Potassium ferrate disinfectant and preparation method thereof

Abstract

The invention provides a potassium ferrate disinfectant and a preparation method of the potassium ferrate disinfectant, and relates to the technical field of a disinfectant, wherein the potassium ferrate disinfectant consists of raw material components with a certain quantity such as sodium hydroxide, potassium hydroxide, ferric iron and chlorine. The preparation method comprises the following steps of: leading 40% sodium hydroxide solution to have reaction with the chlorine to generate sodium hypochlorite, when the reaction stops, adding the sodium hydroxide, to prepare saturated sodium hypochlorite, and filtering for later use; leading the saturated sodium hypochlorite to have reaction with the ferric iron to generate sodium ferrate; carrying out replacement reaction between the potassium hydroxide and the sodium ferrate, and filtering to obtain a potassium ferrate crude product; washing the potassium ferrate crude product by absolute ethyl alcohol to obtain a potassium ferrate refined product, and drying at low temperature in a leaching way to obtain the dried potassium ferrate refined product. According to the invention, the chlorine is charged into the sodium hydroxide to prepare the sodium hypochlorite firstly, the sodium ferrate can be further prepared, and the potassium hydroxide is used for replacing to generate the potassium ferrate, so that the potassium hydroxide can be saved by 30%-40%, and the cost can be reduced by 25%-30%, and the more than 98% potassium ferrate refined product can be continuously and stably produced due to the proportioning of the raw materials.

Description

technical field [0001] The invention relates to the technical field of disinfectants, in particular to a potassium ferrate disinfectant and a preparation method thereof. Background technique [0002] Potassium ferrate is an excellent oxidant with high-efficiency disinfection, and is a new type of non-chlorine high-efficiency disinfectant. Mainly used for drinking water treatment. In chemical production, it is used as an oxidizing agent for sulfonic acid, nitrite, ferrocyanide and other inorganic substances. It is used to remove manganese, antimony and arsenic in zinc smelting. It is used in cigarette filters in the tobacco industry. Potassium ferrate pure product is a dark purple shiny powder, stable in dry air below 198 °C, easily soluble in water to form a light purple solution, after standing still, it will decompose to release oxygen, and precipitate hydrated ferric oxide (i.e. iron oxide). The alkalinity of the solution increases with decomposition, and it is quite s...

AI Technical Summary

Problems solved by technology

The traditional hypochlorite oxidation method can be divided into two types: one is the indirect method, that is, sodium ferrate is first obtained, and then replaced with potassium hydroxide to obtain potassium ferrate. This method is cumbersome to operate and the product yield is partial Low; Another method is the direct method, which directly produces potassium ferrate. This method is an improved process of the indirect method, which simplifies the operation steps and correspondingly improves the product yield, but this method will increase the production cost.

At the same time, these two methods are costly due to the use of a large amount of potassium hydroxide or sodium hydroxide and cannot be effectively recovered, and will cause pollution to equipment and the environment

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