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4973396 |
Method of producing sweet feed in low pressure hydrotreaters
Hydrotreating at relatively low pressure and elevated temperature followed by a selective distillation results in lighter fractions substantially free of sulfur and nitrogen. Over half of the total...
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4966681 |
Multiple riser fluidized catalytic cracking process utilizing a C.sub.3 -C.sub.4 paraffin-rich co-feed and mixed catalyst system
A catalytic cracking process is described featuring multiple risers in which a variety of hydrocarbon conversion reactions take place, a stripping unit in which entrained hydrocarbon material is...
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4960505 |
Process for the hydrogenation of hydrocarbon oils
Process for the hydrogenation of hydrocarbon oils by contacting a hydrocarbon oil containing hydrogenatable components and having a boiling range between 130° C. and 520° C. with hydrogen under...
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4954241 |
Two stage hydrocarbon conversion process
Disclosed is a multiple stage process wherein a hydrocarbon feedstock is hydrotreated in a hydrotreating stage. After removal of ammonia and hydrogen sulfide from the hydrotreated feedstock, the...
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4943366 |
Production of high octane gasoline
A moderate pressure hydrocracking process in which a highly aromatic, substantially dealkylated feedstock having a boiling point in the range between 300° and 650° F. is processed directly to...
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4923588 |
Wax isomerization using small particle low fluoride content catalysts
Waxes, for example waxes obtained from dewaxing hydrocarbon oils, called slack waxes, and synthetic waxes such as those obtained by Fischer-Tropsch processes, are isomerized into oils boiling in...
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4917789 |
Catalytic dewaxing process
A process for reducing the pour point of sulfur containing gas oil fractions to produce fractions, including diesel oil of reduced pour point involving sequential hydrotreating and dewaxing of the...
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4913799 |
Hydrocracking catalysts and processes employing non-zeolitic molecular sieves
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...
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4913797 |
Catalyst hydrotreating and dewaxing process
The present invention is directed to a cascade catalytic hydrotreating/dewaxing process, wherein a hydrocarbon feedstock containing waxy components is treated. The hydrotreating phase precedes the...
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4908120 |
Catalytic dewaxing process using binder-free zeolite
A lubricant dewaxing process which is useful with difficult feeds, especially highly waxy feeds having paraffin contents in excess of 25 weight percent or feeds with high nitrogen levels, employs...
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4902405 |
Fixed bed hydrocracking process
A process for converting a gas oil range petroleum feedstock into lighter petroleum products by: (a) charging the gas oil range petroleum feedstock and hydrogen to a first fixed bed...
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4897178 |
Hydrocracking catalyst and hydrocracking process
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...
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4894144 |
Preparation of lower sulfur and higher sulfur cokes
A virgin heavy oil is hydrotreated, separated into a light fraction and a heavy fraction which are separately delay coked to obtain (a) a coke product of low sulfur content suitable for use as...
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4875992 |
Process for the production of high density jet fuel from fused multi-ring aromatics and hydroaromatics
A process for the conversion of a feed rich in fused two-ring aromatic and fused two-ring hydroaromatic hydrocarbons, notably light cat cycle oil, furnance oils, coal liquids, tar sands liquids,...
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4875998 |
Hot water bitumen extraction process
A method and apparatus for a combined solvent and hot water extraction of bitumen oils from tar-sands ore. The crushed tar-sands ore is conditioned in hot water while excluding air, after which...
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4871445 |
Hydrocarbon conversion
A hydrocracking process, of especial use in producing high octane gasoline from gas oils and the like, comprises contacting a gas oil or other hydrocarbon feedstock under hydrocracking conditions...
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4859311 |
Catalytic dewaxing process using a silicoaluminophosphate molecular sieve
An improved process for catalytically dewaxing a hydrocarbon oil feedstock by contact of the feedstock with a catalyst is disclosed where the catalyst comprises an intermediate pore size...
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4857169 |
Hydrocracking process utilizing a catalyst having a reduced zeolite content
A catalyst composition composed of a porous, inorganic refractory oxide in intimate combination with between about 40 weight percent and about 70 weight percent of a crystalline aluminosilicate Y...
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4846959 |
Manufacture of premium fuels
A process is provided wherein premium fuels are manufactured from a high sulfur, low pour point feed and a low sulfur, high pour point feed. The feeds are treated individually (blocked operation)...
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4830729 |
Dewaxing over crystalline indium silicates containing groups VIII means
Catalytic dewaxing of wax containing hydrocarbon feedstocks is undertaken in the presence of a catalyst composition comprising a dehydrogenation metal in combination with a non-acidic microporous...
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4831208 |
Chemical processing with an operational step sensitive to a feedstream component
The present invention relates to a chemical process involving a processing step which is sensitive to the presence of at least one component contained within the stream to be processed and to an...
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4828676 |
Process for the production of ultra high octane gasoline, and other fuels from aromatic hydrocrackates
A process for the production of high octane gasoline, or high octane gasoline blending components from a sulfur and nitrogen-containing feed composition of wide boiling range rich in fused...
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4826586 |
Single riser fluidized catalytic cracking process utilizing a C.sub.3-4 paraffin-rich co-feed and mixed catalyst system
There is provided a catalytic cracking operation featuring a single riser reaction zone having a lower and an upper section wherein a variety of hydrocarbon conversion reactions takes place, a...
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4822761 |
Method and apparatus for cooling fluid solid particles used in a regeneration system
A process for upgrading residual portions of crude oils comprising metal contaminants and Conradson Carbon contributing components by the combination of thermal visbreaking with fluid inert solids...
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4814063 |
Process for the preparation of super needle coke
Described is the method of producing the super needle coke from graphite electrodes, wherein the starting material derived from coal tar or the starting material derived from coal tar and...
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4812222 |
Production of lubricasting oils by hydrocracking
A proces for hydrocracking 343° C. + feedstock which contains polycyclic aromatics to form a lube base stock having enhanced oxidation stability and viscosity index is disclosed. The process...
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4810355 |
Process for preparing dehazed white oils
The process of the invention relates to the production of dehazed white oil possessing long-term low temperature storage stability. The white oil is dehazed with a dehazing catalyst comprising a...
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4801373 |
Process oil manufacturing process
An improved method for producing a hydrotreated oil from a naphthenic feed is described. The process comprises passing the naphthenic feed through the multistage hydrotreating process with...
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4792390 |
Combination process for the conversion of a distillate hydrocarbon to produce middle distillate product
A process for the conversion of an aromatic-rich, distillable gas oil charge stock which is essentially free from asphaltenic hydrocarbons and possesses an aromatic hydrocarbon concentration...
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4790927 |
Process for simultaneous hydrotreating and hydrodewaxing of hydrocarbons
Waxy shale oil feeds containing organonitrogen and/or organosulfur components are contacted with a catalyst comprising a Group VIB metal component on a support containing silicalite and a porous...
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4789457 |
Production of high octane gasoline by hydrocracking catalytic cracking products
A moderate pressure hydrocracking process in which a highly aromatic, substantially dealkylated feedstock is processed directly to high octane gasoline by hydrocracking over a catalyst, preferably...
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4786400 |
Method and apparatus for catalytically converting fractions of crude oil boiling above gasoline
A dual riser cracking operation in combination with sequential stages of catalyst regeneration in which the second regeneration stage is a riser regenerator is described in combination with deep...
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4780193 |
Process for hydrotreating catalytic cracking feedstocks
Catalytic cracking of hydrocarbon feedstocks is improved by hydrotreating the cracking feed under conditions of relatively low temperature, typically below 390° C. for start-of-cycle, and high...
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4776945 |
Single-stage hydrotreating process
A process is provided for hydrotreating hydrocarbon oils having a tendency to deactivate hydrotreating catalysts by coke formation, said oils selected from the group consisting of (a) oils...
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4773987 |
Shape-selective conversion of organic feedstock using clathrate group tectosilicates
This invention relates to an efficient process for shape-selective conversion of organic feedstock with a catalyst comprising a Clathrate Group tectosilicate such as ZSM-39 and a highly siliceous,...
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4762608 |
Upgrading of pyrolysis tar
Pyrolysis tars are upgraded by hydrotreatment in the presence of a catalyst having a hydrogenation component and an acidic component. The treated pyrolysis tars are used to produce premium cokes...
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4761220 |
Hydroprocessing catalyst fines as a first-stage catalyst in a two-stage, close-coupled thermal catalytic hydroconversion process
A process for the production of transportation fuels from heavy hydrocarbonaceous feedstock is provided comprising a two-stage, close-coupled process, wherein the first stage comprises a...
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4755280 |
Process for improving the color and oxidation stability of hydrocarbon streams containing multi-ring aromatic and hydroaromatic hydrocarbons
A process for improving the color and oxidation stability of feed characterized as an admixture of liquid hydrocarbon compounds, inclusive of fused multi-ring aromatic and hydroaromatic...
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4755279 |
Process for the manufacture of lubricating oils
The present invention provides for a process for reducing the pour point of a hydrocarbon feedstock containing nitrogen- and sulfur-containing impurities. The hydrocarbon feedstock is contacted...
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4744884 |
Process for producing lubrication oil of high viscosity index
Full-range shale oils or fractions thereof, after hydrotreating, or hydrowaxed and then hydrogenated to produce lubricating oil fractions boiling above 650° F., having a pour point at or below...
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4743355 |
Process for producing a high quality lube oil stock
A waxy hydrocarbon feedstock is converted into a high quality lube oil stock of reduced pour point by hydrodewaxing the feedstock in the presence of molecular hydrogen and a hydrodewaxing catalyst...
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4743354 |
Process for producing a product hydrocarbon having a reduced content of normal paraffins
A waxy hydrocarbon feedstock is converted into a product hydrocarbon of reduced normal paraffin content by either dewaxing or hydrodewaxing the feedstock in the presence a dewaxing or hydrodewaxing...
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4740291 |
Upgrading of pyrolysis tar using acidic catalysts
Pyrolysis tars are upgraded by hydrotreatment thereof in the presence of an acidic catalyst. The treated pyrolysis tars are used to produce premium cokes useful in the production of graphite...
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4737261 |
Process for the production of premium grade needle coke from a hydrotreated SRC material
The invention disclosed in this application is a process for the production of a premium grade needle coke which is historically feedstock dependent. The selected feedstock for this process is a...
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4713167 |
Multiple single-stage hydrocracking process
A multiple single-stage process for the conversion of heavy hydrocarbonaceous charge stock into a lower boiling distillate hydrocarbon product. Fresh charge stock and hydrogen are introduced into a...
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4695365 |
Hydrocarbon refining process
A spindle oil is hydrotreated and then hydrodewaxed in the presence of a catalyst containing at least 70 percent by weight of an intermediate pore molecular sieve in the support so as to produce a...
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4689137 |
Hydrocracking catalyst of improved activity
A catalyst composition composed of a crystalline aluminosilicate Y zeolite, normally having a silica-to-alumina mole ratio of about 6.2 or above, in combination with a porous, inorganic refractory...
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4689312 |
Procedure for regenerating platinum containing zeolite catalyst compositions
An improved regeneration procedure is described for restoring the hydrogen chemisorption of aged platinum containing zeolite catalyst compositions. The process includes subjecting th catalyst to...
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4664775 |
Method for manufacturing low pour point petroleum product with zeolite TSZ
This invention relates to a method for catalytically manufacturing a low pour point petroleum product from distillates of crude oil, and more particularly to a method for economically manufacturing...
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4659452 |
Multi-stage hydrofining process
A two-stage hydrotreating process comprises the steps of (1) contacting a liquid hydrocarbon-containing feed stream, which contains nickel, vanadium and Ramsbottom carbon residue, with hydrogen and...
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