A few days ago, a thank-you letter from the US SD company was passed from the other side of the ocean to Jilin Petrochemical Ethylene Glycol Plant. The letter was congratulated and appreciated by the SD company on the technical progress of the plant's technicians in improving catalyst selectivity. 300 Catalyst -8 achieved 87% selectivity at Jilin Petrochemical's ethylene glycol plant, setting a new record for SD Company's 300-8 catalyst.

In September of this year, Jilin Petrochemical's ethylene glycol plant was the first company in the country to quote the US SD company's 300-8 catalyst. According to the contract, the catalyst's selective guarantee value was 84.7%. However, after the device was driven, the SD300-8 selectivity remained at 82%.

To solve this problem, the ethylene glycol plant set up a research team. Since the US SD company has no ready-made information and operating experience to refer to, technical personnel can only “touch the river”. Through comparative analysis, they found that the amount of reactor inhibitor added is the key to the selectivity of the catalyst. So they tried to change the amount of inhibitors added. At the same time, the catalyst selectivity and inhibitor addition amount were compared and analyzed, and with the adjustment of other parameters, the selectivity of the catalyst began to rise and finally stabilized at 84.96%. Foreign experts were very satisfied with the results. .

After the appraisal was over, the ethylene glycol plant did not meet this result and began to explore ways to increase the selectivity of the catalyst. Finally, the optimum operating point for the amount of inhibitor added and the catalyst selectivity was finally found so that the catalyst selectivity reached and remained at 87%. SD company experts were amazed by this data during the return visit. By increasing the selectivity of the catalyst, the ethylene consumption of ethylene glycol plant equipment has dropped drastically, and the output has also hit a record high. The increase in production efficiency for one year alone has reached nearly ten million yuan.

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