SU844619A1 - Method of automatic control of vinyl chloride emulsion polymerization - Google Patents

Description

Offsets: iavda values} 1) Yu of the second difference from the corresponding aaiuuuioro ziachish. a peak of an increase in at least one large number of differences from the difference. We increase the amount of the initiator to the mix; p; or, when thinking better, it is the flow rate and) the controller.

In the drawing, a block diagram of the control system is depicted for the implementation of the proposed method.

The polymerization is carried out in three parallelly arranged polymerization of the Tpayv, poajauioiDiafl mixture from the beds that go to the mixer 4.

With HOMOiUbio sensors 5-9 and monomer conversion, the monomer conversion is measured. By measuring 10, the molecular weight of the polymer is measured. Regulators 3. 1-14 peiyrihpyio co} 1 version, regulator 15 molecules p} 5 mass, pery, riHTOpoNi 16 konversgao, With the help of valves 17-2, they regulate the influence of TP1-III on the process. When performing operations on signals from o-IO sensors, the computing device 21 is used.

With NOMO1ZI sensors 8 and 9, the measurement is noncompliant and Kc; LBepciui, respectively, in the line cMeiiiOtuii, 1 and 1–3 zizatoroy 1-3 and ia output from the mixer 4. The signal | 21, where their difference 1 is determined and this difference c) is entered with its given value. When this difference deviates from the specified 3) on. Oni device 2 1 alternately connects the sensor 5-7 J pe; y / KTOpi, i 11-13, with the help of the on-version; ia 15 output from each 1 to 1 nd 1-3. In device 21, the difference is between the difference of nenenay of xanancy and conversion at the exit of the mixer 5 4 (which is determined by the sensor 9 and p1; the hum 7OR 1 (3) and the difference is compared with its planar value. With an increase) iajuieH} ioii the g-values from the sugs; the alternating value of the regulating valve 20 increases the flow of the injector to the mixer 4, and the decrease of G1t; and

assistance (those from the regulation of 17 clans 17, 18 or 19 are mentally responsible for initiator iodine to the corresponding polymerizer 1, 2 or 3.

The milling of the proposed method in the processes of polymerization {) 1zii increase the yield of 11lolumes (-; a} ia 0.5% due to the newer accuracy in stabilizing the conversion of monomer to gmmer.

Form m u l

and 3 o Oh p

The method of automatic control of the process of emulsion polymerization of Viln; ll. Of a polymorph, carried out in South Africa; nocturnal no. Chimers with a mix of Romacea streams) .Out the mixture coming out of them, in c, the reader, consisting in stabilizing the molecular; obtained by no.inxiepa by changing the temperature of the reaction, stabilizing monomer monomer (mixed temperature) temperature zones). Rehakli and consumption shshivatora. This is the fact that, due to the accuracy and stabilization of conversion, the difference in the values of the monomer conversion at the output and inlet of the mix is determined. c) 1M of its 3iia4O i; ieM, on deviation of the value of the specified first difference from the given value; Noch1 value:; rarely ims; p from volpnin.uko) and: rsiii lia output for each zero killer and conversion amount at the output of the machine, determine the second value of the difference between the aforementioned values and the deviation of 11 n. differences from; your 111, its given value, nrch (increase; but K) ai} The first measure of one Lyrojiofi p-hnost value from the backward value increases the flow rate of the initiator to the blend, and when y is less than 1, they ingress the flow of ingi the appropriate port-riggator.

1. USSR author's certificate N 261689, class, C 08 F 114/06, 1967.

Claims (2)

Formula A method of automatic regulation ₁₅ Nia process of emulsion polymerization of vinyl chloride. carried out in parallel-connected polymerizers with mixing the flows of the reaction mixture leaving them in a mixer, which consists in stabilizing the molecular weight of the obtained polymer by changing the temperature of the reaction mixture, stabilizing the conversion of the monomer by simultaneously changing the temperature of the reaction zone and the initiator’s consumption, part and with == the fact that, in order to increase the accuracy and stabilization of the conversion of the monomer, determine the first difference in the conversion of the monomer at the output and input of the mixer, 30, the magnitude of the indicated first difference is compared with its predetermined value; when the magnitude of the indicated first difference deviates from the predetermined value, the output conversion is measured in turn 3- · of each polymerization unit and the conversion value at the mixer output, determine the second difference value of the mentioned values and the deviation of the value of the found second difference from the corresponding value for 10, with an increase of at least one value of the second difference from the set value, increase the initiator flow into the mixer, and when decrease - reduce the initiator consumption by ⁴⁵ s. Sources of information taken into account during the examination H) 1. USSR copyright certificate No. 261689, cl. C 08 1 114/06, 1967.