Preparation hydrazine sulfate
First, prepare a solution of sodium hypochlorite. In the flask, measure out 350 ml of water and while stirring add 20 g NaOH. The solution is cooled to 0 ° C and the Bank to build a larger container with ice and salt (coolant). After introducing chlorine into the solution, which will make the permanganate and dilute hydrochloric acid. Check the temperature that did not exceed 2 ° C, as it would in large quantities began to emerge chlorate. After cooled down solution at 0 ° C and add 25 ml 50% NaOH solution and 15 g urea dissolved in 20 ml water. The reaction mixture stir and leave about 1 hour to respond. After mixture poured into a larger container, add 25 ml 10% gelatin and slowly heat the water bath. After thirty minutes the solution is evaporated to 250-300 ml, filtered and the filtrate excluded gelatin for cooling přikapáváme 40 ml of concentrated sulfuric acid. Then pour the mixture into sealable bottle and let cool gel. The precipitated crystals are filtered at room temperature and dry it.
2NaOH + Cl2 --> NaClO + NaCl + H2O
CO(NH2)2 + NaClO --> NaCl + CO2 + N2H4
N2H4 + H2SO4 --> N2H6SO4