Claims
- 1. A process for the production of a peroxy acid which is storage stable and desensitized comprising adding to the mixture resulting from the reaction of an alkanedioic acid having at least five carbon atoms or an aromatic carboxylic acid having the formula ##STR2## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are hydrogen, COOH, 1-4 carbon atom alkyl, 1-4 carbon atom alkoxy or halogen with hydrogen peroxide in sulfuric acid a material which reacts with sulfuric acid to form a sulfate salt as a desensitizing agent, said material being an alkali metal hydroxide, an alkaline earth metal hydroxide or sodium aluminate and being added in an amount to raise the pH to 2-6.
- 2. A process according to claim 1 for the production of a diperoxyalkanedioic acid which is storage stable and desensitized comprising adding to the mixture resulting from the reaction of an alkanedioic acid having at least five carbon atoms with hydrogen peroxide in sulfuric acid a material which reacts with sulfuric acid to form a sulfate salt as a desensitizing agent.
- 3. The process of claim 2 wherein the added material is added in aqueous solution or suspension.
- 4. The process of claim 3 wherein the added material is an aqueous solution of sodium hydroxide, aqueous slurry of magnesium hydroxide or aqueous solution or slurry of sodium aluminate.
- 5. The process of claim 4 wherein the added material is employed in an amount to give a solid diperoxyacid having a peroxyacid content of 2.5 to 85.4%.
- 6. The process of claim 5 wherein the starting dialkanoic acid is azelaic acid.
- 7. The process of claim 4 wherein the starting dialkanoic acid is a adipic acid, azelaic acid, suberic acid, sebacic acid or 1,12-dodecandioic acid.
- 8. The process of claim 5 wherein the added material is added at 0.degree. to 30.degree. C.
- 9. The process of claim 6 wherein the material is added at 15.degree.-20.degree. C.
- 10. The process of claim 7 including the additional steps of removing and drying the precipitated diperoxyacid completely coated with the sulfate salt as a desensitizing agent.
- 11. The process of claim 4 including the additional steps of removing and drying the precipitated diperoxyacid completely coated with the sulfate salt as a desensitizing agent.
- 12. The process according to claim 2 wherein the added material is added until the pH rises to 3-5.5.
- 13. The process of claim 2 wherein the alkaline material is sodium hydroxide, magnesium hydroxide or sodium aluminate.
- 14. The process of claim 13 wherein the alkanedioic acid is azelaic acid and the precipitated diperoxyazelaic acid completely coated with sodium sulfate or magnesium sulfate is removed from the aqueous mixture and dried.
- 15. The process of claim 1 wherein the added material is added at 0.degree. to 30.degree. C., there is employed 2 to 20 moles of hydrogen peroxide per mole of dialkanoic acid and there is employed the added material in an amount to give a solid diperoxyacid having a peroxyacid content of 2.5 to 85.4%.
- 16. The process of claim 15 wherein the added material is added in aqueous solution or suspension and the process includes the steps of removing and drying the precipitated diperoxyacid coated with the sulfate salt as a desensitizing agent.
- 17. The process of claim 1 wherein there is employed the aromatic carboxylic acid.
- 18. The process of claim 17 wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are hydrogen or COOH.
- 19. The process of claim 18 wherein the aromatic carboxylic acid is isophthalic acid.
- 20. The process of claim 17 wherein the added material is an aqueous solution of sodium hydroxide, aqueous slurry of magnesium hydroxide, aqueous suspension of lithium hydroxide or aqueous solution of sodium aluminate.
- 21. The process of claim 17 wherein the added material is employed in an amount to give a solid diperoxy-acid having a peroxyacid content of 18.0 to 85.1%.
- 22. The process of claim 21 wherein the starting aromatic acid is isophthalic acid.
- 23. The process of claim 20 wherein the added material is added at 0.degree. to 30.degree. C.
- 24. The process of claim 20 including the additional steps of removing and drying the precipitated peroxyacid completely coated with the sulfate salt as a desensitizing agent.
- 25. The process of claim 17 including the additional steps of removing and drying the precipitated peroxyacid completely coated with the sulfate salt as a desensitizing agent.
- 26. The process of claim 2 wherein the alkanedioic acid has 5 to 16 carbon atoms.
- 27. An aqueous composition of pH 2 to 6 suitable for forming desensitized, storage stable peroxy acid upon drying, said aqueous composition containing hydrogen peroxide and a diperoxyalkanedioic acid having 5 to 16 carbon atoms or the peroxy acid of an aromatic carboxylic acid having the formula ##STR3## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are hydrogen, COOH, 1-4 carbon atom alkyl, 1-4 carbon atom alkoxy or halogen and prepared by a process consisting essentially of adding to the aqueous mixture resulting from the reaction of an alkanedioic acid having 5 to 16 carbon atoms or an aromatic carboxylic acid of formula (I) with aqueous hydrogen peroxide and sulfuric acid a material which reacts with sulfuric acid to form a sulfate salt and is an alkali metal hydroxide, an alkaline earth metal hydroxide, or sodium aluminate.
- 28. An aqueous composition according to claim 27 wherein there is employed an alkanedioic acid having 5 to 16 carbon atoms.
- 29. An aqueous composition according to claim 28 wherein the added material is added in aqueous solution or suspension and in an amount such that the aqueous composition has a pH of 3 to 5.5, said process having been carried out at a temperature of 0.degree. to 30.degree. C.
- 30. An aqueous composition according to claim 27 wherein there is employed an aromatic carboxylic acid of formula (I).
- 31. An aqueous composition according to claim 30 wherein the added material is added in aqueous solution or suspension and in an amount such that the aqueous composition has a pH of 3 to 5.5, said process having been carried out at a temperature of 0.degree. to 30.degree. C.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of application Ser. No. 954,590 filed Oct. 25, 1978, now abandoned, the entire disclosure of which is hereby incorporated by reference.
US Referenced Citations (10)
Foreign Referenced Citations (8)
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BEX |
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CAX |
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Entry |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
954590 |
Oct 1978 |
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