Powder product of high performance hydroxamated polymer and preparation method thereof

Abstract

The invention provides a powder product of a high performance hydroxamated polymer and a preparation method thereof and belongs to the technical field of preparation of an alumina red mud sedimentation separating agent. The preparation method comprises preparing polymers with different hydroxamic acid contents and network structures through a highly efficient and stable system and a two-step reversed-phase suspension polymerization process and carrying out vacuum distillation deoiling, dehydration and drying to obtain the high performance hydroxamated polymer powder. Through adjustment of processes, the polymer powder products with different molecular weights and different hydroxamic acid contents can be prepared and the molecular weight of the product is 9.9 to 14 million. The product prepared by the method has a more stretched network structure, enhances the capturing performance, and can be used as a separating agent to improve the capturing ability of the suspended particles in thealumina slurry. The technology fills the technical blank of the powdered hydroxamic acid polymer product, solves the problems of short storage time and high transportation cost of the original emulsion product, and has great practicability.

Description

technical field [0001] The invention relates to a high-performance hydroxamated polymer powder product and a preparation method thereof, and belongs to the technical field of preparation of alumina red mud sedimentation and separation agents. Background technique [0002] Red mud is an industrial waste formed during the production of alumina. It has high alkali content, poor fluidity, small particle size, easy scarring, and small density difference between liquid and solid particles. With the rapid development of the domestic alumina production industry, the separation of red mud has gradually become a bottleneck in the alumina production process, which greatly limits the development of my country's alumina production industry. In the alumina production process, in order to obtain pure sodium aluminate solution that can meet the production requirements, the sedimentation and separation of red mud is an indispensable process in the alumina production process. At present, the...

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Problems solved by technology

At present, the domestic alumina industry generally uses products such as copolymers of acrylamide and sodium acrylate in the separation of red mud, mainly hydrosol, dry powder and inverse emulsion. Due to process limitations, the product viscosity is low, and only There are two groups of carboxyl and amino groups, which lead to a large amount of addition, unstable flocculation effect, poor ability to capture some small particles in the red mud slurry, high content of floating matter in the supernatant, and unsatisfactory use effect. Hydroxamic acid on the market The modified products are basically inverse emulsion type, there is no powder type modified product, the storage time of the emulsion type product is very limited, generally only half a year can be stored, the transportation cost of the emulsion product is much higher than that of the powder product