http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105294403-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C39-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-16 |
| filingDate | 2015-09-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2017-09-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2017-09-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-105294403-B |
| titleOfInvention | A kind of preparation technology of tert-butylhydroquinone |
| abstract | The present invention relates to antioxidant preparation method technical field, more particularly to a kind of preparation technology of tert-butylhydroquinone, comprise the following steps：1) equimolar hydroquinones and tert-butyl acetate are taken using excessive dilute sulfuric acid, then, while reactor is added, wherein, the weight ratio of dilute sulfuric acid and tert-butyl acetate is 1:3‑6；2) 85 95 DEG C are warming up under stirring, is reacted 18 hours；3) stirring is stopped, it is cooled to centrifugal filtration after 65 75 DEG C, filtrate sulfuric acid carries out recycle and reuse, gained filter residue is washed with 13 times of warm water, obtain the crude product of tert-butylhydroquinone, compared with prior art, the present invention uses hydroquinones and tert-butyl acetate for raw material, catalyst and reaction dissolvent are used as using dilute sulfuric acid, promote the progress of reaction, tertiary butyl is provided with tert-butyl acetate, reduce the generation of side reaction, containing TBHQ up to 70% 75% in crude product, accessory substance DTBHQ contents are low, yield after purification is up to 65 70%, substantially increase yield, generate huge economic benefit. |
| priorityDate | 2015-09-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 46.