Use of phosphotartaric acid and the salts thereof for the treatment of water in water-conducting systems

Patent metadata

Field	Value
Publication number	US-10287199-B2
Application number	US-201415110264-A
Country	US
Kind code	B2
Filing date	Dec 2, 2014
Priority date	Feb 12, 2014
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

The present invention relates to the use of phospho-tartaric acid and/or the salts thereof for the treatment of water in water-conducting systems.

First claim

The invention claimed is:

1. A method of treating water, comprising:
adding at least one of phosphotartaric acid and salts thereof in water in a water-conducting system.

2. The method as claimed in claim 1 , wherein the phosphotartaric acid is added to the water-conducting system in an amount of 0.1 to 10000 mg based on one liter of the water in the water-conducting system.

3. The method as claimed in claim 1 , wherein the water in the water-conducting system has a conductivity in a range of 1 to 200000 μS/cm.

4. The method as claimed in claim 1 , wherein the at least one of the phosphotartaric acid and the salts thereof is added in the water-conducting system having a calcium hardness in a range of 0 to 30 mol based on one cubic meter of liquid of the water-conducting system.

5. The method as claimed in claim 1 , wherein the at least one of the phosphotartaric acid and the salts thereof is in a form of one or more alkali metal salts and/or one or more ammonium salts.

6. The method as claimed in claim 1 , wherein the at least one of the phosphotartaric acid and the salts thereof is a corrosion inhibitor.

7. The method as claimed in claim 1 , wherein the at least one of the phosphotartaric acid and the salts thereof is a scale inhibitor.

8. The method as claimed in claim 1 , wherein the at least one of the phosphotartaric acid and the salts thereof is constituent a) and added together with at least one of constituent b) and constituent c),
wherein the constituent b) is at least one selected from the group consisting of aliphatic di-, tri- and oligocarboxylic acids comprising up to 6 carboxylic acid groups, aliphatic monocarboxylic acids having at least one hydroxyl group, amino acids, and salts thereof, and
the constituent c) is at least one selected from the group consisting of inorganic polyphosphoric acid, meta-polyphosphoric acid and salts thereof, and water-soluble organic phosphonic acids and salts thereof.

9. The method as claimed in claim 8 , wherein the constituent a) is added with the constituent b), and
a weight ratio of the constituent a) to the constituent b), calculated in each case as pure substance, is in a range of 1:20 to 20:1.

10. The method as claimed in claim 8 , wherein the constituent b) is at least one selected from the group consisting of tartaric acid, malic acid, lactic acid, glycolic acid, gluconic acid, citric acid, isocitric acid, mandelic acid, mevalonic acid, tartronic acid, hydroxyalkanoic acid, gallic acid, salicylic acid, hydroxybenzoic acid, aspartic acid, alkanedioic acids, unsaturated alkanedioic acids, and salts thereof.

11. The method as claimed in claim 10 , wherein the alkanedioic acids have a formula COOH—(CH 2 ) n —COOH, wherein n is in a range from 1 to 14.

12. The method as claimed in claim 8 , wherein the constituent a) is added with the constituent c), and
the constituent c) is at least one selected from the group consisting of polyphosphoric acid, metapolyphosphoric acid and salts thereof, and organic phosphonic acids.

13. The method as claimed in claim 12 , wherein the polyphosphoric acid has a formula H n+2 P n O 3n+1 , wherein n is in a range from 1 to 100.

14. The method as claimed in claim 12 , wherein the meta-polyphosphoric acid has a formula H n P n O 3n , wherein n is in a range from 3 to 100.

15. The method as claimed in claim 8 , wherein the at least one of the phosphotartaric acid and the salts thereof is in a form of an aqueous solution or dispersion.

16. The method as claimed in claim 8 , wherein the constituent b) is at least one selected from the group consisting of fumaric acid, maleic acid, butanetetracarboxylic acid, cyclohexanehexanecarboxylic acid, and salts thereof.

17. The method as claimed in claim 1 , wherein the phosphotartaric acid is added with at least one biodispersant selected from the group consisting of polyalkylene glycols, terpenes, non-ionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants.

18. The method as claimed in claim 1 , wherein the phosphotartaric acid is added with at least one biocide selected from the group consisting of chlorine, hypochlorites, hypobromites, bromochloride, chlorine dioxide, ozone, hydrogen peroxide, perborates, permanganates, organic peracids, di- and trichloroisocyanurates, glutardialdehyde, quaternary ammonium or phosphonium compounds, polyquaternary ammonium compounds, isothiazole compounds, copper or silver compounds, bronopol, benzoates, thiocarbamates, azines, 2,2-dibromo-2-cyanoacetamides, halohydantoins, and haloamines.

19. The method as claimed in claim 1 , wherein the phosphotartaric acid is added with at least one selected from the group consisting of
(A) at least one biodispersant selected from the group consisting of polyalkylene glycols, terpenes, non-ionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants,
(B) at least one biocide selected from the group consisting of chlorine, hypochlorites, hypobromites, bromochloride, chlorine dioxide, ozone, hydrogen peroxide, perborates, permanganates, organic peracids, di- and trichloroisocyanurates, glutardialdehyde, quaternary ammonium or phosphonium compounds, polyquaternary ammonium compounds, isothiazole compounds, copper or silver compounds, bronopol, benzoates, thiocarbamates, azines, 2,2-dibromo-2-cyanoacetamides, halohydantoins, and haloamines, and
(C) at least one selected from the group consisting of a corrosion inhibitor, a scale inhibitor, and a dispersant.

20. A composition comprising phosphotartaric acid and/or salts thereof and one or more hydroxycarboxylic acid(s) and/or salts thereof.

Assignees

• Kurita Water Ind Ltd

Inventors

• Hater Wolfgang
• Lunkenheimer Rudolf
• Wolf Florian

Classifications

• C23F11/126

  Aliphatic acids · CPC title

• C23F11/08 Primary

  in other liquids · CPC title

• C02F5/14

  containing phosphorus · CPC title

• C02F2303/04

  Disinfection · CPC title

• C02F1/72

  by oxidation {(C02F1/4672 takes precedence)} · CPC title