SU1595850A1 - Method of producing flocculant - Google Patents

Abstract

The invention relates to the field of producing water-soluble flocculant polymers, which can be used to thicken industrial suspensions, to enrich mineral raw materials, in particular, to clarify flotation waste during the processing of sulfur ores. Flocculant is obtained by reacting polyacrylamide with the product of the reaction of epichlorohydrin and a mixture of higher C 16 – C 20 fatty acids dispersed in a solution of a graft copolymer of polyacrylamide with carboxymethyl cellulose. The reaction is carried out for 2-2.5 hours at 60-80 ° C at concentrations of modifying agent and graft copolymer in the reaction mixture, respectively, 6.2-13.1 and 0.2-0.33 wt.%. This makes it possible to increase the efficiency of flocculation by increasing the sedimentation rate of suspended particles by 1.2-1.4 times and increasing the degree of clarification by 2-3%. 2 tab.

Description

The invention relates to the production of water-soluble polymers, flocculants, which can be used to thicken industrial suspensions, to enrich mineral raw materials, in particular, to clarify the flow of fluids in the processing of sulfur ores.

The aim of the invention is to increase the efficiency of flocculant.

Examples 1-5. Water is added to a flask equipped with a stirrer, a mixture of salts of higher fatty acids (C (C-4)) and stirred until complete dissolution of the latter. Then epichlorohydrin is gradually added with constant stirring.

The resulting product is dispersed in a 0.5% solution of a graft copolymer of polyacrylamide with carboxymethyl cellulose by stirring until a homogeneous mixture with a concentration of 8-20% by dry substance is obtained. Then, the resulting dispersion is mixed with a% polyacrylamide solution, heated to 60-80 ° C and maintained under stirring for 2-2.5 hours.

Data for individual examples is provided in Table. one.

Flocculating flotation wastes, which are a stable limestone – water suspension, were carried out. For separation, a suspension with a content of 100 g / l of solid was taken. Added

cl

about

00

cl

2 ml of a 0.15% solution of flocculant and the suspension was stirred with a sixfold raising and lowering of the mixer. The rate of sedimentation of the flocculated suspension and the degree of its clarification were determined.

The results of the determination are given in table. 2..

As can be seen from the data table. 2, the rate of sedimentation of limestone suspension by flocculant, obtained by the proposed method (examples 2-k), is 1.2–1 times higher than when using the known flocculant, Ste- The clarification of the suspension is thus appreciated. The residual content of the solid phase in the discharge decreases 1.2-1, times, which allows

Claims (1)

to obtain better water for recycling water to the enterprise. Invention Formula The method of producing flocculant, which includes the interaction of polyacrylamide with a modifying agent, characterized in that, in order to increase the effectiveness of flocculant, the reaction product of epichlorohydrin and a mixture of salts of higher fatty acids C 1-Cyo dispersed in the grafted solution copolymer of polyacrylamide with carboxymethyl cellulose, the reaction is carried out for 2-2 5 h at bO-3 C at concentrations of modifying agent and a graft copolymer in the reaction mixture, respectively, 6.2-13 And and 0.2-0.33 wt .. Table 1 Examples of the process 5.63 5.25 6.5 7 91 91 85 83 3.0 6.2 0.33 0.33 0.2 0.2 90 80 70 60 .3.0 2.5 2.2 2.0 8.4 13.1 9 76  83 8.4 13.1 13.3 0.2 50 1.5 Deposition rate, m / s The degree of clarification, the residual solids content in the discharge, mg / l 0,0107 0, OY1 0,015 0,0138 0,0101 0.0108 95 -9798989A. 95 ten eleven ten table 2 eleven ten