Process for the purification of mixtures of toluenediisocyanate
The invention relates to a process for the purification of toluenediisocyanate by fractionating a crude distillation feed comprising toluenediisocyante, an organic solvent and less than 2% by weight of phosgene in a heat integrated system comprising an upstream distillation column (1), an interchang...
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| creator | DALLMEYER HERMANN,NOMMENSEN OVE,LOKUM HEINRICH |
| description | The invention relates to a process for the purification of toluenediisocyanate by fractionating a crude distillation feed comprising toluenediisocyante, an organic solvent and less than 2% by weight of phosgene in a heat integrated system comprising an upstream distillation column (1), an interchanger (8) and a downstream distillation column (4) which are connected in series, whereby the vapor which is recovered from the upstream distillation column (1) is used to reboil the bottoms product of the downstream distillation column (4) or the feed to the downstream distillation column (4) in the interchanger (8), and whereby the crude distillation feed comprising less than 2% by weight of phosgene is fractionated into three product fractions P1 - P3 and optionally a fourth fraction P4, whereby P1 is a noncondensible gas stream enriched with phosgene and/or low-boilers, P2 is a solvent -enriched product, P3 is a high boiler enriched bottoms product comprising toluenediisocyanate and P4 is a toluenediisocyanate enriched stream lean in highboilers and reaction residues. |
| format | Patent |
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P3 and optionally a fourth fraction P4, whereby P1 is a noncondensible gas stream enriched with phosgene and/or low-boilers, P2 is a solvent -enriched product, P3 is a high boiler enriched bottoms product comprising toluenediisocyanate and P4 is a toluenediisocyanate enriched stream lean in highboilers and reaction residues.</description><language>eng</language><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS ; CHEMISTRY ; CRACKING HYDROCARBON OILS ; FUELS ; LUBRICANTS ; METALLURGY ; MINERAL WAXES ; ORGANIC CHEMISTRY ; PEAT ; PERFORMING OPERATIONS ; PETROLEUM, GAS OR COKE INDUSTRIES ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION ; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES ; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS ; REFORMING OF NAPHTHA ; SEPARATION ; TECHNICAL GASES CONTAINING CARBON MONOXIDE ; TRANSPORTING</subject><creationdate>2006</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20060201&DB=EPODOC&CC=CN&NR=1239475C$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,777,882,25545,76296</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20060201&DB=EPODOC&CC=CN&NR=1239475C$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>DALLMEYER HERMANN,NOMMENSEN OVE,LOKUM HEINRICH</creatorcontrib><title>Process for the purification of mixtures of toluenediisocyanate</title><description>The invention relates to a process for the purification of toluenediisocyanate by fractionating a crude distillation feed comprising toluenediisocyante, an organic solvent and less than 2% by weight of phosgene in a heat integrated system comprising an upstream distillation column (1), an interchanger (8) and a downstream distillation column (4) which are connected in series, whereby the vapor which is recovered from the upstream distillation column (1) is used to reboil the bottoms product of the downstream distillation column (4) or the feed to the downstream distillation column (4) in the interchanger (8), and whereby the crude distillation feed comprising less than 2% by weight of phosgene is fractionated into three product fractions P1 - P3 and optionally a fourth fraction P4, whereby P1 is a noncondensible gas stream enriched with phosgene and/or low-boilers, P2 is a solvent -enriched product, P3 is a high boiler enriched bottoms product comprising toluenediisocyanate and P4 is a toluenediisocyanate enriched stream lean in highboilers and reaction residues.</description><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS</subject><subject>CHEMISTRY</subject><subject>CRACKING HYDROCARBON OILS</subject><subject>FUELS</subject><subject>LUBRICANTS</subject><subject>METALLURGY</subject><subject>MINERAL WAXES</subject><subject>ORGANIC CHEMISTRY</subject><subject>PEAT</subject><subject>PERFORMING OPERATIONS</subject><subject>PETROLEUM, GAS OR COKE INDUSTRIES</subject><subject>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</subject><subject>PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION</subject><subject>RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES</subject><subject>REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS</subject><subject>REFORMING OF NAPHTHA</subject><subject>SEPARATION</subject><subject>TECHNICAL GASES CONTAINING CARBON MONOXIDE</subject><subject>TRANSPORTING</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2006</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLAPKMpPTi0uVkjLL1IoyUhVKCgtykzLTE4syczPU8hPU8jNrCgpLUotBrFL8nNKU_NSUzIzi_OTKxPzEktSeRhY0xJzilN5oTQ3g4Kba4izh25qQX58anFBYjJQQ0m8s5-hkbGlibmps7MxEUoAfSsxZA</recordid><startdate>20060201</startdate><enddate>20060201</enddate><creator>DALLMEYER HERMANN,NOMMENSEN OVE,LOKUM HEINRICH</creator><scope>EVB</scope></search><sort><creationdate>20060201</creationdate><title>Process for the purification of mixtures of toluenediisocyanate</title><author>DALLMEYER HERMANN,NOMMENSEN OVE,LOKUM HEINRICH</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CN1239475CC3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2006</creationdate><topic>ACYCLIC OR CARBOCYCLIC COMPOUNDS</topic><topic>CHEMISTRY</topic><topic>CRACKING HYDROCARBON OILS</topic><topic>FUELS</topic><topic>LUBRICANTS</topic><topic>METALLURGY</topic><topic>MINERAL WAXES</topic><topic>ORGANIC CHEMISTRY</topic><topic>PEAT</topic><topic>PERFORMING OPERATIONS</topic><topic>PETROLEUM, GAS OR COKE INDUSTRIES</topic><topic>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</topic><topic>PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION</topic><topic>RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES</topic><topic>REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS</topic><topic>REFORMING OF NAPHTHA</topic><topic>SEPARATION</topic><topic>TECHNICAL GASES CONTAINING CARBON MONOXIDE</topic><topic>TRANSPORTING</topic><toplevel>online_resources</toplevel><creatorcontrib>DALLMEYER HERMANN,NOMMENSEN OVE,LOKUM HEINRICH</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>DALLMEYER HERMANN,NOMMENSEN OVE,LOKUM HEINRICH</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Process for the purification of mixtures of toluenediisocyanate</title><date>2006-02-01</date><risdate>2006</risdate><abstract>The invention relates to a process for the purification of toluenediisocyanate by fractionating a crude distillation feed comprising toluenediisocyante, an organic solvent and less than 2% by weight of phosgene in a heat integrated system comprising an upstream distillation column (1), an interchanger (8) and a downstream distillation column (4) which are connected in series, whereby the vapor which is recovered from the upstream distillation column (1) is used to reboil the bottoms product of the downstream distillation column (4) or the feed to the downstream distillation column (4) in the interchanger (8), and whereby the crude distillation feed comprising less than 2% by weight of phosgene is fractionated into three product fractions P1 - P3 and optionally a fourth fraction P4, whereby P1 is a noncondensible gas stream enriched with phosgene and/or low-boilers, P2 is a solvent -enriched product, P3 is a high boiler enriched bottoms product comprising toluenediisocyanate and P4 is a toluenediisocyanate enriched stream lean in highboilers and reaction residues.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY CRACKING HYDROCARBON OILS FUELS LUBRICANTS METALLURGY MINERAL WAXES ORGANIC CHEMISTRY PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS REFORMING OF NAPHTHA SEPARATION TECHNICAL GASES CONTAINING CARBON MONOXIDE TRANSPORTING |
| title | Process for the purification of mixtures of toluenediisocyanate |
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