| PATENT ASSIGNEE'S COUNTRY | Germany |
| UPDATE | 04.99 |
| PATENT ASSIGNEE | BASF AG |
| PATENT CLAIMS |
Mfg process - Sulfonating nitrotoluene with oleum to produce 4-nitrotolue ne-2-sulfonic acid (I) - Diluting (I) soln with water - Partially neutralizing with mineral base - Extracting neutralized (I) with lipophilic amine |
| PATENT PHOTOCOPY | Available on request |
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