43 results about "Nitropropane" patented technology

Provided is a process for the formation of 2-nitropropane and/or 2,2-dinitropropane by the nitration of propane with dilute nitric acid.

The invention discloses preparation of substituted saturated hydrocarbon and particularly relates to a synthesizing method of 2-nitropropane. The 2-nitropropane is prepared by oxidizing isohydrazone. The synthesizing method includes the steps of S1, condensing acetone, water and ammonia in the presence of a catalyst to generate ketimine, wherein the mass ratio of the acetone to the water is 1:(1-5), and the use amount of the catalyst is 5-11% of the use amount of the acetone; S2, oxidizing the ketimine obtained in the step S1 to form the isohydrazone, wherein reaction system temperature is 30-60 DEG C and heat-preservation reaction time is 0.5-3 hours; S3, oxidizing the isohydrazone obtained in the step S2 to form the 2-nitropropane, wherein reaction system temperature is 50-80 DEG C and heat-preservation reaction time is 0.5-3 hours; rectifying obtained primary reaction liquid to obtain qualified 2-nitropropane products. The synthesizing method has the advantages that the acetone, the ammonia and the water are used as the initial raw materials, and the method is mild in catalytic oxidizing reaction condition, simple in process, convenient to operate, suitable for large-batch 2-nitropropane production, simple in post-processing and high in product purity and does not coproduce acetone oxime or acetone azine.

The invention discloses a visible light photocatalyst containing amorphous MgAl2O4 and a preparation method thereof. The visible light photocatalyst containing amorphous MgAl2O4 comprises 15 to 98 wt% of crystal MgAl2O4 and 2 to 85 wt% of amorphous MgAl2O4. The preparation method comprises the following steps: 1, treating urea as a fuel A and selecting one of glycine, methyl carbamate, 1-nitropropane, DL-alanine, L-alanine and beta-alanine as a fuel B; mixing magnesium nitrate, aluminium nitrate, the fuel A and the fuel B according to a molar ratio of 1:2:(1 to 8):(1 to 15), and fusing to a liquid through heating on an electric furnace; 2, forming a solid through carrying out complete combustion on the liquid by continuing heating; and 3, cooling the solid formed in step 2 to room temperature and grinding. So the visible light photocatalyst containing amorphous MgAl2O4 is obtained. The preparation method has the advantages of simple operation, short time and low cost, and is suitable for industrial large-scale production.

The invention relates to a safe method for preparing nitropropane by vapor-phase nitration, which comprises the following steps: carrying out reaction in a single-channel reactor, wherein after the reaction material propane enters a preheating pipe via a flowmeter and is mixed with pumped nitric acid in a mixing pipe, the mixed materials are sent into a reaction pipe, and the mol ratio of the propane to the nitric acid is controlled at (1-8):1; the mixed materials are subjected to nitration reaction by mass transfer and heat transfer in the reaction pipe, and the products enter a separator; and the reaction products stand in the separator until the reaction products stratify, the organic phase is separated from the water phase, and the organic phase is washed and dried to obtain the product. By using the invention, the propane and the nitric acid can be directly synthesized into various nitroparaffins under the condition of no catalyst, and the process is safe and continuous. The masstransfer and heat transfer are completed in the single channel without additional heat dissipation, thereby reducing the power consumption. The invention has the advantage of simple structure and is easy to operate. The conversion rate of the propane is higher than 20%, and the selectivity of the nitropropane is higher than 80%.

The invention relates to a method for preparing 2-nitro-2-methyl-1-propanol. The method comprises the following steps: (1) dissolving an alkali in an alcohol solvent to obtain a solution and dissolving paraformaldehyde in the solution to obtain a dissolving solution, wherein the mass ratio of alcohol to alkali to paraformaldehyde is equal to 1: (0.005-0.05): (0.2-2); (2) adding the dissolving solution into 2-nitropropane for reacting, after the reaction is completed, neutralizing with an acid and then filtering to obtain a filtrate, wherein the molar ratio of 2-nitropropane to paraformaldehyde in the step (1) is equal to 1: (0.5-2); and (3) distilling the filtrate under reduced pressure to obtain 2-nitro-2-methyl-1-propanol crystals. The method is simple in process and is easily operated, and the yield of the product is high. Since alcohol is used as a solvent, the energy consumption during the concentration is reduced and the industrial continuous production is easily achieved.

The invention discloses PU matte color repairing golden oil and a preparation process thereof. The process comprises the following steps: feeding styrene modified alkyd resin and cyclohexanone into a dispersion cylinder, switching on a stirring device switch, regulating the rotating speed to be 1,000 revolutions per minute, and continuously performing stirring for 5 to 8 minutes; feeding matting powder, increasing the stirring rotating speed to be 1,500 revolutions per minute, and continuously performing stirring for 15 minutes; feeding nitrocotton, nitropropane and absolute ethyl alcohol, lowering the stirring rotating speed to be 1,000 revolutions per minute, and continuously performing stirring for 8 to 10 minutes; feeding polyamide wax, a leveling agent, an antifoaming agent and butyl acrylate, lowering the rotating speed to be 800 revolutions per minute, and continuously performing stirring for 5 minutes; discharging the product after dispersion is determined to be completed. According to the PU matte color repairing golden oil and the preparation process thereof, the performance such as leveling performance, cracking resistance and floating resistance is improved to a certain extent compared with that of a similar product; moreover, the PU matte color repairing golden oil is more environment-friendly, and has higher stability.

The invention relates to high-cleanness liquid boiler fuel. The fuel is prepared by blending following raw materials by volume: 60-80% of polymethoxymethylal, 13-29.5% of heavy naphtha, 5-10% of fatty acid methyl ester and 0.5-2% of an additive. The additive includes, by mass, 10-20% of alkylphenol barium, 10-20% of 2,6-bis(1,1-dimethylethyl)-4-methylphenol, 50-75% of nitropropane, 2.5-5% of ethylene glycol monophenyl ether, 1.25-2.5% of trimethyl borate and 1.25-2.5% of N,N'-bis(salicylidene)-1,2-propanediamine. The calorific value of the fuel is substantially equivalent to the calorific value of Chinese national standard 0# diesel oil, consumption amounts of the fuel and the diesel oil are at the same level, but SO2 in combustion emission of the fuel is reduced by about 60% than that of the diesel oil, NOx in combustion emission of the fuel is reduced by 30% or above than that of the diesel oil, and particles in combustion emission of the fuel are reduced by about 50% or above than those of diesel oil, and therefore cleanness of the fuel is significantly improved.

The present invention relates to the application of environmental microbe. Especially, by means of molecular technology, one new gene is cloned from Streptomyces ansochromogenes 7100 and the gene encodes one kind of 2-streptomycete dioxyenase. The encoded product has great value in biologically degrading industrial pollutant nitroalkane and in improving environment.

The invention discloses a preparation method of pore-tendering and astringent water. The preparation method comprises the following steps of taking 90-110 parts of water, 1-10 parts of butanediol, 0.1-2 part of carbomer, 0.1-2 part of aminomethyl propanol, 0.1-1 part of a trichosanthes kirilowii maxim extract, 0.1-1 part of a cherokee rose fruit extract, 0.1-1 part of a pomelo fruit extract, 0.1-1part of a persimmon fruit extract, 1-5 parts of butanediol, 0.1-1 part of a hamamelis virginiana extract, 0.1-1 part of sodium hyaluronate, 0.1-1 part of ginkgo leaf extract, 0.1-1 part of moso bamboo leaf extract, 0.1-1 part of capryloyl hydroxamic acid, 0.1-1 part of 2-bromine 2-nitropropane-1,3-diol and 0.1-1 part of butanediol to prepare the astringent water. The fructus trichosanthis extract, the black cherry fruit extract, the pomelo fruit extract and the persimmon fruit extract are added into the astringent water, so that the astringent water has a lasting skin tendering effect duringuse, anthocyanin and procyanidine which are high in oxygen free radical absorption capacity and oxidation resistance are contained in the additive, so that the skin aging speed is reduced, and the skin of people can be continuously beautified.

The invention relates to the field of chemical materials, and particularly discloses a preparation method of a durable and stable titanium silicalite molecular sieve catalyst for producing 2-nitropropane. The durable and stable titanium silicalite molecular sieve catalyst is prepared by the following steps: S1, taking wood pulp as a raw material, carrying out acidolysis modification and dissolving treatment to prepare a cellulose solution; S2, dropwise adding the cellulose solution serving as a main raw material into regenerated liquid to prepare a cellulose microsphere template; S3, calcining the cellulose solution to obtain a matrix carbon aerogel template; S4, preparing a catalyst material by using the cellulose microsphere template and the matrix carbon aerogel template; and S5, respectively removing the cellulose microsphere template and the matrix carbon aerogel template to prepare the durable and stable titanium silicalite molecular sieve catalyst for producing 2-nitropropane. According to the durable and stable titanium silicalite molecular sieve catalyst, the catalyst deactivation phenomenon caused by pore channel blockage is improved, the service life of the catalyst is prolonged, and the durability of a catalyst material is improved.

The invention provides a nonmetal gasoline antiknock agent and a preparation method thereof. The nonmetal gasoline antiknock agent comprises the following raw materials in parts by weight: 30-80 parts of N-methyl formamide, 2-8 parts of methyl tertiary butyl ether, 2-15 parts of 1-nitropropane, 5-20 parts of glycerol tripalmitate, 3-18 parts of nonyl phenol polyoxyethylene ether and 2-8 parts of a cosolvent. The cosolvent is methyl ethyl ketone, 2-naphthyl amine and 1,5-dimethyl hexyl amine. According to the nonmetal gasoline antiknock agent disclosed by the invention, the raw materials are scientifically compounded, have better compatibility and synergistically play a role, so that the purpose of improving the antiknock property of gasoline is achieved, sufficient combustion of gasoline is promoted, combustion carbon deposit in a cylinder is effectively eliminated, the combustion efficiency of gasoline is improved, and the requirements of refinery enterprises for blending international gasoline by using naphtha are met; and objective economic benefits can be created for enterprises.

The invention relates to an anthracene compound, and in particular, relates to a synthesis method of 9,10-anthracenedicarboxylic acid, wherein the synthesis method comprises the steps: dissolving anthracene in a hydrogen bromide solution and an acetic acid solution, then adding trioxymethylene and N,N,N-trimethyl-1-tetradecyl ammonium bromide, and reacting under the protection of N2 to obtain a first intermediate; then dissolving the first intermediate in dimethyl sulfoxide, dropwise adding a mixed solution of a sodium ethoxide solution and 2-nitropropane, filtering, and performing chromatographic separation to obtain a second intermediate; and adding a mixed solvent, sulfamic acid and sodium chlorite into the second intermediate to react, adding an ammonium chloride solution after the reaction is finished, and then extracting, drying and filtering to obtain a 9,10-anthracenedicarboxylic acid solid. The method can accurately position the ninth and tenth positions of anthracene, and has the advantages of strong positioning effect, few reaction byproducts, easy separation of target products, and high yield.