Nitrogen-phosphorus high-efficient expansion type wood flame-proof agent and its preparation method

Abstract

The present invention discloses a phosphorus-nitrogen high-efficiency expansion wood fire retardant; urea phosphate crystallization mother liquor is taken as the raw material and Fe, Mg, Ca, A1 metalion activating agent and boric acid are added and mixed evenly; and then the solution is put into a decompression distilling device for decompression distillation for 1.5 to 2 hours with a temperatureof 80 to 90 Celsius degrees after water bath heating; the water content of mother liquor at then is less than 8 percent; the crystallization mother liquor after water removal is put into a polymerizing-kettle which is equipped with an electric mixer; the electric mixer and heating switch are switched on for heating at a speed of 4 to 6 Celsius degrees per minute and the rotation speed of the electric mixer is adjuted at 150 rpm which is comparatively low. Two gases of ammonia and carbon dioxide are input through a gas steel cylinder; the pressure of ammonia is 0.4 to 0.7 MPa and the carbon dioxide pressure is 0.3 to 0.6 MPa in the process of inputting the gases; the total pressure in the kettle is kept at 1.2 to 1.4 MPa; when the reaction temperature reaches 160 to 229 Celsius degrees, the reaction temperature is kept for 1.5 to 2 hours and the temperature of the reaction product is reduced to the normal temperature; the reaction product is crushed to fire retardant powder. The present invention boasts of simple process, easy industrialization, low cost, low investment, short treatment cycle, rational phosphorus-nitrogen proportion and excellent synergetic fire retardant effect; in addition, the present invention is clean without pollution.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a nitrogen-phosphorus high-efficiency expansion type wood flame retardant and a preparation process thereof. Background technique [0002] With the rapid development of the national economy and the continuous improvement of people's living standards, the proportion of total wood consumption for building decoration is increasing year by year. However, untreated wood and its products are flammable materials. According to the analysis of fire statistics, among the fire accidents in various countries in the world, building fires account for the first place, and 21% of building fires are related to fibers such as wood and fabrics. According to the statistical analysis of relevant departments, although the causes of the fire are different, the expansion of the fire and the casualties are directly related to the combustible and combustible materials such as wood materials u...

AI Technical Summary

Problems solved by technology

The current treatment method of the mother liquor is to send it to the fertilizer system for recycling, and the active ingredients in it cannot be fully utilized