CA2413901A1 - An acid washed adsorbent carbon used in a method for the purification of acetaminophen - Google Patents
An acid washed adsorbent carbon used in a method for the purification of acetaminophen Download PDFInfo
- Publication number
- CA2413901A1 CA2413901A1 CA002413901A CA2413901A CA2413901A1 CA 2413901 A1 CA2413901 A1 CA 2413901A1 CA 002413901 A CA002413901 A CA 002413901A CA 2413901 A CA2413901 A CA 2413901A CA 2413901 A1 CA2413901 A1 CA 2413901A1
- Authority
- CA
- Canada
- Prior art keywords
- acid washed
- acetaminophen
- purification
- adsorbent carbon
- washed adsorbent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 title abstract 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract 6
- 239000002253 acid Substances 0.000 title abstract 4
- 229910052799 carbon Inorganic materials 0.000 title abstract 4
- 239000003463 adsorbent Substances 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 3
- 229960005489 paracetamol Drugs 0.000 title 1
- 238000000746 purification Methods 0.000 title 1
- 239000007864 aqueous solution Substances 0.000 abstract 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 abstract 2
- 239000002243 precursor Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
An acid washed adsorbent carbon which has been contacted with an aqueous solution of a reducing sulfite is provided which may be used in a method for purifying a crude N-acetyl-para-aminophenol (APAP) containing color bodies or their precursors, the method comprising: a) forming a hot aqueous solution of the crude APAP; and b) subsequently contacting the hot solution with an acid washed adsorbent carbon, e.g., an activated carbon, which acid washed carbon, prior to such contact, has been pretreated by contacting it with an aqueous solution of a reducing sulfite.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US60810690A | 1990-11-01 | 1990-11-01 | |
| US608,106 | 1990-11-01 | ||
| CA002053604A CA2053604C (en) | 1990-11-01 | 1991-10-17 | Improved method for the purification of acetaminophen |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002053604A Division CA2053604C (en) | 1990-11-01 | 1991-10-17 | Improved method for the purification of acetaminophen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2413901A1 true CA2413901A1 (en) | 1992-05-02 |
| CA2413901C CA2413901C (en) | 2004-01-27 |
Family
ID=25674823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002413901A Expired - Lifetime CA2413901C (en) | 1990-11-01 | 1991-10-17 | An acid washed adsorbent carbon used in a method for the purification of acetaminophen |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2413901C (en) |
-
1991
- 1991-10-17 CA CA002413901A patent/CA2413901C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2413901C (en) | 2004-01-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |