35 results about "Rhenium compounds" patented technology

Process for preparing sulfinyl derivatives of Formula 2, useful as inhibitors of gastric acid secretion, comprising the selective oxidation of the corresponding sulfides of formula 1, as represented in the following schemeThe oxidation is performed with hydrogen peroxide in the presence of low amounts of a rhenium compound as catalyst, at a temperature from 0° C. to room temperature.

The invention discloses a supported copper-rhenium bimetallic catalyst. The catalyst comprises an active body, an active auxiliary agent, an alkali auxiliary agent and a carrier; the chemical composition of the active main body is Cu x Re (1‑x) O, wherein x is 0.7-0.9. The invention provides a preparation method of a catalyst, comprising: (1) dissolving a copper-containing compound, a rhenium-containing compound, a coagent precursor and a base auxiliary precursor in water, configuring a mixed salt solution, and dispersing the carrier in the mixing Obtain a slurry in a saline solution; (2) drop an alkaline precipitant into the slurry and adjust its pH value to 7-9, age to obtain a slurry, and control the temperature to 60-90°C during the dropping process; (3) The slurry is post-treated to obtain a supported copper-rhenium bimetallic catalyst. The invention provides a preparation method and application of a modified supported copper-rhenium bimetallic catalyst. The modified supported copper-rhenium bimetallic catalyst provided by the invention has higher reactivity and glycol selectivity.

The invention relates to a preparation method for a composite silver catalyst used for producing ethylene oxide through ethylene oxidation. The preparation method comprises the following steps: 1) dissolving a compound containing silver and a compound containing chromium in an amine-contained solution or ammonia water so as to prepare a silver-ammonia solution; 2) subjecting an alpha-Al2O3 carrier to soaking in the silver-ammonia solution prepared in the step 1), taking out the soaked alpha-Al2O3, then carrying out draining, and carrying out calcination treatment so as to prepare a semi-finished silver catalyst; 3) dissolving the compound containing silver, the compound containing rhenium and an optional compound containing cesium in the amine-contained solution or the ammonia water so as to prepare the silver-ammonia solution; and 4) subjecting the semi-finished silver catalyst prepared in the step 2) to soaking in the silver-ammonia solution obtained in the step 3), taking out the soaked semi-finished silver catalyst, then carrying out draining, and carrying out calcination treatment so as to prepare the composite silver catalyst. The invention also relates to the composite catalyst and application of the catalyst in production of ethylene oxide.