Sorbent for separation or separation of ammonia and its derivatives and method thereof

 

(57) Abstract:

Use: receive sorbent for separation or separation of ammonia and its derivatives of complex multicomponent fluids and gaseous media. The invention allows to obtain non-toxic sorbent with considerable capacity for ammonia. The inventive organic cation exchanger in hydrogen form is first treated with a solution of salt or sodium hydroxide, then with a solution of salts of calcium to the calcium content of not more than 1.7 mmol/g of cation exchanger. 1 C. p. F.-ly, 1 table.

The invention relates to the field of chemical technology and is designed to receive sorbent for separation or separation of ammonia and its derivatives.

Known sorbents, selectively extracting ammonia and amines from gas mixtures, on the basis of ion-exchange materials with sulfo in the form of transition metals (cu, Co, Ni in different ratios). Way to obtain is in the handling of the respective ion-exchange materials with solutions of salts of transition metals (1, 2).

Known sorbents, selectively extracting ammonia and amines from wastewater and salt solutions, represents a cation exchange resin with carboxyl or sulfo in honey is th treatment with alkali (3).

A disadvantage of known methods is the use of transition metals with high toxicity (MPC Co, cu, Ni in water reservoirs 1,0, 0,1, 0.1 mg/l, respectively). These metal salts or even hydroxide easy suiryudan with sorbent with the formation of well-soluble Aminatou, the toxicity of which exceeds the toxicity of ammonia and the actual metal salts. This significantly reduces the scope of application of sorbents, largely excluding their use for systems of detoxification and purification of pharmaceuticals and biologically active substances, cleaning dialysate and life support systems.

Elution of metal salts with cation ammonia is a widely known fact, and in the presence of ammonia occurs and the dissolution of hydroxides and oxides with the formation of Aminatou metals that precludes the use of a sorbent in the food, pharmaceutical and medical industry, especially in cases of intravenous drugs, hemo-, plasma - and chelators. To a certain extent, and this limits the application of these sorbents for the purification of dialysis solution.

Features sorbent and method of its production on the basis of the cation and the="ptx2">

The sorbent is an organic cation exchange resin in a mixed sodium-calcium form when the calcium content of not more than 1.7 mmol/g of cation exchanger.

The method consists in processing the cation or polyampholytes first salt solution or sodium hydroxide, then with a solution of salts of calcium to the calcium content of not more than 1.7 mmol/g of cation exchanger. When this is achieved considerable capacity for ammonia from aqueous media and virtually eliminates the toxicity of the eluate due to the replacement of highly toxic si Ni Co ion Sa which is one of the components of physiological fluids and tissues of the body. A particularly high effect is obtained by purification of solutions containing protein preparations and amino acids, which have the ability to clean toxic Cu Ni Co due to the education amigatex complexes and complexes with aminoalkylsilane acids. When implementing the present invention significantly expands the scope of application of sorbents.

The proposed sorbents due to the replacement of toxic elements at physiologically optimal calcium can be used for cleaning of drugs, solutions of biologically active substances, cleaning dialysate, as well as anteros what's waters and gases, as possible entrainment of toxic substances is missing.

Example 1. 15 g of the cation exchange resin with carboxyl groups derived from copolymers of acrylic acid and its derivatives with SOY on Paon 7,436 m-equiv/g, treated with ultrasound, washed with 300 ml of 3% aqueous solution of hydrochloric acid, and then 300 ml of distilled water, followed by 300 ml of 3% aqueous sodium hydroxide solution, treated with 500 ml of 2% aqueous solution Cal2to Ca content 3,19 mmol/g, washed with water and dried to air-dry state.

Example 2. 15 g of the cation exchange resin with carboxyl groups derived from copolymers of acrylic acid and its derivatives with SOY on Paon 7,436 m-equiv/g, treated with ultrasound, washed with 300 ml of 3% aqueous solution of hydrochloric acid, and then 300 ml of distilled water followed by 300 ml of 3% aqueous sodium hydroxide solution, treated with 500 ml of a 0.7% aqueous solution l2to the content of CA 1.04 mmol/g, washed with water and dried to air-dry state.

Example 3 the Original cation exchange resin of example 1 was washed with 300 ml of 3% aqueous solution of hydrochloric acid, and then 300 ml of distilled water, followed by 300 ml of 3% aqueous sodium hydroxide solution, without ultrasonic treatment, and then treated with 500 ml of 0.7% RA is P CLASS="ptx2">

Example 4. 15 g of the cation exchange resin with sulfo derived from copolymers of styrene and divinylbenzene with SOY on Paon 3,03 m-equiv/g, washed with 300 ml of 3% aqueous solution of hydrochloric acid, and then 300 ml of distilled water, followed by 300 ml of 3% aqueous sodium hydroxide solution, treated with 500 ml of 2% aqueous solution l2, washed with water and dried to air-dry state. The result is a cation exchange resin in the calcium form calcium was 1.69 mmol/g of cation exchanger.

Example 5. 15 g of the cation exchange resin with sulfo derived from copolymers of styrene and divinylbenzene with SOY on Paon 3,35 m-equiv/g, washed with 300 ml of 3% aqueous solution of hydrochloric acid, and then 300 ml of distilled water, followed by 300 ml of 3% aqueous sodium hydroxide solution, treated with 500 ml of 2% aqueous solution l2, washed with water and dried to air-dry state. The result is a cation exchange resin in the calcium form calcium content of 1.36 mmol/g of cation exchanger.

To obtain comparative data sample of the resin (examples 1-5) are placed in a dynamic column diameter 8 mm, height of the layer 10-14 cm, and miss dialysate containing 17 mmol/l of ammonium chloride at the rate of 2 ml/min On the basis of the analysis of samples to determine emkosti of dialysate shown in the table.

1. Sorbent for separation or separation of ammonia and its derivatives, is made on the basis of organic cation exchange resin containing carboxyl or sulfopropyl in the form of a metal salt, characterized in that it is made in the form of the sodium-calcium salts with the calcium content of not more than 1.7 mmol/g of cation exchanger.

2. A method of producing a sorbent processing of organic cation exchange resin containing carboxyl or sulfopropyl solutions of metal salt, wherein the cation exchange resin in hydrogen form is first treated with a solution of salt or sodium hydroxide, then with a solution of salts of calcium to the calcium content of not more than 1.7 mmol/g of cation exchanger.

 

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FIELD: environment control.

SUBSTANCE: the invention is pertinent to the field of environment control and is intended for solution of two the most important ecological problems: processing of polymeric waste products, liquidation of emergency spills of oil products and petroleum and purification of industrial waste water of petroleum refining industry enterprises. The method of production of the fine-grained (with a particle size of no more than 35±10 microns and a sorptive capacity of 3.5-4.0g/g) amorphous-crystalline polymeric powder provides for comminution of the waste products of polyethylene and the secondary polymeric raw material (agricultural and packing waste polymeric films, second-hand oil containers and packings, flow gates, etc.), preliminary dissolved in the organic solvents at the temperature of 90°C and at intensive mixing during 30 minutes till formation of a paraffin-shaped mass. The rotation rate of the rabble is 2500-3000 rpm. The produced mass is mixed with water and heated up to the temperature, which does not exceed by ~10°C the temperature of the polymer melting point in a big amount of a dissolvent. Then the mass is vacuumized with simultaneous condensation of vapors of dissolvent and water and their separation. The method ensures simplification of the process, increased efficiency and homogeneity of the sorbent.

EFFECT: the invention ensures simplification of the process, increased efficiency and homogeneity of the sorbent.

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