SU798113A1 - Method of conjugated diene polymerization process control - Google Patents

Description

one

The invention relates to the automation of polymerization processes and can be used in the production of synthetic rubber.

There is a method of controlling the polymerisation process of conjugated dienes by adjusting the polymer Flour viscosity. By changing the catalyst consumption l.

The known method has limited capabilities with respect to the accuracy of polymer Flour viscosity stabilization due to uncontrolled wear and tear. impurity concentration in the charge.

The aim of the invention is to improve the accuracy of polymer Flour viscosity stabilization.

This goal is achieved by the fact that in a known method of controlling the polymerization process of conjugated dienes by adjusting the Mooney viscosity of the polymer by changing the catalyst consumption, the solvent or charge stream is additionally bypassed and introduced into it

. lithium polystyrene stabilize the amount of color change in the resulting mixture relative to the color of the initial solvent or mixture by changing the flow rate of the bypass stream of solvent or mixture, depending on the flow rate of the bypass stream of the mixture or solvent, change the flow rate of lithium butyl or organoaluminum compound introduced into the main stream of solvent or

SINTER.

The drawing shows a block diagram of a control system implementing the proposed method.

The method for controlling the polymerization process of conjugated dienes is carried out as follows.

Claims (2)

Charge; the catalyst enters the reactor 1 battery. Catalyst consumption is regulated by regulator 2, receiving information about the flow rate from sensor 3 and acting on valve 4. Part of solvent i of the charge) is bypassed through pipe 5, the flow of which regulates 3 with regulator 6, which receives information about the flow rate from sensor 7 and affects valve 8, line 5 is injected with lithium polystyryl, the flow rate of which is stabilized by regulator 9, which receives flow information from sensor o and acts on valve 11. lithium polystyrene is a mixture of lithium butyl and styrene, which is Ashena golden color. On the pipeline 5, behind the entry point of the lithium filter, there is a photocalori metric sensor 12, which sends information to the controller 13, stabilizes the photoelectric signal relative to the initial charge, which characterizes its specific color, by changing the task to the controller 6, i.e. by changing the flow rate of the bypass stream of solvent (charge). After the bypassing of the solvent (charge) through the pipeline 14, an organo-aluminum compound is introduced into the main flow, for example, triisobutylaluminum or lithium butyl, the flow rate of which is regulated by the regulator 15, which receives information from the sensor 16 and acts on valve 1 (charge) from the sensor 7 is fed to the computing device 18, which changes the task of the controller 15, i.e. changes the consumption of triisobutylaluminium or pitiebutip supplied to purify the solvent (charge) from impurities. When the bypass flow of the solvent (charge) of the specified value is exceeded, the consumption of triisobutylaluminum (lithium butyl) decreases and vice versa. On the battery code, a Polymer Flour Viscosity Sensor 19 is installed, which supplies information to the Mooney Viscosity Controller 20 of the polymer, which stabilizes this value by changing the catalyst consumption, i.e. changing the controller task 2. Thus, the polymerization process is controlled by pre-cleaning the mixture of impurities, which can reduce the catalyst consumption and improve the accuracy of stabilization of Mooney viscosity of the polymer. DETAILED DESCRIPTION A method for controlling the polymerisation process of conjugated dienes by adjusting the Mooney viscosity of the polymer by changing the catalyst consumption, in order to improve the accuracy of stabilization of the Mooney viscosity of the polymer, bypassing the flow of solvent or charge, introduces lithium polystyryl into it, stabilize the magnitude of the change in the color of the resulting mixture relative to the color of the initial solvent or mixture by changing the flow rate of the bypass stream of the charge or solvent, depending on the flow rate of the bypass The flow rate of the charge or solvent changes the consumption of lithium butyl or organoaluminum introduced into the main stream of solvent or charge. Sources of information taken into account in the examination 1. USSR author's certificate in application N 2398254 / 23-05, cl. C 08 R 136/04, 1976. Lithiumipoistiril