http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2019119175-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8664deea13b12edd45b9794672dc7540 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A01G22-25 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A01G22-50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A01G22-45 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A01G22-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A01G22-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A01G22-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A01G22-05 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-61 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-53 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-62 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C05D1-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A01C21-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01D5-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01D5-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A01C21-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C05D1-02 |
| filingDate | 2017-03-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2d3515d6de84d24c73f1a482dbfbb06c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6d78a14a044c4c3c340c5bbcd8a983a6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c3e3a605177b62220a6ce7f2d287f0f8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0fdd42012e179810fb0afe9d339bab22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_504ff4e4971f2f1e8202618536aaa8c3 |
| publicationDate | 2019-04-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2019119175-A1 |
| titleOfInvention | Method for producing soluble potassium sulfate |
| abstract | The invention relates to a method for producing for producing soluble potassium sulfate by recrystallization of crude potassium sulfate wherein the crude potassium sulfate contains an amount of potassium, calculated as K2O of about 15 wt % or higher preferably about 40 wt % or higher and has either more than about 0.07 wt % insoluble material, and/or a dissolution speed wherein at 3 min dissolution of 100 gram product in 1 L cold water (20° C.), without stirring the amount of dissolved potassium sulfate of less than about 90% and/or a pH of about 6 or higher as a 1% dissolved crude potassium sulfate, wherein the method comprises the following steps: crude potassium sulfate is dissolved, the dissolved potassium sulfate is subjected to a solid material removal step, potassium sulfate is crystallized, while optionally an acid is provided before, during or after the crystallization step of the potassium sulfate and whereafter the obtained potassium sulfate is separated and dried, wherein the particle size of the crystalline material is controlled to be within the ranges provided, optionally with sieving and/or grinding, preferably by sieving, such that the resulting potassium sulfate crystalline material conforms with the following characteristics: the amount of insoluble material is less than about 0.05 wt %, a 1 wt % solution of the potassium sulfate has a pH below about 6, and/or 1 pH unit lower than the pH of the crude potassium sulfate, the fraction obtained after crystallization has an average particle size within the following parameters: (i) d90<about 0.6 mm, (ii) d10>about 0.02 mm, and (iii) dust amounts to about 0.4 wt % or less, whereby the potassium sulfate contains more than 51% potassium, calculated as K2O. |
| priorityDate | 2016-03-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 109.