摘要:
Waxy distillate lubricating oil stocks suitable for the preparation, by conventional unit processes, of high V.I., low pour point lubricating oils, are advantageously catalytically dewaxed with macrocrystalline ZSM-5 (crystallites larger than 2 microns) preferably associated with a hydrogenation metal such as platinum or palladium.
摘要:
A process for the manufacture of high quality lubricating oils having a high viscosity index and low pour point is disclosed which comprises catalytically dewaxing a lubricating oil stock by contacting the same in the presence of hydrogen over a zeolite such as ZSM-5 which has been silica-modified.
摘要:
A process for producing lubricant oils of low pour point and high viscosity index by first carrying out a partial dewaxing of a lubricant base stock in an initial catalytic dewaxing operation, followed by a selective dewaxing step. The initial catalytic dewaxing step is carried out using a large pore, high silica zeolite dewaxing catalyst such as high silica Y or zeolite beta which dewaxes by isomerizing the waxy components of the base stock to less waxy brance chain isoparaffins but the severity of the operation is controlled so as to effect only a partial removal of the waxy components. Further removal of the waxy components is effected during the subsequent dewaxing step which is selective for the removal of the more waxy n-paraffin components, leaving the branched chain isoparaffins which contribute to a high VI in the product. The selective dewaxing step may be either a solvent, e.g. MEK dewaxing operation or a catalytic dewaxing using a highly shape selective zeolite such as ZSM-22 or ZSM-23. The severity of the initial catalytic dewaxing operation may be controlled so as to effect a net increase in the content of isoparaffins and because of the selective nature of the solvent dewaxing step, this increased isoparaffins concentration may be retained, producing a product of high VI. The pour point of the feedstock is preferably reduced during the initial catalytic dewaxing step to a value which is no lower than 10.degree. F. and preferably no lower than 20.degree. F., above the target pour point for the products. Generally, this will entail a reduction of at least 10.degree. F. and preferably at least 20.degree. F. in the pour point of the feed.
摘要:
The present invention includes a process and catalyst composition for paraffinic isomerization of a hydrocarbon feedstock which has a paraffin content having no more than 20 carbon atoms per molecule. The feedstock is contacted with a crystalline aluminosilicate zeolite catalyst having pore openings defined by: (1) a ratio of sorption of n-hexane to o-xylene, on a volume percent basis, of greater than about 3, which sorption is determined at a P/P.sub.o of 0.1 and at a temperature of 50.degree. C. for n-hexane and 80.degree. C. for o-xylene and (2) by the ability of selectively cracking 3-methylpentane (3MP) in preference to the doubly branched 2,3-dimethylbutane (DMB) at 1000.degree. F. and 1 atmosphere pressure from a 1/1/1 weight ratio mixture of n-hexane/3-methyl-pentane/2,3-dimethylbutane, with the ratio of rate constants k.sub.3MP/ k.sub.DMB determined at a temperature of 1000.degree. F. being in excess of about 2, e.g., ZSM-22, ZSM-23, AXM-35 and mixtures thereof, in combination with a Group VIII metal, and having a zeolite SiO.sub.2 /Al.sub.2 O.sub.3 ratio of at least about 20:1 at a temperature and pressure suitable for isomerization.
摘要翻译:本发明包括用于烃原料的链烷烃异构化的方法和催化剂组合物,其具有每分子具有不超过20个碳原子的链烷烃含量。 原料与具有孔开口的结晶铝硅酸盐沸石催化剂接触,所述沸石催化剂的定义如下:(1)正丁烷与邻二甲苯的吸附比例,以体积百分数计,大于约3,该吸附在 P / Po为0.1,温度为50℃,正己烷和80℃为邻二甲苯,(2)选择性裂解3-甲基戊烷(3MP)优于双支链2 ,三甲基丁烷(DMB)在1000°F和1大气压下,由正己烷/ 3-甲基戊烷/ 2,3-二甲基丁烷的1/1/1重量比混合物与速率常数比例k3MP / kDMB在1000°F的温度下测定为超过约2,例如ZSM-22,ZSM-23,AXM-35及其混合物,与VIII族金属组合,并具有SiO 2 / Al 2 O 3沸石 在适于异构化的温度和压力下至少约20:1的比例。
摘要:
A novel process is disclosed for the production of high boiling jet fuels which comprises contacting a chargestock with an end boiling point of about 750.degree. F. with ZSM-22 under carefully controlled conditions of temperature and pressure and blending the 330.degree. F. plus fraction with a conventional jet fuel in order to obtain a product having acceptable jet fuel properties and having a high boiling range.
摘要:
Hydrocarbon oils, especially waxy distillate lubricating oil stocks suitable for the preparation, by conventional unit processes, of high V.I., low pour point lubricating oils, are advantageously catalytically dewaxed with synthetic offretite catalyst preferably associated with a hydrogenation metal such as platinum or palladium.
摘要:
An FCC or fluidized catalytic cracking process and apparatus for converting heavy metals laden crudes is disclosed. The heavy feed, conventional catalyst and an additive or vanadium getter contact the feed in a riser reactor. The additive is segregated from conventional FCC catalyst upstream of the conventional FCC regenerator. An elutriating, upflow riser reactor may be used with a coarse, rapidly settling getter. A fine, slowly settling getter may be used, with getter segregation achieved by using an elutriating cyclone on the riser outlet, an elutriating catalyst stripper, a sieve, or the like. The spent getter may be used once through, regenerated in a separate getter regenerator, or used as a source of fuel. Alumina and sponge coke are preferred getters.
摘要:
A paraffin conversion process for hydroisomerizing a nitrogen and wax-containing hydrocarbon feedstock comprising contacting the feedstock with a catalyst including a ZSM-11 zeolite characterized by an alpha value from about 10 to 50, in combination with a Group VIII metal hydrogenation-dehydrogenation component of platinum or palladium at a temperature of about 400.degree. F. to about 850.degree. F. and at a pressure of from about 200 to about 2000 psig.
摘要:
A process is described for preparing a binder-free Zeolite Beta containing catalyst which has a highly dispersed noble metal incorporated into the framework. The process comprises steaming Zeolite Beta, followed by noble metal incorporation and calcination. The present invention is also directed to an improved calcination process.