Intelligent reaction system and method for preparing polypropylene by solution method
A reaction system and polypropylene technology, applied in the field of polypropylene preparation, can solve the problems of breakthrough improvement, uneven mixing of gas and liquid phases, low reaction efficiency, etc.
Inactive Publication Date: 2020-11-13
NANJING YANCHANG REACTION TECH RES INST CO LTD
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Problems solved by technology
The solution method usually uses a stirred bed reactor, tank reactor, tubular reactor, tower reactor, etc. as the polymerization reactor, but the phase boundary area and mass transfer coefficient provided by it are limited, and the gas utilization rate is low so that the reaction efficiency Therefore, it is difficult to achieve a breakthrough improvement in the reaction performance, which affects the overall efficiency of the reaction; in addition, due to the uneven mixing between the gas and liquid phases, the molecular weight distribution is also uneven, and the uniformity of the obtained polypropylene is uneven. High, affecting the quality of the product
Method used
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[0091] refer to Figure 1-2 As shown, it is an intelligent reaction system for preparing polypropylene by the solution method of the embodiment of the present invention, which includes a prepolymerization reactor 10 and a polymerization reactor 20, and the inside of the prepolymerization reactor 10 is provided with a device for dispersing broken materials into small liquids. The pre-polymerization micro-interface generator 101 of drop, the wall surface of described pre-polymerization reactor 10 is connected with propylene delivery pipeline and is connected with described pre-polymerization micro-interface generator 101, in order to pass propylene into the described pre-polymerization micro-interface generator Inside: The polymerization reactor 20 is provided with a micro-interface generating unit for dispersing broken materials into small droplets.
[0092] It should be emphasized that the micro-interface generator set includes a first micro-interface generator 201 and a secon...
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The invention provides an intelligent reaction system and method for preparing polypropylene by a solution method. The system comprises a pre-polymerization reactor and a polymerization reactor, whichare connected in sequence; a pre-polymerization micro-interface generator is arranged on the pre-polymerization reactor, and a micro-interface generator set is arranged on the polymerization reactor;the system also comprises a solvent removal tower, the solvent removal tower is used for removing a solvent and impurities from a polypropylene product; a polypropylene inlet is formed in the middleof the solvent removal tower; the polypropylene inlet is connected with the bottom outlet of a flash tank; and a nitrogen micro-interface generator for dispersing and crushing high-temperature nitrogen into micro-bubbles is arranged in the solvent removal tower. The micro-interface generator is arranged on the pre-polymerization reactor; meanwhile, the micro-interface generator set is arranged onthe polymerization reactor, on one hand, the mass transfer area between a gas-phase material and a liquid-phase material is increased, the reaction efficiency is improved, and the energy consumption is reduced; on the other hand, gas-liquid phases are more uniformly mixed, the uniformity of the obtained polypropylene is higher, and the product quality is improved.
Description
technical field [0001] The invention relates to the technical field of preparing polypropylene, in particular to an intelligent reaction system and method for preparing polypropylene by a solution method. Background technique [0002] Polypropylene is a high molecular polymer formed by the polymerization of propylene monomer, and is a general-purpose synthetic resin. As a polymer plastic, it occupies an important position in modern chemical production and is one of the five major engineering plastics. In addition, polypropylene is rich in sources, cheap in price, easy to process and shape, and has excellent comprehensive performance. Therefore, it is widely used in various fields such as chemical industry, chemical fiber, light industry, home appliances, construction, packaging, agriculture, national defense, transportation, and civilian plastic products. , in polyolefin resin, it is the third largest general-purpose plastic after polyvinyl chloride and polyethylene. Over ...
Claims
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IPC IPC(8): C08F10/06C08F2/01
CPCC08F10/06C08F2/01
Inventor 张志炳周政张锋李磊孟为民王宝荣杨高东罗华勋杨国强田洪舟曹宇
Owner NANJING YANCHANG REACTION TECH RES INST CO LTD