2 results about "Vinylacetylene" patented technology

The application discloses a NaCl modified Cu-Na-DMF / AC catalyst and a preparation method and application thereof. The NaCl modified Cu-Na-DMF / AC catalyst comprises a main catalyst, a ligand, a metal additive and a carrier. The main catalyst is copper chloride; the ligand is N,N-dimethylformamide; the metal additive is sodium chloride; and the carrier is coconut shell activated carbon. The NaCl modified Cu-Na-DMF / AC catalyst and the preparation method and application thereof have the advantages that the low coordination copper site induced by NaCl modification has superior catalytic activity, so that the NaCl modified Cu-DMF complex loaded on the carrier can significantly improve the stability of an acetylene dimerization catalyst system, the single-pass conversion rate of acetylene and the ethynyl acetylene selectivity are improved, the by-products in the reaction process are less, the content of acetylene polymer is greatly reduced, and then the separation difficulty and the production cost are reduced. Moreover, the catalyst has the advantages of mild preparation condition, simple process, short preparation period, low cost, and suitability for acetylene dimerization reaction.

The invention relates to an organic nitrogen carboxylic acid modified Nieuwland catalyst as well as a preparation method and application thereof. The invention relates to an organic nitrogen carboxylic acid modified Nieuwland catalyst which comprises cuprous chloride, ammonium chloride, organic nitrogen carboxylic acid and a solvent. The invention further discloses a preparation method and application of the organic nitrogen carboxylic acid modified Nieuwland catalyst. According to the organic nitrogen carboxylic acid modified Nieuwland catalyst as well as the preparation method and the application thereof, the conversion rate of acetylene and the yield of vinyl acetylene are improved through organic nitrogen carboxylic acid modification.