JPS60180902A - Stabilized production of chlorine dioxide and deodorizing and disinfecting agent using it - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Chlorine dioxide has long been known as an oxidizing agent, and its most prominent industrial use was in the valve industry.

Since ancient times, chlorine has been used for oxidative bleaching of valve fibers, but with the demand for higher quality valves, chlorine dioxide has come into use and is now being generated and consumed by large-scale facilities. .

This method uses sodium chlorate or calcium chlorate as a raw material, and uses the Machinon method, the new Madinon method, the Porst method,
There are the CIP method, the Norbay method, and improved methods thereof.

As reducing agents in these methods, hydrogen chloride, sulfur dioxide gas, metal ions, carbon, methanol, sulfuric acid, or electrolytic reduction methods are used, and these methods have been put to practical use in valve factories.

In addition to the above-mentioned bulb bleaching, chlorine dioxide has other uses such as bleaching textiles and wheat, and as a disinfectant and deodorizing agent.

The gas is red-yellow, specific gravity 3.0 g/L, melting point -5.9
℃, boiling point 5.9℃, in situ decomposition at 100℃.

Therefore, handling is not easy and is dangerous. However, it dissolves well in water, and in hot water it decomposes into C1, O, HCl0.

In order to stabilize this, the aqueous solution is changed to the alkaline side, that is,
A method of stabilizing sodium carbonate by adding peroxide and generating chlorine dioxide through an acidifying operation is disclosed in US Pat. No. 3.
No. 123.521, and further that acidic solutions of alkali metals and alkaline earth metals in chlorous acid generate chlorine dioxide gas is disclosed in U.S. Pat. No. 2,071.0.
It is described in No. 91.

These methods are inconvenient and dangerous because they all handle liquid compositions.

For this reason, U.S. Patents 2,071,094 and 3,2
No. 71,242 proposes a chlorine dioxide generator composition in powder form. These require contact with water as an essential condition in order to start generating chlorine dioxide.

Furthermore, an aqueous chlorite solution stabilized by a well-known peroxygen compound of alkali metal is used as a basic adsorbent with a large adsorption capacity, and synthetic calcium silicates, fine phosphoric acid,
He proposes talc, etc., and mentions Johnsman Beer's (Microcell E), which can be easily analogized to diatomaceous earth, etc., which was used in the old days for the stable handling of nitrocellulose. This is a well-known technique.

The present invention provides an aqueous chlorite solution, more preferably a sodium chlorite solution, stabilized by an alkali metal or an alkali metal peroxygen compound, stabilized by adding sodium montmorillonite, to form a sol, gel, or powder. It has been newly discovered that chlorine dioxide gas is not generated even at 60 to 70° C. and is extremely stable.

The chemical components of the sodium montmorillonite employed in the present invention are 5inL44-55, 81,0316-3
2. Fe, (4,0,06~8, MgOO,1, Ca
One ~3.72. , l0none ~2.2
5. Na, One -3,80,H,O°' 5
．． 4-12, l(,0'-' 4-18 (Mr. Toshio Sudo) are shown.

Furthermore, among clay minerals, sodium montmorillonite is the most water-swellable, a phenomenon not observed in other clays, and it swells to 7-8-10 times its original volume. In exchangeable cations, the lattice expansion of Na is infinite. - Although it has not been clearly analyzed what mechanism this sodium montmorillonite uses to stabilize chlorine dioxide solutions and sodium chlorite aqueous solutions, its effects have already been described. Shimesu.

The thus obtained chlorine dioxide solution or sodium chlorite solution and sodium montmorillonite are diluted by adding a sol or gel, or a multi-surface area powdered diatomaceous earth, silica, etc. Although the technology suggests adding an acidic substance, the present invention easily converts chlorine dioxide by appropriately mixing acpargite and zeolite, which are clay minerals, as stated in claim (3). It can occur. Furthermore, as described in Claim 4, it is possible to increase the initial concentration of chlorine dioxide generated, rapidly fill the required volume, and control it to continue to generate chlorine dioxide for sterilization or deodorization. In other words, an acidic substance within the limit is added to increase the initial concentration used, and after the reaction with this acidic substance is completed, it can be controlled so that chlorine dioxide is slowly generated using acpargite or zeolite. It is.

The new finding according to the present invention has cation exchange ability. Sodium can only be stabilized in montmorillonite, and zeolite, sepiolite, and acpulgite are
The solid powder used in the acidification operation proposed in the prior art (lower than pH 6) (both 2 and 6 p
This is a new invention that is used as an inexpensive and stable chlorine dioxide gas inducer.

That is, here, it is possible to obtain a sol, gel, and powder of sodium montmolyte from a chlorite/soda solution containing chlorine dioxide, which is stable and easy to handle, and which is easy to handle even on the alkaline side. It is possible to generate chlorine dioxide gas. Concerning zeolite, ceviolite, and acpargite.

Chlorite nodashi by nodium montmorillonite
By adding it to swimming pool water, it can be supplied as a safer disinfectant than adding hypochlorous acid solution.

Example (weight ratio) (Al (Bl (C1 1, 25% sodium chlorite solution) 27 27 272,
futi5ium montmorillonite 2814 water swelling gel (
2-10% real content) 3. Sodium silicate solution 2814 (2-10% concentration) 4. Microcell (E type) 45 45 45 Stabilized chlorine dioxide powder: 10 (1100' +00 (effective C
(I0.50.000 ppm) According to this example, it can be stabilized even under vacuum and heating at 60 to 70°C.

(11+21 Ingredients +A+, +8+, (C) 50 50 Attapulgite 5040-48 Acidic clay 2-10 +00 100 With this blend, it is possible to retain and generate chlorine dioxide from the powder.

Patent applicant: Tadashi Tezuka

Claims (1)

[Claims] 1. A method of adding an appropriate amount of nodium montmorillonite to a sodium chlorite solution to stabilize the solution without generating chlorine dioxide even at 60°C to 70°C, and nodium montmorillonite and sodium chlorite Concerning mixtures of solutions. Generally, sodium chlorite solution is stabilized with alkaline substances, such as sodium silicate, caseinoda, etc., as alkaline salts. In 2.1, the mixture of nodium montmorillonite and sodium chlorite solution can be prepared in gel, gel, and powder states depending on its concentration, and can also be used in suitable powder materials, such as known porous or , diluted with inorganic materials having multiple surface areas, and/or pulverized. In 3.2, the method for generating chlorine dioxide gas is to use a powder that has adsorbed an acidic substance, a salt that has acidity, or a powder that has adsorbed an aqueous solution of a hydrogen ion-generating acid, etc.
And, although it shows alkalinity, a method of easily generating chlorine dioxide by mixing attapulgite powder, seviolite powder, and zeolite powder. 40. From a powdered sodium chlorite solution stabilized by nodium montmorillonite, the initial concentration of chlorine dioxide gas is gradually raised to a level sufficient to maintain the bactericidal or deodorizing effect of the atmosphere, in order to co-retrol the gas.
Those who use acid clay or activated clay for a portion and attapulgite, sepiolite, zeolite, etc. for the remainder 5.2.
In 3.4, each is housed in a container separated by an appropriate partition, and when necessary, the two are mixed and reacted by looking through the partition, and the chlorine dioxide gas is released from the two-layer hole provided in the wall of the container. Method. That is, it is necessary to take the non-woven cloth and return it to the container mentioned above. 6.1, relates to a method for increasing the effectiveness of detergents for cleaning (including dry cleaning) by mixing with surfactants; that is, oxidizing and decomposing dirt on laundry objects to increase the washing effect. .