Impurity is an important factor affecting the stability of hydrogen peroxide. Many of divalent metal ions such as iron ions, divalent manganese ions, cupric ions, trivalent chromium ions will promote the decomposition of hydrogen peroxide. Since the industrial composition contains a large amount of metal ions of hydrogen peroxide and the like substances, so, in the industrial-grade hydrogen peroxide production process, usually by adding a large amount of stabilizer in hydrogen peroxide to suppress catalytic impurities. Hydrogen peroxide and a laboratory system of law: in 100ml15-18% sulfuric acid under ice cooling, barium peroxide is added gradually added in an amount to maintain the solution acidic degrees (about 40g). Upper solution was decanted to obtain a hydrogen peroxide solution. If necessary, it can be extracted. Extracted 4-5 times with each 20ml. The ether extract was placed in evaporator (not higher than 40 ℃) to remove the ether, the use of hydrogen peroxide, sulfuric acid and the residue was moved to protect dry flask on a water bath. This method can be obtained 50 percent hydrogen peroxide solution. Two: 90g of sodium peroxide in small portions under vigorous stirring added cooling with ice water 800ml20% of sulfuric acid, hydrogen peroxide, shall be maintained at a temperature no higher than 15 ℃. 12 hours, Henan hydrogen peroxide manufacturers, filtered precipitated sodium sulfate decahydrate crystals. The filtrate was placed in a vacuum apparatus ground joint (5-10mm), at a bath temperature of 60-65 degrees Celsius (in the last 85 ℃) subjected to distillation under distillation amount of each of 100ml. Receptacle with two series (the second by the application of ice) collecting distillate, the first product in a receptacle containing hydrogen peroxide content higher than 20% hydrogen peroxide solution vendors, the second receptacle containing 3% hydrogen peroxide. The resulting hydrogen peroxide solution was further concentrated in concentrated sulfuric acid in a vacuum desiccator at room temperature, after three days to 25% of the solution was concentrated to 88%. A dilute solution of hydrogen peroxide can also be used to freeze water condensation method to achieve enrichment purposes. Hydrogen peroxide, hydrogen peroxide manufacturers _ _ Henan Zhengzhou Longda Chemical (certified merchants) are provided by Zhengzhou Longda Chemical Products Co., Road Zhiyuan, temper forward. Zhengzhou Longda Chemical Products Co., Ltd. (www.longdahuagong.com/) aims to become and you win symbiosis, strategic partners to move forward, more determined to become the most influential of inorganic acid companies, and you leap together to success !