Abstract: This disclosure relates to a static mixer (1) with a plurality of nozzles, and more generally, to a mixer and method of use thereof for mixing phosgene and amine with shaped jets or at least two rows of nozzles (15,16)where the second row (16) is used to enrich an area of deficit of the phosgene flow within the static reactive jet mixer (1). Configurations of enriching secondary flow include the use of concentric, eccentric, or offset jets of amine/phosgene, and the use of nozzles with different and regular geometries to help focus amine/phosgene to a specific area of the principal phosgene flow.
Type:
Application
Filed:
May 10, 2011
Publication date:
March 28, 2013
Applicant:
DOW GLOBAL TECHNOLOGIES LLC
Inventors:
Paul Aaron Gillis, Hua Bai, Joydeep Mukherjee, Sanjib Kumar Das Sharma, Jorg-Peter Gehrke
Abstract: The present invention relates to a process for preparing pentamethylene 1,5-diisocyanate, to pentamethylene 1,5-diisocyanate prepared in this way and to the use thereof.
Type:
Grant
Filed:
July 25, 2007
Date of Patent:
October 25, 2011
Assignee:
BASF Aktiengesellschaft
Inventors:
Martin Fiene, Eckhard Stroefer, Wolfgang Siegel, Stephan Freyer, Oskar Zelder, Gerhard Schulz
Abstract: The present invention relates to a process for preparing pentamethylene 1,5-diisocyanate, to pentamethylene 1,5-diisocyanate prepared in this way and to the use thereof.
Type:
Application
Filed:
July 25, 2007
Publication date:
November 26, 2009
Applicant:
BASF SE
Inventors:
Martin Fiene, Eckhard Stroefer, Wolfgang Siegel, Stephan Freyer, Oskar Zelder, Gerhard Schulz
Abstract: Isocyanates are produced by a) reacting at least one amine with phosgene, optionally in the presence of a solvent to produce the corresponding isocyanate and a stream containing hydrogen chloride, phosgene and optionally solvent, low-boiling compounds and inert substances is obtained, b) separating the stream containing hydrogen chloride, phosgene and optionally solvent, low-boiling compounds and inert substances in an at least two-stage sequence of absorption steps that includes (1) at least one isothermal absorption step and (2) at least one adiabatic absorption step, to obtain (i) a hydrogen chloride stream containing phosgene in concentrations of at most 0.5 wt. % (based on the weight of the hydrogen chloride stream) and (ii) a liquid phosgene stream, and c) recycling the liquid phosgene stream (ii) to the reaction of amine with phosgene.
Type:
Grant
Filed:
April 24, 2006
Date of Patent:
March 17, 2009
Assignees:
Bayer MaterialScience LLC, Bayer MaterialScience AG
Inventors:
Matthias Böhm, Wolfgang Lorenz, Bill L. Brady, Jr., Donald L. Pferdehirt
Abstract: A method for dehydrogenofluorination for transforming an aromatic carbamoyl fluoride into a corresponding isocyanate, is provided. The method includes subjecting a carbamoyl fluoride to a temperature not less than 80° C. in a solvent wherein the carbamoyl fluoride is in a dissolved or finely dispersed state in the solvent. The method is applicable to organic synthesis.
Abstract: A process for working up distillation residues from the synthesis of tolylene diisocyanate by reaction of the distillation residues with water comprises reacting the TDI distillation residues with water in a continuous or semicontinuous process in a backmixed reactor in the presence of hydrolysate.
Type:
Grant
Filed:
December 14, 2000
Date of Patent:
January 6, 2004
Assignee:
BASF Aktiengesellschaft
Inventors:
Hans Volkmar Schwarz, Markus Maurer, Michael Sander, Eckhard Ströfer, Rene Leuthold, Burghard Hantel, Siegfried Richter, Jörg Therre
Abstract: Starting material streams are mixed in a mixer (13) for the phosgenation of amines by a process in which the reaction product (3) is removed in a closed loop and the starting material streams (1.2) contain organic solvents. The main streams (1.1, 2.1) and/or part-streams (1.2, 2.2) of the starting materials (1, 2) come into contact with one another according to the countercurrent principle.
Abstract: The invention concerns a process for the preparation of acyl isocyanates which consists of reacting oxalyl chloride with a salt selected from the group consisting of hydrohalides and sulphates of carboxamides and/or carbamates, unsubstituted on nitrogen, then heating the reaction mixture at a temperature between 30.degree. and 150.degree. C. The process is suitable for preparation of acyl isocyanates with excellent yields in easy to control operational conditions.
Type:
Grant
Filed:
August 2, 1993
Date of Patent:
January 31, 1995
Assignees:
Societe Nationale des Poudres et Explosifs, Nippon Paint Co. Ltd.
Inventors:
Philippe Le Goff, Daniele Dewilde, Noriyuki Tsuboniwa, Satoshi Urano