Method and apparatus for producing halogen oxyacid solution

Patent metadata

Field	Value
Publication number	US-11738997-B2
Application number	US-202117357232-A
Country	US
Kind code	B2
Filing date	Jun 24, 2021
Priority date	Jun 25, 2020
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

The present invention provides industrially advantageous production method and production apparatus, with respect to production of a halogen oxyacid solution. There is solved by a method for producing a halogen oxyacid solution, comprising continuously supplying an organic alkaline solution and halogen to a static mixer and mixing them, to thereby continuously obtain a halogen oxyacid generated.

First claim

The invention claimed is:

1. A method for producing a halogen oxyacid solution, comprising continuously supplying an organic alkaline solution and halogen to a static mixer and mixing them, to thereby continuously obtain a halogen oxyacid generated.

2. The method for producing a halogen oxyacid solution according to claim 1 , wherein a ratio of raw materials supplied is controlled so that a pH at 25° C. of a mixed liquid of the organic alkaline solution and halogen passed through the static mixer is more than 10.5 and less than 14.1.

3. The method for producing a halogen oxyacid solution according to claim 2 , wherein the pH at 25° C. of the mixed liquid is 12.0 or more and 13.8 or less.

4. The method for producing a halogen oxyacid solution according to claim 1 , wherein the halogen is supplied at multiple stages.

5. The method for producing a halogen oxyacid solution according to claim 1 , wherein the mixing is performed at multiple stages.

6. The method for producing a halogen oxyacid solution according to claim 1 , wherein the static mixer is an ejector, a collision type static mixer, or a Sulzer static mixer.

7. The method for producing a halogen oxyacid solution according to claim 1 , wherein the halogen oxyacid solution is retrieved without being circulated in a production process.

8. The method for producing a halogen oxyacid solution according to claim 1 , wherein a pH at 25° C. of the organic alkaline solution is 10.5 or more and 14.5 or less.

9. The method for producing a halogen oxyacid solution according to claim 1 , wherein the organic alkali is onium hydroxide and the halogen oxyacid is halogen oxyacid onium.

10. The method for producing a halogen oxyacid solution according to claim 9 , wherein the onium hydroxide is quaternary alkylammonium hydroxide and the halogen oxyacid onium is quaternary ammonium hypohalite.

11. The method for producing a halogen oxyacid solution according to claim 10 , wherein the quaternary alkylammonium hydroxide is tetramethylammonium hydroxide.

12. The method for producing a halogen oxyacid solution according to claim 1 , wherein the halogen is chlorine, bromine, hypochlorous acid, hypobromous acid, chlorous acid, bromous acid, chloric acid, bromic acid, iodine, hypoiodous acid, iodous acid, or iodic acid.

13. The method for producing a halogen oxyacid solution according to claim 1 , wherein the halogen is chlorine.

14. A halogen oxyacid solution production apparatus comprising a static mixer, an organic alkaline solution supply means and a halogen supply means to the static mixer, and a reaction liquid retrieve means for outwardly retrieving a reaction liquid from the static mixer, wherein
an organic alkaline solution and halogen are continuously supplied respectively from the organic alkaline solution supply means and the halogen supply means to the static mixer, and mixed, to thereby generate a halogen oxyacid solution as a reaction liquid, and the reaction liquid is continuously retrieved by the reaction liquid retrieve means.

15. The halogen oxyacid solution production apparatus according to claim 14 , further comprising one or more separate static mixers downstream of the static mixer and upstream of the reaction liquid retrieve means, and further comprising a halogen supply means for supplying halogen to each of the separate static mixers.

16. The halogen oxyacid solution production apparatus according to claim 14 , further comprising a heat exchanger that performs heat exchange of the reaction liquid.

Assignees

• Tokuyama Corp

Inventors

• Negishi Takayuki
• Shimoda Takafumi
• Saito Akihiro
• Matsuda Naoki
• Kakizono Kenichi
• Kawano Takeshi
• Moriwaki Masayuki

Classifications

• C11D2111/22

  Electronic devices, e.g. PCBs or semiconductors · CPC title

• C01B11/06 Primary

  Hypochlorites · CPC title

• B01F25/43

  Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction · CPC title

• B01J19/26 Primary

  Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles · CPC title

• C07C209/68 Primary

  from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton · CPC title