3471 results about "Nitrobenzene" patented technology

The invention relates to a metal/graphite-like carbon nitride (g-C3N4) compound catalyst and a preparing method thereof in the field of catalysis. The chemical constitution of a metal/graphite-like carbon nitride provided by the invention is M/g-C3N4, wherein the metal M is Au, Ag, Pt, Pd, Bi, Cu, Ru or Rh, wherein the content of metal is 0-50% (mass fraction). The metal/graphite-like carbon nitride compound is a catalytic reducing agent at normal pressure and temperature, and the material is suitable for reducing derivants of nitrobenzene.

A process for preparing 2,2-bis-[4-(4-aminophenyloxy)phenyl] propane includes such steps as reflux reacting between 4,4'-dihydroxydiphenyl propane (BPA), 1-chloro-4-nitrobenzene (CNB) and salting agent in the mixture of non-protonic transferring polar solvent and dewatering agent at 110-150 deg.C to obtain 2,2-bis-[4-(4-nitrophenyloxy)phenyl] propane (BNPP), and reducing in alcohol as solvent under action of hexahydrated iron chloride, activated carbon and hydrazine hydrate. Its advantages are simple process, low cost and high quality and output rate of product.

A series of ultrahigh-cross-linked weakly alkaline-anionic exchange resin with both adsorption and exchange functions, which has different specific surface areas and exchange capacities, is prepared from low-cross-linked macroporous polystyrene through chloromethylation, cross-linking reaction, where the nitrobenzene or substituted nitrobenzene is used as solvent and the Lewis acid is used as catalyst, and amination by dimethylamine.

The production process is liquid phase catalytic hydrogenation reaction of nitrobenzene halide, such as o-chloronitrobenzene, p-chloronitrobenzene, 3, 4-dichloronitrobenzene and 3-chloro-4-fluoronitrobenzene, etc. with carbon nanotube carried Pd and Pt as hydrogenation catalyst to produce corresponding haloarylamine. The said production process can inhibit hydrodehalogenation, and has the advantages of high selectivity, high yield and high catalyst stability, etc. and thus high practical value.

The present invention relates to a catalyst for preparing arylamine by utilizing catalytic hydrogenation of nitrobenzene compound and its application method, belonging to the field of catalytic synthesis technology in application chemistry. Said catalyst is formed from carrier and active component, its carrier can be metal oxide; carbon materials of active carbon, carbon nano tube and porous carbon, etc.; micropore molecular sieve with different compositions or silica-base material into which one or several kinds of hetero-atoms are added, also can be organic high-molecular polymer. The active component can be double-component (multicomponent) metal formed from metal silver and gold or silver gold and palladium, platinum and copper, etc. in which the weight percentage of active metal component and carrie.r is 0.5-30%.

The invention relates to a high oil absorption polyurethane foam which comprises the following components in parts by weight: 20 to 40 parts of isocyanate, 35 to 60 parts of polyol, 0.5 to 3 parts of catalyst, 0.5 to 3 parts of foam stabilizer, 5 to 10 parts of foaming agent, 2 to 10 parts of opening agent,5 to 20 parts of flame retardant, 5 to 15 parts of silicon rubber spherical micro powder and 0.5 to 2 parts of coupling agent. The preparation method comprises the following technology steps of weighing, prepolymerization, dispersing, polymerization foaming reaction, curing and peeling at room temperature and cutting. The high oil absorption polyurethane foam can be used for the absorption and recycle of various oil products (crude oil, engine oil, diesel fuel, gasoline, kerosene and the like) on water surfaces, ground or surfaces of other objects, and various oil soluble organic compounds (benzene, methylbenzene, dimethylbenzene, chloroform, nitrobenzene, chlorobenzene and the like). The invention has the advantages of simple technology and low cost, obviously improves the dispersing effect of the silicon rubber spherical micro powder in a polymerization system by using ultrasonic technique, and greatly increase the oil absorption quantity and oil absorption rate of the polyurethane foam by adding the silicon rubber spherical micro powder.

A lubricant composition suitable for fuel injected two-stroke cycle engines includes an oil of lubricating viscosity, an amount, sufficient to reduce or prevent piston scuffing, of a mixture of (A) at least one phenol selected from (A-1) an aminophenol and (A-2) a reaction product of a nitrophenol and an amino compound, and (B) at least one Mannich dispersant, amine dispersant, nitrogen-containing carboxylic dispersant, or ester dispersant. The composition further includes an amount, sufficient to reduce degradation of the lubricant composition upon exposure to oxygen or oxides of nitrogen, of a nitrogen-containing inhibitor, a hindered phenol inhibitor, or a sulfur-containing organic inhibitor.

The invention belongs to the technical field of nitrobenzene class wastewater treatment and in particular relates to a process method for advanced oxidation and degradation of nitrobenzene class wastewater. The invention solves the problem that the prior method for degrading nitrobenzene class wastewater has long time consumption and high cost. The method comprises that: wastewater and ozone undergo full haptoreaction in gas-liquid mass transfer equipment; after the haptoreaction, the wastewater enters a coupling reactor consisting of an ultrasonic wave field and an electrolysis field; and nitrobenzene class substances in the wastewater are degraded under the synergistic action of ultrasonic wave and micro-electrolysis. The device comprises the gas-liquid mass transfer equipment; a gas inlet of the gas-liquid mass transfer equipment is connected with an ozone generator; a liquid inlet of the gas-liquid mass transfer equipment is connected with a nitrobenzene class wastewater pool; a liquid outlet of the gas-liquid mass transfer equipment is connected with the wastewater coupling reactor; and the bottom of the wastewater coupling reactor is provided with an ultrasonic wave generator. The process method has the following advantages: the process method has simple process flow and convenient operation, farthest reduces treatment cost and can be applied to various organic industrial wastewater such as phenol-containing wastewater, detonator wastewater, dye wastewater, wastewater in a petrochemical enterprise, detergent wastewater and the like.

The invention discloses a fluorescent probe for detecting a biologic thiol and a preparation method and a usage method thereof. The fluorescent probe for detecting the biologic thiol consists of two parts: namely, a 2, 4-bi-nitrobenzene sulfonyl group which is a recognizing group and a boron difluoride-dipyrryl methane (BODIPY) derivative which is an information reporting functional group. The molecule of the probe can simply and quickly enter a living cell, generates a specificity reaction with the thiol in the cell, and causes to obviously enhance fluorescence intensity, so that the fluorescent probe further can be used for the fluorescence detection and the imaging of the active thiol in the living cell. The fluorescent probe has good stability, can be stored and used for a long time, is applicable to various environments in which the living cell grows, and has higher detection sensitivity for the thiol, strong anti-interference capability, excellent selectivity and no action on other common biologic interfering molecules. The fluorescent probe can simply enter the living cell and a living tissue; the single recognition of the thiol in a biologic system can be achieved effectively; and therefore, the fluorescent probe can be used for the fluorescence imaging of the living cell.

The invention discloses a phenylamine making device and method hydrogenated by nitrobenzene in the chemical preparing technical domain, which comprises the following parts: fluid bed, gas distributor, gas-liquid double-flow sprayer, catalyst dense-phase area, heat-exchange device and component system, catalytic overflow pipe or inflow pipe, gasifying inlet system, liquid-phased inlet system and on-line regenerative device of catalyst, wherein each device connects entire inlet, reacting and catalyst regenerating reacting device; the catalyst is loaded in the fluid bed, which aerates little nitrogen or air to reduce; the composite gas with nitrobenzene and hydrogen is aerated into the reactor with impurity transmitted into phenylamine material nearly; the catalyst is returned to fluid bed through regenerative device, which guarantees continuous operation.

The produce discloses a kind of pyridyl modified composite functional adsorption resin with very high crosslinking degree and pyridyl radical as functional radical and its preparation process. The preparation process includes polymerization with styrene as monomer, divinyl benzene as cross-linking agent, liquid wax as pore-creating agent, magnesium carbonate as dispersant and benzoyl peroxide as initiator to produce low crosslinking degree macroporous polystyrene; the subsequent cross-liking reaction with swellant of nitrobenzene, etc. and catalyst Lewis acid, etc. to obtain composite functional resin precursor with different crosslinking degree; and final adding alpha-methyl pyridine for reaction to prepare the pyridyl modified composite functional adsorption resin. The resin has both adsorbing and ion exchanging functions, and may find its wide application in medicine separation, food decoloring, water treatment, etc.

The invention provides a Fe3O4-poly-dopamine-Au nano-composite material. Au nano-particles are deposited on the surfaces of Fe3O4 nano-magnetic beads covering poly-dopamine, wherein the diameter of the Au nano-particles is 10-30 nm; the thickness of poly-dopamine is 20-55 nm, and the diameter of Fe3O4 magnetic beads is 200-250 nm. The invention also provides a preparation method of the Fe3O4-poly-dopamine-Au nano-composite material and an application of the Fe3O4-poly-dopamine-Au nano-composite material in detection of catalysis of p-nitrophenol. According to the composite material, because nanogold is distributed on the surface layer of the Fe3O4-poly-dopamine-Au nano-composite material, the catalytic efficiency is improved; in addition, the Fe3O4 magnetic beads have the characteristics of high biocompatibility and environmental protection, and is convenient to synthesize and easy to separate, so that a nanogold catalyst can be repeatedly used.

The invention relates to a combined nitrification method for synthesizing nitrobenzene and a combined device of a micro-reactor and a stirring reactor. During the synthesis, benzene and mixed acid of nitric acid and sulfuric acid are taken as initial materials, are conveyed to two inlets of the micro-reactor through a metering pump respectively, are premixed in micro-channels, and perform partialnitration reaction at the same time; and a first-stage nitration product with high dispersion state is produced at an outlet of the micro-reactor. The first-stage nitration product continuously flowsinto a stirred tank nitration reactor to continue to react. The method and the device perform continuous operation under the condition of the mixed acid with high water content and have safe process,the conversion rate of the benzene is 99.85 percent (mol), and the selectivity of a product, namely the nitrobenzene is 99.8 percent (mol).

The present invention discloses the synthesis of composite functional super high cross-linked adsorbing resin containing sulfo radical. The synthesis process of the present invention adopts styrene as monomer, divinyl benzene as cross-liking agent, liquid paraffin and other material as pore creating agent, magnesium sulfate and other material as dispersant, benzoyl peroxide as initiator, nitrobenzene and dichloro ethane or chloroben as sweller, and zinc chloride, ferric trichloride or tin tetrachloride and Lewis acid as catalyst, and prepares composite functional resin through preparing chloromethylated low cross-linked polystyrene resin, post-crosslinking reaction to obtain composite functional resin precursor of different crosslinking degree and final sulfonating with high concentration sulfuric acid to obtain composite functional resin with different specific surface area and different exchange capacity. The resin product has both adsorption and ion exchange function and thus wide application range.

The invention discloses a super high cross-linking adsorption resin with quaternary amines base composite function and making method, which comprises the following steps: utilizing phenylethene as monomer, diphenyl ethylene as cross linking agent, liquid wax as hole-sealing agent, magnesium carbonate as disperser, benzoyl peroxide as initiator; adopting nitrobenzene, substituted nitrobenzene, dichloroethanes or orthodichlorobenzene as swelling agent in the cross-linking reaction course of chloromethylation low cross-linking large-hole polyphenylacetylene; using zinc chloride, ferric chloride or tin tetrachloride as catalyst to produce different cross linking composite functional resin priority in the preset time and temperature condition; adding trimethylamine to aminate to produce the product. The resin possesses double functions of adsorption and ion exchanging, which can be applied in drug separation, little polluted water source and organic chemical waste water harnessing.

The invention concerns the reaction of benzene catalyst adding hydrogen, specific speaking, it's a kind of catalyst to produce 4-ammonia base-3-F benzene fen and its application. The catalyst is made of carrier, active parts and helping dose. The main active parts are: dear metal Pt, Pd or Rh, whose weight is of catalyst 0.1%--20%. Help doses are IA, ó�A, ó¾B, ó° or Sparse soil chemical element. The catalyst has the feature of high active in reactivation, good choosing ability and many reuses. The catalyst can also be used in other replacing nitric unit benzene adding hydrogen and catalyst process.

The invention discloses a gas distributor and a method for synthesizing aniline in fluidized bed, which belongs to the field of chemical equipment and chemical materials preparing technology. The gas distributor comprises main pipe for transporting gas, branched pipe and ring conduit connected with the same, and nozzle arranged on the ring conduit capable of spraying gas up and down. The invention also discloses a method for vapor hydrogenation preparation of aniline from nitrobenzene by using said equipment, characterized by controlling the quantity of nozzles to adjust the temperature of gas distributor zone for controlling the quality of aniline. The invention can reduce the maximum and average temperature of gas distributor zone, reduce the coking on the catalyst, prolong the using time of catalyst, and improve the purity of aniline.

The invention discloses a method for preparing o-phenylenediamine by catalytic hydrogenation of o-nitrophenylamine. The method is characterized in that: in the hydrogenation reaction of o-nitrophenylamine, alcohol is used as a solvent, nickel is used as a catalyst, reduction reaction is performed for 2 to 10 hours under the hydrogen pressure of 1.0 to 6 MPa at the temperature of between 40 and 80 DEG C, and the reaction product is rectified to form the while o-phenylenediamine. The method has the advantages that the alcohol is used as the solvent in the catalytic hydrogenation for producing o-phenylenediamine, the alcohol can be reclaimed and directly used for next reaction, and the waste residue produced by distillation can be used as an organic fuel, so that the problem that a large amount of waste water containing organic substances is produced in reduction of iron powder or sodium sulfide in the conventional process is solved; and thick acid and thick alkali used in the conventional process are avoided in the hydrogenation process, so that corrosion of equipment is greatly reduced, pollution is reduced, and almost zero pollution is realized. In addition, compared with the conventional iron powder or sodium sulfide reduction, the catalytic hydrogenation process has the advantages of low pollution, high yield, high quality, short production period and low energy consumption.

This invention discloses a method for controlling the oxygen-containing functional groups on the surface of crosslinked polystyrene adsorption resins. The method uses styrene as the monomer, divinylbenzene as the crosslinking agent, liquid wax as the pore-forming agent, magnesium carbonate as the dispersant, and benzoyl peroxide as the initiator. The method comprises: (1) preparing macroporous styrene-divinylbenzene copolymer resins with a low crosslinking degree; (2) chloromethylating to obtain chloromethylated macroporous styrene-divinylbenzene copolymer resin balls; (3) swollening in nitrobenzene, adding the catalyst, introducing nitrogen, oxygen or air, and reacting to obtain crosslinked styrene-divinylbenzene copolymer resins having carbonyl, hydroxyl, ester or carboxyl on the surface. The resins can be used to treat industrial wastewater or extract drugs. The method has such advantages as simple process and simple equipment.

The invention discloses a 4, 5-disubstituted-2-aminothiazole compound. The structural formula is shown in the specification, wherein R1 is 4-tolyl, 4-chlorophenyl, 4-methoxyphenyl, 4-nitrobenzene or propoxy, and R2 is phenyl, 4-tolyl, 4-fluorophenyl, 4-methoxyphenyl, 2-furyl, isopropyl, 4-nitrophenyl or n-propyl. The invention simultaneously provides a preparation method of the 4, 5-disubstituted-2-aminothiazole compound. The preparation method comprises the following steps: enabling an olefin azide type compound and potassium thiocyanate to react at the temperature of 75-85 DEG C in the presence of a solvent and a metal catalyst, concentrating an obtained reaction solution, then extracting with water and ethyl acetate, washing an obtained organic layer, then drying and concentrating by a rotary evaporator; performing silica gel column chromatography on an obtained concentrate to obtain the 4, 5-disubstituted-2-aminothiazole compound.

The invention discloses a transition metal complex based on a semirigid bipyridine bisamide organic ligand and terephthalic acid as well as a synthetic method and application of the transition metal complex. The molecular formula of the transition metal complex is as follows: [Zn(3-bpah)(1,4-BDC)).H2O; [Cd(3-bpah)(1,4-BDC)(H2O)], wherein 3-bpah is N,N'-bi(3-pyridine acylamino)-1 2-cyclohexane. The method comprises the steps of mixing Zb<2+> nitrate or Cd<2+> chloride, the semirigid bipyridine bisamide ligand, terephthalic acid and deionized water, adjusting the pH value of the mixture, pouring the mixture into a high-pressure reaction kettle, performing heat preservation in hydrothermal condition, cooling the mixture to room temperature, and airing the mixture, so as to obtain the target complex. The transition metal complex as well as the synthetic method and application of the transition metal complex have the advantages that the synthetic method is simple, the synthetic yield is high, the synthesized complex has high fluorescence-emission property, fluorescent selectivity to different solvent molecules, and fluorescence identification and detection properties for environmental pollutant nitrobenzene, and can be used as fluorescent material.

The invention relates to a preparation method of linezolid and a preparation thereof, in particular to a preparation method of a linezolid raw material and a freeze-dried powder injection thereof. The preparation method mainly comprises the following steps: (1) synthesizing 2(S)-1-amino-3-chloro-2-propanol hydrochloride; (2) synthesizing (S)-N-[2-acetoxyl-3-chloropropyl] acetamide; (3) synthesizing 3-fluoro-4-morpholinyl nitrobenzene; (4) synthesizing N-carbobenzoxy-3-fluoro-4-morpholinyl aniline; (5) synthesizing the linezolid; and (6) preparing the linezolid preparation. The freeze-dried powder injection of the linezolid for injection, which is prepared by the invention, effectively improves the stability of medicines so that the medicines have longer shelf life, can be transported more conveniently and are more favorable for clinical applications. Moreover, the method of the invention for preparing the raw material linezolid and the freeze-dried powder injection thereof is simple and effective and is suitable for large-scale industrial production.

The invention belongs to the technical field of nitrobenzene wastewater, in particular relates to a method and device for adsorbing, reducing, oxidizing and degrading nitrobenzene wastewater, and solves the problem of the existing method for degrading nitrobenzene wastewater. The method comprises the following steps of performing a reduction reaction on nitrobenzene wastewater in a micro-electrolysis bath; performing a sufficient contact reaction with ozone in gas-liquid reaction equipment; further degrading pollutants in the wastewater in the gas-liquid reaction equipment; and circularly treating the wastewater in the micro-electrolysis bath and the gas-liquid reaction equipment. The device comprises a rotary packed bed device, wherein a gas inlet is connected with an ozone generator; and a liquid inlet and a liquid outlet are connected with the micro-electrolysis bath. The method and the device have the beneficial effects that the process flow is simple and convenient to operate; the advantages of various technologies are given a full play by coupling the three technologies to reach the aim of treating waste by using waste, so that the treatment cost can be furthest reduced.