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6875341 |
Process for enhancing the value of hydrocabonaceous natural recources
A process for upgrading hydrocarbonaceous oil containing heteroatom-containing compounds where the hydrocarbonaceous oil is contacted with a solvent system that is a mixture of a major portion of a...
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6866772 |
Extraction of aromatics from hydrocarbon oil using furfural-co-solvent extraction process
An improved furfural extraction process for lube oil base-stock production from hydrocarbon oils containing aromatic type material by the addition of a solvent comprising of furfural and a...
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6802960 |
Two stage extraction oil treatment process
A process for the production of a process oil, the process comprising: a) contacting a petroleum distillate with a polar solvent in an extraction column which operates with a bottom temperature of...
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6395953 |
Process for preparing purified conjugated diene
Processes for producing a purified conjugated diene comprise feeding a petroleum fraction containing the conjugated diene to an extractive distillation column, feeding an extraction solvent to the...
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6146520 |
Selective re-extraction of lube extracts to reduce mutagenicity index
A process for reducing the Mutagenicity Index and/or the PCA content of a lubricating oil extract by re-extracting a lubricating oil extract with a second extraction solvent, different from the...
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5965784 |
Process and apparatus for extracting aromatic compounds contained in a hydrocarbon feedstock
An extraction process and an apparatus for separating aromatic compounds contained in a liquid hydrocarbon feedstock where the feedstock feed into the lower part of an extraction column is brought...
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5922193 |
Addition of ethers or aldehydes to furfural for aromatic extractions
A process to improve the performance of furfural for aromatics extraction from gas oils and lube distillates by the addition of ethers and/or aldehydes, preferably having a dielectric constant less...
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5120900 |
Integrated solvent extraction/membrane extraction with retentate recycle for improved raffinate yield
Raffinate yield from solvent extraction is improved when the extract phase recovered from the solvent extraction process is subjected to a membrane separation step wherein a saturates/1-ring...
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5095170 |
Intergrated membrane pre-extraction/solvent extraction of distillates
The yield, raffinate product quality, and throughput of the selective solvent extraction of hydrocarbon feeds is improved by subjecting the hydrocarbon feeds from which aromatic hydrocarbons are to...
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4909927 |
Extraction of hydrocarbon oils using a combination polar extraction solvent-aliphatic-aromatic or polar extraction solvent-polar substituted naphthenes extraction solvent mixture
Hydrocarbon oils, particularly petroleum oils, more particularly lube, transformer, white oil and other specialty oils can be extracted to remove aromatic hydrocarbon components therefrom using a...
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4866632 |
Control means and method for solvent refining unit
The control system and method of the present invention controls a solvent refining unit which treats charge oil with a solvent in a refining tower to yield raffinate and extract-mix, strippers...
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4746420 |
Process for upgrading diesel oils
A process for upgrading diesel oil comprising the steps of: (1) reacting the diesel oil with a nitrogenous treating agent; (2) contacting the diesel oil from step (1) above with (a) a primary...
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4399025 |
Solvent extraction process for rerefining used lubricating oil
In accordance with the present invention, a process is provided for removing impurities from heavy and light lube oil fractions that have been obtained from waste lubricating oil. The impurities in...
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4381234 |
Solvent extraction production of lube oil fractions
An improved solvent extraction process is described for the preparation of lube oil products, the improvement whereby the solvent contains an additive which facilitates phase separation and...
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4360420 |
Distillation and solvent extraction process for rerefining used lubricating oil
Used oil is rerefined by distillation and extraction with tetrahydrofurfuryl alcohol. In accordance with the process, used oil is rerefined by distillation to remove a volatile forecut followed by...
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4304660 |
Manufacture of refrigeration oils
Lubricating oils suitable for use in refrigeration equipment in admixture with fluorinated hydrocarbon refrigerants are produced by solvent extraction of naphthenic lubricating oil base stocks,...
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4045333 |
Aromatic purification process
Traces of furfural are removed from an aromatic feed by passing the aromatic feed containing greater than 50 ppm furfural through a bed of solid particles of a selected treating agent.
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4045332 |
Solvent extraction
The degradation of furfural, used in the solvent extraction of aromatics, is inhibited by the use of a furfural-soluble, recoverable amine having a pKa greater than that of aniline. The preferred...
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3977964 |
Stabilization of hydrocracked lube oils
A process for the production of lubricating oil base which is stable to ultraviolet light, which comprises extracting a mixture of a hydrocracked oil and decanted oil with furfural.
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3912618 |
Oil treatment process
A method of treating a mineral lubricating oil feedstock comprises contacting the mineral oil feed-stock counter-currently with furfural in a first extraction column and recovering from the first...
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3546093 |
RUBBER OILS FROM LAGOMEDIO CRUDE
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3546108 |
NOVEL SOLVENT FOR THE EXTRACTION OF AROMATIC HYDROCARBONS FROM HYDROCARBON MIXTURES AND THE PROCESS FOR USE THEREOF
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3539504 |
FURFURAL EXTRACTION OF MIDDLE DISTILLATES
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3488283 |
PREPARATION OF TWO DIFFERENT LUBE OIL FRACTIONS BY SINGLE SOLVENT EXTRACTION
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3761403 |
SIMULTANEOUS EXTRACTION OF MIXTURES OF SUBSTITUTED AND UNSUBSTITUTED AROMATICS
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3567626 |
PROCESS FOR REDUCING THE SATURATE CONTENT OF AN OIL
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3812163 |
METHOD FOR THE PREVENTION OF THE FORMATION OF SOLID RESIDUES ON THERMAL TREATMENT OF FUFURAL OR FURFURALEXTRACT MIXTURES
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3825489 |
EXTRACTION PROCESS
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3458432 |
LUBE OIL REFINING PROCESS
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3449462 |
SEPARATION PROCESS
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3349028 |
Continuous solvent extraction of decant, cycle and gas oils
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3317423 |
Process for solvent extraction of aromatics from aromatic-paraffinic hydrocarbon mixture
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3317422 |
Extraction of aromatic hydrocarbons from hydrocarbon mixtures
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3291727 |
Solvent separation of monocyclic aromatic, dicyclic aromatic and non-aromatic hydrocarbons
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3287260 |
Solvent separation of highly concentrated aromatic extracts
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3247101 |
Hydrocarbon treating process
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3242227 |
Process for the separation of conjugated diolefines from allenes and acetylenes
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3228963 |
Process for purification of complex acids
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3205167 |
Solvent extraction of hydrocarbon mixtures
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3168463 |
Solvent extraction with a furfuralfurfuryl alcohol-water solvent
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3151061 |
Monitor for control of liquid foaming
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3150934 |
Apparatus for effecting fluidfluid contact
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3132093 |
Furfural solvent separation of aromatics from liquid mixtures
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3093576 |
Refining of crude petroleum
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3079449 |
Separation of hydrocarbon mixtures with 5-propionoxymethyl furfural selective solvent
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3034969 |
Separation of cyclic and acyclic hydrocarbons by extractive distillation
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2939838 |
Petroleum treating process
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2935468 |
Selective solvent refining process and solvent recovery
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2882219 |
Recovery of cracking feed and asphalt
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2879223 |
Method for producing a lubricating oil
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