Process for preparing methylenedianiline and methylenebis (phenylisocyanate)
A process for preparing methylenedianiline by reacting aniline with formaldehyde in the presence of acid catalysts comprising, in a semicontinuous process, introducing aniline with or without acid catalyst, feeding formaldehyde with or without acid catalyst through a mixing element into a circuit in...
Gespeichert in:
| Hauptverfasser: | , , , , , , |
|---|---|
| Format: | Patent |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | |
|---|---|
| container_issue | |
| container_start_page | |
| container_title | |
| container_volume | |
| creator | SEYFERT WILFRIED JACOBS JAN SCHWEERS OLAF STROFER ECKHARD PENZEL ULRICH SCHWARZ HANS VOLKMAR SCHARR VOLKER |
| description | A process for preparing methylenedianiline by reacting aniline with formaldehyde in the presence of acid catalysts comprising, in a semicontinuous process, introducing aniline with or without acid catalyst, feeding formaldehyde with or without acid catalyst through a mixing element into a circuit in which aniline with or without acid catalyst and with or without previously added formaldehyde is circulated and, after feeding in at least 50% of the total amount of formaldehyde to be fed in, heating the reaction mixture to a temperature above 75° C. In addition, the invention relates to a process for preparing polyisocyanates by phosgenation of amines obtainable in this manner and to the polyisocyanates obtainable by this process. |
| format | Patent |
| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_US2005014975A1</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>US2005014975A1</sourcerecordid><originalsourceid>FETCH-epo_espacenet_US2005014975A13</originalsourceid><addsrcrecordid>eNrjZPAJKMpPTi0uVkjLL1IoKEotSCzKzEtXyE0tyajMSc1LTclMzMvMycxLVUjMS0EIJ2UWK2gUZKTmVeZkFucnVybmJZakavIwsKYl5hSn8kJpbgZlN9cQZw_d1IL8-NTigsRkoNaS-NBgIwMDUwNDE0tzU0dDY-JUAQDkWzec</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>Process for preparing methylenedianiline and methylenebis (phenylisocyanate)</title><source>esp@cenet</source><creator>SEYFERT WILFRIED ; JACOBS JAN ; SCHWEERS OLAF ; STROFER ECKHARD ; PENZEL ULRICH ; SCHWARZ HANS VOLKMAR ; SCHARR VOLKER</creator><creatorcontrib>SEYFERT WILFRIED ; JACOBS JAN ; SCHWEERS OLAF ; STROFER ECKHARD ; PENZEL ULRICH ; SCHWARZ HANS VOLKMAR ; SCHARR VOLKER</creatorcontrib><description>A process for preparing methylenedianiline by reacting aniline with formaldehyde in the presence of acid catalysts comprising, in a semicontinuous process, introducing aniline with or without acid catalyst, feeding formaldehyde with or without acid catalyst through a mixing element into a circuit in which aniline with or without acid catalyst and with or without previously added formaldehyde is circulated and, after feeding in at least 50% of the total amount of formaldehyde to be fed in, heating the reaction mixture to a temperature above 75° C. In addition, the invention relates to a process for preparing polyisocyanates by phosgenation of amines obtainable in this manner and to the polyisocyanates obtainable by this process.</description><edition>7</edition><language>eng</language><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS ; APPARATUS THEREFOR ; CHEMISTRY ; GENERAL METHODS OF ORGANIC CHEMISTRY ; METALLURGY ; ORGANIC CHEMISTRY</subject><creationdate>2005</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=20050120&DB=EPODOC&CC=US&NR=2005014975A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20050120&DB=EPODOC&CC=US&NR=2005014975A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SEYFERT WILFRIED</creatorcontrib><creatorcontrib>JACOBS JAN</creatorcontrib><creatorcontrib>SCHWEERS OLAF</creatorcontrib><creatorcontrib>STROFER ECKHARD</creatorcontrib><creatorcontrib>PENZEL ULRICH</creatorcontrib><creatorcontrib>SCHWARZ HANS VOLKMAR</creatorcontrib><creatorcontrib>SCHARR VOLKER</creatorcontrib><title>Process for preparing methylenedianiline and methylenebis (phenylisocyanate)</title><description>A process for preparing methylenedianiline by reacting aniline with formaldehyde in the presence of acid catalysts comprising, in a semicontinuous process, introducing aniline with or without acid catalyst, feeding formaldehyde with or without acid catalyst through a mixing element into a circuit in which aniline with or without acid catalyst and with or without previously added formaldehyde is circulated and, after feeding in at least 50% of the total amount of formaldehyde to be fed in, heating the reaction mixture to a temperature above 75° C. In addition, the invention relates to a process for preparing polyisocyanates by phosgenation of amines obtainable in this manner and to the polyisocyanates obtainable by this process.</description><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS</subject><subject>APPARATUS THEREFOR</subject><subject>CHEMISTRY</subject><subject>GENERAL METHODS OF ORGANIC CHEMISTRY</subject><subject>METALLURGY</subject><subject>ORGANIC CHEMISTRY</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2005</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZPAJKMpPTi0uVkjLL1IoKEotSCzKzEtXyE0tyajMSc1LTclMzMvMycxLVUjMS0EIJ2UWK2gUZKTmVeZkFucnVybmJZakavIwsKYl5hSn8kJpbgZlN9cQZw_d1IL8-NTigsRkoNaS-NBgIwMDUwNDE0tzU0dDY-JUAQDkWzec</recordid><startdate>20050120</startdate><enddate>20050120</enddate><creator>SEYFERT WILFRIED</creator><creator>JACOBS JAN</creator><creator>SCHWEERS OLAF</creator><creator>STROFER ECKHARD</creator><creator>PENZEL ULRICH</creator><creator>SCHWARZ HANS VOLKMAR</creator><creator>SCHARR VOLKER</creator><scope>EVB</scope></search><sort><creationdate>20050120</creationdate><title>Process for preparing methylenedianiline and methylenebis (phenylisocyanate)</title><author>SEYFERT WILFRIED ; JACOBS JAN ; SCHWEERS OLAF ; STROFER ECKHARD ; PENZEL ULRICH ; SCHWARZ HANS VOLKMAR ; SCHARR VOLKER</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US2005014975A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2005</creationdate><topic>ACYCLIC OR CARBOCYCLIC COMPOUNDS</topic><topic>APPARATUS THEREFOR</topic><topic>CHEMISTRY</topic><topic>GENERAL METHODS OF ORGANIC CHEMISTRY</topic><topic>METALLURGY</topic><topic>ORGANIC CHEMISTRY</topic><toplevel>online_resources</toplevel><creatorcontrib>SEYFERT WILFRIED</creatorcontrib><creatorcontrib>JACOBS JAN</creatorcontrib><creatorcontrib>SCHWEERS OLAF</creatorcontrib><creatorcontrib>STROFER ECKHARD</creatorcontrib><creatorcontrib>PENZEL ULRICH</creatorcontrib><creatorcontrib>SCHWARZ HANS VOLKMAR</creatorcontrib><creatorcontrib>SCHARR VOLKER</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>SEYFERT WILFRIED</au><au>JACOBS JAN</au><au>SCHWEERS OLAF</au><au>STROFER ECKHARD</au><au>PENZEL ULRICH</au><au>SCHWARZ HANS VOLKMAR</au><au>SCHARR VOLKER</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Process for preparing methylenedianiline and methylenebis (phenylisocyanate)</title><date>2005-01-20</date><risdate>2005</risdate><abstract>A process for preparing methylenedianiline by reacting aniline with formaldehyde in the presence of acid catalysts comprising, in a semicontinuous process, introducing aniline with or without acid catalyst, feeding formaldehyde with or without acid catalyst through a mixing element into a circuit in which aniline with or without acid catalyst and with or without previously added formaldehyde is circulated and, after feeding in at least 50% of the total amount of formaldehyde to be fed in, heating the reaction mixture to a temperature above 75° C. In addition, the invention relates to a process for preparing polyisocyanates by phosgenation of amines obtainable in this manner and to the polyisocyanates obtainable by this process.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext_linktorsrc |
| identifier | |
| ispartof | |
| issn | |
| language | eng |
| recordid | cdi_epo_espacenet_US2005014975A1 |
| source | esp@cenet |
| subjects | ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY |
| title | Process for preparing methylenedianiline and methylenebis (phenylisocyanate) |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-24T19%3A35%3A22IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-epo_EVB&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=SEYFERT%20WILFRIED&rft.date=2005-01-20&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3EUS2005014975A1%3C/epo_EVB%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |