| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b26fed8cbb33a52c843e37f5dd82aa16 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10N2040-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10N2040-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10N2040-50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10N2040-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10N2040-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10N2040-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10N2040-38
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10N2040-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10N2040-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10N2040-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10N2040-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2203-06 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M105-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2-861 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C10M105-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C2-86 |
| filingDate |
1980-09-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate |
1982-04-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
NL-8004979-A |
| titleOfInvention |
METHOD FOR PREPARING STRONG VACUUM OILS |
| abstract |
Prodn. of a high-vacuum oil (I) is effected by (a) alkylating an aromatic hydrocarbon (II) with one or more 8-12C normal sec. alkylchlorides (III) in the presence of 2-15 mol.% AlCl3 (based on (III)) at 20-100 deg.C until evolution of HCl ceases, (b)sepg. catalyst from alkylate, and (c) distilling the alkylate under vacuum to recover the fraction boiling at 220-250 deg.C/0.2-0.3 mm Hg as (I). (II) may comprise a condensed and/or non-condensed aromatic hydrocarbon. The (III):(II) mol. ratio is 2.5-5:1. (I) is used as a working medium in vacuum diffusion pumps, providing a vacuum of 3 x 10 power (-8) mm Hg in unbaked systems without N2 traps and 2-5x10 power (-9) mm Hg in baked systems without N2 traps. It has a low congealing temp. a low proper vapour tension (of the order of 10 power (-10) mm Hg) and relatively high flowability at room temp. The starting materials are relatively inexpensive. |
| priorityDate |
1980-09-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |