摘要:
Molecular sieve agglomerates exhibiting reduced pore mouth blockage and decreased diffusivity resistance to the internal sieve pores result from coating, prior to addition of a binding agent to the sieve, the molecular sieve particles with an organic polymer, fixing the polymer to the sieve surface so that it exhibits no migratory tendencies and subsequently removing the coating by combustion during calcination of the formed agglomerate. Such agglomerates showed enhanced activity and selectivity in typical refining processes such as dewaxing and fluid catalytic cracking. The molecular sieve agglomerates also may be employed in other hydrocarbon conversion processes such as hydrocracking, dehydrocyclization, isomerization, hydrofining, reforming, and dealkylation.
摘要:
Hydrocracking processes are disclosed using novel catalysts comprising medium and large pore non-zeolitic molecular sieves selected from novel compositions such as the silicoaluminophosphates of U.S. Pat. No. 4,440,871, preferably in combination with traditional hydrocracking catalysts such as zeolitic aluminosilicates. The products of the instant processes are characterized by higher isoparaffin to n-paraffin ratios.
摘要:
Dewaxing processes for hydrocarbon feedstocks are disclosed using novel catalysts comprising specific silicoaluminophosphates of U.S. Pat. No. 4,440,871. The products of the instant dewaxing processes are characterized by lower pour points than the hydrocarbon feedstock.
摘要:
A process for hydrocracking a crude oil feed, a hydrocracking catalyst employed therein, and a process for the preparation of this catalyst are disclosed. The hydrocracking catalyst comprises a zeolitic aluminosilicate which has an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least 6 and which has been treated by (i) thermal treatment at an effective temperature and for an effective time in the presence of steam, followed by (ii) ion-exchange with a solution containing ammonium ion; and (2) an effective amount of a hydrogenation component. In a preferred embodiment, the starting crystalline zeolitic aluminosilicate is a Y-type zeolite having an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least about 9 and a unit cell dimension (a.sub.o) of less than about 24.55 .ANG., and the steam treatment is carried out for a period sufficient to cause a decrease of not more than about 0.1 .ANG. in the unit cell dimension, thereby producing a Y-type zeolite product having a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least about 9 and a unit cell dimension of less than about 24.45 .ANG..
摘要翻译:公开了一种用于加氢裂化原油进料的方法,其中使用的加氢裂化催化剂和制备该催化剂的方法。 加氢裂化催化剂包括SiO 2 / Al 2 O 3摩尔比至少为6的沸石硅铝酸盐,其已经通过(i)在有效温度下热处理并在蒸汽存在下持续有效时间进行处理,随后是(ii) 与含有铵离子的溶液进行离子交换; 和(2)有效量的氢化组分。 在优选的实施方案中,起始结晶沸石硅铝酸盐是具有至少约9的SiO 2 / Al 2 O 3摩尔比和小于约24.55埃的晶胞尺寸(ao)的Y型沸石,并且进行蒸汽处理 使其在单元电极尺寸内足够降低不大于约0.1Ag的范围内,由此生产SiO 2 / Al 2 O 3摩尔比为至少约9的Y型沸石产物,并且晶胞尺寸小于约 24.45 ANGSTROM。
摘要:
Hydrocracking processes are disclosed using novel catalysts comprising non-zeolitic molecular sieves such as the silicoaluminophosphates of U.S. Pat. No. 4,440,871. The products of the instant processes are characterized by higher i-paraffin to n-paraffin ratios.
摘要:
Dewaxing processes for hydrocarbon feedstocks are disclosed using novel catalysts comprising titanoaluminosilicates. The products of the instant dewaxing processes are characterized by lower pour points than the hydrocarbon feedstock.
摘要:
Molecular sieve agglomerates exhibiting reduced pore mouth blockage and decreased diffusivity resistance to the internal sieve pores result from coating, prior to addition of a binding agent to the sieve, the molecular sieve particles with an organic polymer, fixing the polymer to the sieve surface so that it exhibits no migratory tendencies and subsequently removing the coating by combustion during calcination of the formed agglomerate. Such agglomerates showed enhanced activity and selectivity in typical refining processes such as dewaxing and fluid catalytic cracking.
摘要:
This invention pertains to a hydrocracking process for mid-distillate products and to hydrocracking catalysts having improved selectivity, activity and stability for use in the production of mid-distillate products from heavy gas oil feedstocks boiling above 700.degree. F.
摘要:
Dewaxing processes for hydrocarbon feedstocks are disclosed using novel catalysts comprising non-zeolitic molecular sieves, such as the silicoaluminophosphates of U.S. Pat. No. 4,440,871. The products of the instant dewaxing processes are characterized by lower pour points than the hydrocarbon feedstock.
摘要:
Hydrocracking processes are disclosed using catalysts comprising silicoaluminophosphates of U.S. Pat. No. 4,440,871 characterized in the calcined form by an adsorption of oxygen of at least 4 percent by weight at a partial pressure of 100 torr and a temperature of -186.degree. C.