4 results about "Diphenic acid" patented technology

The invention belongs to the technical field of fine chemical engineering, and discloses a method for preparing 2, 3, 4-trimethyl-1, 3-dihydrophenanthrene through continuous oxidation of 9, 10- The invention discloses a method for preparing 9, 10-phenanthrenequinone, which is characterized in that 9, 10-dihydrophenanthrene is used as a raw material, t-BHP is used as an oxidant, under the action of a catalyst, a mild oxidation reaction is carried out at 60 DEG C and normal pressure to prepare 9, 10-phenanthrenequinone, the conversion rate of the dihydrophenanthrene is 99%, the yield of the 9, 10-phenanthrenequinone is 77%, H2O2 is added into an acetic acid solvent to oxidize the 9, 10-phenanthrenequinone, the conversion rate of the 9, 10-phenanthrenequinone is 99%, and the yield of the 2, 2 '-diphenyldicarboxylic acid is 96%. According to the method, the traditional process for producing 2, 2 '-diphenyldicarboxylic acid is replaced by a process for producing 2, 2'-diphenyldicarboxylic acid through continuous oxidation by taking 9, 10-dihydrophenanthrene as a raw material and an oxidizing agent, no strong alkaline substance is used, the cost is low, the condition is mild, the operation is easy, and meanwhile, the conversion rate of 9, 10-dihydrophenanthrene and the yield of 2, 2 '-diphenyldicarboxylic acid are high.

The invention discloses a 9H-xanthene-9-ketone compound as well as a preparation method and application thereof, and relates to the technical field of biological medicines. Comprising the following steps: by taking o-fluorobenzoic acid and resorcinol as raw materials, carrying out acylation reaction in a trifluoromethanesulfonic acid solvent system to obtain an intermediate I, and then carrying out cyclization reaction on the intermediate I and inorganic strong base in water to obtain a 9H-xanthene-9-ketone compound crude product. O-fluorobenzoic acid and isophthalic acid are used as raw materials for two-step reaction, the first step is mild acylation reaction, the second step adopts water as a green solvent, and the 9H-xanthene-9-ketone compound is successfully synthesized through cyclization of inorganic strong base with relatively lower cost, and kilogram-level production can be realized. The method is mild in reaction condition, low in cost and simple in post-treatment process, and the obtained 9H-xanthene-9-ketone compound is high in purity and has excellent application value.

The application provides a fluorescent metal organic framework material, a preparation method thereof and a detection method of magnetic substance content in a secondary battery negative electrode material, and belongs to the technical field of metal organic framework materials. The chemical formula of the fluorescent metal organic framework material is Ln2L3xH2O, wherein the inorganic metal center Ln is at least one of lanthanide metals, the organic ligand L has a diphenic acid structure, and x is 0-3. The fluorescent metal organic framework material has specific response to Fe 3+ and Cr 3+ magnetic substances, and exhibits the characteristics of rapidness, high selectivity and high sensitivity, and can detect the magnetic substances through an ultraviolet fluorescence (UV-vis) method.

The present application relates to the field of catalyst, especially to a MOFs catalyst and its preparation method and application.The method comprises: taking an aluminum-based MOF as a carrier, loading noble metal through an impregnation reduction method, and then performing gas phase reduction; wherein the aluminum-based MOF is synthesized by a hydrothermal method with a precursor and an organic ligand as raw materials, the metal precursor is an aluminum salt or a hydrated aluminum salt, and the organic ligand is selected from one or more of square acid, terephthalic acid, 2-fluoroterephthalic acid, diphenic acid, bipyridine, bipyridine dicarboxylic acid, trimesic acid, pyromellitic acid, and mellitic acid; the noble metal includes a Pd salt.The present application can prepare stable aluminum-based MOFs, obtain a strong interaction catalyst of noble metal and aluminum-based MOFs, the MOFs catalyst has stable properties, excellent performance, good morphology, high activity, and good selectivity for double bonds, and the MOFs catalyst can be recovered by centrifugation and reused multiple times.