Composition for producing cation-exchange fibre material

FIELD: chemistry.

SUBSTANCE: composition is meant for producing cation-exchange fibre material used in water treatment processes and treatment of industrial sewage. The composition is also used to soften and desalinate water, in production of synthetic detergents, in the paint industry and industry of polymer materials. The composition consists of paraphenol sulphonic acid and formalin. The composition additionally contains filler - basalt wool. The basalt wool is first heat treated for 1 hour at temperature 350-450°C, followed by microwave treatment at 180 or 750 W for 30 s. Content of components is as follows, wt %: paraphenol sulphonic acid 50-55.8, formalin 40.9-35.1; basalt wool 9.1. The composition enables synthesis of cation-exchange fibre material with improved properties, particularly lower oxidation number of the filtrate, higher specific volume of the cationite, as well as high dynamic exchange capacity and high osmotic stability of the cationite.

EFFECT: composition enables synthesis of cation-exchange fibre material with improved properties.

1 tbl, 4 ex

 

Developed composition is used to obtain the cation exchange fibrous material, 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 connections.

Known composition to obtain a cation-exchange resin Katex FN, having in its composition phenolsulfonate, naphthalenesulfonate, formaldehyde.

The disadvantage of the cation Katex FN is the low value of the static exchange capacity (SOY=0,54 mg-EQ/g) [1].

Known composition designed to produce 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 formalin, paraphenylenevinylene and fibrous filler in the following ratio of initial components, wt.%:

- paraphenylenevinylene - 30,12;

- formaldehyde - 63,63;

- fiber is - 6,25.

The material is characterized by a static exchange capacity of 2.1 to 2.3 mEq/g

The disadvantage is the low value of the static exchange capacity [2].

Most are similar in composition and function to the invention is a composition to obtain a cation - exchange resin KU-1 [2]. Original composition contains formalin, paraphenylenevinylene, in the following ratio of components of the ion-exchange matrix, wt.%:

- paraphenylenevinylene - 61,4;

- formalin - 38,6.

Cation exchange resin obtained from this composition, refers to the type of bifunctional strongly acidic sulfonic cation polycondensation-type phenol-formaldehyde cation exchange matrix. Has two types of ionic groups: alphagroup SO3H and a hydroxyl group HE.

The main disadvantage of the composition to obtain a prototype is a low value such parameters as the specific volume of the resin, dynamic exchange capacity, osmotic stability and high value of the indicator of the oxidation filtrate

The technical task of the invention is the decrease in oxidation filtrate, the increase in the specific volume of the cation exchanger, increasing its dynamic exchange capacity and increase the osmotic stability of the cation exchange fibrous material.

P the set task is solved by that composition to obtain a cation exchange fibrous material containing paraphenylenevinylene and formalin, further comprises a filler - basalt wool, pre-heat treated for 1 hour at a temperature of 350-450°C and subsequent microwave treatment with radiation power 180 W or 750 W for 30 seconds, in the following ratio, wt.%:

paraphenylenevinylene - 50÷55,8;

formalin - 40,9÷35,1;

Rockwool is 9.1.

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).

Example 1.

Paraphenylenevinylene under vigorous stirring and cooled constantly injected into the formalin. Then the impregnating solution is impregnated with basalt wool, pre-heat treated at 400°C for 1 hour and subsequent microwave treatment for 30 seconds at a power of 750 watts. 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, then the material is subjected to rough grinding, are drying, carry out the curing of the material with the formation of three-dimensional mesh structure. The resulting cation is the exchange fibrous material is crushed. This was followed by washing of the obtained material and subsequent centrifugation to remove any remaining moisture.

The composition, wt.%:

phenolsulfonate - 50÷55,8;

formalin - 40,9÷35,1;

Rockwool is 9.1.

Example 2.

The composition and mode of microwave processing of basalt wool in example 1, characterized in that the heat treatment basalt wool is carried out at a temperature of 450°C.

Example 3.

The composition and mode of microwave processing of basalt wool in example 1, characterized in that the heat treatment basalt wool is carried out at a temperature of 350°C.

Example 4.

The composition and heat treatment basalt wool in example 1, characterized in microwave processing is carried out with the radiation power of 180 watts.

The use of heat treatment basalt wool at a temperature of less than 350°C. is not effective, since the surface basalt wool in this case is not enough cleared inflicted on him apreta, and applying a heat treatment basalt wool at a temperature of temperature above 450°C will lead to embrittlement and subsequent destruction of the fibrous filler. Beyond these temperatures will lead to the deterioration of the basic properties of ion-exchange material

Processing basalt wool microwave radiation is carried out at a power of 750 W and 180 W in accordance with the s 30 seconds. The use of other values of the capacity of processing wool microwave irradiation leads to the reduction of the main indicators, which is confirmed experimentally.

The composition contains 9,1% by weight basalt wool. The increase in the percentage of the amount of impregnating solution in the composition will result in that part of the impregnating solution will remain absorbed basalt wool, resulting on the surface of the obtained cation exchange fibrous material is formed can be easily removed by the ion exchange layer, which results in excessive components of the impregnating solution.

The reduction percentage of the amount of impregnating solution in the composition will lead to insufficient impregnation basalt wool, to reduce the share of ion-exchange matrix in the cation exchange fibrous material. Thus, the deviation of the ratios of the components (basalt wool - impregnating solution) in the composition leads to a decrease of the complex properties of the resulting cation exchange fibrous material, which is confirmed experimentally.

This composition allows to synthesize the cation exchange fibrous material with enhanced properties.

In particular, with a lower value of the indicator of the oxidation filtrate, the reduction of this indicator speaks at the jensenii unreacted low molecular weight compounds, which then fall into purified water; a higher specific volume of the ion exchange polymer material, which indicates the increasing porosity, the surface of contact of the cation exchange fibrous material, increasing the availability of functional groups that, in turn, leads to increasing values of dynamic exchange capacity is a measure that is directly associated with the ability of a material to clean up polluted water under dynamic conditions; increased value osmoticheskoi stability, which indicates the increasing ability of the grains of the resin not to be destroyed during repeated volume changes in the process.

Sources of information

1. Chemist's Handbook. - Ed. 2nd, trans. and supplementary vol 4. Ed. Bpiolar. - M.: Chemistry. - 1966.

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

Table 1.
No.Descriptionthe placeholderexample 1example 2example 3example 4
1Density,kg/m 315701350141514751390
2The static exchange capacity, mEq/g3,62,72,32,02,4
3The oxidation filtrate1,831,71,71,751,8
4The specific volume of the ion exchanger in the H form, cm3/g3,24,4a 3.93,74
5Dynamic exchange capacity, mg·mol/DM3565920716650765
6Osmotic stability, %929997 9899

Composition to obtain a cation exchange fibrous material, consisting of paraphenylenevinylene and formalin, characterized in that it further contains a filler - basalt wool, pre-heat treated for 1 h at a temperature of 350-450°C and subsequent microwave treatment with radiation power 180 W or 750 W for 30 s at the following ratio of the initial components of the composition, wt.%:

Paraphenylenevinylene50-55,8
Formalin40,9-35,1
Rockwool9,1



 

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,

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