CS229222B1 - A method of preparing anionic-based disinfectants - Google Patents

Abstract

The invention relates to a method for preparing disinfectants based on anion exchangers containing iodine and chloriodine compounds. The current preparation process uses gaseous chlorine, which is disadvantageous due to its aggressiveness, the need to remove excess chlorine and finally due to the difficult process control. The aim of the invention is to eliminate these shortcomings. This aim is achieved according to the invention by a process in which the anion exchanger is treated with hydrochloric acid and iodine, preferably in the form of an alkali metal iodide. A solution of an oxidizing agent such as hydrogen peroxide, chloric acid or its salt is then added to the resulting mixture while stirring at a temperature of 5 to 45 °C.

Description

The invention relates to a method for preparing disinfectants based on anion exchangers containing iodine and chloroiodine compounds,

Various types of disinfectants based on anion exchangers have been published in the literature. For example, a disinfectant was prepared from an anion exchanger containing a dimethylaminoethanol functional group by adding iodine or a solution of potassium iodide in water and water to this anion exchanger and gradually dosing gaseous chlorine. HCl^J (chloroiodic acid) is formed, which then binds to the functional group of this anion exchanger. The disadvantage of this method of preparation is mainly the use of gaseous chlorine, in terms of its harmfulness. This is associated with problems associated with adjusting the equipment so that it is hermetically sealed against chlorine leakage. There are difficulties with excess chlorine, which must be removed from the reaction mixture and from the equipment after the process is completed. Another disadvantage is the difficulty of checking the reacted chlorine for the desired compound.

This disadvantage is eliminated according to the present invention by a method for preparing disinfectants based on anion exchangers containing iodide and chloroiodide compounds. This method consists in mixing the anion exchanger with hydrochloric acid and iodine, preferably in the form of an alkali metal iodide solution, and adding a solution of an oxidizing agent from the group including hydrogen peroxide, hydrochloric acid, and iodine to the resulting mixture, while stirring at a temperature of 5 to 4-5 °C.

229 222

- 3 chloramine and its salts with alkali metals and alkaline earth metals

Compared to the prior art, the invention has the advantage of not operating with chlorine gas. Another advantage is the easy possibility of selecting the degree of conversion, as shown below.

According to the invention, it has been found that if the reaction medium is still acidic and reducing, the desired compound HCl3J is formed. This is bound by the functional group of the anion exchanger as follows:

/(r> ₃ -h/+-ci~ + hci ₃ / « /r ₃ -h/+ ηοι ₄ γ

The reaction can, due to the preferential oxidation of HJ over HCl, stop at any stage of conversion, resulting in products with a variable ratio of anions and HOl^J^*. It is also possible to start directly from iodine instead of the iodide of the corresponding alkali metal, and the procedure is the same:

I. 2 KJ + 8 HC1 + 3 HgOg ^B 2 HCljJ + 6 HgO + 2 KOI

II. J ₂ + 6 HC1 + 2 H ₂ 0 ₂ ^B 2 H01 ₃ J + 4

III. 2 KJ + 3 Ha CIO + 8 H01 « 3 Ha 01 + 2 KOI + 2 HCl^J + 3 HgO

IV. J ₂ + 6 HCl + 2 Ha 010 « 2 HaOl + 2 HgO + 2 HG1 ₃ J

V. 2 KJ + 5 HCl + 3 HC1O ^B 2 KOI + 2 HC1_J + 3 HgO

VI. J ₂ + 4 HCl + 2 HC10 » 2 HClyF + 2 H ₂ O

We further found that any type of anion exchanger can be used as long as it is not degraded by hydrochloric acid, and that the result does not depend on the concentration of hydrochloric acid.

Example 1

250 g of an anion exchanger with a dimethylaminoethanol functional group was introduced into a 1,000 ml reaction vessel,

220 ml of hydrochloric acid as a 37% aqueous solution and 68 g of potassium iodide dissolved in TOO ml of distilled water.

From the separatory funnel, 230 ml of 40% HgO 2 were added to the reaction mixture at 30 °C while cooling and stirring. After the reaction mixture was completed, the mixture was stirred for another 10 minutes, and then the suspension was filtered off. This gave the desired product.

Example 2

229 222

In a 1000 ml reaction vessel, 250 g of an anion exchanger β with a trimethylamino functional group, 200 ml of hydrochloric acid as a 37% aqueous solution and 42 g of iodine were introduced.

From the separatory funnel, 150 ml of 40% H2O was added to the reaction mixture at 30 °C while cooling and stirring. After completion, the reaction mixture was stirred for another 10 minutes and then filtered off as a suspension. The desired product was thus obtained.

Example 3

250 g of an anion exchanger with a dimethylaminoethylene functional group was introduced into a 1,000 ml reaction vessel,

220 ml of hydrochloric acid as a 37% aqueous solution and 68 g of potassium iodide, dissolved in 100 ml of distilled water.

From the separatory funnel, 520 g of a 30% sodium hydroxide solution were added to the reaction mixture at 30 °C while cooling and stirring. After completion, the reaction mixture was stirred for another 10 minutes and then filtered off as a suspension, thereby obtaining the desired product.

Claims (1)

A process for the preparation of anion exchange disinfectants comprising iodide and chloro iodide compounds, characterized in that the anion exchanger is mixed with hydrochloric acid and iodine, preferably in the form. an alkali metal iodide, and a solution of an oxidizing agent selected from the group consisting of hydrogen peroxide, hypochlorous acid and its alkali metal and alkaline earth metal salts are added thereto while stirring at 5 to 45 ° C.