Please select the most similar patent number from A, B, C and D. Which number is?
A preparation apparatus for preparing an aqueous solution including a chlorine dioxide gas. The aqueous solution comprises magnetized water and the chlorine dioxide gas. The preparation apparatus comprises an electrolyte device (1) used to produce the chlorine dioxide gas; a magnetizing device (3) used to magnetize water to form the magnetized water; and a mixing device (2) used to mix the chlorine dioxide gas and one of the water and the magnetized water. The preparation apparatus can prepare the aqueous solution including the chlorine dioxide gas and having favorable sterilization and storage durations.
A: The present invention relates to a method for catalytically oxidizing hydrogen chloride to prepare chlorine gas, and specifically relates to the method: chlorine gas is prepared by means of single injection of hydrogen chloride and multi-stage injection of oxygen, and/or single injection of oxygen and multi-stage injection of hydrogen chloride, the product gas stream being returned without being separated, and optional means of insulation. The present invention does not cause the heat of reaction to be excessively concentrated, and therefore is a commercially viable method for Deacon catalytic oxidation of hydrogen chloride to recover chlorine gas.
B: Provided is a method for preparing high-purity chlorine dioxide using a combination of methyl alcohol and hydrogen peroxide as a reducing agent. The method comprises: injecting concentrated sulfuric acid and sodium chlorate solution into a generator to form a reaction mother solution, making the reaction mother solution maintain an acidity of 5.8-6.2N, a sodium chlorate content of 234-266 g/L and a temperature of 69-73℃; then adding a reducing agent from the combination of methyl alcohol and hydrogen peroxide for reaction to generate chlorine dioxide gas and by-product neutral mirabilite; and cooling the chlorine dioxide gas generated by reaction and then absorbing same with chilled water of 4-10℃ to obtain a chlorine dioxide aqueous solution, and at the same time, filtering, washing and recycling the by-product neutral mirabilite. Compared with only using methyl alcohol as a reducing agent, the method can reduce the chlorine gas content in chlorine dioxide by 60-70%, and can reduce the sulfuric acid consumption by 14-20%; besides, the generated by-product is neutral mirabilite, needing no neutralization treatment for acidic mirabilite.
C: An externally used solution containing chlorine dioxide for promoting hair growth is composed of chlorine dioxide or its precursor, pH regulator, medical solvent and plant extract according to certain weight ratio. The product may take the forms of a single solution containing chlorine dioxide or several solutions comprising chlorine dioxide precursor. The safety and efficient oxidation sterilization and tissue regeneration ability of chlorine dioxide are introduced into the solution system for promoting hair growth, and the steps of removing hair loss factors, stimulating the growth of hair follicles, anti-inflammatory and anti-dandruff are done synchronously. Complemented Medical solvent and plant extracts, change alopecia environment.
D: A gas-liquid mixing device, comprising a housing (1), an air bubble generator (3) provided therein, and a magnet (2) provided between the air bubble generator (3) and the housing (1). The magnet (2) covering of the air bubble generator (3) magnetizes a water body, thus changing a molecular structure of the water body. Magnetization and mixing are simultaneously carried out, thus improving a gas dissolution rate.
Answer: D