Calcium peroxide preparation method

Abstract

The invention discloses a calcium peroxide preparation method. The method is characterized in that the method mainly comprises the following steps: 1, adding a certain amount of water into a heat insulation reactor, and starting stirring; 2, preparing a hydrogen peroxide mixed solution with a stabilizer triethanolamine; 3, adding a stabilizer sodium tripolyphosphate into calcium hydroxide powder until the sodium tripolyphosphate content accounts for 0.05-10% of the mass of calcium peroxide; 4, simultaneously adding the prepared hydrogen peroxide mixed solution and the calcium hydroxide powder into the heat insulation reactor according to a molar ratio of hydrogen peroxide to calcium hydroxide of 1.18-1.29:1, maintaining the reaction temperature in a range of 20-30DEG C, and reacting for 10-30min; 5, carrying out pumping filtration of reaction materials, and drying to obtain finished calcium peroxide powder; and 6, carrying out processes of step 1 to step 4 on a mother liquor obtained after the pumping filtration to prepare calcium peroxide. The method has the advantages of environmental protection, no sewage, small equipment investment, simple technology, and realization of the preparation of high-content calcium peroxide products at normal temperature.

Description

technical field [0001] The invention belongs to the field of inorganic chemical industry, in particular to a preparation method of calcium peroxide. Background technique [0002] Calcium peroxide, chemical formula CaO 2 . It is an important inorganic chemical product, white to light yellow, odorless, almost tasteless powder crystals or granules, insoluble in water, ethanol, ether, acetone and other solvents. Calcium peroxide is stable at room temperature, and it begins to decompose when heated to about 300°C, and the complete decomposition temperature is 400-425°C. Calcium peroxide meets acid to generate hydrogen peroxide, which slowly releases oxygen in water and humid air. [0003] Because calcium peroxide has the above characteristics, it can be used as a fungicide, preservative, leavening agent, oil bleaching agent and quick-drying agent for sealing mud. Used as an additive in the production of food, toothpaste, cosmetics, etc. In agriculture, it is used as a non-to...

AI Technical Summary

Problems solved by technology

[0005]The advantages of the calcium chloride method and the traditional calcium hydroxide method are that the process and equipment are relatively simple, the technology is relatively mature, and they are suitable for small-scale production; the common disadvantage is the use of Dilute solution, the content of CaO2 cannot be very high, and the content of CaO2 is generally only 50% to 60%