Industrial production method
Alkaline hydrogen peroxide production method: quinone-containing air electrodes are used to produce alkaline hydrogen peroxide. It is characterized in that each pair of electrodes consists of an anode plate, a plastic mesh, It consists of a cationic diaphragm and a quinone-containing air cathode. There is a distribution chamber for the incoming fluid and a collection chamber for the discharged fluid at the upper and lower ends of the electrode working area. There is a throttling hole at the fluid inlet. The multi-component electrode uses a limited coupler. In the pole series connection method, the plastic hose used for the inlet and outlet of the anode circulating alkaline water is lengthened and then connected to the liquid collection main pipe. The multi-component electrode group is assembled from the unit plate.
Phosphoric acid neutralization method: It is characterized in that it is prepared from sodium peroxide aqueous solution using the following steps:
⑴ Use phosphoric acid or sodium dihydrogen phosphate NaH2PO4 to neutralize the sodium hydroxide solution to pH 8.0~8.7 produces an aqueous solution of NaH2PO4 and H2O2.
⑵ The aqueous solution of Na2HPO4 and H2O2 is cooled to 5~-5℃, so that most of the NaH2PO4 is precipitated in the form of NaH2PO4·110H2O hydrate.
⑶ Separate the mixture containing NaH2PO4 ·10H2O hydrate and hydrogen peroxide aqueous solution in a centrifugal separator, so that the NaH2PO4 ·110H2O crystals are separated from the aqueous solution containing a small amount of NaH2PO4 and hydrogen peroxide.
⑷ Evaporate the aqueous solution containing a small amount of NaH2PO4 and hydrogen peroxide in the evaporator to obtain steam containing H2O2 and H2O, while the concentrated salt solution of NaH2PO4 containing hydrogen peroxide flows out from the bottom and returns Neutralizing tank.
⑸ The steam containing H2O2 and H2O is fractionated under reduced pressure in a fractionating tower to obtain about 30H2O2 product.
Electrolytic sulfuric acid method: electrolyze 60% sulfuric acid to obtain peroxydisulfuric acid, and then hydrolyze it to obtain hydrogen peroxide with a concentration of 95%.
2-Ethylanthraquinone method: The main method for industrial-scale production is the 2-ethylanthraquinone (EAQ) method. 2-Ethylhydroanthraquinone reacts with hydrogen under the action of a catalyst at a certain temperature and pressure to form 2-ethylhydroanthraquinone, and 2-ethylhydroanthraquinone undergoes an oxidation-reduction reaction with oxygen at a certain temperature and pressure, and 2-ethylhydrogen Anthraquinone is reduced to generate 2-ethylanthraquinone and hydrogen peroxide is generated at the same time, and then extracted to obtain a hydrogen peroxide aqueous solution. Finally, a qualified hydrogen peroxide aqueous solution is obtained through heavy aromatic purification, commonly known as hydrogen peroxide. This process is mostly used to prepare 27.5 hydrogen peroxide. , hydrogen peroxide aqueous solutions with higher concentrations (such as 35, 50 hydrogen peroxide) can be obtained through distillation.
The chemical formula of hydrogen peroxide is H2O2. Pure hydrogen peroxide is a light blue viscous liquid that can be mixed with water in any proportion. It is a strong oxidant. The aqueous solution is commonly known as hydrogen peroxide and is a colorless and transparent liquid. Its aqueous solution is suitable for medical wound disinfection, environmental disinfection and food disinfection. Under normal circumstances, it will decompose into water and oxygen, but the decomposition rate is extremely slow. The way to speed up the reaction is to add a catalyst - manganese dioxide, etc. or to irradiate it with short-wave rays.