摘要:
Nitrogenous compounds especially bases such as amines are used to control the operation of a hydrocracker. Catalyst activity and selectivity may be controlled by addition of the base to the feed, for example, to control the balance between isomerization and conversion in an operation using a zeolite beta catalyst. Runaway conditions may be controlled by the addition of nitrogenous compounds and if they are added at intermediate points along the length of the reactor, the temperature profile within the reactor can be effectively regulated.
摘要:
Nitrogenous compounds especially bases such as ammonia vapor are used to control the operation of a hydrocracker or catalytic dewaxer. Catalyst activity and selectivity may be controlled by addition of the base to the feed, for example, to control the balance between isomerization and hydrocracking in an operation using a zeolite beta catalyst. Runaway conditions may be controlled by the addition of nitrogenous compounds to regulate the temperature profile within the reactor.
摘要:
This invention provides a novel hydrocracking catalyst composition that contains Zeolite Beta having a framework boron content, a solid source of alumina, and a hydrogenation component. It further provides a low-pressure hydrocracking process that uses such composition.
摘要:
In pre-engine converters, a low octane fuel is contacted with a catalyst bed at high temperature cracking conditions to produce a gaseous product of substantially higher octane which is then fed, together with air, directly to an internal combustion engine. This improvement mixes oxygen with the fed fuel and uses a ZSM-5 zeolite alone or mixed with an oxidation catalyst for the conversion.
摘要:
Microbial conversion of agricultural carbohydrate materials to alcohols followed by direct conversion of the oxygenated microbial reaction product to a hydrocarbon product comprising a substantial highly aromatic fraction which is liquid at normal temperatures and pressures. This latter conversion is carried out in the effective presence of a high silica to alumina ratio zeolite like ZSM-5.
摘要:
A method is provided of operating an internal combustion engine comprising subjecting a hydrocarbon fuel of relatively low octane number to conversion at elevated temperatures by passing it through a reaction zone containing a fuel system of unidirectional, e.g., substantially parallel, channels with rigid walls, e.g., a monolith or series of monoliths, at least the internal surfaces of which contain an aluminosilicate zeolite catalyst having a Constraint Index in the approximate range of about 1 to 12 and a silica/alumina ratio in a range of about 20 to 5000, e.g., ZSM-5 preferably containing gallium or zinc, such that the fuel leaving said channels has an increased octane number, and passing the fuel to the combustion chamber of said engine.
摘要:
A hydrocarbon fuel oil composition comprising a blend of untreated low pour-point distillate oil and a higher pour-point catalytically hydrodewaxed distillate oil. The blend has an unexpectedly low pour point and cloud point. Dewaxing is effected with a ZSM-5 type catalyst.
摘要:
The lower monohydric alcohols and their ethers, especially methanol and dimethyl ether, are converted to a hydrocarbon mixture mostly ethylene, propylene and mononuclear aromatics, by co-feeding elemental oxygen and said alcohol and/or ether to a catalytic reactor that contains as catalyst a composite of antimony oxide and a crystalline aluminosilicate zeolite such as ZSM-5. Co-feeding elemental oxygen effectively inhibits the elution of antimony from the catalytic reactor.
摘要:
An improved method is provided for preparing a crystalline aluminosilicate zeolite having a high silica/alumina mole ratio which comprises adding a source of aluminum ions to a silica-rich amorphous reaction medium at a rate whereby the concentration of aluminum ions in the amorphous phase of the preparation is maintained at steady state during crystallization. Crystallization time is substantially shortened by the present improved method and zeolites synthesized by way of the present improved method exhibit improved steam stability.Also provided are improved crystalline aluminosilicate zeolites prepared by way of the present improved method of synthesis and organic compound conversion therewith.
摘要:
A process for converting relatively ash-free solid polymeric wastes to more valuable liquid, solid, and gaseous products which comprises mixing rubber and/or plastic wastes at high temperatures in a refractory petroleum stream and catalytically cracking the mixture.