Coal water slurry additive containing phosphate groups and preparation method thereof

Abstract

The invention provides a coal water slurry additive containing phosphate groups and a preparation method thereof. The preparation method comprises the steps of (1) crushing asparagus into powder, adding water, mixing well, stirring, gelatinizing under microwave radiation power of 250-550 W for 3-8 min, and cooling to room temperature; (2) adding the gelatinized asparagus into a reactor, adding aninorganic base, vinylphosphonic acid and vinylphosphonate, enabling stirring, heating to 85-110 DEG C, and dropwise adding an initiator solution having a mass concentration of 1-10% for 3-5 hours at controlled temperature of 90-100 DEG C, wherein the initiator solution is prepared with an initiator and part of the water; (3) after dropwise adding, allowing continued reaction at the maintained temperature for 1-4 hours, cooling, and discharging to obtain the coal water slurry additive.

Description

technical field [0001] The invention belongs to the field of fine chemical industry, in particular to a coal-water slurry additive containing phosphoric acid groups and a preparation method thereof. Background technique [0002] The main problem that restricts the popularization of coal water slurry technology at present. The first is the special demand for coal types. There are corresponding restrictions on the types of coal suitable for pulping operations, mainly medium and high-grade metamorphic coal. With the further expansion of this technology, the demand for coal resources increases, and the medium and high-rank coals are also facing increasing pressure as the main pulping coals. Low-rank coal in my country's coal resources has the advantages of abundant reserves and low prices. The western region of my country is mainly low-rank coal, namely "three low" and "two high". The former represents low sulfur, ash and phosphorus; The latter represents high volatile content ...

AI Technical Summary

Problems solved by technology

Low-rank coal in my country's coal resources has the advantages of abundant reserves and low prices. The western region of my country is mainly low-rank coal, namely "three low" and "two high". The former represents low sulfur, ash and phosphorus; The latter represents high volatile content and calorific value, but this coal type has disadvantages such as low slurry concentration and poor slurry performance, which provides technical difficulties for pulping, and technical breakthroughs are awaited, with great development potential

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