SU728902A1 - Steam-air mixture purifying method - Google Patents

Description

The invention relates to methods for purification from acetone of mixtures of toxic vapors and gases with air and can be used to remove acetone from exhaust gases of industrial enterprises using oxygen-containing organic compounds as the main raw material for the synthesis of polymers, varnishes, drugs and others, and can also be used to solve the general problem of cleaning the air basin.

A known method of heterogeneous deep catalytic oxidation of vapors of a series of 15 kylorinated derivatives of hydrocarbons, including acetone [1].

A known method of removing acetone from a vapor-air mixture by 20 deep oxidation of it (to CO _g and H ₂ O) on a palladium catalyst containing palladium black on a carrier of active alumina at elevated temperature [2]. *5

The method consists in passing an acetone-air mixture through a catalyst bed at an initial concentration of acetone of 0.01-0.07 mg / L, a steam-air flow rate of 0.6 and 30

1.3 l / min.cm ^g . Under these conditions, acetone begins to oxidize on the RE - catalyst at 50 ° C; 100% oxidation is observed at 150 ° C.

The disadvantage of this method is the high cost of the catalyst used, the fact of the necessity of using a precious metal salt in the synthesis of the catalyst.

The purpose of the invention is to reduce the cost of cleaning the vapor-air mixture from acetone while maintaining the maximum degree of purification and eliminating the need to use precious metal salt when cleaning.

This is achieved by the fact that the process is conducted on active alumina modified with copper and nickel.

Example. The catalyst is obtained by treating in statistical conditions at room temperature a base — active alumina, grade A — 1, fraction 1–2 mm in nickel ammonia solution in the subsequent reaction of the obtained intermediate product with ammonia solution. kata copper.

A 0.05 mg / L acetone-vapor mixture is passed through 5 cm (2.0 g) of kata

728902 4 lysers of the following composition, mg-ion / 2 A1l0 ^ ·

Si2.5

N11.0

A1 _a O ₃ The rest with a speed of 0.6 l / min. cm ⁵ at 150 ° C. ⁵

The concentration of acetone is determined by chromatographic method. Under these conditions, the mixture is almost completely cleared of acetone (With _pro = 0.001 mg / l). The oxidation state at 150 ° C is 100%.

Claims (2)

37289 of a lysator of the following composition, mg-ion / 2 IfeOaС and 2,5 Ni 1,0 The rest at a speed of 0.6 l / min. .5 The concentration of the grit is determined by the chromatographic method. Under these conditions, the mixture is purified from aocheton almost completely {Demand, 0.001 mg / l). The degree of oxidation is 100%. aluminum, modified copper and nickel, Sources of information taken into account in the examination 1. Thomas C. Industrial catalytic processes and effective catalysts. M .: Mir, 1973. 2. Rokhchina R.G., Kondrasheva A.L., Plachenov T.G. - ЖПХ, 51, 1978, 10, 2300.