Method for production of sorbent catalyst

FIELD: sorption technique for purification of industrial emissions and individual pipe security facilities.

SUBSTANCE: method for production of sorbent catalyst includes preparation of impregnating solution by introducing ammonium carbonate and copper and chromium compounds into ammonia water in ratio ammonia water/ammonium carbonate/copper basic carbonate/chrome anhydride of 1:(0.07-0.15):(0.03-0.06):(0.02-0.04); impregnation with metal-containing carbon solution; aging; and granule thermal treatment.

EFFECT: sorbent catalyst with prolonged protective action in relation to chlorocyanide and decreased cost.

4 cl, 3 ex

 

The invention relates to the field of sorption technology and can be used in purification of industrial gases or in individual protection of respiratory organs,

A method of obtaining sorbent-Katalizator, including the impregnation of activated carbon with a solution of catalytic additives with a subsequent heat treatment, and as an impregnating solution take ammonia solution containing 8-16 wt.% carbonic acid, 10-25 wt.% lupranate copper, 2-5 wt.% chromium, and the ratio of coal-impregnating solution is 1:0.5 to 0.9, and the heat treatment is carried out in the furnace "fluidized bed" when 155-190° (see U.S. Pat. Of the Russian Federation No. 2083274, CL 01 J 20/20, G 01 31/08, epubl).

The disadvantage of this method is the difficulty of preparation of the impregnating solution and catalyst losses high-temperature treatment.

Closest to the proposed technical substance and the number of matching characteristics is a method for sorbent-catalyst comprising impregnation of metal-containing granules of activated carbon with an aqueous solution of bichromate of potash and triethylenediamine (TED) in the ratio of sorbent:bichromate of potash:TED 1:(0,04-0,08): (0,004-0,008), the aging is carried out for 1.5 and 1.8 h, and a pre-metal-containing granules are calcined at 800-850°C in an atmosphere of superheated water vapor (see U.S. Pat. RF 2108149, CL 01 J 20/20, G 01B 51/08, epubl).

The disadvantage of the prototype is a little while protective actions harzianum in short layers of sorbent-catalyst.

The technical result (goal) of the invention is the rise time of the protective action of the sorbent-catalyst for harzianum in short layers.

In modern conditions is of great importance while the protective action of the sorbent-catalyst in short layers. High values protective actions allow to reduce the weight and characteristics of the means of respiratory protection and to reduce their cost. Especially important it is for plagiosauroidea substances, an example of which is chlorian test substance in the test sorbents, catalysts.

This goal is achieved by the proposed method comprising preparing an impregnating solution by dissolving in emmakate copper chromium trioxide and nitric acid silver impregnation of metal-containing granules of activated carbon, the aging and heat treatment, and the preparation of the impregnating solution is injected into the ammonia water ammonium carbonate and copper compounds and chromium, and the ratio of the components in the impregnating solution of ammonia water: carbon dioxide ammonia:carbon dioxide is the main copper:chromic anhydride 1:(0,07-0,15):(0,03-0,06):(0,02-0,04), moreover, when the need is in the impregnating solution is injected 0,10-to 0.20 wt.% nitrate of silver in relation to the weight of metal-containing granules of activated carbon.

The difference of the proposed method against known is that the preparation of the impregnating solution is injected into the ammonia water ammonium carbonate and copper compounds and chromium, and the ratio of the components in the impregnating solution of ammonia water: carbon dioxide ammonia: carbon dioxide is the main copper: chromic anhydride 1:(0,07-0,15):(0,03-0,06):(0,02-0,04), moreover, if necessary, in the impregnating solution is injected (0,10-0,20) wt.% nitrate of silver in relation to the weight of metal-containing granules of activated carbon.

Of scientific and technical literature is not known to the preparation of the impregnating solution is injected into the ammonia water ammonium carbonate and copper compounds and chromium in a ratio of components in the impregnating solution of ammonia water:carbon dioxide ammonia:carbon dioxide is the main copper:chromic anhydride 1:(0,07-0,15):(0,03-0,06):(0,02-0,04), if necessary, in the impregnating solution is injected (0,10-0,20) wt.% nitrate of silver in relation to the weight of metal-containing granules of activated carbon.

The essence of the method consists in the following. To absorb plagiosauroidea substances, such as Harlan, you need to create a catalyst that would provide the greatest rate of decomposition of toxic substances. As a result of numerous experiments, it was found that the sequence of dissolution of the components in the am is iasnoi water by introducing carbon dioxide ammonium, carbonate basic, copper, chromium trioxide promotes their interaction in solution without precipitation, the optimal ratio of components selected during experiments.

The addition of silver contributes to the stabilization of the catalytic complex of metal-containing granules of activated carbon.

The method is as follows.

Take metal-containing granules of activated carbon, containing copper, chromium, silver, having a total pore volume of 0.6-0.8 cm3/, Prepare an impregnating solution by adding ammonia water estimated amount of carbon dioxide ammonium carbonate, basic copper and chromium trioxide and their ratio in the solution is ammonia water:carbon dioxide ammonia:carbon dioxide is the main copper:chromic anhydride 1:(0,07-0,15):(0,03-0,06):(0,02-0,04).

In the preparation of the solution maintain the temperature of 40-60°C. Then carry out the impregnation of the granules of metal-containing active carbon impregnating solution with a ratio of impregnation of 0.8 to 0.9. Granules vylizyvaut 1,5-1,8 h, and conducting heat treatment in a furnace of the fluidized bed at a temperature of 150-160°C. Then the sorbent-catalyst is cooled to room temperature and estimating time of protective action on Gloriana.

If necessary in the impregnating solution is injected promoting additive Attn isologo silver in an amount of 0.1-0.2 wt.% in relation to the mass of coal.

Test conditions sorbent-catalyst:

Vapor concentration CYANOGEN 5 mg/l

The layer height 2 cm

Specific volume flow

steam-air mixture of 0.5 l/min·cm2

Relative humidity 75%

obtained by the proposed method sorbent-catalyst had the time of protective action in a short layer (2 cm) 10-12 minutes

EXAMPLE 1. Take 1 kg of pellets of metal-containing active carbon with a total pore volume of 0.7 cm3/, Prepare an impregnating solution by dissolving in 1 l of ammonia water 70 g ammonium carbonate, 30 g of carbon dioxide, the main copper, 20 g of chromic anhydride, the ratio of ammonia:carbon dioxide ammonia:carbon dioxide is the main copper:chromic anhydride 1:0,07:0,03:0,02.

Granules vylizyvaut for 1.5 h, and conducting heat treatment at 150°With, then discharged and cooled to room temperature. The resulting sorbent-catalyst had the time of protective action harzianum 10 minutes

EXAMPLE 2. The implementation process as in example 1, except that prepare an impregnating solution with a ratio of ammonia:carbon dioxide ammonia:carbon dioxide is the main copper:chromic anhydride. 1:0,11:0,05:0,03.

The resulting sorbent-catalyst had the time of protective action Gloriana 12 minutes

EXAMPLE 3. The implementation process as in example 1 except that in preparing the impregnating solution with a ratio of ammonia water:carbon dioxide ammonia:carbon dioxide is the main copper:chromic anhydride 1:0,15:0,06:0,04.

The resulting sorbent-catalyst had the time of protective action harzianum 11 minutes

The time of protective action on Gloriana in a short layer of 2 cm from the prototype had 5-7 minutes Thus, the proposed method significantly (1.5-2.4 times) to increase the time the protective action of the sorbent-catalyst for Gloriana compared to the prototype.

From the above it follows that each of the signs stated together to a greater or lesser extent affect the achievement of the goal, namely the rise time of protective action on Gloriana sorbent-catalyst in short layers, and the entirety is sufficient to characterize the claimed technical solution.

1. A method of producing a sorbent-catalyst, comprising preparing an impregnating solution, the impregnation with the solution prepared granules of metal-containing coal, maturing granules and heat treatment, characterized in that the preparation of the impregnating solution is performed by successively adding ammonia water estimated amount of carbon dioxide ammonium carbonate, basic copper and chromium trioxide.

2. The method according to claim 1, characterized in that the impregnation serves active carbon containing copper, chromium and silver.

3. The method according to any of the preceding paragraphs, characterized in that the prepara is giving impregnating solution is carried out to ensure that the component ratio of the ammonia water : carbon dioxide is the main copper : chromic anhydride, equal 1:(0,07-0,15):(0,03-0,06):(0,02-0,04).

4. The method according to any of the preceding items, wherein in the impregnating solution further added nitric acid silver in an amount of 0.1 to 0.2 % by weight of coal.



 

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8 cl, 4 dwg

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8 cl, 4 dwg

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