SU422447A1 - METHOD FOR PREPARATION OF OXIDIZED EDITING CREATOR FOR THE OXIDATION OF ORGANIC COMPOUNDS - Google Patents

Description

This invention relates to the manufacture of catalysts for the oxidation of organic compounds.

A known method of producing oxidized vanadium catalysts for the oxidation of organic compounds by treating the support with vanadium inorganic salts. The disadvantages of this method are the complexity of the preparation process and the low productivity of the catalyst.

In order to eliminate these drawbacks, it is proposed to use a volatile vanadium compound, for example VOCls, as an active component.

It is desirable to carry out the treatment in a stream of inert gas or air at 20–180 ° C with the subsequent removal of unreacted oxychloride by a carrier gas current at the reaction temperature.

The proposed nasal snoot is to produce oxide-wadium catalysts with increased activity compared to the known ones, using a simpler and more efficient preparation technology.

Example 1. Silica gel (fraction of 0.5-1 mm of grade SSC), purified from impurities and dried at 180 ° C, with a content of OH groups on the surface of 3.46 mg-eq / g is used as a carrier. 5 g of the indicated silica gel is charged into the flow reactor and

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at 180 ° C for 1.5 hours, they let in a stream of dry inert carrier gas (nitrogen, argon) of a pair of vanadium oxychloride. At the end of the process, the unreacted VOCls and the resulting hydrogen chloride are removed by a flow of carrier gas. The chemical composition of the obtained oxide-vanadium catalyst (in%); V2O5 9.61, SiOa 90.39.

Example 2. Same as in example 1, but the reaction was carried out in a stream of dry air at 20 ° C for 3 hours. The chemical composition of the catalyst obtained (in%): 205 9.43, SiOo 90.57.

Example 3. In a flow reactor load 2 sug vanadnih containing silnkagel (1 g of the sample, 0.41 mg / m and heated for 1 hour at 440 ° C in a stream of dry nitrogen and air. Then in the flow for 1 hour through the catalyst bed at the same temperature benzene vapors (coprecipitates 1%) with an air flow rate of 32 l / h. At the end of the reaction, the catalyst is kept for 1 hour in a stream of dry air. catalyst 45 g / l / h.

Example 4. Same as in example 1, but the reactor is loaded with an industrial oxidized vanadium catalyst obtained by impregnating silica gel with a solution of ammonium ammonium with a VzO content of 4.14 mg / .m. Catalyst productivity less than 2 g / l / hour.

Subject invention

1. Method of preparation of an oxide-vanadium catalyst for the oxidation of organic compounds by treating the carrier with an active component — inorganic salts

Vanadium, characterized in that, in order to increase the productivity of the catalyst, a volatile vanadium compound, for example VOCls, is used as the active component.

2. The method according to n. I, characterized in that the treatment is carried out in a stream of inert gas or air at 20-180 ° C with the subsequent removal of unreacted oxychloride by a current of the carrier gas during the reaction temperature.