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公开(公告)号:JP4312609B2
公开(公告)日:2009-08-12
申请号:JP2003582120
申请日:2003-04-09
Applicant: ビーエーエスエフ ソシエタス・ヨーロピアBasf Se
Inventor: オッターバッハ アンドレアス , シュミット アンドレアス , シュタロスタ ディーター , クラーゼ フォルカー , プファープ ペーター , クレッツァー マティアス
IPC: C07C263/04 , B01J10/00 , B01J19/00 , C07C265/14 , F28D9/00
CPC classification number: F28D9/00 , B01J10/00 , B01J19/0013 , B01J2219/00085 , C07C263/04 , C07C265/00
Abstract: A reactor for the thermal cleavage of monofunctional and/or polyfunctional carbamic esters into the corresponding isocyanate and hydroxyl components in the liquid phase having devices for introduction of heat into the reactor, where the devices are heat exchanger plates through which a heat transfer medium flows and have a geometry defined by the ratio of the degassing area to the volume and arrangement of the heating surfaces which makes it possible for the cleavage to be carried out in a two-phase mixture which has a gas content of over 50% by volume.
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公开(公告)号:JP2009507886A
公开(公告)日:2009-02-26
申请号:JP2008530480
申请日:2006-09-05
Applicant: ビーエーエスエフ ソシエタス・ヨーロピアBasf Se
Inventor: シュミット アンドレアス , シュトレーファー エックハルト , クラーゼ フォルカー , シェルベル ペーター , クレッツァー マティアス
IPC: C07C263/04 , C07B61/00 , C07C265/14
CPC classification number: C07C263/04 , C07C269/04 , C07C271/12 , C07C265/14
Abstract: The invention provides a multistage process for continuously preparing organic, distillable polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding organic polyamines with carbonic acid derivatives and alcohols to low molecular mass monomeric polyurethanes, and thermally cleaving said polyurethanes, in which at defined reaction stages the polyisocyanates prepared and unusable residues are separated off, and reusable by products and intermediates are recycled to upstream stages.
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