| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b62a061db267544224c10495ee0cd640 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C39-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-055
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-74
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C39-19
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F12-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-72
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-01
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-685
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F12-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F212-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F212-24 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C39-19
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F12-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F212-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-01
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-74
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C39-20 |
| filingDate |
2021-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9cddf67197bdf843c74a0a10017f4612
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_79893dc684c39b42e9adfcde46b12e89
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2992361a974b772da75d40b7e50b663a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_77b7c2cb705e7dae31decdcb2063916c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_db5f49c967ca392b46409065d5bed0be
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c7f372100d0bd8eccf650d34baed9c36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_883d3a29ac772d2b3b5a993b55f38b85 |
| publicationDate |
2021-12-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-2021256551-A1 |
| titleOfInvention |
High-purity 4-hydroxystyrene solution, production method therefor, and production method for 4-hydroxystyrene-based polymer |
| abstract |
[Problem] To provide: a 4-hydroxystyrene solution that is preferable as a raw material for commercial-scale production of 4-hydroxystyrene-based polymers, and has a high purity and good storage stability; and a production method for the solution. [Solution] The production method for a 4-hydroxystyrene solution according to the present invention comprises steps (i)-(iv): (i) a deprotection step for bringing 4-acetoxystyrene into contact with a base in a solvent to generate 4-hydroxystyrene; (ii) a neutralization step for neutralizing the deprotected solution containing 4-hydroxystyrene by adding an acid to the solution; (iii) a step for washing the neutralized solution containing 4-hydroxystyrene with water; and (iv) a solvent substitution step for adding a solvent in which 4-hydroxystyrene can dissolve to the solution containing 4-hydroxystyrene, and performing distillation at 40°C or lower to remove excess solvent and components other than 4-hydroxystyrene. |
| priorityDate |
2020-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |