http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CS-195128-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e21bc9891b53e34fd615e3da7875cd8a http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5d8b2a01d3bcf2381d8be0f681e7edea http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_94cc960ba91dc3d900052ded34000592 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D237-06 |
| filingDate | 1977-10-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_00a488234161438a101df31d1c4d8b20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ae1fa53a4fcb1266d37bfc81415213c0 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d53e4a6c394fafb88099d88805891d78 |
| publicationDate | 1980-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CS-195128-B1 |
| titleOfInvention | Process for preparing 4,5-dichloro-2-phenylpyridazin-3-one |
| abstract | The invention relates to a process for the preparation of 4,5-dichloro-2-phenylpyridazin-3-onenfrom basicnaniline raw materials without technical isolationnor phenylhydrazine hydrochloridencondensation with mucochloric acidndirectly in the presence i. reaction gasesnresulting from the synthesis of phenylhydrazinenhydrochloride.nSaid substances are intermediates in productionn5-amino-4-chloro-2-phenyl-pyridazin-3-one,nwhich is a biologically active component of a selectivena herbicidal preparation for treatmentnsugar beet.nAccording to known patents and manufacturingnThese processes were not necessary for production purposesn4,5-dichloro-2-phenylpyridazin-3-one is isolatednphenylhydrazine or phenylhydrazine hydrochloride,nwhile being removed by separationnprocesses of the reaction fumes.nThese disadvantages eliminate the manufacturing processn4,5-dichloro-2-phenylpyridazin-3-one by diazotizationnaniline, by reducing the resulting benzenediazonium chloridenacidic solution andnnormal sodium sulfite and hydrolysisnphenylhydrazine disulfonate with sodium acidnsaline, the essence of which is thatnreaction of phenylpyridazine hydrochloride with an acidnmucochloride dissolved directlynin the reaction solution is converted in the presencenthe resulting reaction fumes in a solution of ona concentration of 2.5 to 3.5 wt. phenylhydrazinenhydrochloride.nThe advantage of this process is a reductionnnumber of operations in the preparation of phenylhydrazinenhydrochloride after hydrolysis, sieving andncrystallization of phenylhydrazine hydrochloride »ndissolving and preparing a solution for condensation2nwith mucochloric acid, thereby formingnin industrial-production savings on investments,nenergy and labor force atnsubstantial increased recovery of basicnraw materials. The new way of production makes it essentialnreduction of phenylhydrazine hydro- *nchloride in wastewater, which u so farnknown methods of production hurt toxicologicallyndefective. |
| priorityDate | 1977-10-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.