366 results about "Oxidized nitrogen" patented technology

A method of self-cleaning a plasma reactor upon depositing a carbon-based film on a substrate a pre-selected number of times, includes: (i) exciting oxygen gas and / or nitrogen oxide gas to generate a plasma; and (ii) exposing to the plasma a carbon-based film accumulated on an upper electrode provided in the reactor and a carbon-based film accumulated on an inner wall of the reactor.

The invention discloses a wet method smoke gas denitration technology of two segments of liquid phase oxidation and absorption, which adopts solution or mixtures of one or more of potassium permanganate, sodium chlorite, sodium hypochlorite, calcium hypochlorite, oxyful and chlorine dioxide as oxidizing agents to ensure nitrogen oxide in smoke gas contact and react with the oxidizing agents. After the nitrogen oxide is partially oxidized into nitrogen dioxide, oxidized nitrogen oxide in the smoke gas is absorbed by alkali liquid to generate corresponding nitrite. The technology adopts liquid phase oxidation to replace gas phase oxidation so as to reduce the investment and the running cost, simplify the technical process and the system structure, and enhance the operability. Compared with a method that oxidation and absorption are simultaneously carried out in the liquid phase, the two-segment technology not only can increase the removal efficiency, avoid secondary pollution caused by incomplete absorption of NO2, but also can achieve the purposes of selectively generating and recovering the nitrite in the absorption stage by controlling the oxidation degree of the oxidation stage.

Nanocomposite copper-ceria catalysts are provided, which comprise copper oxide nanoparticles, copper nanoparticles, or a mixture thereof combined with ceria nanoparticles. Methods for making such catalysts are also provided, which involve the steps of (i) combining ceria nanoparticles in an aqueous suspension with copper 2,4-pentanedionate to form a slurry; (ii) heating the slurry formed in step (i) under an inert gas atmosphere or an oxygen-argon atmosphere, at a temperature and for a time sufficient to cause decomposition of the copper 2,4-pentanedionate to form copper nanoparticles and / or copper oxide nanoparticles that are combined with the ceria nanoparticles; and (iii) optionally, subjecting the product formed in step (ii) to a heat treatment process under conditions effective to convert at least some of the copper nanoparticles to copper oxide nanoparticles. The nanocomposite copper-ceria catalysts are useful for low-temperature and near-ambient temperature catalysis, such as the oxidation of carbon monoxide, the reduction of nitric oxide and the conversion of hydrocarbons. The nanocomposite copper-ceria catalysts have a variety of potential applications, for example, in vehicle exhaust emission systems of automobiles and diesel engines, cold starting of automobile engine, fuel cells, lasers, hydrocarbon conversion reactors, air filters for the conversion of carbon monoxide and / or indoor volatile organic compounds, and smoking articles.

An exhaust gas post treatment system for nitrogen oxide and particle reduction of internal combustion engines operated with excess air. An oxidation catalytic converter is disposed in the exhaust gas stream of the engine for converting at least a portion of the nitric oxide in the exhaust gas into nitrogen dioxide. The first particle separator or filter is disposed in the exhaust gas stream downstream of the oxidation catalytic converter for converting carbon particles accumulated in the separator or filter into carbon monoxide, carbon dioxide, nitrogen and nitric oxide with the aid of nitrogen dioxide contained in the exhaust gas. A partial exhaust gas stream is branched off from the exhaust gas stream upstream of the first separator or filter. A metering device adds reduction agent to the partial exhaust gas stream in the form of ammonia or a material that releases ammonia downstream of the supply location due to hot exhaust gas. A second particle separator or filter is disposed in the partial exhaust gas stream downstream of the supply location. The partial exhaust gas stream returns to the exhaust gas stream downstream of both particle separators or filters. An SCR catalytic converter is disposed downstream of the return location for reducing nitrogen oxides in the exhaust gas to nitrogen and water vapor with the aid of ammonia or released ammonia by way of selective catalytic reduction.

The invention relates to a chemical preparation method for a nitrogen-doped graphene quantum dot, belonging to the technical field of nano materials. The invention particularly relates to a preparation method for the nitrogen-doped graphene quantum dot. The method comprises the following steps: firstly, by taking graphite oxide as a carbon source and glycine as a nitrogen source, preparing a nitrogen-doped graphene sheet under a high-temperature annealing condition; then, cutting the deeply oxidized nitrogen-doped graphene sheet into an oxidized nitrogen-doped graphene nano sheet; preparing the nitrogen-doped-graphene quantum dot with super-strong blue fluorescence by way of a hydrothermal reaction. The synthetic method of the nitrogen-doped graphene quantum dot provided by the invention is simple in synthetic process, all raw materials are cheap and easy to get in the market, and the prepared nitrogen-doped graphene quantum dot is high in purity and yield, mono-dispersible and good in water solubility, has a very strong blue fluorescence performance and has a very good application prospect in the application fields of lithium batteries, micro supercapacitors, biological fluorescent labels, solar batteries and the like.

An exhaust gas purifying system includes an exhaust passage, an oxidation catalyst, a selective catalytic reduction catalyst, a urea water supply device, a first heating mechanism and a controller. The exhaust gas discharged from an internal combustion engine flows through the exhaust passage. The oxidation catalyst for oxidizing nitrogen monoxide contained in the exhaust gas to nitrogen dioxide is disposed in the exhaust passage. The selective catalytic reduction catalyst is disposed downstream of the oxidation catalyst. The urea water supply device supplies urea water into the exhaust passage at the upstream of the selective catalytic reduction catalyst. The first heating mechanism heats the oxidation catalyst. The controller controls the first heating mechanism to adjust the temperature of the oxidation catalyst such that molar ratio between nitrogen monoxide and nitrogen dioxide in the exhaust gas flowing into the selective catalytic reduction catalyst become one to one.

The purpose of the present invention is to provide a kind of high-efficiency insecticide. A compound represented by the general formula (1), an insecticide using the compound as an active ingredient, and a preparation method thereof, wherein, A 1 、A 2 、A 3 、A 4 represent carbon atom, nitrogen atom or oxidized nitrogen atom respectively, R 1 , R 2 Respectively represent a hydrogen atom, an alkyl group that may be substituted, etc., G 1 , G 2 represent oxygen atom or sulfur atom respectively, X is the same or different, represent hydrogen atom, halogen atom, C1-C3 alkyl group, trifluoromethyl group, n represents an integer from 0 to 4, Q 1 Represents a phenyl group that may be substituted, a heterocyclic group that may be substituted, etc., Q 2 represents a phenyl group or a heterocyclic group having one or more substituents, and at least one of the substituents represents a C1-C4 haloalkoxy group or the like.

The present invention relates to provides one kind of RE perovskite type catalyst for catalytic oxidation of NO into NO2, and features that the catalyst includes the perovskite type active component A1-xA'xB1-yB'yO3, where, A represents RE metal element La, A' includes Zr, Ce, Sr, Ca, Ba and Pr, B and B' represent transition metal element Fe, Co, Ni, Mn, Cu or Ti, x is 0-0.9, and y is 0-1.0. The catalyst of the present invention has simple preparation process, low cost, and NO oxidizing activity up to 80 % at 300 deg.c. It may be used to replace noble metal catalyst for oxidizing NO in lean combustion tail gas into NO2 to raise the NOx eliminating rate.

The invention discloses a nitrogen dioxide gas sensor and a preparation method thereof, and relates to the technical field of sensors. The nitrogen dioxide gas sensor comprises a substrate; an interdigital electrode is arranged on the upper surface of the substrate; a reduced graphene oxide thin film is deposited on the surface of the interdigital electrode to form a film-covered interdigital electrode structure; a poly-N-methylpyrrole thin film is deposited on the surface of the film-covered interdigital electrode structure; a few of poly-N-methylpyrrole materials in the poly-N-methylpyrrole thin film pass through slits of the reduced graphene oxide thin film and then are in contact with the interdigital electrode, and most poly-N-methylpyrrole materials are deposited on the surface of the reduced graphene oxide thin film. With poly-N-methylpyrrole serving as a gas adsorption selection layer and with reduced graphene oxide serving as a gas sensitive material to test nitrogen dioxide gas molecules, the selectivity on nitrogen dioxide gas is improved, and nitrogen dioxide in mixed gas can be detected. The nitrogen dioxide gas sensor is simple in structure, easy to prepare, low in production cost, convenient for experiment operation and suitable for nitrogen dioxide gas detection.

A method and apparatus for recovering components from a hydrocarbon feedstock is provided. The method includes the steps of (a) supplying a hydrocarbon feedstock to an oxidation reactor, wherein the hydrocarbon feedstock is oxidized in the presence of a catalyst under conditions sufficient to selectively oxidize sulfur compounds and nitrogen compounds present in the hydrocarbon feedstock; (b) separating the hydrocarbons, the oxidized sulfur compounds, and the oxidized nitrogen compounds by solvent extraction; (c) collecting a residue stream that includes the oxidized sulfur compounds and the oxidized nitrogen compounds; and (d) supplying the residue stream to a fluid catalytic cracking unit.

The invention relates to a formula and preparation technology of a granular non-noble-metal efficient integrated air purification composite material, and belongs to the technical field of adsorption catalysis and air pollution treatment. The composite material is characterized by taking zeolite, meerschaum, a porous active carbon material, iolite or a self-made carrier as a catalyst carrier, taking one or several non-noble-metal oxides as an active component and a nitrogen-containing organic auxiliary agent, and being prepared through an immersion method. The catalyst has a column granular shape, and has the capacity of the non-noble-metal oxides being 12-15 wt% and the content of the nitrogen-containing organic auxiliary agent being 2.0-4.0 wt%. The material can effectively adsorb and purify formaldehyde, TVOC, benzene, toluene, xylene, ozone, sulfur dioxide, nitrogen dioxide, hydrogen sulfide and ammonia gas in air in an integrated manner at normal temperature and humidity, and the overall purification rate is no less than 95%. The material is suitable for places, such as offices, office buildings, living rooms, shopping malls, hospitals and hotels, for integrated air purification.

The invention belongs to the measurement technical field of atmosphere environment quality, which specifically relates to an online automatic measuring system for environment air quality based on low-temperature condensing method sampling. The system is composed of a low-temperature condensing sampling system and an analyzing system; the low-temperature condensing sampling system comprises a drying pipe, an electronic cold trap and a low-temperature low trap that are connected in turn; the drying pipe is connected with an air inlet pipeline for removing vapor and condensing the environment air sample at low temperature; the analyzing system comprises a light source, a sampling battery, an optical spectrum instrument and a computer; the analyzing system splits and detects the air condensed by the sampling system through the optical spectrum instrument by the ultraviolet function from the light source and then analyzes the air by the computer. The system is high in integrated degree and measuring efficiency, which is suitable for continuous, real-time and online measurement of various pollutants of atmosphere environment (including sulfur dioxide, nitrogen dioxide, ozone, ammonia, formaldehyde and part of benzene series) in environment air.

The present invention is related to a nano-structured composite material and process of making for air detoxing and deodoring in enclosed spaces to prevent harmful chemicals in the air from damaging human health. The nano-structured composite material consists of nano-porous carbon, zeolites with sub nano-size pores and at least 1 other component chosen from nano-porous rare earth oxides and nano-sized catalysts, and is made into highly efficient configurations with high geometric surface and low resistance air flow channels. The synergetic action of those nano-structured components can effectively remove toxic chemicals including, but not limited to formaldehyde, benzene, toluene, xylene, propene, butadiene, acetone, carbon monoxide, nitric oxide, nitrogen dioxide, sulfur dioxide, hydrogen sulfide, ammonia, alcohols, chlorine, mercaptans, as well as bad odors, such cigarette smoke and bathroom / toilet smells.

A multi-functional cabin air filter includes a dust collecting filter layer for collecting fine dust; an oxidation catalyst filter layer for oxidizing nitrogen monoxide into nitrogen dioxide; and an adsorption filter layer for adsorbing nitrogen dioxide and volatile organic compounds, wherein antimicrobial nanoparticles are applied to at least one of the dust collecting filter layer, the oxidation catalyst filter layer and the adsorption filter layer. This cabin air filter has dust collecting, denitrifying, deodorizing and antimicrobial functions, and it may be utilized in various ways for air purification in a limited space such as a vehicle.

The invention discloses an oxidation denitration method for ozone containing HCl industrial exhaust gas, belonging to the field of environmental protection technique. The method of the invention is characterized in that ozone O3 is injected into an oxidation absorption tower where the exhaust gas with the temperature range of 40 to 200 DEG C contains the HCl, so as to oxidize nitrogen compounds such as NO, NO2, etc. in the exhaust gas as high valence nitrogen oxides NO2, N2O3, N2O5, etc. which are easy to be dissolved in water, then a complete denitration disposal process is formed by combining with a wet-method absorption technique. The oxidation denitration method has the advantages of higher denitration efficiency, saving investment, low running expense, no secondary pollution, respectively obtaining by-products to recover the resource, and improving the denitration efficiency by more than 90 percent. The oxidation denitration method can be widely applied to the denitration disposal of the exhaust gas containing various contaminations such as HCI, etc., and is especially suitable for the denitration disposal of the industrial exhaust gases containing contaminations which can lead catalyst in SCR technique to be deactivated.

A nitrogen-oxide gas sensor that is able to measure a nitric oxide and a nitrogen dioxide at the same time, and ensure sensing accuracy and stability over a long period of time.The nitrogen-oxide gas sensor includes: a first oxygen ion conductive solid electrolyte; a first film contacting the first oxygen ion conductive solid electrolyte and formed of a metal oxide; a second film contacting the first oxygen ion conductive solid electrolyte and formed of a metal oxide; a power supply source for applying a current to the first and second films by electrically connecting a first node to the first film and a second node to the second film; a measurement unit for measuring an electric potential difference between the first and second nodes; and a temperature adjustment unit for uniformly maintaining a temperature of at least one of the first and second films.

The invention discloses a composite catalyst for catalytically oxidizing nitrogen oxide and a preparation method of the composite catalyst. The composite catalyst is prepared by adopting zirconium oxide as a catalyst carrier, and loading active components and assistants on the catalyst carrier, wherein the active components are oxides of transition metals; and the assistants are oxides of rare-earth metals. The composite catalyst is prepared by the equivoluminal impregnation method. The composite catalyst, disclosed by the invention, can reach 84% NO oxidation rate at the catalytic reaction temperature of 300 DEG C. Generated NO2 can be integrally absorbed and removed with the SO2 in the smoke under the downstream smoke wet desulphurization. The oxidization-absorption method of the nitrogen oxide brings no secondary pollution and is economic and effective, and can be applied to removal of nitrogen oxide in the boiler gas and desulfurization and denitrification integrated technology.

The invention discloses a method and a device for simultaneous reduction and oxidation of nitrogen oxides from airflow. According to a treating process, the treated airflow is guided into a gas-solid reaction tower, solid ferrous chloride, ferric chloride, manganese chloride or magnesium chloride metal chloride particles are guided into the gas-solid reaction tower simultaneously, and the metal chloride is decomposed at the high temperature and reacts with nitric oxide in the airflow, so that part of nitric oxide contained in the airflow is reduced to nitrogen, the rest nitric oxide is oxidized into nitrogen dioxide, generated nitrogen dioxide reacts with an alkaline absorbent easily to be removed, and the purpose of gas purification is achieved. The invention further discloses the special device. The method and the device have the characteristics of low investment cost as well as operation and application cost, simplicity in operation, high treatment efficiency and high treatment capacity.

A joint production method of dilute nitric acid and concentrated nitric acid comprises the following steps: superazeotropic nitric acid with the mass concentration greater than 68.4% is produced by a dual-pressure dilute nitric acid production device, then concentrated nitric acid with the mass concentration greater than 98% is produced by a superazeotropic nitric acid distillation and rectification technology, and dilute nitric acid with the mass concentration greater than 60% is produced at the same time by matching. According to the production method, ammonia and air are employed to produce concentrated nitric acid, ammonia is oxidized at medium pressure, nitrogen oxides are absorbed at high pressure, the content of NOx in the exhaust gas after absorption is less than and equal to 30ppm after ammonia reduction reaction, the problem of environmental pollution is solved, and dilute nitric acid and concentrated nitric acid in any proportion and any concentration can be simultaneously produced without pure oxygen and any other dehydrating agent.

The invention provides a preparing method of a carbon-loaded monoatomic metal nitrogen-containing compound oxygen reduction catalyst. The method comprises the steps of pre-oxidizing nitrogen-containing biomass at a first high temperature, after a pre-oxidized product is uniformly mixed with a transition metal source and a pore-forming agent, conducting first calcination at a second high temperature in an inert gas atmosphere, after a calcined product is subjected to acid pickling, washing and drying, conducting second calcination again at the second high temperature, and finally, obtaining thecarbon-loaded monoatomic metal nitrogen-containing compound oxygen reduction catalyst. The preparing method has the advantages of being low in raw material cost, simple in preparing technology and the like; the prepared catalyst has the advantages of being high in pH universality, atom utilization rate, catalytic performance and stability, excellent in methyl alcohol resistance and the like, is expected to replace expensive carbon-loaded platinum catalysts, and is about to have a wide application prospect in efficient and cheap large-scale commercialized fuel cells.

The invention relates to a synthesis method for catalytic oxygen oxidation of glyoxal aqueous solution to glyoxalic acid aqueous solution with nitrogen oxide, which belongs to the field of the chemical synthesis technology. The catalyst used in the method is exhausted nitrogen oxide gas in industrial production, the oxidizer is cheap industrial oxygen, and the product need only be cooled and crystallized for removing oxalic acid.

The invention relates to a device and a process for processing nitrogen-oxide waste gas containing acidic gas, which belong to the technical field of environmental protection. The device uses an alkali-liquid preparing and distributing system for distributing prepared alkali liquid into a dust-removal alkali-liquid circulation absorbing system, a first-stage alkali-liquid circulation absorbing system and a second-stage alkali-liquid circulation absorbing system, the alkali-liquid circulation in the systems use the closed-loop alkali-liquid path showering from top to bottom, the alkali liquid can be sent into a waste alkali-liquid recovery processing system, and the open-loop air path processing waste gas from bottom to top is used for processing waste gas. The process for processing nitrogen-oxide waste gas containing acidic gas is as follows: the processed waste gas respectively enters from the lower parts and exits from the upper parts of a dust-removal alkali-liquid absorbing tower, a first-stage alkali absorbing tower and a second-stage alkali absorbing tower, and the alkali liquid is showered from top to bottom. Ozone in an ozone reactor is used for oxidizing nitrogen oxide in the waste gas into nitrogen dioxide, and the processed waste gas is discharged from the discharge port of the upper part of the second-stage alkali absorbing tower. The device has simple waste gas processing technology, convenient installation, easy operation, mild reaction condition, high efficiency for removing nitrogen oxides and high automatic degree.

There is a harmful organism that cannot be controlled or is difficult to be controlled with the use of a single agent of a compound represented by the general formula (1) according to the invention, an insecticide, a miticide or a fungicide. Accordingly, an object of the invention is to provide a composition for preventing harmful organisms for efficiently controlling such a harmful organism.That is, the invention is directed to a composition for preventing harmful organisms, characterized by comprising the compound represented by the general formula (1) and other insecticides, miticides or fungicides as active ingredients,wherein, in the formula, A1, A2, A3 and A4 independently represent a carbon atom, a nitrogen atom or an oxidized nitrogen atom, G1 and G2 independently represent an oxygen atom or a sulfur atom; R1 and R2 independently represent a hydrogen atom or a C1 to C4 alkyl group; Xs may be the same or different and represent a hydrogen atom, a halogen atom or a trifluoromethyl group; Q1 represents a substituent such as a phenyl group or a heterocyclic group; and Q2 represents a substituent such as a phenyl group or a heterocyclic group.)

The present invention provides one process of eliminating air pollutant, such as sulfur oxide, nitrogen oxide, mercury vapor and fine dust, from industrial fume. The process is based on one kind of microporous adsorbent-fluoride polymer composite material, which converts the sulfur oxide into acid solution and excludes the acid solution to its outer surface and needs no complicated regeneration. Inside the adsorbent chamber with the modularized composite material, sulfur oxide is converted into high concentration sulfuric acid and thus eliminated from the fume. The composite material adsorbs the mercury vapor inside it via chemical adsorption and eliminates fine dust via surface filtering. The converted sulfuric acid and the fine dust on the surface of the composite material drops into one acid collector.

The invention relates to a method for treating a glyphosate mother solution by using an oxidization method, comprising the following steps of: regulating the PH value of the glyphosate mother solution containing organophosphorus or glyphosate or the glyphosate mother solution containing nitrogen-containing compounds or salts to 0.1-14, slowly dropwise adding hydrogen peroxide, raising temperature and then introducing strong-oxidization gas, wherein the reaction temperature is 0-100 DEG C, and the molar ratio of the added hydrogen peroxide to the strong-oxidization gas is 1:0.1-20; and carrying out oxidization reaction at normal pressure or under the condition of pressurization, oxidizing nitrogen-containing impurities, such as glyphosate, glyphosine, phosphorous acid, methyl glyphosate, aminomethyl phosphoric acid, N-(phosphonomethyl) iminodiacetic acid and the like, into phosphate radical irons, oxidizing nitrogen-containing organic impurities, such as glycine, triethyl ammonia, diethanol amine, aminomethyl phosphoric acid, ethoxyl glycine and the like, into ammonium radical ions, and then concentrating and separating to obtain a phosphate and amine salt inorganic compound for recycling. The invention can effectively oxidize the complex organophosphorus and the nitrogen-containing compounds in the glyphosate mother solution into a single phosphate radical and amine salt inorganic compound for convenient separation and recycling and simultaneously reduces the environmental pollution and the soil hardening of the mother solution; the total conversion rate of phosphorus-containing compounds reaches 60%-90%, the conversion rate of the nitrogen-containing compounds reaches above 90%, and the removing rate of the glyphosate reaches 95%-99% so that a great deal of generated phosphate and amine salt can be used for agricultural fertilizers, thereby achieving the purpose of turning wastes into valuable.

The method of eliminating nitrogen oxide from gas flow is to lead the gas flow into an absorption tower, where the NO2 in the gas flow is absorbed directly by the absorbing liquid, the NO is oxidized by the chlorine the electrically catalytic oxidizing reactor into NO2 absorbed by the absorbing liquid and nitrite ion in the absorbed product is further oxidized into chemically stable nitrate ion, so as to reach gas purification and avoid secondary pollution. The gaseous oxidant and liquid oxidant are regenerated through an electrolysis process, and the absorbed liquid is returned with the circulating pump to the absorbing tower for reuse. The method has high absorption efficiency, no need of throwing oxidant and greatly lowered running cost. The present invention also discloses corresponding apparatus.

An apparatus for purifying exhaust gas may include a CPF device primarily oxidizing hydrocarbon and carbon monoxide in the exhaust gas by using a first DOC, and trapping and regenerating particulate material (PM), a DOC device mounted downstream of the CPF device, secondarily oxidizing the HC and the CO in the primarily oxidized exhaust gas by using a second DOC, and oxidizing nitrogen monoxide into nitrogen dioxide by using the second DOC, a nozzle mounted downstream of the DOC device, and dosing a reducing agent to the exhaust gas secondarily oxidized by the DOC device, and a selective catalytic reduction device mounted downstream of the nozzle, and reducing nitrogen oxide in the exhaust gas into nitrogen gas) by using the NO2 generated in the DOC device and the reducing agent.

This invention relates to a method for generating peroxides in petroleum streams and extracting oxidized sulfur and nitrogen compounds. Peroxides are generated in-situ by combining the petroleum stream with a high neutralization number (HNN) crude and adding an oxygen-containing stream. Alternatively, the oxidation of sulfur and nitrogen compounds may be accomplished by adding peroxides in the presence of oil soluble metal catalysts. The peroxides oxidize nitrogen and sulfur compounds in the petroleum stream to more polar compounds which are solvent extracted.

An exhaust gas purifying system includes an exhaust passage, an oxidation catalyst, a selective catalytic reduction catalyst, a urea water supply device, a first heating mechanism and a controller. The exhaust gas discharged from an internal combustion engine flows through the exhaust passage. The oxidation catalyst for oxidizing nitrogen monoxide contained in the exhaust gas to nitrogen dioxide is disposed in the exhaust passage. The selective catalytic reduction catalyst is disposed downstream of the oxidation catalyst. The urea water supply device supplies urea water into the exhaust passage at the upstream of the selective catalytic reduction catalyst. The first heating mechanism heats the oxidation catalyst. The controller controls the first heating mechanism to adjust the temperature of the oxidation catalyst such that molar ratio between nitrogen monoxide and nitrogen dioxide in the exhaust gas flowing into the selective catalytic reduction catalyst become one to one.

This invention relates to a method for upgrading petroleum streams which have been treated with peroxide, extracted to remove oxidized sulfur and nitrogen compounds, dewaxed and hydrofinished. More particularly, peroxides are generated in-situ by combining the petroleum stream with a high neutralization number (HNN) crude and adding an oxygen-containing stream. Alternatively, the oxidation of sulfur and nitrogen compounds may be accomplished by adding peroxides in the presence of oil soluble metal catalysts. The peroxides oxidize nitrogen and sulfur compounds in the petroleum stream to more polar compounds which are solvent extracted.