http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111533475-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B11-024 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B11-032 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B11-264 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B11-032 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B11-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B11-024 |
| filingDate | 2020-05-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-06-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-06-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-111533475-B |
| titleOfInvention | Crystal transformation agent and method for preparing alpha-type high-strength hemihydrate gypsum by using same |
| abstract | The invention discloses a crystal modifier and a method for preparing alpha-type high-strength semi-hydrated gypsum by using the crystal modifier, which mainly comprises the following steps: 1) adjusting the pH value of the desulfurized gypsum to 6-9; 2) preparing a suspension of desulfurized gypsum and water, and adding a crystal modifier, a crystallization habit stabilizer and a surfactant; 3) reacting for 2-6 h at the constant temperature of 110-160 ℃ and the pressure of 0.2-1.0 MPa to obtain the alpha-semi-hydrated gypsum. The invention is particularly suitable for preparing high-strength semi-hydrated gypsum and other high-end products, and the flexural strength of the obtained product can reach 6.5MPa, and the compressive strength can reach 54.5 MPa. The method is mainly used for converting and utilizing the desulfurization gypsum which is the byproduct of desulfurization in the coal-fired power plant. The method for preparing the finished gypsum product not only can reduce the exploitation of natural gypsum ores, thereby saving resources, but also can change waste into valuable, realizes the cyclic utilization of resources, and is a technology worthy of popularization. |
| priorityDate | 2020-05-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 19.