Composition for producing cation-exchange fibre material

FIELD: chemistry.

SUBSTANCE: composition is also used to soften and desalinate process water, in production of synthetic detergents, in the paint industry and industry of polymer materials. The composition for producing cation-exchange fibre material consists of paraphenol sulphonic acid, formalin, basalt wool subjected to preliminary heat treatment for 1 hour at 350-450°C and microwave treatment at radiation power of 750 W for 30 s, and further contains phenol resin - a phenol production waste. The composition contains, wt %: paraphenol sulphonic acid 48.4-54.4, formalin 35.3, heat- and microwave-treated basalt wool 9.1, phenol resin 1.2-7.2.

EFFECT: composition enables synthesis of cation-exchange fibre material with an improved set of properties, particularly higher static exchange capacity and low filtrate oxidation susceptibility, and solves the problem of recycling phenol resin.

2 tbl, 4 ex

 

Developed composition is used to obtain the cation exchange material is used for the treatment of industrial wastewater from monomers in the production of chemical fibers; from dyes and their components - in paint manufacture; synthetic surface-active substances in the manufacture of synthetic detergents, petroleum products - petrol stations; for softening and demineralization of water in the systems of technical water; suspended sediment and solids, dispersed zeleznicnych compounds. Known composition to obtain a polymer press-composition with a cation exchange properties. Cation exchange matrix are synthesized on the surface and in the structure of the fibrous filler after impregnation his impregnating solution. The composition contains in its composition paraphenylenevinylene, formalin, and the fibrous filler in the following ratio of initial components, wt.%: paraphenylenevinylene - 30,12; formalin - 63,63; fibrous filler and 6.25. The disadvantage is the low value of the static exchange capacity (to 2.1-2.3 mEq/g) [1]. Most are similar in composition and function to the invention is a composition to obtain a cation exchange fibrous material [2], consisting of paraphenylenevinylene and formalin, featuring the jaś fact, which further contains a filler - basalt wool, pre-heat treated for 1 hour at a temperature of 350-450°C and subsequent microwave treatment at a power of 180 or 750 watts for 30 seconds when the following contents of the original components of the composition, wt.%: paraphenylenevinylene - 50÷55,8, formalin - 40,9÷35,1, basalt wool is 9.1. The main disadvantage of the composition to obtain a prototype is a low value such parameters as static exchange capacity, the high value of the oxidation filtrate. The technical object of the present invention is to increase the static exchange capacity cation exchange fibrous material and the decrease in the value of the oxidation filtrate. The problem is solved due to the fact that the composition to obtain a cation exchange fibrous material containing paraphenylenevinylene, formalin, basalt wool, pre-heat treated for 1 h at a temperature of 350-450°C and subsequent microwave treatment with radiation power of 750 W for 30 s, further comprises a phenolic resin - waste production of phenol, in the following ratio of components, wt.%:

Paraphenylenevinylene48,4÷54,4
35,3
Thermo-, microwave-processed basalt wool9,1
Phenolic resin1,2÷7,2

The proposed composition and the final cation exchange fibrous material was obtained as follows (the properties of the cation exchange fibrous material is presented in table 1): paraphenylenevinylene mixed with phenolic resin, the resulting mass under vigorous stirring and cooled constantly put in formalin, then the impregnating solution is impregnated with basalt wool, pre-heat treated for 1 h at 400°C and subsequent microwave treatment with radiation power of 750 watts for 30 seconds Impregnation impregnation solution should be performed within 2 minutes. Then gradually carry out the synthesis of oligomers in the structure and on the surface of basalt wool, drying, carry out the curing of the material forming a three-dimensional mesh structure. The obtained cation exchange fibrous material is crushed. This was followed by washing the obtained material and subsequent centrifugation to remove any remaining moisture.

The invention consists in that part of the phenol used in the synthesis of cation-exchange resin, replacing aetsa phenolic resin (TU-2424-006-00151673-01).

Phenolic resin - the fraction of high-boiling components, which is a waste product of phenol, the amount of which ranges from 120-140 150-200 kg/t of phenol. In the world (the USA, Russia, Poland, Slovenia and other countries) phenolic resin is used as boiler fuel in individual form or in a mixture with other products (pyrolysis tar, oil). Incomplete combustion of the resin leads to pollution of the atmosphere, therefore, the development of economically sound and environmentally acceptable methods of disposal represents a challenging task for both Russian and international industrial practice [3].

Example 1.

The composition comprises, in wt.%:

Paraphenylenevinylene54,4
Formalin35,3
Thermo-, microwave-processed basalt wool9,1
Phenolic resin1,2

Example 2.

The composition comprises, in wt.%:

Paraphenylenevinylene53,2
Formalin35.32 per
9,1
Phenolic resin2,4

Example 3.

The composition comprises, in wt.%:

Paraphenylenevinylene48,4
Formalin35,3
Thermo-, microwave-processed basalt wool9,1
Phenolic resin7,2

Example 4.

The composition comprises, in wt.%:

Paraphenylenevinylene43,6
Formalin35,3
Thermo-, microwave-processed basalt wool9,1
Phenolic resinto 12.0

In the composition to obtain a cation exchange fibrous material (example 1-3) contains 1.2-7.2% of phenolic resin. With the increasing content of phenolic resin above was 7.2% (example 4) there is a decrease in the properties of the resulting cation. This is because the composition of the phenolic resin include to the components, sparingly soluble in water, which hampers their homogenization in the reaction medium leads to an increase in the viscosity of the system. Upon receipt cation exchange fibrous material that reduces the adhesive interaction between the impregnating composition and thermo-, microwave-processed basalt wool. The optimum composition (example 2), in which improvement of the basic performance characteristics of the cation exchanger: an increase in the mass fraction of moisture, static exchange capacity, reducing oxidation filtrate (table 2). Thus, the introduction of cation exchange phenol-formaldehyde matrix of phenolic resin in the synthesis of cation exchange fibrous material on the basis of thermo-, microwave-processed basalt wool is promising, as it leads to an increase in static exchange capacity of the cation exchanger, which indicates the increase in the number of ionic groups, to reduce oxidation filtrate, indicating that the reduction of the unreacted low molecular weight compounds that fall in the treated water, and contributes to solving the problem of disposal of by-product phenol.

Sources of information

1. Technology of plastics / edited CEO. - M.: Chemistry, 1972. - 616 S.

2. Pat. 2447103 RF, C08L 61/10, C02F 1/42, C08J 5/20. Composition to obtain a cation exchange in the fibrous material. [Electronic resource] / applicant and patentee - State educational institution of higher professional education "Saratov state technical University". No. 2010125269/05; Appl. 18.06.10; publ. 27.12.11//http://www.fips.ru

3. The problem of rational use of phenolic resin / Sangalo Y.A. and [other]. - Chemical industry. - 1997. No. 4. - P.3-13.

Table 1
No.DescriptionThe placeholderExample 1Example 2Example 3Example 4
1The static exchange capacity, mEq/g2,73,14,43,52,6
2The degree of cure, %77,074,072,071,068,0
3Mass fraction of moisture, %45,8 51,360,446,647,6
4The oxidation filtrate, mg/g1,70,90,81,11,3

Table 2
No.DescriptionThe placeholderExample 2
1Density, kg/m13501530
2Mass fraction of moisture, %45,860,4
3The degree of cure, %7772
4The specific volume of the ion exchanger in the H form, cm3/g4,44,3
5The static exchange capacity, mg*EQ/g2,7, 4,4
6Dynamic exchange capacity, mol/m3920900
7The oxidation filtrate, mg/g1,70,8
8Osmotic stability, %9998

Composition to obtain a cation exchange fibrous material containing paraphenylenevinylene, formalin, basalt wool, pre-heat treated for 1 h at a temperature of 350-450°C and subsequent microwave treatment with radiation power of 750 W for 30 s, characterized in that it further contains a phenolic resin - waste production of phenol at the following content, wt.%:

Paraphenylenevinylene48,4-54,4
Formalin35,3
Thermo-, microwave-processed basalt wool9,1
Phenolic resin1,2-a 7.2



 

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