Polymerization reactor for producing ethylene propylene diene monomer by using solution method and process flow control method
A technology of EPDM rubber and polymerization reactor, applied in the direction of comprehensive factory control, electrical program control, etc., can solve the problems of monomer imbalance, unstable liquid level control, liquid "flooding", etc., to prevent unqualified Production of good or defective products, improved polymerization process control, reduced yield and product quality
Active Publication Date: 2012-09-19
吉林众鑫化工集团有限公司
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Problems solved by technology
[0011] This kind of reactor also has unstable liquid level control, and liquid "flooding" often occurs during the polymerization process, making it difficult to accurately control the liquid level
Because the constant composition of the reaction mixture and the uniformity of the temperature of the reaction mixture cannot be guaranteed, the analysis shows that the monomer components in the liquid phase and the monomer components in the gas phase are unbalanced, and the monomer components in the gas phase often appear ethylene and propylene monomers High content phenomenon
Method used
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Embodiment 1～3
[0088] In a 65 cubic meter reactor, hexane is used as a solvent, and the liquid level is 60% of the height of the reactor. The designed reactor can well ensure that the monomer, solvent and catalyst components are evenly dispersed.
[0089] The stirring system of the polymerization solution ensures the uniform mixing of the components of the solution in the reactor and ensures that the residence time of each component is constant.
[0090] The design of the entire system of the reaction part (container, agitator, top light monomer evaporation and exhaust circulation loop, and related instruments connected to DCS) can produce more than 20 grades of EPDM rubber. Using this reactor, typical Examples 1-3 are shown in Table 1 below.
[0091] Table 1. Examples 1-3 (reactor volume 65m 3 , diameter 3.5m, height 7m, 3-layer stirring paddle) process conditions and results
[0092]
[0093] The invention's original reactor with a stirring system and original polymerization process c...
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The invention discloses a polymerization reactor for producing ethylene propylene diene monomer with more than 20 trade marks meeting the market requirement by using a solution method and a process flow control method. A foam catcher, a gamma-ray liquid level controller, 2-3 layers of stirring paddles are arranged in a reactor of which the ratio of the height to the diameter is 1.5-3.0; an annular tube distributor is arranged at the bottom of the reactor; before reactive monomers such as ethylene, propylene and a solvent enter the annular tube distributor, the removing heat of a raw material cooler is 30-50 percent of reaction heat; before a light-component monomer and hydrogen gas are evaporated and return to the reactor from a gas outlet by condensing, the removing heat of the raw material cooler is 50-70 percent of reaction heat; in the rubber product, the ethylene is 50-70 percent by weight, ENB (Ethylidene Norbornene) is 0-10 percent by weight and the balance is the propylene; the Mooney viscosity is ML(1+4)125DEG C(20-150); and evaporation components are subjected to online detection by using a gas chromatography; and the flow of each component is controlled by a DCS (Distributed Control System) and various components are homogeneously distributed, and thus the temperature and the rubber viscosity are uniformly distributed, the rubber is prevented from being aggregated and the like.
Description
technical field [0001] The invention relates to a polymerization reactor for producing EPDM rubber by a solution method and a process control method. In particular, it relates to a solution method EPDM rubber polymerization reactor and a process control method for producing 20 kinds of grades demanded by the market. Background technique [0002] EPDM rubber is a rubber elastomer composed of ethylene, ENB (Ethylidene norbornene-norethylidene) and propylene monomers. It is widely used in the chemical industry and other fields, such as transportation, construction, energy, power supply, technology. items etc. [0003] The production of industrial EPDM rubber began in the late 1860s. After Ziegler and Natta (Ziegler, - Natta) invented the Ziegler-Natta catalyst system, the catalyst was obtained by polymerizing olefins, dienes and other organic compounds. application. [0004] At present, there are two kinds of production methods of EPDM rubber, namely solution method and slur...
Claims
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IPC IPC(8): C08F210/18C08F2/01C08F2/06G05B19/418
Inventor 福斯基薛妍怡张汉倬
Owner 吉林众鑫化工集团有限公司