Metallurgy / Chemicals / Rubber & Plastics

On July 17, Zhongke Refinery's 200,000 tons/year polypropylene plant successfully produced special materials for automobile bumpers for the first time, which further met the needs of downstream high-end customers. This product is an impact-resistant copolymer product with high impact strength and moderate rigidity at low temperature. It is a special material for automobile bumpers. The demand is large, the economic benefits are considerable, and the market prospect is broad.

This product has a high ethylene content and is difficult to produce continuously, especially for the impact reaction system. Zhongke Refinery continues to collect feedback information from downstream customers, and continues to further finalize the performance of anti-impact copolymer series products. Under the guidance of experts from Beihua Institute, it upgrades and optimizes the additive system of similar products at home and abroad; it gives full play to the role of model worker studios and actively coordinates Coordinate, carefully formulate trial production plans, repeatedly scrutinize additive formulas and production parameters, and refine and improve the brand switching instruction list; evaluate the operational risks that may occur in the production process, formulate emergency measures, and organize team learning in advance to ensure smooth completion Production tasks.

This conversion is also the first time that the device uses a new catalyst, which has higher reactivity and is difficult to control. The internal operation carefully monitors the disk, pays close attention to the opening of the chilled water valve of the prepolymerization reactor, and adjusts the amount of catalyst in time to avoid overheating of the reaction. At the same time, by controlling the circulating air volume of the compressor, the fluidity of the polymer powder is ensured. In view of the challenges of higher ethylene addition amount and difficult control of pressure and material level, the internal operation accurately controls the reaction balance of the two reactors to ensure that the material level is controllable; finely adjusts the ethylene feed amount, ethylene propylene ratio, hydrogen and feed levels. Key parameters such as electron concentration, improve product performance, shorten switching cycle, and ensure product quality. The external operation inspects and monitors the whole process, pays close attention to the appearance of the pellets, and conducts sampling and analysis in time to ensure that the product quality is controllable and stable.