SU1054307A1 - Method for recovering nitro-compounds from aqueous solutions - Google Patents

Abstract

1. METHOD FOR EXTRACTING NITROSOEDNENIP FROM AQUEOUS SOLUTIONS, which involves passing the solution through a layer of activated carbon followed by treating the desorbing coal with an agent, characterized in that, in order to increase the degree. extracting nitro-containing anions, an equimolecular amount of the amine compound is added to the aqueous salt solution. 2. A method according to claim 1, characterized in that the salt of the amino compound is sulphate or guanidine nitrate, sulphate S or aniline nitrate, or aminoguanidine nitrate.

Description

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This invention relates to a method of the anabolic anions containing a nitro group from dilute water solutions of salts and can be used to treat wastewater at a number of chemical industries, per hour: the production of rare and radioactive isotopes, pharmaceutical substances, chemical fibers and fertilizers.

There is a known method of extracting nitro-compounds from aqueous solutions by passing the solution through a layer of activated carbon, followed by treating the coal with superheated steam at 200 to 210 ° C Tlj

The disadvantage of this method is the low degree of extraction of anions, containing di; nitro group, from rsgsbavlenny water solutions of salts.

The purpose of the invention is to increase the level of extraction of anions,

Deliver on-target, those that according to the method, including switching the solution through a layer of akvirovaknogo coal and obzrabotku uzl Bydoy at 50-70 ° C or go easily.

when organic solvent is added to the 1EOD salt solution, an equimolecular amount of the amine salt is added.

As the salt of amino compounds, and using i-ycUiH lKni sulfate or nitrate, sulfate or nitryl titanium, ki, or aminoguapidini nitrate,

PRI me R. Through a column filled with activated carbon (DU) type SKT (TU № g2 PG 937-6G) with

With a fractional composition of 0.25-0.50 mm, when loading a LU layer of 30.0 g, a cross section of 3.14 cm, an aqueous solution of the ammonium salt 5 of nitraminetetrazol is passed through with a concentration of 0.04 mol / l with aniline concentration added to the solution. The flow rate of the solution through the linac layer is 5 ml / min. Analysis of 5 nitraminotetraeol akion (5-NAT) is carried out spectrophotometrically at pH 8-9 at a wavelength of 275 nm and extinction at 7170. After passing 1180 Å solution after a layer of carbon in the filtrate, B-NyT c-giima2new breakthrough concentrate appears At a ratio of 0.0004 mol / l, 3 atoms of the AU layer with water at a rate of 2 ml / min. After passing 900 ml of water, the concentration of anion exchanger 5-IIAT in the eluate drops to 0.0004 mol / l and the desorption process is complete. Output, aniline solk 5 - nitraminotetrazole 97.5%, Di-ammonium carbon () n 5 and nitraamine tetrazole anion

0.418 mg-ion / g, and when extracted in a known manner, 0.205 mg-ion / g.

Table D shows the comparative data on the extraction, containing all HiiTporpynny, during the displacement and separation. aminomeric salts,

From Tc1 of the blitz it follows that - the design of (The method allows to significantly increase the degree of extraction of anions containing the nitro group, which determines its eco mimic effect,

Dmgdoniev salt 5-n -5traminotetrazola

0.205

Oh 040

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Claims (2)

1. METHOD FOR REMOVING A NITRO COMPOUND FROM AQUEOUS SOLUTIONS, comprising passing a solution through a layer of activated carbon followed by treating the carbon with a desorbing agent, characterized in that, in order to increase the degree. extracting anions containing a nitro group, an equimolecular amount of the amino compound salt is added to the aqueous salt solution first. 2. The method of pop. 1, characterized in that as the salt of the amino compounds use guanidinium sulfate or nitrate, anilinium sulfate or nitrate, or aminoguanidinium nitrate. ABOUT SI SLE About m