Methods for nitrating compounds
View Patent ↗Methods of nitrating compounds, such as phloroglucinol or a methoxy derivative thereof, are disclosed. For example, a reaction mixture may be formed by combining sulfuric acid and at least one nitrate salt. A nitratable aromatic compound, such as phloroglucinol or a methoxy derivative thereof, may then be exposed to the reaction mixture to nitrate the phloroglucinol or methoxy derivative thereof.
1. A method of nitrating a compound, comprising:
combining at least one nitrate salt and a sulfuric acid solution to form a reaction mixture; and
exposing phloroglucinol or a methoxy derivative thereof to the reaction mixture to nitrate the phloroglucinol or methoxy derivative thereof.
2. The method of claim 1 , wherein combining at least one nitrate salt and a sulfuric acid solution to form a reaction mixture comprises combining the at least one nitrate salt and the sulfuric acid solution comprising from approximately 90% by weight to approximately 100% by weight of sulfuric acid to form the reaction mixture.
3. The method of claim 1 , wherein combining at least one nitrate salt and a sulfuric acid solution to form a reaction mixture comprises combining the at least one nitrate salt and the sulfuric acid solution comprising 96% by weight sulfuric acid and 4% by weight water to form the reaction mixture.
4. The method of claim 1 , wherein combining at least one nitrate salt and a sulfuric acid solution to form a reaction mixture comprises combining at least one of sodium nitrate, potassium nitrate, ammonium nitrate, calcium nitrate, and magnesium nitrate with the sulfuric acid solution.
5. The method of claim 1 , wherein combining at least one nitrate salt and a sulfuric acid solution to form a reaction mixture comprises adding the at least one nitrate salt into the sulfuric acid solution at a temperature in a range of from about 0° C. to about 30° C. to form the reaction mixture.
6. The method of claim 1 , wherein combining at least one nitrate salt and a sulfuric acid solution to form a reaction mixture comprises adding the at least one nitrate salt into the sulfuric acid solution at a rate sufficient to maintain a temperature of the reaction mixture at less than about 10° C.
7. The method of claim 1 , wherein exposing phloroglucinol or a methoxy derivative thereof to the reaction mixture comprises exposing at least one of phloroglucinol, 5-methoxyresorcinol, 3,5-dimethoxyphenol, and 1,3,5-trimethoxybenzene to the reaction mixture.
8. The method of claim 1 , wherein exposing phloroglucinol or a methoxy derivative thereof to the reaction mixture comprises increasing a temperature of the phloroglucinol or the methoxy derivative thereof and the reaction mixture to a temperature within a range of from about 0° C. to about 27° C.
9. The method of claim 1 , wherein combining at least one nitrate salt and a sulfuric acid solution and exposing phloroglucinol or a methoxy derivative thereof to the reaction mixture comprises combining the at least one nitrate salt and the sulfuric acid solution and exposing the phloroglucinol or the methoxy derivative thereof in a single reaction vessel.
10. The method of claim 1 , wherein exposing phloroglucinol or a methoxy derivative thereof to the reaction mixture comprises mixing the phloroglucinol or the methoxy derivative thereof with the reaction mixture for from about 5 minutes to about 15 minutes.
11. A method of nitrating a compound, comprising:
reacting phloroglucinol or a methoxy derivative thereof with a reaction mixture comprising sulfuric acid and at least one nitrate salt to nitrate the phloroglucinol or the methoxy derivative thereof.
12. The method of claim 11 , wherein reacting phloroglucinol or a methoxy derivative thereof with a reaction mixture comprising sulfuric acid and at least one nitrate salt comprises reacting three molar equivalents of the at least one nitrate salt with the phloroglucinol or the methoxy derivative thereof.
13. The method of claim 11 , wherein reacting phloroglucinol or a methoxy derivative thereof with a reaction mixture comprising sulfuric acid and at least one nitrate salt comprises producing a mononitrated, dinitrated, or trinitrated reaction product of phloroglucinol or the methoxy derivative thereof.
14. The method of claim 11 , wherein reacting phloroglucinol or a methoxy derivative thereof with a reaction mixture comprising sulfuric acid and at least one nitrate salt comprises producing trinitrophloroglucinol, 5-methoxystyphnic acid, 3,5-dimethoxypicric acid, or 1,3,5-trimethoxy-2,4,6-trinitrobenzene.
15. The method of claim 11 , wherein reacting phloroglucinol or a methoxy derivative thereof with a reaction mixture comprising sulfuric acid and at least one nitrate salt comprises adding the at least one nitrate salt to the sulfuric acid at a temperature in a range of from about 0° C. to about 15° C.
16. The method of claim 15 , wherein reacting phloroglucinol or a methoxy derivative thereof with a reaction mixture comprising sulfuric acid and at least one nitrate salt comprises increasing the temperature of the phloroglucinol or the methoxy derivative thereof and the reaction mixture to a temperature of about 50° C.
17. The method of claim 11 , wherein reacting phloroglucinol or a methoxy derivative thereof with a reaction mixture comprising sulfuric acid and at least one nitrate salt comprises:
adding the at least one nitrate salt to the sulfuric acid at a temperature in a range of from about 0° C. to about 15° C.;
mixing the phloroglucinol or the methoxy derivative thereof with the reaction mixture at a temperature in a range of from about 0° C. to about 15° C. to form a solution or slurry; and
stirring the solution or slurry at a temperature in a range of from about 10° C. to about 25° C. to nitrate the phloroglucinol or the methoxy derivative thereof.