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JPH064485B2 |
Process for the preparation of a composite crystalline aluminum silicate by maintaining an aqueous alkaline starting mixture comprising one or more silicon compounds, one or more aluminium compounds, one or more compounds of metals from ...
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JPH0586991B2 |
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.
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JPH0586833B2 |
Refined waxes and dewaxed lubricating oil basestocks are simultaneously produced in a reversed deoiling-dewaxing process employing conventional dewaxing solvents and existing process equipment. Improved yields, lower solvent usage, and h...
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JPH0585206B2 |
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JPH0585205B2 |
Dewaxing aids used to facilitate the separation of waxes from waxy hydrocarbon oils in solvent dewaxing processes are recovered from the solvent free separated wax (1) by means of an ultrafiltration process employing a selective membrane...
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JPH0578598B2 |
Dewaxing processes for hydrocarbon feedstocks are disclosed using novel catalysts comprising non-zeolitic molecular sieves, such as the silicoaluminophosphates of U.S. Patent No. 4,440,871. The products of the instant dewaxing processes ...
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JPH0578599B2 |
A process is disclosed for the solvent dewaxing of wax containing hydrocarbon oils, preferably waxy petroleum oils most preferably waxy lubricating or transformer oils. The process employs methyl tertiary butyl ether as the dewaxing solv...
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JPH0572438B2 |
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JPH0562160B2 |
A dewaxing process is disclosed which will operate for longer periods of time involving contacting a feedstock having a 50 volume percent boiling point greater than 482 DEG C (900 DEG F) with a catalyst composite of a crystalline alumino...
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JPH0552354B2 |
A straight-chain paraffin producing material obtained by (i) treating a thermal-cracked oil distillate boiling in the range of 120 DEG to 290 DEG C and containing aliphatic olefins, at a temperature of 0 DEG to 330 DEG C in liquid phase ...
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JPH0546399B2 |
A method for selectively dewaxing a waxy hydrocarbon oil feedstock comprising contacting said waxy hydrocarbon oil stock in the presence of hydrogen with a zeolite (1) which has been chemically modified by reaction, under dry, anhydrous ...
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JPH05156264A |
PURPOSE: To effect separation in excellent selectivity and in a high amount of a permeate by bringing a charge containing a dewaxed oil and a dewaxing solvent into contact with a non-rigid silicone elastomer separation membrane layer tre...
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JPH0592126A |
PURPOSE: To separate water from a water-contg. mixture of toluene and methyl ethyl ketone used for dewaxing of lube oil at a high selectivity and a high flow rate. CONSTITUTION: A process for separating water from a water-contg. mixture ...
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JPH0472579B2 |
Heavy oils are simultaneously subjected to hydrocracking and dewaxing using a catalyst comprising zeolite beta and an X or Y or other faujasite zeolite together with a hydrogenation component. The process is able to effect a bulk convers...
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JPH04288398A |
PURPOSE: To provide a process for dewaxing a wax-containing hydrocarbon oil which comprises precipitating the wax from the oil and separating the wax. CONSTITUTION: The precipitation of wax is practiced in the presence of polymer (a) at ...
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JPH04275392A |
PURPOSE: To recover a 3-6C hydrocarbon solvent from dewaxed oil and/or deasphalted oil by a permselective method passing the solvent through an interfacially polymerized membrane under reverse osmosis conditions. CONSTITUTION: Dewaxed oi...
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JPH04233996A |
PURPOSE: To obtain a low-pour-point high-boiling high-viscosity index dewaxed oil in high yield by mixing a low-boiling conventional VI wax-containing oil with a high boiling VI oil and dewaxing the mixture by co-treatment under usual de...
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JPH0437115B2 |
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JPH0428418B2 |
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JPH0417692B2 |
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JPH0477598A |
PURPOSE: To prevent clogging of filter, quicken filtration rate and decrease hot washing times by using a condensate of chlorinated paraffin and biphenyl as a filtration assistant. CONSTITUTION: A high polymer compound having 2,000-60,00...
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JPH048370B2 |
Hydrocarbon oils, in particular lubricating oils, transformer oils, kerosines or gas oils, are hydrodewaxed over a composite crystalline aluminium silicate as catalyst, which has been prepared from a pyridine-containing base mixture.
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JPH0377836B2 |
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JPH03223394A |
PURPOSE: To separate efficiently a dewaxing solvent and a dewaxed oil, by bringing a mixture containing a dewaxing solvent and a dewaxed oil into contact with a separation membrane made of a nonporous polyimine separation layer crosslink...
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JPH0345010B2 |
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JPH0330401B2 |
Process for solvent transmission from an extract/solvent mixture to a feed to be extracted, by passing the feed along one side of a membrane and the extract/solvent mixture along the other side thereof.
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JPH03332B2 |
Hydrocarbon conversion processes with crystalline silicates surrounded by an alumina containing isostructural shell are claimed.
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JPH02289685A |
PURPOSE: To obtain a high-purity dewaxing retentate in a high yield by heating a dewaxed ail stream and/or precipitated wax stream contg. a dewaxing aid, and bringing it into contact with a specific ultrafiltration polymer membrane. CONS...
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JPH0250959B2 |
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JPH0245676B2 |
Improvements in processes for stripping solvent from dewaxed oils and deoiled waxes; the use of an inert gas (such as nitrogen) as a stripping agent for removing solvent from dewaxed oils, deoiled waxes and slack waxes resultant from sol...
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JPH02235991A |
PURPOSE: To remove cloudiness from a dewaxed hydrocarbon oil mixture by combining a dewaxed oil mixture and a non-dewaxed oil mixture to simultaneously filter them and introducing free charge being net single polarity into the dewaxed oi...
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JPH02233516A |
PURPOSE: To enable the production of composite crystalline Ga- or Fe-contg. silicate in the presence of a single org. type plate by maintaining an aq. starting material contg. Si, iron or gallium compd. and diaminoalkane under heating up...
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JPH02233112A |
PURPOSE: To efficiently and completely repair a damaged region of a solvent dewaxing filter by washing this damaged region with an oil-wax solvent and drying the filter, then applying an epoxy adhesive to the damaged region and further c...
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JPH0238637B2 |
Dewaxed lube base stock oil which forms a wax haze on storage at a temperature above its cloud point is treated by contacting the oil and hydrogen with a zeolite catalyst such as ZSM-5 to eliminate the wax-haze formation. The method may ...
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JPH0224875B2 |
A process for the solvent dewaxing of wax-containing oils is disclosed. The process is characterized by the use of certain crystal modifiers in conjunction with an apportionment of the oil feedstock to provide an initial solvent to oil r...
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JPH0275329A |
PURPOSE: To reduce the cloud point of the material by performing the operation of ultrafiltration separation at a temp. slightly above the phase transition temp. of a higher-melting component to be separated, at the time of subjecting co...
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JPH023840B2 |
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JPH023839B2 |
Catalytically dewaxed lubricating base stock oils that have improved resistance to oxidation are produced by pretreating the waxy furfural raffinate with a zeolite sorbent prior to dewaxing with a zeolite catalyst such as ZSM-5, and cond...
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JPH028295A |
PURPOSE: To efficiently provide highly pure retentate for dewaxing accelerator at a high temperature and under high pressure, by contacting stream of dewaxing oil with an ultra filtration membrane made from polyimide polymer. CONSTITUTIO...
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JPH01308491A |
PURPOSE: To produce a lubricant of the subject viscosity grade from a produced isomerized object with a higher yield by subjecting a wax to an isomerization process under the specific conditions on an isomerization catalyst with a low pr...
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JPH01308492A |
PURPOSE: To yield maximumly a fuel product as intermediate distillation by bringing paraffin wax in contact with hydrogen in a hydrogenation isomerization zone under the existence of a specific catalyst, and separating the obtained produ...
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JPH01301791A |
PURPOSE: To obtain a lubricating base oil stock or mixture stock with high yield, by performing the isomerization of wax by using a catalyst in which Pd is supported on fluorinated alumina. CONSTITUTION: The slack wax or synthetic wax co...
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JPH01301790A |
PURPOSE: To obtain a lubricating base oil or blend stock oil having low pour point and high viscosity index with high yield, by performing the isomerization in the presence of a (fluorinated) alumina catalyst of the specific physical pro...
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JPH01297494A |
PURPOSE: To obtain dewaxed hydrocarbonate oil having a peculiar crystal structure having a filtering characteristic being superior in filter rate by means of a high rate by controlling whole ΔTs produced in respective solvent injecting ...
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JPH01281148A |
PURPOSE: To enhance catalytic activity and selectivity by depositing a group VIII hydrogenation metal on alumina fluorided or a support contg. the alumina fluorided and having a prescribed surface area, thereby forming a wax isomerizatio...
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JPH01281147A |
PURPOSE: To obtain an isomerized wax product of a high yield by depositing a hydrogenation metal on a refractory metal oxide support and halogenating the metal, then crushing the catalyst to expose the inner surfaces of the catalyst part...
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JPH0153101B2 |
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JPH0150356B2 |
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JPH0147520B2 |
An improved solvent extraction process is described for the preparation of lube oil products, the improvement whereby the extract phase is contacted with a coalescing surface prior to its exit from the reactor.
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JPH01240596A |
PURPOSE: To obtain a dewaxing auxiliary having low chlorine content, by adding a compound having reactivity higher than naphthalene to chlorinated paraffin after finishing large part of reaction of naphthalene with chlorinated paraffin a...
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