http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106032351-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-487 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-487 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-42 |
| filingDate | 2015-03-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-06-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-06-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-106032351-B |
| titleOfInvention | Crude PTA purification treatment method |
| abstract | The invention relates to a method for purifying and treating crude PTA, which mainly comprises the following steps: (1) preparing raw materials; (2) neutralizing; (3) primary solid-liquid separation treatment; (4) flocculation treatment; (5) carrying out solid-liquid separation treatment again; (6) acid precipitation treatment; (7) and (5) separating and treating a finished product. The process method has the following advantages: (1) the purification cost is greatly reduced: the lime is cheap, and the substances obtained by the reaction of the lime and acid radicals can be safely used for building gypsum products, such as gypsum boards, light brick walls and cement retarders, so that secondary pollutants are not generated, and the lime can be sold and utilized to make up for the purification cost. (2) The lime becomes calcium hydroxide after absorbing water and digesting, and the calcium hydroxide reacts with acid radicals in the mother liquor to generate water-containing substances; the mother liquor can be recycled, so that the discharge of secondary wastewater is avoided, more thorough wastewater recycling can be realized, and the PTA with higher purity can be obtained. |
| priorityDate | 2015-03-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 72.