1297 results about "Naphthenic acid" patented technology

Described herein are compositions and methods for using metal oxides to upgrade oil. Metal oxides may be used as catalysts to reduce the TAN of the oil by converting carboxylic acids such as naphthenic acids into non-corrosive products. In some cases, the conversion occurs by a decarboxylation of the carboxylic acid to produce CO₂. A second process promoted by metal oxides is hydrocarbon cracking. Cracking decreases the viscosity and increases the API, and produces lower molecular-weight hydrocarbons that are useful for many fuels and lubricants. Reductions in TAN and the increases in API improve the quality of increase the value of oil.

The invention relates to a preparation method of a polyether-grafted chitosan derivative crude oil desalting demulsifier. The preparation method comprises the following specific steps: firstly, performing formylation modification on polyethylene glycol monoethylether; secondly, preparing glycidyl dimethyl alkyl ammonium chloride; thirdly, preparing quaternarization carboxyalkyl chitosan; fourthly, enabling formylation modified polyethylene glycol monoethylether to react with carboxy alkyl chitosan to obtain the polyether-grafted chitosan derivative crude oil desalting demulsifier. The polyether-grafted chitosan derivative crude oil desalting demulsifier disclosed by the invention is prepared by taking chitosannatural polymeric compounds as raw materials, and has the advantages of wide sources, naturalness, no toxicity, sustainability, good biocompatibility of a product, degradability and the like. The prepared demulsifier is good in demulsifying and dehydrating effect; meanwhile, a demulsifying molecule contains a large amount of carboxyalkyl groups and quaternary ammonium salt groups which have strong combining capacity to metal cation, ions with negative electricity such as naphthenic acid radicals as well as particles of which the surfaces are electronegative, so the polyether-grafted chitosan derivative crude oil desalting demulsifier has capacity of removing oil-soluble salts while demulsifying.

The invention relates to a preparation method of an efficient crude oil desalting demulsifier. The preparation method comprises the following specific steps: (1) performing isocyanic acid esterification modification on methoxy polyethylene glycol; (2) preparing glycidyl dimethyl alkylammonium chloride; (3) preparing quaternized carboxyalkyl chitosan; (4) modifying the methoxy polyethylene glycol and the quaternized carboxyalkyl chitosan for reaction to obtain a target product, namely, methoxy polyethylene glycol-grafted quaternized carboxyalkyl chitosan. By taking chitosan type natural macromolecular compounds as raw materials, the efficient crude oil desalting demulsifier has many advantages of wide availability, nature, nontoxicity, sustainability, high biocompatibility, degradability and the like. The prepared demulsifier is good in demulsifying and dehydration effect; meanwhile, molecules of the demulsifier contain a large quantity of carboxy alkyl groups and quaternary ammonium salt groups, so that the demulsifier is extremely high in combination capacity for negatively charged ions such as metal cations and naphthenic acid radicals, and particles with electronegativity on the surfaces, and can remove oil-soluble salt during dehumidification.

The invention relates to a synthesis method of a crude oil desalting demulsifying agent. The method specifically includes the steps of firstly, conducting p-nitrophenyl ester modification on methoxypolyethylene glycol; secondly, preparing glycidyl dimethyl alkyl ammonium chloride; thirdly, preparing quaternized carboxy alkyl chitosan; fourthly, making the modified methoxypolyethylene glycol react with quaternized carboxy alkyl chitosan to obtain a product, namely polyethylene glycol questin grafted quaternized carboxy alkyl chitosan. A chitosan type natural high-molecular compound serves as the raw material and has the advantages of being wide in resource, natural, free of toxin, sustainable, good in product biocompatibility, degradable and the like; The prepared demulsifying agent is good in demulsifying dewatering effect; meanwhile, due to the fact that lots of carboxy alkyl groups and quaternary ammonium salt groups are contained in demulsifying agent molecules and have strong binding capacity with metal cations, naphthenic acid radicals and other ions with negative charges and particles with surface electronegativity, the oil-soluble salt removing capacity is achieved during demulsifying.

The invention discloses an iron-titanium-vanadium extracting method from high-titanium ferrovanadium concentrate ore. By adopting the method to make steel, fine TiCI4 and V2O5 have the advantages that: technological processes are simple and reasonable; energy consumption is low; yield rate of iron-titanium-vanadium is high and three wastes (waste gas, waste water and waste slag) are fewer. The method comprises the steps: iron smelting: a high furnace or an electric furnace is adopted to smelt iron to make melten iron containing vanadium and chromium and make titanium-enriched slag as byproduct and the rate of vanadium reduced and added into iron is 60-78 percent; single-slag steel-making: melten iron containing vanadium and chromium is put into a converter furnace directly to make steel by the function of oxygen blowing, and steel slag containing vanadium and chromium is obtained as byproduct; carbonized titanium-vanadium-chromium slag with 80-95 percent of carbonization rate is made by smelting reduction carbonization by the electric furnace smelting selection; TiCl4 containing vanadium is made by selective chlorination of carbonized titanium-vanadium-chromium slag in a fluidized bed at low temperature, and residual slag of chlorination containing CrCl3 is byproduct; vanadium titanium separation: VOCI3 is directly reduced by cycloolefine or naphthenic acid to make VOCl2 which can not dissolve in TiCI4, while the VOCI3 can be dissolved in TiCI4. Then the fine TiCI4 is made and the slurry TiCI4 containing rich vanadium is also made as byproduct; V2O5 is extracted from the rich vanadium containing slurry TiCI4.

The invention discloses a method for removing aluminum from rare-earth feed liquid, belongs to rare-earth feed liquid treatment technology and aims to provide the method for removing the aluminum from the rare-earth feed liquid, of which the aluminum-removing effect is good, the aluminum-removing cost is low, the rare-earth recovery rate is high, the operation and control are convenient, the process is simple and the investment in equipment is small. The key point of the technical scheme mainly comprises the following steps of: (1) preparing an organic phase from 15 to 25 volume percent of naphthenic acid and 15 to 25 volume percent of alcohol-kerosene; (2) adding the prepared organic phase and the rare-earth feed liquid into a stirring tank in a volume ratio of 2-5:1, starting the tank, stirring and uniformly mixing; (3) adding alkaline solution into the mixed liquid obtained in the step (2) with stirring, wherein the total number of moles of the added alkali is 50 to 100 percent of that of rare-earth elements in the rare-earth feed liquid; and (4) after adding the alkaline solution, continuously stirring for a certain time, stopping stirring and standing for a certain time, wherein the solution is separated into an aqueous phase and an organic phase and the aqueous phase is the rare-earth feed liquid from which the aluminum is removed. The method is applied to aluminum removal for the rare-earth feed liquid.

The invention relates to a combined treatment method of oil-refining wastewater containing naphthenic acid. The combined treatment method of the oil-refining wastewater containing naphthenic acid is characterized in that a pre-treatment technology is added at the front end of an 'anoxic/oxic' ('A/O') step of an oil removing + A/O process, and an advanced treatment process is added at the back end of the 'A/O' step. Air-floatation oil removing effluent enters a modified biological aerated filter to be pre-treated, a filler is subjected to modification treatment, and the combined treatment method adopts upstream continuous operation. Hydraulic loading is controlled in a range of 1.0-3.0 m<3>/m<2>-h, the temperature is controlled in a range of 25-35 DEG C, the reflux ratio is controlled to be 100-150%, the gas-water ratio is controlled to be 3:1-5:1, and an automatic back washing period is controlled to be 48-72 hours. The effluent of the modified biological aerated filter is subjected to treatment of an 'A/O' biochemical system, enters an intermediate reaction tank and then enters a pre-mixing tower in parallel. The effluent of the pre-mixing tower enters a catalytic oxidation tower to quickly oxidize difficultly-biodegradable organic matter in sewage and reduce chemical oxygen demand (COD) of the sewage, and finally treated effluent enters a clean water pond.

The present invention provides a fuel oil additive capable of effectively improving the quality of fuel oils, which comprises an oil-soluble metal salt of organic acid having the general formula MR, where R is an organic acid radical and the corresponding organic acid is a C1-C40 saturated or unsaturated fatty acid, naphthenic acid, aromatic acid or alkylphenol, M is a metal cation and the corresponding metal is an alkali metal, alkali-earth metal, rare-earth metal, transition metal, or the like. The present invention also provides fuel oil products added to the fuel oil additive, including gasoline, diesel oil, kerosene, heavy oil, resid, or the like. The present invention especially provides a gasoline antiknock agent and a gasoline having excellent antiknock property, and this kind of gasoline antiknock agent is characteristic of effectiveness, economy, safety, no environmental pollution, no toxicity to human body, no adverse effect on parts of automobile engine, use convenience, and the like.

The invention discloses a process for lowering acid value of crude oil and distillate oil, which comprises proceeding esterification reaction by menthol with crude oil or naphthenic acid in distillate oil, producing naphthenic acid ester in fixed bed reactor equipped with catalyst, then recovering the non-reacted methanol through distillation. The catalyst comprises carrying agent, which includes aluminium oxide, silica gel, molecular sieve, diatomite and carclazyte, amounting to 20-98 wt% of the catalyst, and active component including Sn or Zn, amounting to 2-40 wt% of the catalyst.

A composition and method of inhibiting corrosion caused by naphthenic acid in fluids includes using a combination of a thiophosphorus compound and a hydrogen sulfide scavenging compound. The hydrogen sulfide scavenging compound significantly enhances the performance of the thiophosphorus compound and may be included at relatively low levels in the composition. The treatment may be applied to fluids including crude oils and lighter fractions thereof.

The invention mixes and pre-extracts the mixed solution of acidic organic extractants such as P507, P204, C272, and naphthenic acid with magnesium bicarbonate and / or calcium bicarbonate solution and rare-earth solution. The rare-earth ions are extracted into the organic phase, then the loaded organic phase containing rare-earth ions are obtained through clarification, and can be used for the extract separation of the mixed rare-earth feed liquid. After a plurality of different levels of extraction, washing, stripping, single rare-earth compounds or rare-earth elements-containing enrichments can be obtained. The magnesium bicarbonate and/or calcium bicarbonate solution are prepared by roasting, digesting, carbonizing magnesite, limestone, calcite, dolomite and similar minerals, so that the content of impurities, such as silicon, iron, aluminum is lower. Ternary phase sediment is not produced in the pre-extraction and extraction separation process, so that the purity of the rare-earth products are not affected. The organic phase does not need ammonia saponification and does not produce ammonia-nitrogen wastewater. By adopting the invention, the production cost of rare-earth products is greatly lowered and the cost for three waste disposal is also greatly saved.

The invention discloses a artificial stone plate prepared by adding cobalt naphthenate accelerator, methylethylketone, light stabilizer, paint and antioxidant into unsaturated polyester resin. The preparation method includes the following steps: firstly modifying the aluminium hydroxide and/or calcium carbonate to get surface modified aluminium hydroxide and/or calcium carbonate or pure aluminium hydroxide powder, then adding cobalt naphthenate accelerator, methylethylketone, light stabilizer, paint and antioxidant into unsaturated polyester resin, uniformly mixing and stirring the mixture in a high speed stirring reactor, adding surface modified aluminium hydroxide and/or calcium carbonate powder or pure aluminium hydroxide powder, stirring and casting the mixture into a mould after vacuum defoamtion, heating up to 60-80 DEG C and curing to get the artificial stone and marble panel.

A process for the separation of production fluids is provided. The production fluids comprise an oil/water emulsion stabilized with fine solids. The emulsion may further comprise asphaltenes and naphthenic acids and resins. The process includes subjecting the emulsion to a flocculating agent to flocculate solids within the emulsion, and separating water and solids from crude oil in a first separator. The process further includes subjecting the separated crude oil to a demulsifier after subjecting the emulsion to a flocculating agent, and further separating water from the crude oil in a second separator. A process for producing fluids from a hydrocarbon-bearing reservoir is also provided, using the separation processes herein.

The invention is directed to a process comprising feeding high TAN feedstreams to a steam cracker, whereby naphthenic acids in the feedstreams are substantially converted to CO, CO₂, and low amounts of smaller acids (e.g., formic, acetic, propionic, and butyric acids). The feedstream is preferably a high TAN feedstream comprising crude or high TAN feedstream which has previously been subjected to a refinery process to remove resid.

The invention relates to a method for separation and purification of fluorescent grade yttrium oxide and europium oxide from waste phosphor powder, comprising the steps of: first conducting impurity removal so as to obtain mischmetal containing Y2O3 and Eu2O3, then dissolving the mischmetal with an acid solution for preparing a rare earth feed liquid, and carrying out extraction with an extraction system after alkaline solvent saponification, thus obtaining the raffinate, washing liquid and strip liquor; adding an oxalic acid solution and conducting filtration, then subjecting the obtained filter residue to calcination, thus obtaining the fluorescent grade yttrium oxide, and yttrium-rich rare earth and europium oxide. The invention has the advantages that, reagents are of wide source, lowprice and easy availability, and the simple process of the method can greatly shorten the extraction process of naphthenic acid. In the invention, three deposition impurity-removal treatments before extraction can remove most impurities and leave only a small amount of aluminium and silicon, so that an emulsification phenomenon in the naphthenic acid extraction system cannot be caused, thus providing a good solution to the problem that naphthenic acid extraction is susceptible to high valent metal ions and results in emulsification.

A floatation process for bauxite to remove S and Si includes such steps as grinding the crude bauxite, adding the yellow catching agent B, reverse floatation for removing S, grinding, adding the match of saponified fatty acid and naphthenic acid, and forward floatation. The resultant bauxite concentrate can be used to prepare aluminum oxide by Bayer method.

A method for the quantitation of the naphthenic acid content of molecular weight less than 600 Daltons in a hydrocarbon composition, in which naphthenic acids are separated from the hydrocarbon composition and applied to a macroreticular ion-exchange resin. The resin is washed and the naphthenic acid-metal ion complexes are eluted from the resin. The number of naphthenic acid-metal ion complexes present in the eluate from the resin are then quantitated.

The invention relates to a treatment method for waste water from processing acid-containing crude oil, and the method is used in the treatment of waste water containing naphthenic acid from the refining process of acid-containing crude oil. The method adopts a combined process including demulsification, cyclone oil removal, dissolved air flotation, ozone oxidation, MBBR and filtering to treat the wastewater containing naphthenic acid discharged from an electric desalting device in the crude oil refining process, and the outlet water after treatment reaches discharge standards. The method can prevent the treatment process of other waste water, such as oil-containing sewage and salt-containing waste water from the influence from naphthenic acid, and benefit the stable operation of oil separation, flotation, biochemical treatment and depth treatment units in final sewage works, so as to solve the problems of unqualified waste water from processing acid-containing crude oil and foaming of biochemical treatment, and provide a good basis for waste water reuse.

The invention relates to a metal processing cutting fluid and specifically relates to a super-high extreme pressure type micro-emulsification cutting fluid and a preparation method thereof. According to the super-high extreme pressure type micro-emulsification cutting fluid, 5# white oil is used as basic oil and is easy to emulsify; emulsification lubricating agents comprise tall oil, oleic diethanolamide, polyoxyethylene(10)nonyl phenyl ether, isononanoicacid, synthetic petroleum sodium sulfonate and zinc naphthenate, and the emulsifying capacity is stronger when the emulsification lubricating agents are matched for using; and more chlorine containing extreme-pressure agent chlorinated paraffin S52 and sulfur containing extreme-pressure agents TPS32 can be emulsified into the basic oil to obtain the super-high extreme pressure type micro-emulsification cutting fluid. According to the super-high extreme pressure type micro-emulsification cutting fluid, emulsification particles are small, and the cutting fluid is stable; simultaneously, a synthetic ester of a fatty acid methyl ester which serves as a lubrication reinforcing agent is added, extreme pressure lubrication requirements of medium-high temperature processing are met, and the super-high extreme pressure type micro-emulsification cutting fluid is suitable for mechanical processing with wider ranges of processing temperatures; and triazine amino-acid esters are used for reinforcing rust protection so that the rust-protecting effects can reach to the best.

The present invention relates to one kind of collecting agent for floating and desilicating bauxite, and the collecting agent consists of industrial chemicals fatty acid, naphthenic acids and hydroximic acid in the weight ratio of 25-98 to 0-75 to 0-25. The re-compounded collecting agent features the mutual solubilization and homogenization of its components and no negative effect of emulsifier. The naphthenic acids have cyclopentyl formic acid with smelting point of -7 deg.c as the main component, and are suitable for low temperature use. The collecting agent is suitable for for floating and desilicating bauxite of different types, especially low grade bauxite, and has high collecting performance, low consumption and good low temperature use effect.

The invention provides biodiesel based fuel oil which comprises the following components by weight: 50-80 percent of crude biodiesel, 4-35 percent of compound emulsifying agent, and one or two mixture of water and methanol, wherein the compound emulsifying agent is the mixture of the two types of materials, the first-type material is one or the mixture of a plurality of oleic acid, palmitoleic acid, naphthenic acid, aliphatic amine polyethenoxy ether with C atomicity being 40-100, dehydration sorbitan fatty acid ester with C atomicity being 40-100, polyoxyethylenec dehydration sorbitan fatty acid ester with C atomicity being 40-100; the second-type material is one or the mixture of a plurality of monoethanol amine, diethanolameine, trolamine, diglycol amine, 1-octanol and tertiary butyl alcohol. The preparation method is as follows: the mixtures are mixed according to the percent by weight and are mixed uniformly so as to obtain transparent solution. The fuel oil has good stability, non layering for a long time, no discolor and no turbidity, and is directly prepared by adopting the crude biodiesel. Methanol or water or the mixture of the water and the methanol is added, thus the consumption of the biodiesel is saved.

A method for reducing the acid value of biodiesel oil is characterized in that: rectification of crude fatty acid methyl ester or fatty acid ethyl ester is carried out; a deacidification agent occupying 0.02 to 4 percent of the total weight of fine fatty acid methyl ester or fatty acid ethyl ester is added after the rectification; the mixture is gradually heated up to 60 to 80 DEG C inside a stirring reaction kettle, and is put in a settling tank when the stirring reaction is carried out for 0.2 to 0.5 hours; after 2-hour settlement, the lower-layer deacidification agent is discharged; the acid value of an upper layer is measured, and the upper layer is put in a finished product tank after the acid value is up to standard; and the deacidification agent can be used repeatedly. The method is simple and does not need complex equipment; meanwhile, the method has low production cost and ideal deacidification effect, and the diesel oil manufactured by the method accords with national standard; the separated deacidification agent can be used repeatedly to produce naphthenic acid amide which is a chemical raw material and can increase the economic benefits of a biodiesel oil enterprise. Tests and a standard method adopted to measure the acid value of biodiesel oil before and after deacidification show that the acid value of biodiesel oil can be reduced more than 90 percent when deacidified through adopting the method.