The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2015
Filed:
Dec. 07, 2009
Klaus Biskup, Buichholz, DE;
Rainer Bruns, Leverkusen, DE;
Wolfgang Lorenz, Dormagen, DE;
Fritz Pohl, Brunsbuttel, DE;
Friedhelm Steffens, Leverkusen, DE;
Volker Michele, Cologne, DE;
Klaus Biskup, Buichholz, DE;
Rainer Bruns, Leverkusen, DE;
Wolfgang Lorenz, Dormagen, DE;
Fritz Pohl, Brunsbuttel, DE;
Friedhelm Steffens, Leverkusen, DE;
Volker Michele, Cologne, DE;
Bayer MaterialScience AG, Leverkusen, DE;
Abstract
Aromatic isocyanates are produced by reacting one or more aromatic primary amines with phosgene in the gas phase. The phosgene and primary aromatic amine(s) are reacted at a temperature above the boiling temperature of the amine(s) in a reactor having a reaction space which is essentially rotationally symmetric to the direction of flow. The flow fate, averaged over the cross-section, of the reaction mixture along the axis of the essentially rotationally symmetric reaction space in the section of the reaction space in which the conversion of the amine groups into isocyanate groups is between 4 and 80% is not more than 8 m/sec. The flow rate averaged over the cross-section of the reaction mixture along the axis of the essentially rotationally symmetric reaction space in the section of the reaction space in which the conversion of the amine groups into isocyanate groups is 4 to 80% is always below the flow rate averaged over the cross-section at the start of this section.