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 is dried and evaporated on a water bath (not higher than 40 ℃) to remove the ether of hydrogen peroxide, sulfuric acid and the residue was moved to protect dry bottle. 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% sulfuric acid, the temperature should be kept no higher than 15 ℃. For 12 hours, filtered off the 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 ℃) was distilled under considerations hydrogen peroxide, the amount of each was distilled 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%, the second receptacle containing hydrogen peroxide 3 % the following. 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. Electrolyzed sulfuric acid method: using electrolysis 60% sulfuric acid, to give over two sulfuric acid, and then hydrolyzed to give a concentration of 95% hydrogen peroxide. 2-ethyl anthraquinone method: Industrial-scale production is the main method of 2-ethyl anthraquinone (EAQ) method. 2-ethyl anthraquinone at certain temperature and pressure in the catalyst and hydrogen produced by the reaction of hydrogen 2-ethyl anthraquinone, 2-ethyl anthraquinone hydrogen at a temperature and pressure oxidation and oxygen reduction reaction of hydrogen peroxide oxidation, 2- Hydrogen reduction of ethyl anthraquinone, 2-ethyl anthraquinone generated while generating hydrogen peroxide, obtained after extraction of hydrogen peroxide solution, and finally get through the heavy aromatics purification of aqueous hydrogen peroxide qualified physical properties of hydrogen peroxide, commonly known as hydrogen peroxide, this process is most It used to prepare a 27.5% hydrogen peroxide, higher concentrations of hydrogen peroxide solution (e.g. 35%, 50% hydrogen peroxide) can be obtained by distillation. Hydrogen peroxide color | Zhengzhou Longda Chemical | Central Plains area of ??hydrogen peroxide is provided by Zhengzhou Longda Chemical Products Limited. "Sodium hydroxide (caustic soda, liquid, flake, solid), sodium hypochlorite, hydrochloric acid, sulfuric acid, nitric" preferred Zhengzhou Longda Chemical Products Co., Ltd. (www.longdahuagong.com/), the company is located: Zhengzhou City, Henan Province High-tech Zone Chemical Road 99 (Chemical Road and Rita Road intersection 100 meters south west), over the years, Zhengzhou Longda Chemical to provide customers with the best quality of service, Contact: Manager Xu. Welcome to the new and old customers call, letter, visit the guide, business negotiations. Zhengzhou Longda Chemical expect to be your long-term partner!