EP 3774724 A1 20210217 - METHOD FOR RECOVERING DIISOCYANATES FROM DISTILLATION RESIDUES
Title (en)
METHOD FOR RECOVERING DIISOCYANATES FROM DISTILLATION RESIDUES
Title (de)
VERFAHREN ZUR RÜCKGEWINNUNG VON DIISOCYANATEN AUS DESTILLATIONSRÜCKSTÄNDEN
Title (fr)
PROCÉDÉ DE RÉCUPÉRATION DE DIISOCYANATES À PARTIR DE RÉSIDUS DE DISTILLATION
Publication
Application
Priority
- EP 18166140 A 20180406
- EP 2019058438 W 20190403
Abstract (en)
[origin: WO2019193073A1] The invention relates to a method for recovering monomer diisocyanates, which are solid at room temperature, from a distillation residue, said method comprising the following steps: (i) preparing at least one residue which contains diisocyanates, which are solid at room temperature, and (ii) separating the residue in at least one kneader-dryer, paddle-dryer and/or roller-dryer in the presence of less than 2 wt% bitumen, based on the mass of the residue prepared in step (i), into a gaseous portion, containing monomer diisocyanate that is solid at room temperature, and a brittle residue depleted of diisocyanate, which is solid at room temperature.
IPC 8 full level
C07C 263/20 (2006.01); C07C 265/14 (2006.01); F26B 11/12 (2006.01); F26B 11/16 (2006.01)
CPC (source: EP US)
C07C 263/20 (2013.01 - EP US); F26B 11/12 (2013.01 - EP US); C07C 265/12 (2013.01 - US)
Citation (search report)
See references of WO 2019193073A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3549931 A1 20191009; CN 111886222 A 20201103; EP 3774724 A1 20210217; US 2021024459 A1 20210128; WO 2019193073 A1 20191010
DOCDB simple family (application)
EP 18166140 A 20180406; CN 201980023144 A 20190403; EP 19713827 A 20190403; EP 2019058438 W 20190403; US 201917043117 A 20190403