TW200609028A - Process for purification and reuse of phosphoric acid - Google Patents
Process for purification and reuse of phosphoric acidInfo
- Publication number
- TW200609028A TW200609028A TW093127458A TW93127458A TW200609028A TW 200609028 A TW200609028 A TW 200609028A TW 093127458 A TW093127458 A TW 093127458A TW 93127458 A TW93127458 A TW 93127458A TW 200609028 A TW200609028 A TW 200609028A
- Authority
- TW
- Taiwan
- Prior art keywords
- phosphoric acid
- etchant solution
- acid
- aluminum etchant
- reuse
- Prior art date
Links
Landscapes
- Removal Of Specific Substances (AREA)
Abstract
The present invention provides a process for effective purification and reuse of phosphoric acid from an aluminum etchant solution. The invented process comprises the steps of: (a) using a fractionation process to separate nitric acid from the aluminum etchant solution and remove the nitric acid; (b) using a fractionation process to separate acetic acid from the residual aluminum etchant solution from Step (a); (c) adding alcohol into the residual aluminum etchant solution from Step (b) to perform esterification reaction of acetic acid for removing minute amount of acetic acid; and (d) using a fractionation process to remove acetic ester and water produced from Step (c) and recycle phosphoric acid. The invented process can obtain phosphoric acid with a purity no less than 70%.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW093127458A TW200609028A (en) | 2004-09-10 | 2004-09-10 | Process for purification and reuse of phosphoric acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW093127458A TW200609028A (en) | 2004-09-10 | 2004-09-10 | Process for purification and reuse of phosphoric acid |
Publications (1)
Publication Number | Publication Date |
---|---|
TW200609028A true TW200609028A (en) | 2006-03-16 |
Family
ID=57807471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW093127458A TW200609028A (en) | 2004-09-10 | 2004-09-10 | Process for purification and reuse of phosphoric acid |
Country Status (1)
Country | Link |
---|---|
TW (1) | TW200609028A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108640093A (en) * | 2018-06-22 | 2018-10-12 | 湖北永绍科技股份有限公司 | A kind of process for separating and purifying of mixing waste acid liquor |
-
2004
- 2004-09-10 TW TW093127458A patent/TW200609028A/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108640093A (en) * | 2018-06-22 | 2018-10-12 | 湖北永绍科技股份有限公司 | A kind of process for separating and purifying of mixing waste acid liquor |
CN108640093B (en) * | 2018-06-22 | 2021-11-09 | 湖北永绍科技股份有限公司 | Separation and purification process of mixed waste acid solution |
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