| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4c398892c36ca88de7755044897232b2 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2367-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02W30-62 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-29
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-84
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-82
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J11-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J11-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J11-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-52 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J11-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L67-02 |
| filingDate |
2020-08-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_295954e92bb2d2912e4aad365e4bc645
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f05669068c9667d0e80cbd0ffa8b8bba |
| publicationDate |
2022-06-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-4013814-A1 |
| titleOfInvention |
Polymer recycling |
| abstract |
A method for recycling polyethylene terephthalate (PET) to produce bis(2-hydroxyethyl) terephthalate (BHET) comprises the steps of (a) depolymerising PET in the presence of ethylene glycol and a catalyst system in a series of preferably two depolymerisation reactors to form a depolymerised mixture comprising BHET; (b) crystallising a precipitate comprising BHET from the depolymerised mixture; (c) dissolving the precipitate in a protic solvent, preferably water, but also optionally methanol, to form a solution comprising BHET; (d) removing impurities from the solution to form a purified solution comprising BHET; and (e) crystallising a purified product comprising BHET from the purified solution. Suitable apparatus for such a method, and the use of urea in a catalyst system therefor, are also provided. |
| priorityDate |
2019-08-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |