3 results about "Dimethyl oxalate" patented technology

The invention discloses a Ni3P/SiO2 catalyst as well as a preparation method and application thereof. The Ni3P/SiO2 catalyst is composed of a SiO2 carrier and Ni3P loaded on the SiO2 carrier, the mass percent of Ni3P in the catalyst is 10-45%, the balance is the SiO2 carrier, the particle size of Ni3P in the catalyst is 6-15 nanometers, and the specific surface area of the catalyst is 50-250 m<2>/g. Experiments show that the Ni3P/SiO2 catalyst provided by the invention is high in activity, high in selectivity and good in stability, especially has the advantages that the selectivity of methyl glycolate can still reach 85% or above under deep conversion of dimethyl oxalate (greater than 99.9%), a high-selectivity temperature window is wide and the like, and can be used as a catalyst for a reaction of preparing methyl glycolate through hydrogenation of dimethyl oxalate; and in addition, the preparation method disclosed by the invention is simple, mild in condition and easy to realize large-scale production.

A catalyst used for synthesis of dimethyl oxalate from CO is disclosed, the catalyst comprises a carrier and a bimetallic nanoparticle, the carrier is crystalline form Al2O3, the specific surface area of the Al2O3 is 20-200m<2> / g, the pore volume is 0 .5-1.5m<2> / g, the pore diameter is 3-20 nm, the bimetallic nanoparticle is an active component formed by combination of metal lead and a metal M, and the M is any metal element of Fe, Ni, Co and Mn. Advantages of the catalyst for synthesis of dimethyl oxalate from CO are as follows: by use of the previously-synthesized Pd and M bimetallic nanoparticle and relatively high specific surface area of theta-Al2O3, dispersion of the Pd and M on the carrier is improved, the space time yield and selectivity of the catalyst are improved, the synthesis efficiency is improved, the catalyst is low in use requirements, can be used at low temperature, reduces production energy consumption, and saves production costs, the preparation process of the catalyst is simple, preparation is convenient, and the finished catalyst is easy to use, and worthy of promoting.