The method of producing catalyst

 

(57) Abstract:

The invention relates to the production of sorbents and catalysts used in tools, air purification, and can be used in the industrial production of specified products. Method for obtaining catalysts, including preliminary heat treatment of raw materials, impregnation with solutions of salts and drying, and upon receipt of the catalysts in the first stage heat treatment is performed at a temperature of 700 - 850oC in the presence of superheated water vapor, followed by cooling the raw material having a total porosity of 0.5 - 1.2 cm3/g and containing pre-printed copper compounds with a concentration of 2 to 7% copper (in terms of metallic copper), and the second and third stages of re-impregnation of chemical additives and drying by known methods, at the same time as the source of raw materials used as "pure" carbon sorbents and sorbent containing copper compounds. 1 C.p. f-crystals, 2 tab.

The invention relates to the production of sorbents and catalysts used in tools, air purification, and can be used in the industrial production of these producti and chromium, for example ammoniacal solution of copper sulphate and potassium chromate, followed by drying and heat treatment [1]

The disadvantage of this method is the inability to obtain catalysts with a wide spectrum of action, and that in this way the manufacture of the catalyst remains a possibility of partial recovery of the oxides deposited in the sediment during the first impregnation, oxides, formed during the second impregnation. However, the implementation of the method is hampered by very high purity requirements for chemicals when carrying out impregnation chromate copper, which leads to additional operations: repeated washing of the precipitate chromate copper and its dissolution in the hydroxide ammonium.

Closest to the proposed to the technical essence is a method of manufacturing a catalyst comprising activated carbon impregnated with copper compounds and chromium. How is that preheated to 100 180oC activated carbon containing from 5 to 10% copper, deposited by known methods, saturated ammonium solution of chromate and dichromate, and the optimal temperature is a temperature equal to 150oC. Drying the impregnated coal is prio-first, when drying the catalyst at a temperature of 100 180oC, but mainly at 150oC due to decomposition of the chromate ammonium compounds are formed pyrophoric compounds, bearing the danger of ignition of the mass of the catalyst, as a consequence, in these cases, you must use a multi-stage drying with a gradual temperature increase, which leads to significant additional costs. Secondly, obtained in this way catalysts have a narrow spectrum of action.

The aim of the invention is to improve the quality of catalysts, expanding the range of their activities and the expansion of raw materials for their manufacture.

This objective is achieved in that a method of producing catalysts, including preliminary heat treatment of raw materials, impregnation with solutions of salts and drying, is carried out in such a way that at the first stage heat treatment is performed at a temperature of 700 to 850oC in the presence of superheated water vapor, followed by cooling the raw material having a total porosity of 0.5 1.2 cm3/g and containing pre-printed copper compounds in amounts of 2 to 7 weight. (in terms of metallic copper), and the second and third stages potsa as "pure" carbon sorbents, and sorbents containing compounds of copper.

The difference of the proposed method against known is that at the first stage heat treatment is performed at a temperature of 700 to 850oC in the presence of superheated water vapor, followed by cooling the raw material having a total porosity of 0.5 1.2 cm3/g and containing pre-printed copper compounds in amounts of 2 to 7 weight. (in terms of metallic copper), and the second and third stages of re-impregnation of chemical additives and drying by known methods.

Another difference is that in the quality of raw materials used as "pure" carbon sorbents and sorbent containing compounds of copper.

The use of such techniques in the above mentioned modes of heat treatment and the characteristics of the raw material for catalysts of scientific and technical literature authors unknown.

The use of these features in the proposed method of preparation of the catalyst allows to achieve high quality catalysts, to expand the range of their activities and extend the raw materials for their manufacture, which becomes possible due to termoobrezan Esenia copper compounds, moreover, the raw material can be used as a "pure" carbon sorbents and sorbent containing compounds of copper, including copper-containing catalysts and chemo-sorbents designed for disposal, and the process parameters and characteristics of the raw materials are within the specified ratios.

Example 1. The feedstock containing 2 to 7 wt. copper, for example copper-containing carbon sorbent for coal-based SKT, spent hippopotami type UE-4P and other similar catalysts and hippopotami generated in the process of utilization of individual and collective protection means, is subjected to heat treatment in a rotary kiln at a temperature of 700 - 850oC in the presence of superheated steam. The steam consumption of 1 to 2 kg/kg of product. The consumption of raw materials 80 to 100 kg/h

After discharge from the furnace raw material is cooled to 20 70oC and impregnated with, for example, salts of bichromate potassium in an amount of 1.4 to 2.5 wt. in terms of Cr6+.

Depending on the destination of catalyst impregnation can be carried out and other active ingredients.

Drying of the product produced in the furnace, "KS" at a temperature of 150 to 170oC after pre-aging for at least 0.5 hours

">

As follows from the results of the experiments are given in table. 1, the reduction of the copper content less than 2% leads to a sharp decrease in the efficiency of the catalyst due to the lack of active component. The increase in the copper content of more than 7% not giving a substantial increase in time of protective action, increases proforest, i.e., ignition of the catalyst in the furnace.

Lowering the temperature of preliminary heat treatment below 700oC leads to the formation of low copper compounds, which in turn leads to a significant reduction of time of protective action for target components.

Rising temperatures over 850oC leads to a sharp decrease of yield due to his Obara, which in turn leads to lower strength, not giving a substantial increase in time of protective action.

When the total porosity of less than 0.5 cm3/g pore volume is insufficient for the necessary distribution of the input components on the inner surface of the carrier. The increase in total porosity of more than 1.2 cm3/g leads to a change in the distribution of pore sizes that the protective properties of the catalyst are reduced.

Prime porous structure, for example, SKT V0.8 to 1.2 cm3/g or AG-5 - V0.5 to 0.9 cm3/,

The coal then impregnated with solutions of copper compounds in the form of salts of oxygen-containing acids (CuSO4, Cu(NO3)2and so on) in an amount of 2 to 7 wt. in terms of metallic copper. Next, perform drying by known methods at a temperature of 100 150oC.

Further processing of the received material produced according to the technology described in example 1.

Example 3. The feedstock containing 2 to 7% copper or obtained according to example 2 is subjected to heat treatment in a rotary kiln at a temperature of 700

850oC in the presence of superheated water vapor, then the materials are cooled and impregnated with a solution containing sulfuric acid of 7 to 9 weight. and (or) chloride Nickel in the amount of 6 to 10 weight. Drying of the product produced in the furnace COP in a known manner.

The test results of the products obtained under the optimal parameters of the basis of the catalyst according to examples 1 and 2 are given in table. 2.

As follows from the results of the experiments are given in table. 2, the decrease in acid concentration to less than 7 weight. leads to a significant reduction of the protective characteristics of catalogdata.

Additional introduction of Nickel chloride can significantly improve the protective characteristics of the catalyst by ammonia, and the introduction of Nickel chloride in the amount of less than 6 weight. does not improve the protective characteristics, and the introduction of Nickel chloride in excess of about 10 weight. leads to reduce the protective properties of hydrogen sulfide without significant changes of the protective properties of ammonia due to the fact that excess Nickel chloride blocks the active centers involved in the absorption of hydrogen sulfide.

The proposed method of producing the catalyst by carrying out the first stage heat treatment at a temperature of 700 to 850oC in the presence of superheated water vapor, followed by cooling the raw material having a total porosity of 0.5 1.2 cm3/g and containing pre-printed copper compounds in amounts of 2 to 7 weight. (in terms of metallic copper), and the second and third stages of re-treatment chemical additives and drying by known methods when used as a feedstock, as "pure" carbon sorbents and sorbent containing compounds of copper, allows to achieve high quality catalysts, as well as to expand the range of their deist, including through the use of copper-containing catalysts and chenopodietea destined for disposal.

1. A method of producing a catalyst for purification of air contaminants, including heat treatment of raw materials, impregnation with solutions of active ingredients and drying, characterized in that is used as raw material carbon sorbent having a total porosity of 0.5 1.2 cm3/g and containing compounds of copper in quantities of 2 to 7 wt. in terms of metallic copper, and heat treatment of raw materials is carried out at 700 850oIn the presence of superheated water vapor, followed by cooling of the raw materials up to 20 - 70oC.

2. The method according to p. 1, characterized in that the feedstock used waste copper-containing carbon sorbents.

 

Same patents:

The invention relates to mechanical engineering and can be used, for example, in the automotive industry in the manufacture of catalytic converters to reduce exhaust emissions of cars

The invention relates to an improved process for the preparation of aniline by hydrogenation of nitrobenzene in the vapor phase and can be used in the manufacture of dyes, as well as in the petrochemical industry for the hydrogenation of nitro compounds to primary amines used in the manufacture of caprolactam

The invention relates to petrochemistry and oil refining, more specifically, to the manufacture of catalysts for Hydrotreating petroleum fractions

The invention relates to the field of oil refining, in particular to a method of preparation of the catalyst intended for use in the hydrogenation processes for Hydrotreating petroleum fractions

The invention relates to the preparation of reforming catalysts and can be used over the oil refining and petrochemical industry
The invention relates to the preparation of the catalyst of ethylene oxychlorination process containing chloride copper (II) on active aluminum oxide

The invention relates to the production of catalysts and can be used in purification processes of hydrocarbon fractions from acetylene and/or diene hydrocarbons and positional isomerization of olefins

The invention relates to catalytic chemistry, particularly the chemistry of the preparation of catalysts for Hydrotreating petroleum fractions

The invention relates to the field of heterogeneous catalysis, namely the metals in the carbon media

The invention relates to the field of porous carbon materials, which are used as adsorbents and carriers for catalysts

The invention relates to the field of heterogeneous catalysis, and in particular to a catalyst and method for preparing a catalyst for selective hydrogenation of diene and acetylene hydrocarbons into olefins

The invention relates to the catalytic production of carbon materials of fibrous structure and hydrogen from hydrocarbons

The invention relates to a process dihydrochloride (pyrolysis) of organochlorine compounds in the presence of heterogeneous catalysts for cleaning emissions, disposal of toxic compounds and produce useful products, in particular the processing of 1,2-dichloroethane with the aim of obtaining vinyl chloride

The invention relates to catalysts for the oxidation of anthracene to anthraquinone, which is an intermediate product in the synthesis of a number of valuable organic dyes

The invention relates to catalysts for the oxidation of anthracene to anthraquinone, which is an intermediate product in the synthesis of a number of valuable organic dyes
Up!