New Flame Retardant Low synthetic hydrated zinc borate

Zinc borate in industry are mainly three kinds of synthetic routes:
① zinc hydroxide - boric acid method, this method produced a single, high production costs;
② zinc oxide - borate method, this process is simple, single product, suitable for small batch production;
③ zinc - borax method, using borax and inexpensive zinc, lower cost [1]. This test uses a zinc salt - the production of zinc borate borax.
Synthesis method:
1 Experimental Drugs and Drug instrument: zinc nitrate hexahydrate, borax decahydrate, zinc oxide, mannitol were of analytical grade. Instrument: three flasks, electric stirring device, thermostatic water bath, circulating water pumps, oven, thermometer, pH value tester
Two experimental principle zinc nitrate and borax by the metathesis reaction of zinc borate flame retardant reaction equation can be expressed as: 3.5 Zn (NO3) 2 +3 · 5Na2B4O7 +0 · 5ZnO +10 H2O 2 (2ZnO · 3B2O3 · 3.5 H2O) +2 H3BO3 + 7NaNO3 main factors affecting product composition had an anti-

Should be temperature, reactant ratio of liquid to solid ratio and reaction time. Studied the influence of these factors on the product, so as to determine the optimum process conditions.
3 product specifications and test methods to quantify Zn (NO3) 2.6 H2O dissolved in quantitative water bath temperature when the temperature rose to a certain