SU1006441A1 - Method for controlling coagulation of latex of divinyl-styrene rubber - Google Patents

Abstract

SPSI REGULATION. PROCESS OF COAGULATION OF LATEX DIVIUSHSTYRSLNSYAH) KAUCHU, OC5: marching EEL when mixed in a reactor with a solution of hvistvoy vtrvv and vogazratvym cepyi ioMt acidified -. acidic acid, which consists of periFiViVaciCiOi and reagent marsas In the reactor by the action of the cleavage of the serum of the acid, which acidifies the serum, and in that, with a chain of elevation of one hundredth of the resistance in Kazgchuk, pH value of the reaction mass. In a coagulation reactor, a correction of 19 ° C is directly proportional to the asif: TieKca surface tension applied to the inlet of the coagulation reactor. .. 7 / ps. /

Description

The invention relates to 1E1 Automated process of coagulum of latex and can be used in the production of synthetic rubber. A known method for controlling the coagulation process of synthetic rubber patex is carried out by mixing the latex with the electrolyte and return serum in the reactor, which consists in changing the electrolyte consumption depending on the electrolyte concentration in the serum return and the latex tension of the latex Cl. The disadvantage of this method is the instability of the quality of rubber. The closest in technical relevance to the proposed and basic object is a method for regulating the process of coagulum latex divisor-styrene rubber, carried out when mixed with a scientific research institute in a latex reactor with a solution of sodium chloride and returnable serum, acidified with S1MM sulfuric acid, concluded in regulation pH of the reaction mass in the reactor by affecting the consumption of sulfuric acid, acidifying serum, 2. The disadvantage of this method is that it does not stabilize the moisture content in rubber, since it does not take into account changes in the value of the tension of latex supplied to the inlet of the coagulation reactor. At low values of the surface tension of the latex in the coagulation reactor, the formation of fine particles predominates, which give a very dense tape that does not have sufficient porosity. This greatly complicates the drying operation of the tape and the processing of rubber, as a result of which the quality characteristics of the rubber, in particular, the content, deteriorate. Moisture in rubber. With large values of the surface tension of the latex in the coagulation apparatus, the crumb is so large that coalescence of individual particles occurs into large conglomerates. In addition, the tape drying and rubber processing operations are also difficult. The aim of the invention is to increase the stability of the moisture content in rubber. This goal is achieved by the fact that according to the method of regulating the coagulation process of latex of divinyl-styrene rubber, carried out by mixing. a latex reactor with a solution of sodium chlorine and a return serum acidified with sulfuric acid, which consists in regulating the pH value, the reaction mass in the reactor by affecting the consumption of sulfuric acid, acidifying serum, the pH value of the reaction mass in the coagulation rector is corrected directly proportional to surface tension of latex supplied to the inlet of the coagulation reactor. The drawing shows a block diagram of a system for regulating the process of coagulation of synthetic rubber latex. The control system includes coagulation reactor 1, latex pipelines 2, sodium chloride 3, return serum 4, return serum 5 to waste water and sulfuric acid 6, a web molding machine net 7, an analyzer 8 for measuring the pH of the reaction mass, during coagulation, the regulator 9 pH reactionary mass regulator 10 on the pipeline of sulfuric acid, an analyzer 11 for measuring the surface tension of the latex and the element 12 of the comparison. The method is carried out as follows. Divinyl-styrene latex is fed through line 2 to the coagulation reactor 1, and sodium chloride solution is fed through line 2. The reaction mass from reactor 1 goes to the net of the molding machine 7. The leaking serum through the net of the molding machine comes back to the reactor 1 through pipeline 4, and the excess through pipeline 5 removes s from the production. The pH value of the reaction medium is measured with a humus analyzer 8, and its proportional signal is adjusted to pH 9 of the reaction mass, and the CC reference element 12 is sent to the reference control chamber 9, proportional to the deviation of the current latex surface tension value measured by the analyzer 11 and assignment. The regulator 9 processes the dependence K. n „, - the consumption of sulfuric acid entering the reactor through the pipeline b;

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P | 1 surface vag chews to pH veltwy at

latex, nzmerenvoe with w agutgaivn n vorobot This allows for the aid of an avatshzator 11; .keep: size of forming part | w

It is the coefficient determined by the polymer at a coagulum given by reference experimentally to a hemolium. contributes to the ability (, O128), moo soaerzhvv moisture in rubber.

and, acting on the regulating organ 10, When a war of the invention changes the consumption of sulfuric acid. .nontonnazhs production average moschPri ulichenin vygovy bolt. el1 -reverency quadrant deviation

Ment 12 Comparison The task of regulating moisture content in rubber is reduced.

The ruling body 10 has increased the amount of 15-20%.

Claims (1)

METHOD OF REGULATION. LATEX COAGULATION PROCESS DIVINYSTYRENE RUBBER, carried out by mixing in the reactor latex with a solution of sodium chloride and return serum acidified with sulfuric acid, which consists in regulating the pH of the reaction mass in the reactor by affecting the flow of sulfuric acid, acidifying serum, by separating it and The reason is that, in order to increase the stability of the moisture content in the rubber, the pH of the reaction mass in the coagulation reactor is adjusted in direct proportion to the surface tension of the latex fed to the input reactor 1006441 2