5 results about "Cuprous salt" patented technology

The invention relates to a cuprous salt antioxidant containing a phosphite structure and a preparation method and application thereof.The preparation method comprises the steps that firstly, diethyl malonate reacts in the presence of ammonia gas to obtain an intermediate A, then the intermediate A and 3-amino-2, 5-di-tert-butylphenol are subjected to condensation cyclization to obtain an intermediate B, finally, after the intermediate B and a phosphite derivative react, the cuprous salt antioxidant containing the phosphite structure is obtained, and the cuprous salt antioxidant containing the phosphite structure is obtained. And coordinating with cuprous salt to obtain a final product. The invention also provides a nylon composition containing the antioxidant. The antioxidant disclosed by the invention has the characteristics of high-efficiency oxidation resistance, hydrolysis resistance and good compatibility with nylon through the synergistic effect of a plurality of intramolecular stable mechanisms, and can be used for remarkably improving the thermal oxidation stability of a nylon material, inhibiting degradation in the processing and using processes and effectively keeping the mechanical properties, appearance and color of the material.

The application discloses a preparation process and application of superfine copper oxide powder, and the preparation process comprises the following steps: (1) mixing cuprous salt and hydrochloric acid to obtain a first solution; (2) atomizing the alkaline solution and the first solution respectively, then simultaneously feeding into a reactor, stirring at a certain temperature, and then separating to obtain a precipitate; and (3) washing, drying, grinding, calcining and cooling the precipitate to obtain the copper oxide powder. The copper oxide powder is generated by the atomization method, has a purity of 99.6%, no agglomeration phenomenon, and uniform particle size distribution.

The invention provides a preparation method of a 2-bromobenzofuran derivative and a precursor of the 2-bromobenzofuran derivative. The preparation method of the 2-bromobenzofuran derivative and the precursor thereof provided by the invention comprises the following steps: S1, converting a compound 1 into a compound 2 in the presence of PPh3 and CBr4; s2, converting the compound 2 into a compound 3 in the presence of an alkali reagent and cuprous salt; s3, in the presence of an ester-based reducing agent, converting the compound 3 into a compound 4; s4, converting the compound 4 into a compound 5 in the presence of a hydroxyl halogenating reagent; s5, converting the compound 5 into a compound 6 in the presence of a cyanation reagent; and S6, in the presence of thionyl chloride and R2OH, converting the compound 6 into a compound 7. The synthetic route provided by the invention needs 7 steps, but the reaction yield of each step is relatively high, so that the total yield can reach 25.8%.

Provided are electrically conductive carbon black and a preparation method therefor, and a lithium battery. The preparation method comprises: mixing raw material carbon black and a halogenating reagent to perform a halogenation treatment, so as to obtain an electrically conductive carbon black precursor; mixing a carbon black alkynylation reagent and a cuprous salt to perform an activation treatment, so as to obtain an activated alkynylation reagent; and mixing the activated alkynylation reagent and the electrically conductive carbon black precursor to perform a carbon black alkynylation treatment, and subjecting the resulting product to a deprotection treatment, so as to obtain electrically conductive carbon black.

The invention provides a synthesis method of a citral compound, which comprises the following steps: taking nerol or geraniol as a raw material, taking a complex formed by TEMPO, imidazole and cuprous salt as a catalyst, taking dichloromethane as a solvent and taking oxygen as an oxidant, and carrying out oxidation reaction under a homogeneous catalysis system to obtain single-configuration citral with high yield. The method has the advantages of high reaction activity, high selectivity, cheap and easily available initial raw materials, cleanness, environmental protection and very high industrial application value.