摘要:
A process is provided for conducting organic compound conversion over a catalyst comprising alumina and/or gallia which has been treated by a method which comprises contact with ammonium or boron fluoride reagent, contact with a particular aqueous ammonium exchange solution, and thereafter calcination.
摘要:
In the process for activating high-silica zeolite catalyst with alumina activating agent wherein a crystalline zeolite catalyst having a silica:alumina ratio greater than 70 and a constraint index of 1 to 12 is contacted with the activating agent at elevated temperature, the improvement which comprises: hydrothermally treating an intimate mixture of zeolite catalyst and an effective amount of activating agent in contact with an aqueous liquid phase under reaction conditions to increase the cracking activity of the catalyst.The activated catalyst product may be produced by hydrothermal treatment of a composite mixture of zeolite and hydrated alumina binder material. The preferred zeolites are acid ZSM-5 type crystalline materials having a silica:alumina ratio of at least 2000:1.
摘要:
A method for enhancing the activity of a crystalline zeolite, including a zeolite having a silica-to-alumina ratio greater than 100, is disclosed which involves compositing and extruding the zeolite with an alumina support matrix, vacuum impregnating the extrudate with an aqueous solution of an alkali metal fluoride, contacting the impregnated extrudate with a warm aqueous solution of an ammonium salt and then calcining the final product.
摘要:
The hydrophobicity of crystalline zeolites is enhanced and their catalytic activity altered by treatment with fluorine under controlled conditions which result in dealumination and structural stabilization as evidenced by changes observed in their infrared framework spectra.
摘要:
A process for the production of compounds of the formula
1. CONTACTING IN THE LIQUID PHASE HF with a compound of the formula
D R A W I N G 2. FEEDING THE AROMATIC PRODUCT OF STEP (1) TO A SECOND REACTOR, AND 3. CONTACTING IN THE VAPOR PHASE HF with the product of step (2) WHEREIN STEPS (1) AND (3) ARE PERFORMED IN THE PRESENCE OF A CO-PRECIPITATED METAL-ALUMINUM-FLUORIDE COMPLEX WHEREIN THE METAL IS SELECTED FROM THE GROUP CONSISTING OF Group IB, IIB, VIB and VIII of the Periodic Table of Elements and n is from 0 to 5, inclusive.
摘要:
A method for preparing a hydrocarbon conversion catalyst by providing a composite composed of alumina having associated therewith a Group VIB or VIII metal or compound and contacting the composite with an activator system comprising oxygen and an organic fluoride compound having from 2 to 16 carbon atoms. The catalyst so prepared is useful in hydrocarbon conversion processes as isomerization, hydrocracking, reforming, dehydrogenation, disproportionation and polymerization.
摘要:
The present invention relates to a process for producing Epsilon -caprolactam which comprises bringing N-acetyl- Epsilon caprolactam into contact in a gaseous phase with an acid catalyst or basic catalyst in the presence of water vapor.
摘要:
A method of preparing supported nickel-tungsten and nickeltungsten-fluorine catalysts of superior hydrogenating activity, by separately impregnating and calcining a porous support material with a water-soluble tungsten salt and a solution of a nickel salt in which the support is washed following impregnation with the nickel salt prior to calcination to fix the nickel.