A method for producing nano-zinc phosphate by negative pressure ultrasonic method and nano-zinc phosphate

Abstract

The invention discloses a method for producing nano zinc phosphate by a negative-pressure ultrasonic method and nano zinc phosphate. The method comprises the following steps of: 1) obtaining basic zinc carbonate with a grain size of 50-100nm, and preparing the basic zinc carbonate into emulsion with zinc ion concentration of 2.1-2.4mol / L; preparing a phosphoric acid solution with concentration of 2.8-3.2mol / L; 2) under stirring, mixing basic zinc carbonate emulsion with the phosphoric acid solution to obtain a reaction solution, enabling the reaction solution to react for 5-10 minutes in a micro reactor, then, enabling the reaction solution to react for 10-15 minutes under a continuously ultrasonic state, and completing the reaction when the pH value of the reaction solution rises to 5.6-5.8, wherein the reaction temperature of the reaction solution is 54-60 DEG C, and the reaction pressure of the reaction solution is -66.3 to -76.3 kpaG; and 3) carrying out solid-liquid separation on the reaction solution which is reacted, drying obtained solids, and carrying out air separation and classification on the obtained solids to obtain nano zinc phosphate. The nano zinc phosphate prepared by the method disclosed by the invention is small in grain size, great in specific surface area, excellent in dispersion and good in rust-proof effect.

Description

technical field [0001] The invention relates to a method for producing nano-zinc phosphate by a negative pressure ultrasonic method and the nano-zinc phosphate, belonging to the field of chemical materials. Background technique [0002] As the society has higher and higher requirements for environmental protection, the two-type requirement for chemical materials is an increasingly clear trend. Environmental protection and anti-corrosion work for automobile bodies, home appliances, ships, containers, roads, bridges, outdoor steel frame structures, workshops, ports, electromechanical equipment, etc. are becoming more and more important. Heavy metal anti-rust pigments are gradually being eliminated. Zinc phosphate is a green, environmentally friendly It is an important type of anti-rust pigment, which is gradually being widely recognized and used. However, because the zinc phosphate produced by the existing production process cannot completely replace the toxic anti-rust pigme...

AI Technical Summary

Problems solved by technology

However, because the zinc phosphate produced by the existing production process cannot completely replace the toxic anti-rust pigments such as red lead and zinc chrome yellow, especially in water-based paints, the effect is not very satisfactory. Follow-up studies have found that this is mainly It is due to the poor activity and hydrolysis of zinc phosphate, resulting in slow and insufficient antirust effect of zinc phosphate

[0003] In the application of target materials and optoelectronic materials, the doping process of micron-sized zinc phosphate is complicated. Mechanical grinding will not only bring in unnecessary impurities, but also cause incomplete external grains, long operation time, and low pass rate. high energy consumption

Images