Synthesis technology of cobalt manganese binary liquid catalyst

Abstract

The invention is a synthesis technology of cobalt manganese binary liquid catalyst, comprising the steps of batching, synthesis, impurity removal, settlement and encapsulation to obtain the cobalt manganese binary liquid catalyst with the mol ratio of the cobalt manganese content being 4.6-11. The cobalt manganese binary liquid catalyst has high activity, reliable quality and good stability, the technical and quality index thereof is lower than that of solid index and is convenient in use. The cobalt manganese binary liquid catalyst provided by the invention can reduce the preparing procedure of using the solid catalyst, save labor cost, eliminate safety potential such as pipeline blocking, instability and the like caused by impurities in the preparation process of the solid catalyst and lower unit consumption of raw and auxiliary materials, and is beneficial for lowering use cost and improving economic benefit.

Description

technical field [0001] The invention relates to a synthesis process of a liquid catalyst, in particular to a synthesis process of a cobalt-manganese binary liquid catalyst. Background technique [0002] At present, in the production process of the existing PTA (purified terephthalic acid), what the oxidation unit selects are cobalt acetate and manganese acetate solid catalysts. Depending on the process, the ratio is also different, but no matter what ratio is adopted, it is trying to improve the activity of the catalyst and reduce the consumption of raw and auxiliary materials, so as to reduce costs and increase efficiency. At present, the cobalt acetate and manganese acetate solid catalysts commonly used in the oxidation unit of PTA plants in China are prone to agglomeration during storage, and impurities are easily mixed in the preparation process, resulting in ground loss, insufficient dissolution, and the impurities that are brought in are easy to block the pipeline. Th...

AI Technical Summary

Problems solved by technology

At present, the cobalt acetate and manganese acetate solid catalysts commonly used in the oxidation unit of PTA plants in China are prone to agglomeration during storage, and impurities are easily mixed in the preparation process, resulting in loss on the ground, insufficient dissolution, and the impurities brought in are easy to block the pipeline and cause damage to the catalyst. The production process poses safety hazards

At the same time, the atomic weight ratio of the solid catalyst is not easy to control during the artificial preparation process, so that the activity of the catalyst cannot reach the best state, which affects the oxidation reaction speed to a certain extent, increases the PX, acetic acid combustion loss, and reduces the comprehensive economy of the PTA device. benefit