摘要:
The invention relates to the use of particulate silicone resins in the absence of added organic solvents with particulate inorganic materials to form structured bodies and in particular molecular sieve containing structured bodies. The silicone resin is used in the form of a particulate with an average particle size of less than 700 um. Upon calcining, the silicone resin is converted to silica which acts as a binder.
摘要:
A method is disclosed for modifying a catalytic molecular sieve for shape-selective hydrocarbon conversions comprises: a) selectivating said catalytic molecular sieve by contacting with a silicon-containing selectivating agent; and b) calcining the selectivated catalytic molecular sieve at high temperature calcination conditions comprising temperatures greater than 700° C., which conditions are sufficient to reduce acid activity as measured by alpha value and increase diffusion barrier of said catalytic molecular sieve as measured by the rate of 2,3-dimethylbutane uptake, as compared to the selectivated catalyst. Catalytic molecular sieves thus prepared, such as silica-bound ZSM-5, and their use in hydrocarbon conversion processes such as aromatics isomerization, e.g., xylene isomerization, ethylbenzene conversion and aromatics disproportionation, e.g., toluene disproportionation are also disclosed.
摘要:
A process and catalyst for catalytic cracking comprising a non-layered, ultra-large pore crystalline material. The crystalline material preferably has a benzene adsorption capacity greater than about 15 grams benzene/100 grams at 50 torr and 25.degree. C. Preferred materials have a hexagonal electron diffraction pattern that can be indexed with a d.sub.100 value greater than about 18 Angstrom Units and a hexagonal arrangement of uniformly sized pores with a maximum perpendicular cross section of at least about 13 Angstrom units. Preferred cracking catalysts comprise ultra-large pore materials having pore openings formed by at least 20 tetrahedrally coordinated members, most preferably with 36 or 42 tetahedrally coordinated members.
摘要:
Lower olefins are upgraded to high viscosity index lubricants by converting olefinic feed over a medium pore zeolite catalyst consisting essentially of aluminosilicate HzSM-22 under oligomerization conditions.
摘要:
An improved method for passivating metals in a hydrocarbon feedstock during catalytic cracking has been discovered. The method involves contacting the feedstock with a passivating agent comprising a precipitated porous rare earth oxide, alumina, and aluminum phosphate precipitate. The passivating agent may be coated on a cracking catalyst, be part of the matrix of a cracking catalyst, or be added to the cracking operation as discrete particles.
摘要:
This invention relates to a new catalyst composition. The catalyst composition comprises a catalytic component and a support comprising an amorphous combination of lanthana, alumina and aluminum phosphate, and may be characterized after calcination by a pore size distribution including about 5 to 20 vol. % within the pore size diameter range of 50 to 100 Angstroms, about 10 to 35 vol. % within the pore size diameter range of 100 to 150 Angstroms, about 15 to 50 vol. % within the pore size diameter range of 150 to 200 Angstroms and about 10 to 50 vol. % within the pore size diameter range of 200 to 400 Angstroms.
摘要:
The present invention relates to resid hydrotreating with hydrogen bronze catalyst which unexpectedly achieve superior demetallization compared to large pore CoMo/Al.sub.2 O.sub.3 catalyst.
摘要翻译:本发明涉及与氢青铜催化剂的渣油加氢处理,其与大孔CoMo / Al 2 O 3催化剂相比意外地实现了优异的脱金属化。
摘要:
This invention relates to a new and useful amorphous, solid, combination refractory composition and to its synthesis. The new composition is an x-ray amorphous rare earth aluminum phosphorus oxide having high surface area and unique pore size distribution. The composition is useful as a catalyst support and provides improvement over prior art supports such as alumina or aluminum phosphate for certain catalytic applications.
摘要:
A catalytic dewaxing process is improved by the use of a mixed zeolite catalyst which combines the following components: a first zeolitic catalyst having a Constraint Index not less than 1, a second, different, catalytic component of specified characteristics, and a hydrogenation component. This process for preparing the catalyst is also disclosed. Examples of specific combinations of dewaxing catalysts include ZSM-5 and Dealuminized Y, ZSM-5 and ZSM-12, and ZSM-5 and TEA Mordenite.
摘要:
The elution of zinc from zinc-impregnated zeolite catalysts is minimized by incorporating gallium into the catalyst composition. Optionally, palladium may also be included in the composition. The catalyst composition is used to effect the conversion of propane in hydrocarbon streams to aromatic hydrocarbons.