RU76337U1 - BUTADIENE RUBBER INSTALLATION - Google Patents

Abstract

The proposal relates to processes for the production of synthetic bktadiene rubber. The installation contains reactors 1, 2 and 3 for the preparation of composite systems and obtain the finished product; reactors using dispensers 4 are connected to mixers 5, 13 and 18 for preliminary preparation of individual compositions according to the stages of the polymerization process; each mixer is connected to containers 8-11, 14, 15, and 19 filled with the starting components. The cameras are equipped with aggregates 23 for mechanical mixing and initiators 25 for the physical activation of the polymerization of the composite system; chambers also have highways 16, 20 communicating with them, pumps 17, 21 for dosed supply of the mixture sequentially from one working chamber to another. This allows us to intensify the entire process of progressive production of butadiene rubber, which has higher physical and mechanical parameters for frost resistance, heat tolerance, fracture and elongation-compression. Fig. - 1. Forms. - 3 p.

Description

The proposal relates to a technology for the production of butadiene rubber and relates to plants for the implementation of this process.

At present, constructions of plants for the production of butadiene rubbers are known, the most representative of which are plants containing a reactor for the polymerization of a composite butadiene-containing system, a device for dispersing the mass, containers with initial components, dispensers, a temperature control device, a storage hopper for the finished product / GB 1442370 C07F 7/18, 07/14/1976 .; BR 2830080, C08F 236/06, 07/08/1978., RU 2081128, C08G 77/385, 1997; RU 2087488, C08F 136/06, 1995./.

Significant and typical disadvantages of a single well-known installation is its basic structural scheme, in which there are no aggregates and nodes for a more complete process of polydispersion, polymerization and polycondensation of butadiene-containing composite system, which leads to deficiencies in strength indicators, crack resistance and low fatigue resistance of butadiene rubber and products based on it, while modern requirements have higher tactical and technical characteristics Attributes to this process and installations.

The technical task and the technological result of the developed installation for producing butadiene rubber is a fundamental improvement in the design of the installation for the possibility of a more productive and less costly production of butadiene rubber, which has enhanced characteristics of physical and mechanical properties: fatigue resistance, resistance to cracking, frost and heat resistance to elongation compression.

This in the proposal of the applicant is achieved by the design of the installation for producing butadiene rubber containing a polymerization reactor, a device for dispersing the mass, containers with the original

reagents (components), dispensers, thermostatic device, storage bin for the finished product, while the installation is equipped with additional reactors equipped with mixers for preliminary preparation of reaction systems, mixers are connected with additional containers and bunkers filled with additional initial components, the reactors are interconnected by highways in in the form of pipelines and pumps embedded in the line of highways, in the cavity of the mains and in the outlet pipe of the last reactor are introduced detectors communicated with an analysis device (rapid analysis) of each composition system and the final product, the reactors are equipped with mechanical and physical initiators activate each composition system in each reactor.

In the installation, emitters of acoustic waves in the ultrasonic range and microwave emitters are used as initiators. As instruments for analyzing systems and the finished product, a two-detector chromatograph with electrochemical and ultraviolet detectors is used.

The accompanying drawing discloses a schematic structural diagram of an installation for producing butadiene rubber. The installation contains reactors, for the implementation of the process, 1, 2 and 3; reactors with their technical equipment are connected by dispensers 4; wherein the reactor 1 is connected to the mixer 5, intended for preliminary preparation of the composite system (mass) of the components in the hopper 6 and the container 7; the mixer is also connected to additional containers: 8, 9, 10 and 11 by means of dispensers 12.

The reactor 2 is equipped with a mixer 13 and containers 14, 15 with additional components, while the reactor 1 is connected via a line 16 (mass pipe-pipe) and a pump 17 cut into this line with a mixer 13 of the reactor 2. The reactor 3 is equipped with its own mixer 18 and additional bunkers 19 with reagents, while the reactor 2 is connected in a similar way to the line 20 and the pump 21 with the reactor 3 through its mixer 18 and dispenser 4. Each reactor is equipped

the initiator of physical activation is 22, which is used as emitters, for example, of the magnetostrictive type, of acoustic waves in the ultrasonic range and in the microwave frequency range; and also use mechanical activators 23 in the form of a screw, or in the form of an impeller (a shaft with several blades) having a rotation drive 24.

Each reactor (1, 2, and 3) has a thermostatic device in the form of an enclosing casing having a cavity 25 between its wall and the wall of the reactor; A coolant (heated liquid, or refrigerant) is supplied into this cavity, depending on the stage of the process.

The composition of the composite system and the finished product are monitored by a device 26, which is used as a two-detector chromatograph with electrochemical and ultraviolet detectors 27 introduced into the lines 16, 20 and into the outlet pipe of the reactor 3 — the delivery of the finished product (butadiene rubber) to the storage container 28 or to supply the product to the production line.

Generating gas-vapor phases are sent for processing to filters 29, with which all reactors and their working chambers are equipped.

The installation for producing butadiene rubber is as follows. Reactor technical equipment: hoppers, containers and mixers are filled with the original components, using traditional components, but the composite systems are prepared in an original way due to the design of the installation, which has additional containers, mixers and special equipment for the reactor chambers (initiators of physical activation of the mixture): hopper 6 is filled with butadiene , container 7 — with a solvent (hexane), the solution is fed into mixer 5 with dispenser 12, heated, and kept for about 25 minutes; from containers 8, 9, 10 and 11, additional components are added to the mixer, which form the catalytic system: ethyl hexanoate + diisobutyl aluminum hydride + piperylene and hexane as a solvent. The composite mixture is fed into the reactor 1, where the primary process of polymerization of butadiene is carried out, keeping the temperature (device 25) in the range of 50-60 ° C; excess steam and gas phases

into the filter 29. The composite mass from the reactor is pumped 17 through line 16 to the mixer 13, where additional components from containers 14, 15 (solvent and catalytic system) are also introduced, the mixture is fed to reactor 2, where the polymerization process is continued at a higher temperature ( 70-80 ° C), activating the composition system, as in reactor 1, by initiators 22 and 23 to obtain a uniform macrocluster composition (mixture); excess vapor-gas phases are discharged into the filter 29; the mixture is fed by pump 21 through line 20 to mixer 18, an additional amount of solvent and catalyst system is introduced from containers 19, the mixture is fed to reactor 3 where the stage of formation of the polybutadiene composition and production of butadiene rubber is completed, which is discharged through the outlet pipe 20 to the storage hopper 28 or - on the technological process of manufacturing products using this product.

At each stage of the process, the composition and compliance of composite mixtures are monitored using detectors 27 and a two-detector chromatograph 26, as well as the finished product, butadiene rubber. In this case, the starting components are taken in accordance with current standards and requirements (TU 48-4-186-72; TU AD 11.46-89; TU 38. 103658-88, for solvents, catalytic system and butadiene).

Thus, in the installation it is possible to obtain butadiene rubber with higher indices (compared with the indices of known installations): Mooney viscosity - 43-45 units, narrow molecular weight distribution (K = 2.8), high strength indicator - 20 MPa, high fatigue endurance of deformation - more than 500,000 cycles, high resistance to cracking during bending - more than 400,000 cycles. These high physical and mechanical properties testify to the originality and high technological efficiency of the installation for producing butadiene rubber - this allows the applicant to take a patent for PM for this installation.

Claims (3)

1. Installation for the production of butadiene rubber containing a polymerization reactor, a device for dispersing the mass, containers with the starting reagents, dispensers, thermostatic device, storage hopper, characterized in that it is equipped with additional reactors equipped with mixers for the preliminary preparation of reaction systems, mixers connected to additional containers and bunkers filled with the original components, the reactors are interconnected by lines with pumps, in the cavity of the line and in the last reactor outlet introduced detectors communicated with each compositional analysis instrument system, wherein the reactors are equipped with mechanical and physical initiators activation system. 2. The apparatus according to claim 1, characterized in that the initiators use emitters of acoustic waves in the ultrasonic range and microwave emitters. 3. Installation according to claim 1, characterized in that as instruments for analyzing the system using a two-detector chromatograph with electrochemical and ultraviolet detectors.