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filingDate 2008-06-09-04:00^^<http://www.w3.org/2001/XMLSchema#date>
grantDate 2011-12-07-04:00^^<http://www.w3.org/2001/XMLSchema#date>
inventor http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_70c0cc57ae9a5879d48e3e6758d34010
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publicationDate 2011-12-07-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber EP-2167456-B1
titleOfInvention Method for the recovery of mineral acids in a process for producing diphenylmethane diamine
abstract The invention relates to a method for the recovery of diphenylmethane diamine, comprising the steps of A) reaction of aniline with formaldehyde in the presence of a mineral acid, B) neutralization of the mineral acid with a base, C) separation of the organic and inorganic phase, D) removal of the base from the inorganic phase by adsorption, c) recovery of the mineral acid.
priorityDate 2007-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date>
type http://data.epo.org/linked-data/def/patent/Publication

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