Method and apparatus for preparing microsphere silicon dioxide carrier on gas-phase fluidized bed by polyvinyls catalyst

Abstract

Production and apparatus for microspheroidal silica carrier of gas-phase fluidized bed vinyl polymerization catalyst are disclosed. The process is carried out by adding modified sol into colloid mill, adding urea to treat, 3~20mins later, spray drying atomized disk on top, mixing with 300~400DEG C hot air from tangent inlet on top of spray drier, high-speed rotating downward, and putting it with microspheroidal silica from outlet on bottom of one-stage cyclone separator and spray drier into calciner for 1.5-2.0hrs to obtain final product. The granularity distribution is d50 30.15~48.59um, d10 9.23~214.97um, d9052.37~75.59um, packing density is 0.29~0.32g / ml, specific area is 297.2~310.2m2 / g,pore volume is 1.57~1.64ml / g and average aperture is 200+-20.

Description

technical field

[0001] The invention relates to a preparation method and equipment for ethylene polymerization, ethylene and alpha olefin copolymerization catalyst carrier, in particular to a preparation method and equipment for gas-phase fluidized bed ethylene polymerization catalyst microspherical silica carrier. Background technique

[0002] Ethylene is the main representative product of petrochemical industry. The production and application of ethylene products is an important measure to measure the petrochemical development level of a country and region. Polyethylene is the most important downstream derivative of ethylene, accounting for about 70% of the world's total ethylene.

[0003] The catalyst made of micro-spherical silica as a carrier has been widely used in the production of linear low-density polyethylene (LLDPE) by fluidized bed reaction and the production of high-density polyethylene (HDPE) by fluidized bed reaction. 30% of total polyethylene production. ...

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