Degassing process of high density polyethylene

Abstract

The invention provides a degassing technology capable of effectively removing the odor of high density polyethylene (HDPE). The polyethylene (PE) material particles with a certain particle size are steamed and inactivated by low-pressure steam in a steamer, are fluidized and dried by hot nitrogen in a fluidized drier, and are added with an auxiliary and the like to achieve the purposes of inactivating a catalyst, removing a catalyst oxide and effectively reducing volatile matters, so that the technology provided by the invention thoroughly solves the problem of the odor of a product, and remarkably improves the product quality.

Description

technical field [0001] The invention relates to a novel high-density polyethylene production technology, in particular to a high-density polyethylene degassing technology. Background technique [0002] Polyethylene (PE) is the most important downstream product of ethylene, and it is a thermoplastic resin obtained by polymerization of ethylene. Polyethylene accounts for 70% of the world's polyolefin consumption and 44% of the total consumption of thermoplastic general-purpose plastics. Polyethylene is basically divided into three categories, namely low-density polyethylene (LDPE), high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE). At present, there is still a big gap between my country's polyethylene production and foreign countries. On the one hand, the scale of domestic installations is relatively small, and the material consumption and energy consumption are high; on the other hand, there are relatively few varieties in the product structure, e...

AI Technical Summary

Problems solved by technology

But the main problem that exists in the prior art is that product has bigger smell, through test and analysis, it is found that smell is mainly caused by residual volatile matter and catalyst oxide volatilization in product, and concentration has about 0.3% (3000ppm )

Images