Visual formaldehyde scavenger and preparation method thereof

Abstract

A visual formaldehyde scavenger and a preparation method thereof belong to the technical field of formaldehyde clearance. The visual formaldehyde scavenger is prepared from the raw materials including, by weight part, 8-120 parts of water, 1-120 parts of formaldehyde treatment agent, 0.00005-1 part of indicator, 0-1 parts of pH regulator and 0-2 parts of additives, wherein the formaldehyde treatment agent is used for reacting with formaldehyde and reducing the pH of the visual formaldehyde scavenger; the indicator is used for displaying color change when the pH of the visual formaldehyde scavenger is reduced to be lower than a target pH. The formaldehyde clearing effects of the visual formaldehyde scavenger can be visualized by the color change displayed along with the decreasing system pH. The preparation method of the visual formaldehyde scavenger comprises by weight part mixing the raw materials of the visual formaldehyde scavenger. The preparation method of the visual formaldehydescavenger is simple and easy to operate and applicable to large-scale industrial production. When the raw materials comprise a raw gel liquid, the preparation method of the visual formaldehyde scavenger also comprises the step of gelatinizing an obtained gel liquid mixed solution. The prepared visual formaldehyde scavenger is in a gel state and is convenient to use and store.

Description

technical field [0001] The invention belongs to the technical field of formaldehyde removal, and in particular relates to a visual formaldehyde scavenger and a preparation method thereof. Background technique [0002] Formaldehyde, also known as formaldehyde, is a colorless gas with a pungent odor, poisonous and volatile. As an additive for interior decoration and discharge of waste gas and wastewater, the hazards of formaldehyde volatilization to the environment and human health have been paid more and more attention in the past few decades. At present, the removal methods of formaldehyde mainly include activated carbon adsorption method, photocatalytic oxidation method, chemical catalytic oxidation method, microbial degradation method of formaldehyde, plant absorption method and so on. Among these methods, although various methods can achieve a certain formaldehyde removal effect, the removal effect needs to be judged by external detection means, such as formaldehyde test...

AI Technical Summary

Problems solved by technology

However, there are three problems in this microsphere scavenger. One, its own scavenging effect is poor, and it needs to be used in combination with other scavenger to effectively improve the scavenging effect. This has the problem that the scavenging reaction and the adsorption process are not synchronized, and it is difficult to achieve the optimal scavenging effect. Another problem is that the color of the microspheres (usually black) and the color of potassium permanganate (purple) are relatively dark. When the microspheres are adsorbed and react with formaldehyde, the color becomes brownish black, which is visible to the naked eye. The observation is not obvious, and the color change is single; in addition, potassium permanganate has strong oxidation and toxicity, which is harmful to human respiratory tract, skin and eyes, and is not suitable for use in indoor and other living environments

Currently, no safe and visible formaldehyde scavenger has been reported

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