http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5730950-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_23d00b87bbf3116ffec96c4e8e4bcd42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f1db5e8315e973c0843e07a1efdbee32 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S423-02 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B17-507 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B17-50 |
| filingDate | 1996-06-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1998-03-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_057d0acee9c401c01b2cabede75ee882 |
| publicationDate | 1998-03-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-5730950-A |
| titleOfInvention | Sulfuric acid waste recycling by regenerative process |
| abstract | The process will recover sulfuric acid on the 90-95% concentration range by roasting of ferrous sulfate hydrate crystals at high temperature under retort conditions. In the first step of the recovery process 6 (see FIG. 1) hydroxide slurry is reacted with the waste stream, and ferrous sulfate crystals obtained. In the second step 9 iron sulfate crystals are roasted and water of hydration reacts with sulfate and sulfur trioxide to produce sulfuric acid in a retort operation. The sulfuric acid and sulfur trioxide are condensed or absorbed in water or dilute sulfuric acid and are of a high purity, leaving iron oxide as a recovered carrier. In the third step, this iron oxide/hydroxide is reduced 13 and used to produce a slurry, which is pumped back to react with the entering sulfuric acid waste stream. The process has the following advantages: n continuous operation n non-exotic and inexpensive chemicals are used n high purity sulfuric acid is recovered n can operate at large and small production levels n low maximum temperature for sulfuric acid recovery (750 degrees C.). |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110170179-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1028088-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-101717280-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107840311-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-101200439-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0047518-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6497745-B2 |
| priorityDate | 1996-06-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 67.