reaction zone to reduce the octane loss which takes place as a result of the hydrodesulfurization. The benzene-rich fraction can be cofed to the first reaction zone or the second reaction zone. The benzene-rich fraction is preferably a heart-cut reformate.
摘要:
A process for producing a desulfurized gasoline boiling range product of relatively high octane number from a sulfur containing feed boiling in the naphtha boiling range by converting the feed in a single stage over a catalyst which comprises a) a substantially acidic porous refractory solid having an intermediate effective pore size and the topology of a zeolitic behaving material, which, in the aluminosilicate form, has a Constraint Index of about 1 to 12, e.g., MCM-22, b) a Group VI metal, e.g., Mo, c) a Group VIII metal, e.g., Co, and d) a suitable refractory support, e.g., Al.sub.2 O.sub.3, under hydrotreating conditions to produce a product comprising a normally liquid fraction boiling in substantially the same boiling range as the feed, but which has a lower sulfur content than the feed and which has an octane number substantially no less than the feed.
摘要翻译:一种通过在单一阶段中将进料转化成催化剂来生产在沸石沸点范围内沸腾的含硫原料的具有相对高辛烷值的脱硫汽油沸点产物的方法,所述催化剂包括:a)具有中间体的基本上酸性的多孔耐火固体 有效孔径和沸石行为材料的拓扑结构,其以铝硅酸盐形式具有约1至12的约束指数,例如MCM-22,b)第VI族金属,例如Mo,c)组 VIII金属,例如Co,和d)在加氢处理条件下合适的耐火载体,例如Al 2 O 3,以产生包含与进料基本上相同沸点范围沸腾的通常液体馏分的产物,但硫含量低于 该进料具有基本上不小于进料的辛烷值。
摘要:
Low sulfur gasoline of relatively high octane number is produced from a catalytically cracked, sulfur-containing naphtha by hydrodesulfurization followed by treatment over an acidic catalyst, preferably an intermediate pore size zeolite such as ZSM-5. The treatment over the acidic catalyst in the second step, which is carried out in a hydrogen atmosphere which is essentially free of hydrogen sulfide and ammonia, restores the octane loss which takes place as a result of the hydrogenative treatment and results in a low sulfur gasoline product with an octane number comparable to that of the feed naphtha. The hydrogen supplied to the second step may be make-up hydrogen with recycle hydrogen routed to the hydrodesulfurization step after removal of ammonia and hydrogen sulfide in a scrubber.
摘要:
There is provided a catalyst comprising at least one hydrogenation metal, such as Ni and Mo, supported on a delaminated layered silicate, such as kenyaite, which has been swollen and calcined. There is also provided a method for making this catalyst. There is further provided a process for using this catalyst to demetalize a petroleum feedstock, such as a gas oil.
摘要:
Chemical methods for diminishing the viscosity of petroleum residuals are disclosed. According to a preferred embodiment, residuals and olefins are coreacted employing a peroxide and a silver salt at a temperature between the pour point of the residual and about 350.degree. C.
摘要:
A process for the purification of liquefied coal is disclosed, employing a polarity gradient for fractionation. Maltenic and asphaltenic fractions are isolated. Integration of the fractionation process with additional processes such as distillation, partial oxidation, and catalytic hydrotreating is also disclosed.
摘要:
Methylation of coal-derived liquids and other polynuclear aromatic distillate feed stocks for improving distillate fuel quality is achieved by contacting the feed stock with hydrogen sulfide and carbon monoxide over conventional sulfur-resistant hydrotreating catalysts. The resultant product comprises methylated aromatic and hydroaromatic molecules of increased diesel quality. Further hydrogenating of the methylated hydrocarbons further increases the cetane number of the methylated product. A major product of the methylation reaction is elemental sulfur.
摘要:
This invention relates to a process involving hydrocracking and dewaxing of a feedstream in which a converted fraction can correspond to a majority of the product from the reaction system, while an unconverted fraction can exhibit improved properties. In this hydrocracking process, it can be advantageous for the yield of unconverted fraction for gasoline fuel application to be controlled to maintain desirable cold flow properties for the unconverted fraction. Catalysts and conditions can be chosen to assist in attaining, or to optimize, desirable product yields and/or properties.
摘要:
This invention relates to a process involving hydrocracking and dewaxing of a feedstream in which a converted fraction can correspond to a majority of the product from the reaction system, while an unconverted fraction can exhibit improved properties. In this hydrocracking process, it can be advantageous for the yield of unconverted fraction for gasoline fuel application to be controlled to maintain desirable cold flow properties for the unconverted fraction. Catalysts and conditions can be chosen to assist in attaining, or to optimize, desirable product yields and/or properties.