4 results about "Dinitroaniline" patented technology

The present disclosure relates to a method for controlling weeds of Rottboellia genus with herbicidal combinations / compositions comprising chloroacetamide herbicides and dinitroaniline herbicide. The present disclosure further provides a method for controlling weeds using the herbicidal combination possessing enhanced efficacy over the individual herbicides.

This invention relates to the field of organic chemical synthesis technology, specifically to a method for preparing 2,4-dinitroaniline. The method comprises: S1, nitrification of benzene in a concentrated sulfuric acid system to obtain a system containing nitrobenzene; S2, dilution of the nitrobenzene-containing system with water, followed by catalytic hydrogenation to convert the nitrobenzene to aniline; after the reaction, the catalyst is filtered off to obtain a system containing aniline; S3, para-nitration of the aniline-containing system with concentrated nitric acid; after the reaction, dehydration of the system, followed by ortho-nitration of the system with concentrated nitric acid; and post-treatment to obtain 2,4-dinitroaniline. This preparation method is green, safe, efficient, simple to operate, low in cost, uses inexpensive raw materials, and yields high purity of the target product, making it more suitable for industrial applications.

This invention relates to the field of catalyst technology, providing a supported ruthenium-based catalyst, its preparation method, and its application. The supported ruthenium-based catalyst provided by this invention comprises a support and an active metal Ru; the active metal Ru is dispersed on the surface of the support in the form of elemental atom clusters and Ru oxide clusters; the elemental Ru atom clusters are dispersed around the Ru oxide clusters; the support is an oxygen-containing support. The supported ruthenium-based catalyst provided by this invention exhibits high hydrogenation selectivity and activity. When applied to the selective hydrogenation reduction reaction of 2,4-dinitroaniline, it can effectively improve the conversion rate of the reactants and the selectivity of the target product, 4-nitro-o-phenylenediamine. The preparation method provided by this invention is simple, easy to operate, and suitable for large-scale production.

The invention discloses a preparation method of 6-fluoro-3-methyl-2, 4-dinitroaniline, which comprises the following steps: reacting 3, 4-difluorotoluene for 6 hours at the high temperature of 160 DEG C by using fuming sulfuric acid and sodium nitrate as nitrating agents, cooling, separating out by using ice water after the temperature is reduced to room temperature, filtering, washing and drying to obtain 1, 2-difluoro-4-methyl-3, 4-dinitroaniline. And 2, 5-dinitrobenzene (qDFDNT). The preparation method comprises the following steps: dissolving 1, 2-difluoro-4-methyl-3, 5-dinitrobenzene in tetrahydrofuran, slowly dropwise adding an ammonia water solution, and naturally volatilizing to obtain the 6-fluoro-3-methyl-2, 4-dinitroaniline (qDFDNTN). The 6-fluoro-3-methyl-2, 4-dinitroaniline prepared by the invention has a proper melting point (128.5 DEG C), a stable compound, a high decomposition temperature (284 DEG C) and impact sensitivity of not less than 40 J; and the friction sensitivity is not lower than 360 N. And the explosive has excellent safety performance and can be used as any component in eutectic fusion casting carrier explosives.