Micro-interface enhanced reaction system and method for preparing polypropylene

Abstract

The invention provides a micro-interface enhanced reaction system for preparing polypropylene. The system is characterized by comprising a prepolymerization reactor and a polymerization reactor whichare connected in sequence, the prepolymerization reactor is provided with a prepolymerization micro-interface generator used for dispersing crushed materials into micro-bubbles, and the polymerizationreactor is provided with a micro-interface generator set used for dispersing the crushed materials into micro-bubbles; a polymerization reaction product outlet is formed in the bottom of the polymerization reactor and is connected with a flash tank for decomposing a catalyst in a polymer; a product outlet for discharging a polypropylene product is formed in the bottom of the flash tank. The micro-interface generator is arranged on the prepolymerization reactor, and meanwhile, the micro-interface generator unit is arranged on the polymerization reactor, so that the mass transfer area between agas-phase material and a liquid-phase material is increased, the reaction efficiency is improved, and the energy consumption is reduced; and moreover, the temperature and the pressure in the polymerization reactor are reduced, and the safety and the stability of the whole system are improved.

Description

technical field

[0001] The invention relates to the technical field of preparing polypropylene, in particular to a micro-interface strengthening reaction system and method for preparing polypropylene. Background technique

[0002] Polypropylene is a thermoplastic synthetic resin with excellent performance, which is a colorless and translucent thermoplastic lightweight general-purpose plastic. With chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high wear-resistant processing properties, etc., polypropylene has been rapidly used in machinery, automobiles, electronic appliances, construction, textiles, and packaging since its inception. It has been widely developed and applied in many fields such as agriculture, forestry, fishery and food industry. In recent years, with the rapid development of my country's packaging, electronics, automobile and other industries, it has greatly promoted the development of my country's ...

Examples

Embodiment

[0076] refer to figure 1 Shown is the enhanced reaction system for preparing polypropylene of the present invention, which includes a pre-polymerization reactor 10 and a polymerization reactor 20, and the inside of the pre-polymerization reactor 10 is provided with pre-polymerization micro-bubbles for dispersing broken materials into micro-bubbles. Interface generator 101, the propylene delivery pipeline passes through the wall surface of described prepolymerization reactor 10 and connects described prepolymerization microinterface generator 101, in order to pass propylene into the inside of described prepolymerization microinterface generator; The reactor 20 is provided with a micro-interface generating unit for dispersing the crushed material into micro-bubbles.

[0077] It should be emphasized that the micro-interface generator set includes a first micro-interface generator 201 and a second micro-interface generator 202, the first micro-interface generator 201 is arranged o...

technical field

[0001] The invention relates to the technical field of preparing polypropylene, in particular to a micro-interface strengthening reaction system and method for preparing polypropylene. Background technique

[0002] Polypropylene is a thermoplastic synthetic resin with excellent performance, which is a colorless and translucent thermoplastic lightweight general-purpose plastic. With chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high wear-resistant processing properties, etc., polypropylene has been rapidly used in machinery, automobiles, electronic appliances, construction, textiles, and packaging since its inception. It has been widely developed and applied in many fields such as agriculture, forestry, fishery and food industry. In recent years, with the rapid development of my country's packaging, electronics, automobile and other industries, it has greatly promoted the development of my country's ...

Examples

Embodiment

[0076] refer to figure 1 Shown is the enhanced reaction system for preparing polypropylene of the present invention, which includes a pre-polymerization reactor 10 and a polymerization reactor 20, and the inside of the pre-polymerization reactor 10 is provided with pre-polymerization micro-bubbles for dispersing broken materials into micro-bubbles. Interface generator 101, the propylene delivery pipeline passes through the wall surface of described prepolymerization reactor 10 and connects described prepolymerization microinterface generator 101, in order to pass propylene into the inside of described prepolymerization microinterface generator; The reactor 20 is provided with a micro-interface generating unit for dispersing the crushed material into micro-bubbles.

[0077] It should be emphasized that the micro-interface generator set includes a first micro-interface generator 201 and a second micro-interface generator 202, the first micro-interface generator 201 is arranged o...

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