Chemisorption material manufacture method

FIELD: sanitary and hygienic facilities.

SUBSTANCE: invention relates to technology of manufacturing chemisorption materials for use in municipal hygiene sphere. Method consists in treatment of chemisorption carboxyl-containing material in Na form with 0.5-1.0% aqueous acid solution, e.g. hydrochloric acid solution, at modulus (ratio of weight of chemisorption material to acid solution volume) 1:30 and treatment time 0.5-1.0 h to transfer material into H-form. Chemisorbent is then washed with softened water to pH 5-6, after which material in H-form is treated for 0.5-1.0 h with 0.5-1.0% potassium hydroxide solution, modulus 1:30. At the expiration of treatment time, material is washed with softened water to pH 5.0-6.5. Presence of three-dimensional lattice, both during treatment time of chemisorption material in the form of fibers or nonwoven material and upon use of products from this material, prevents dissolution of polymer in water or in aqueous solution of acid or potassium hydroxide. Owing to filtration, chemisorbent entraps in water heavy metal ions contained therein and water is saturated with potassium ions so that chemisorption material acquires at least 4 mmol/g of carboxyl groups in K-form.

EFFECT: optimized manufacture conditions.

2 ex

 

The invention relates to medicine, namely communal hygiene.

Patients with cardiovascular diseases requires water with the necessary potassium. To obtain such water by its bandwidth (filter) through a chemisorption layer of material, having in its composition of potassium.

At present in drinking water at the household and collective filters purification of commercially produced and widely used sorbents type AG-3, AG-5, belonging to the class of activated carbons, adsorbent type AG-5 and AG-8S are also activated carbons, but additionally impregnated with silver. Get these sorbents on the basis of wood and coal. (Tamamyan A.N. // Water and sanitary engineering, 1994, No. 12, p.8-10.)

Also used sorbents type SGBV-30, SGBV-30M, SGBV-30A, representing mineral material derived from natural cryptocrystalline graphite by crushing and heat treatment. (Rodenko VP, punks / / / Water and sanitary engineering, 1994, No. 2, pp. 27-28.)

Found their application in the production of sorbents for purification unit water and natural mineral sorbents - zeolites. (Kravchenko, VA, Korostyshev A.S., Kravchenko N, Kozlovskaya I. etc. // Water and sanitary engineering, 1994, No. 5, pp.31-32.)

The closest solution to our invention is a method for the preparation of acrylic fiber. The essence of this method lies in the fact that polyacrylonitrile fiber with 1.5 wt.% carboxyl groups treated with an aqueous solution containing 8-15 wt.% hydrazine at a temperature of 90°C for 1.0-1.5 hours, for a three-dimensional chemical grid and its subsequent processing 1.5 to 2.0 wt.% of sodium hydroxide. (Werew BTW, Chemistry, 1981, No. 3, p.146-147.)

A method of obtaining chemisorptive fiber by combining hydroidolina and alkaline hydrolysis in a single process flow. (Patent 2102544, class D 01 F 11/04 08 J 5/20, 1998.)

The disadvantages of the first two methods is that the produced water gets rid of small amounts of impurities mainly of organic origin, and there is no correction of the mineral composition of this water. The third method differs in that it is very difficult to find a natural material that would be optimal for its adsorption, cation-exchange, molecular sieve, catalyst, and other useful for water purification properties.

The prototype of our invention is used regardless of the method of obtaining chemisorptive fiber as a material for water purification from heavy ions IU allow, for example, iron, zinc, Nickel, etc. This analogy, removing from the water the various elements cannot enrich last potassium ions, which are necessary elements for patients with cardiovascular diseases.

The aim of our invention is to provide chemisorption material containing in its structure at least 4 mmol/g of carboxyl groups in the form.

The essence of our proposed method consists in processing chemisorptive carboxyl-containing material, such as VION, in the Na form acid. By putting it into H-form exercise of 0.5-1.0 wt.% aqueous solution of hydrochloric acid or another and module (the ratio of the mass of the chemisorptive material to the volume of acid solution) 1:30, the processing time of 0.5-1.0 hours. After this chemical sorbent is washed with softened water to a pH of 5-6. Then the material in the protonated form is treated with 0.5 to 1.0 wt.% potassium hydroxide solution for 0.5-1.0 hour module 1:30. After the processing time it is washed with softened water to a pH of 5.0 to 6.5. This chemisorption material contains not less than 4 mmol/g of carboxyl groups To form. The presence of three-dimensional chemical grid prevents in the process chemisorption material in the form of fibers or non-woven cloth, and operating products dissolution of the polymer in water or in water restorability or potassium hydroxide.

Obtained in this way chemisorption material containing in its composition potassium, used as a filtering material through which water flows. By filtering the chemical sorbent traps out of the water it contains heavy metal ions, and the water is saturated potassium ions.

Example 1. Staple carboxyl-containing fiber in the Na form is loaded into a perforated basket reactor. Basket fiber installed in the reactor, chemical processing, close the lid and fill with 0.5 to 1.0 wt.% of hydrochloric acid. Processing of the fiber occurs in continuous circulation in a closed loop reactor pump. The temperature of the process room, a duration of 0.5 hour. Upon completion of the reaction, the spent solution is poured into the container to strengthen and subsequent use. The fiber was washed with softened water when circulation to a pH of 5-6. Backwash time of 0.5 hours. After that, the fiber treated with 0.5 wt.% CON in continuous circulation in a closed loop reactor pump. Duration 0.5 hours. At room temperature. Thereafter, the fiber was washed with softened water at room temperature in a closed loop reactor pump. Duration 0.5 hours. To pH 5-6. After that chemisorption material contains not less than 4 mmol/g of carboxyl groups To form. The ZAT the fiber is placed in the dryer temperature which is not higher than 80°C. the Fiber is dried to a moisture content of not more than 10 wt.%. The dried fiber is directed to the manufacture of non-woven fibers.

Example 2. The experience carried out as in example 1, but instead of staple fiber use non-woven fiber, which is placed in a perforated basket. The treatment with acid solutions of potassium hydroxide and subsequent leaching softened water on the mode specified in example 1.

The method of obtaining chemisorption material, which consists in the processing of the carboxyl-containing fibrous chemical sorbent in the Na-form first of 0.5-1.0%acid solution with a ratio of mass chemisorption material to the volume of the acid solution is 1:30, for 0.5-1.0 HR for translation in H-form, and then of 0.5-1.0%solution of potassium hydroxide with the same ratio of components within the same time for the conversion of chemical sorbent in the form of flushing softened water after each stage.



 

Same patents:

The invention relates to methods for ion exchange fibers based on polyacrylonitrile (PAN) and its copolymers and can be used in the extraction of metal ions Hg and Cr precise water from industrial complex salt composition

The invention relates to the field of finishing and modification of fibrous textile materials in the form of fibers, yarns, fabrics or knitted fabrics and can be used for manufacture of products for sanitary and technical purposes with high moisture absorption
The invention relates to the production of chemisorptive fibers by polymineralic transformations fiber-based chain polymers, in particular on the basis of polyacrylonitrile, copolymers of polyacrylonitrile or polyvinyl chloride

The invention relates to a method for macrosector of the anion exchange resin is a crosslinked copolymer with aminoalkenes groups, which can be used in the chemical, nutritional and microbiological industry for the purification of solutions of biologically active substances
The invention relates to a method for producing cross-linked polymers and resins

The invention relates to methods for ion exchange fibers based on polyacrylonitrile (PAN) and its copolymers and can be used in the extraction of metal ions Hg and Cr precise water from industrial complex salt composition
The invention relates to a method for producing anion exchange resin curing type used in various reactions of ion exchange in water treatment and hydrometallurgy, which allows to increase the osmotic stability and mechanical strength of the resulting anion exchange resin
The invention relates to methods for complexing ion exchangers designed for the recovery of precious metals from solutions, and can be used in analytical chemistry and in hydrometallurgy for the selective concentration and recovery of platinum metals from solutions

The invention relates to the production of ion-exchange structured fibrous materials and can be used in factories, producing and processing of polyacrylonitrile (PAN) fibers with subsequent application of the resin for trapping reagent from sewage and ventilation gases
The invention relates to the production of sulfonated cation exchange resins based on crosslinked copolymers of styrene and refers in particular to continuous processes of their production

The invention relates to a technology for polygaloides anion exchange resin designed for the disinfection of condensates in water systems and drinking water

FIELD: sanitary and hygienic facilities.

SUBSTANCE: invention relates to technology of manufacturing chemisorption materials for use in municipal hygiene sphere. Method consists in treatment of chemisorption carboxyl-containing material in Na form with 0.5-1.0% aqueous acid solution, e.g. hydrochloric acid solution, at modulus (ratio of weight of chemisorption material to acid solution volume) 1:30 and treatment time 0.5-1.0 h to transfer material into H-form. Chemisorbent is then washed with softened water to pH 5-6, after which material in H-form is treated for 0.5-1.0 h with 0.5-1.0% potassium hydroxide solution, modulus 1:30. At the expiration of treatment time, material is washed with softened water to pH 5.0-6.5. Presence of three-dimensional lattice, both during treatment time of chemisorption material in the form of fibers or nonwoven material and upon use of products from this material, prevents dissolution of polymer in water or in aqueous solution of acid or potassium hydroxide. Owing to filtration, chemisorbent entraps in water heavy metal ions contained therein and water is saturated with potassium ions so that chemisorption material acquires at least 4 mmol/g of carboxyl groups in K-form.

EFFECT: optimized manufacture conditions.

2 ex

FIELD: sorbents.

SUBSTANCE: invention relates to technology for preparing sorbents with fibrous structure by using waste of industrial manufacture. Method involves treatment of fibrous matrix from waste of tanning leather chips with polyelectolyte an aqueous solution obtained by alkaline hydrolysis of polyacrylonitrile or copolymer based on thereof. Prepared sorbent shows the improved capacity for extraction of different components from different aqueous media.

EFFECT: improved preparing method, improved and valuable properties of sorbent.

2 cl, 1 tbl, 2 ex

FIELD: polymer materials.

SUBSTANCE: invention relates to manufacture of ion-exchange fibers with special properties, which can be used as sorbent or as a sorbent constituent for cleaning liquid media, largely natural and waste waters. Method consists in performing alkali hydrolysis of polyacrylonitrile fiber in presence of hydrazine at elevated temperature completed by treatment of fiber with active agent causing degradation of chromophore groups of fiber. Alternatively, ion-exchange fiber is manufactured via alkali hydrolysis of polyacrylonitrile fiber in presence of hydrazine at elevated temperature, hydrolysis reaction being effected in concentrated solution of salt of alkali metal with weak acid followed by treatment of fiber with active agent as above.

EFFECT: improved characteristics of fiber at lower consumption of reagents and stabilized manufacturing process to provide ion-exchange fiber with desired number of chelating sorption groups due to appropriate balance of acid and basic groups resulting from hydrolysis.

18 cl, 5 tbl, 16 ex

FIELD: waste water and gas emission treatment.

SUBSTANCE: invention relates to methods for preparing catalytic materials to clean waste waters and gas emissions via removal of organic and inorganic components by liquid-phase oxidation process. Method comprises consecutive treatment of knitted cloth with hot alkali solution containing 14-42 g/L hydroxylamine chloride and an aqueous solution of variable-valence metal salts. In the first stage, treatment is carried out with modifying hydroxylamine chloride and ethylenediamine-containing solution wherein molar ratio of polyacrylonitrile unit number to ethylenediamine ranges from 2 to 10 and solution pH is 6-9. Treatment temperature is 95-105°C and treatment time 1-1.6 h. In the second stage, treatment with aqueous solution of variable-valence metal salts is carried out for 0.5 to 2 h.

EFFECT: simplified manufacture technology, reduced expenses on reagents, and reduced process time without loss in the firmness of fixation of variable-valence metal salts on cloth.

2 tbl, 21 ex

FIELD: catalysts for waste water and emission gas treatment.

SUBSTANCE: invention relates to technology of removing organic and inorganic components from waste waters and emission gases via liquid-phase oxidation, in particular, to preparing textile-supported polymer catalyst consisting of polyacrylonitrile monothreads and complex threads. Knitted cloth is treated with modifying solution at 106 to 150°C for 10 to 30 min when ratio of amounts of polyacrylonitrile units to amount of chlorine-containing hydrazine salt equal to 20-30 and the same to chlorine-containing hydroxylamine salt 10-15, pH of solution being 6-9. After that, cloth is treated with transition metal salts for 1.0-2.0 h until content of metal on catalyst achieves 0.81-1.2 mmol/g. Treatment is followed by washing with desalted water.

EFFECT: simplified catalyst preparation technology and intensified preparation process.

2 cl, 2 tbl, 30 ex

Up!