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Patent Searching and Data


Matches 701 - 750 out of 928

Document Document Title
JPS62220586A
PURPOSE: To desulfurize a methylnaphthalene oil of tar type in high desulfurization ratio and in high yield, by heating at a specific temperature the methylnaphthalene oil of tar type from which nitrogen-containing compounds are removed ...  
JPS62184097A  
JPS62164790A  
JPS6232731B2  
JPS6295387A  
JPS62500791A  
JPS6214600B2  
JPS6268895A  
JPS6158110B2  
JPS6155009B2  
JPS6154078B2  
JPS6146518B2  
JPS6145680B2  
JPS6121590B2  
JPS6121719B2  
JPS6121510B2  
JPS6121511B2  
JPS6189215A
PURPOSE: To effect the selective separation of the titled polymer, and to obtain debituminized oil, by adding a solvent selected from specific hydrocarbons or ketones to the thermal cracking residue of naphtha at a specific ratio, and ri...  
JPS6116311B2  
JPS6147793A  
JPS615512B2  
JPS6128583A
PURPOSE: To refine a base oil without corroding the instrument and causing environmental pollution by drain, by recycling part of a oil fraction, obtd. by subjecting a lubricating base oil to a specified treatment, to a steam stripping c...  
JPS61878B2  
JPS6058279B2  
JPS60252693A
PURPOSE: To obtain an extender of a fuel heavy oil, utilize effectively residual solid as an assistant fuel and detoxicate the residual ash thereof, by dehydrating ship bottom residual oil under specific conditions by heating with oil, a...  
JPS60248795A
PURPOSE: Fine particles of metals in waste oil are removed by adsorption, centrifugation, filter press, etc. step by step, finally a trace amount of metal powder of finest particle sizes remaining is recovered by means of static oil clea...  
JPS6052190B2  
JPS6051518B2  
JPS60186590A  
JPS60106885A
PURPOSE: To improve the yield of a light oil component, by separating thermal reforming reaction products into gas, light oil and heavy residual oil, subjecting at least part of the residual oil to a gravity precipitation treatment and a...  
JPS60106884A
PURPOSE: To improve the yield of an oil component, by separating thermal reforming reaction products into gas, light oil and heavy residual oil, and subjecting the residual oil to a gravity precipitation treatment to recover a liquid con...  
JPS6092390A  
JPS6092389A  
JPS6060189A
PURPOSE: To remove colored materials with simple equipment in a simple manner, by treating a colored material-contg. oil with an acid, removing pitch formed, applying voltage to the residual acid radical to ionize it and adsorbing it by ...  
JPS609549B2  
JPS59179588A
PURPOSE: To obtain easily a naphthenic lubricating oil having a high viscosity and low acid value, by neutralizing a naphthenic crude oil, etc. fully with an excess aqueous solution of caustic alkali, and distilling the resultant treated...  
JPS59174688A
PURPOSE: To separate and to purify a liquefied oil of coal simply, inexpensively and continuously, by passing the liquefied oil of coal through an adsorption column so that substances containing nitrogen and oxygen are removed, passing a...  
JPS5927792B2  
JPS5974185A  
JPS5966494A
PURPOSE: To recover oil components free from impurities such as deteriorated substances, sludge, admixtures, etc. at all, by purifying coarsely a waste oil of flon synthetic lubricant, extracting it with petroleum ether. CONSTITUTION: Im...  
JPS5945389A  
JPS592479B2  
JPS594686A  
JPS58187487A
PURPOSE: To separate and remove the finely divided ash from the coal liquefaction product, in high efficiency, by adding a specific acidic aqueous solution to the coal liquefaction product, stirring the mixture under heating, adding a wa...  
JPS58180435A
PURPOSE: To recover easily indene of high purity, by distilling a tar type light oil containing the indene to obtain a fraction in which the indene is concentrated to some extent, washing the resultant fraction with an alkali, and distil...  
JPS58152090A
PURPOSE: To carry out the collection and treatment of heavy oil, economically and efficiently, by separating crude oil drawn from an oil well with a pump into heavy oil, etc. in a precipitation tank, heating and distilling the heavy oil,...  
JPS5833911B2  
JPS5893788A
PURPOSE: To effectively and easily separate oil and foreign matter in a sludge, by adding a chemical contg. a silicate and a polymer to an oil-contg. sludge and flocculating the sludge by causing aggregation and adsorption followed by pr...  
JPS5869288A  
JPS5863785A
PURPOSE: To purify impurities, e.g. sulfur, even in a lubricating oil containing an additive for preventing the premature deterioration, by adding a detergent- dispersant in a specific proportion to the lubricating oil, and passing a DC ...  

Matches 701 - 750 out of 928