44 results about "M-toluidine" patented technology

The invention relates to 100# lead-free aviation gasoline and a preparation method thereof. The 100# lead-free aviation gasoline comprises, by volume, 10-18% of industrial isopentane, 1-11% of light alkylated oil, 45-55% of industrial isooctane, 15-22% of toluene, 0-4% of m-xylene, 5-11% of cumene, 1.5-5.5% of aniline, 0.5-3.5% of N-methyl aniline and 0-3% of m-toluidine. The components are blended to form the finished product. Compared with the prior art, the 100# lead-free aviation gasoline does not contain lead and solves the problem of lead pollution of aviation gasoline. Through the optimized combination of the components, the 100# lead-free aviation gasoline quality is high and the 100# lead-free aviation gasoline satisfies the quality index requirements. The 100# lead-free aviation gasoline has a high economic value. The 100# lead-free aviation gasoline blending process is simple and is conducive to industrial production.

The invention belongs to the technical field of chemical waste water processing, and more specially relates to a method used for catalytic degradation of arylamine waste water using a photocatalysis material. According to the method, apatite is taken as a carrier, a nitrate hexahydrate, zinc nitrate hexahydrate, and sodium tungstate dehydrate are taken as raw materials, hydro-thermal reaction is adopted to prepare the nickel salt modified zinc tungstate photocatalysis material. The preparation method is simple; the obtained photocatalysis material is capable of degrading arylamines such as phenylamine, parachloroaniline, or m-toluidine, and the degradation rate of phenylamine is as high as 98.6%.

An accelerator mixture for peroxide hardeners, in particular an accelerator mixture for an organic peroxide-curing resin mixture, a two-component mortar system containing the same for chemical fastening and use of the same for chemical fastening of anchoring elements in boreholes are disclosed. Using a mixture of bis-N-substituted p-toluidines with bis-N-substituted anilines or bis-N-substituted m-toluidines, it is possible to provide a mortar composition for chemical fastening of anchoring elements in boreholes, which will have an improved low-temperature curing and improved load ratings at high temperatures with an extended gel time.

The invention discloses a process for preparing m-cresol by a nitrogen oxide gas, which comprises the following steps: infusing the nitrogen oxide gas in m-toluidine sulfate for carrying out diazotization, hydrolyzing in the presence of an organic solvent and under an acidic condition, carrying out flash evaporation on the acid phase under the condition of negative pressure, returning the acid phase to a salifying step, dehydrogenating and rectifying the organic phase to obtain m-cresol products. The invention uses the nitrogen oxide gas as a diazotizing agent and inorganic salts do not existin a waste acid so that the waste acid is possibly used industrially. The hydrolysis is carried out in the presence of the organic solvent, the m-toluidine generated by the hydrolysis is quickly dissolved in the organic phase, the side product tarry matters generated in the reaction is few, the yield of the m-toluidine is improved, the salt-free waste acid is subjected to the flash evaporation under the negative pressure at a certain temperature, organic matters are stripped while the reaction water is removed, sulfuric acid is used, the dosage of the sulfuric acid is reduced, the purity of the m-toluidine products prepared by the process of the invention is 99.7% and the yield is more than 90%.

The invention relates to a method for continuously preparing m-cresol. The m-toluidine diazonium salt is continuously added to dilute sulfuric acid of 25 to 64 wt%, and the concentration of sulfuric acid in the reactor is controlled at 25 to 64 wt%, and the reaction temperature is 106 ~150°C to obtain m-cresol. The invention has the following advantages: not only the production cost is low, but also the finished product yield of m-cresol with a content ≥ 99.5% is above 84%, which is about 10% higher than that of the discontinuous preparation method. The reaction volume is small, and the volume of the hydrolysis reactor is only 2 / 5 of the intermittent production, which not only reduces investment, but also saves energy consumption and reduces operating costs. The invention can be carried out without solvent, saves the trouble of separating and recovering the solvent, and greatly reduces material consumption. The waste sulfuric acid produced by the hydrolysis reaction can be recycled as a raw material for the preparation of m-toluidine diazonium salt after being treated by the macroporous adsorption resin, which solves the problem of a large amount of waste acid discharge in the intermittent hydrolysis reaction.