Abstract: The present invention relates to a process of separating chiral isomers of chroman compounds, particularly tocopherols and tocotrienols as well as the esters and intermediates thereof. It has been found that this process allows a separation of the desired isomer with a higher yield and enables the use of the non-desired isomers in a very efficient way. Said process is particularly useful when implemented in an industrial process. Furthermore, it has been found that this process allows using isomer mixtures as they result from traditional industrial synthesis.
Type:
Application
Filed:
May 8, 2012
Publication date:
June 5, 2014
Applicant:
DSM IP ASSETTS B.V.
Inventors:
Gerhard Schiefer, Thomas Netscher, Alexander Lucia Leonardus Duchateau
Abstract: The invention relates to an electrical circuit breaker comprising an arc formation chamber and an arc extinguishing chamber, the arc formation chamber being at least partially bounded by a side flange or at least a part of a side wall consisting of a polymeric composition comprising a thermoplastic polymer, a triazine based flame retardant, at most 0-5 wt. % of phosphorous or halogen containing flame retardants, and 0-15 wt. % of a reinforcing agent, wherein thermoplastic polymer comprises a polyamide with a melting temperature of at least 260° C. and the triazine based flame retardant comprises at least 20 wt. % of melam, wherein the weight percentages (wt. %) are relative to the total weight of the polymeric composition.
Type:
Application
Filed:
June 17, 2011
Publication date:
August 8, 2013
Applicant:
DSM IP ASSETTS B.V.
Inventors:
Rob Joseph Catharina Emiel Demandt, Johannes Hoekstra, Robert Hendrik Catharina Janssen
Abstract: The invention relates to a process for preparing filamentous fungal strains having a sexual cycle, wherein an acceptor filamentous fungal strain, having no or one type MAT locus, is subjected to recombination in which one or more mating type locus genes and optionally sex related genes, from other species than the acceptor filamentous fungal strain, is introduced into the acceptor filamentous fungal strain to produce a filamentous fungal strain having a sexual cycle.
Type:
Application
Filed:
January 12, 2011
Publication date:
January 10, 2013
Applicant:
DSM IP ASSETTS, B.V.
Inventors:
Peter Jozef Ida Van De Vondervoort, Herman Jan Pel, Paul Stanley Dyer
Abstract: The present invention relates to modified mevalonate kinases that are less sensitive to feedback inhibition, and to polynucleotides encoding them. The invention further pertains to vectors comprising these polynucleotides and host cells containing such vectors. The invention provides a method for producing the modified enzyme and a method for producing isoprenoid compounds.
Type:
Grant
Filed:
June 10, 2004
Date of Patent:
September 9, 2008
Assignee:
DSM IP Assetts B.V.
Inventors:
Renyuan Bai, Markus Huembelin, Martin Lehmann, Rual Lopez-Ulibarri, Markus Wyss
Abstract: Astaxanthin derivatives of the general formula (I) wherein R is in each case group —NH—CH(R1)—COOR2, —OR3 or —(Y)n-Z and R1, R2, R3, Y, Z and n are significances given in detail in the description, are novel compounds with improved stability during extrusion at the elevated temperatures as required in feed manufacture and during the storage of the manufactured feed and which accordingly are useful as pigmenting carotinoids for feed for aquatic animals. The derivatives are produced by reacting astaxanthin with the pertinent acid RCOOH as such or as its acid chloride RCOC1 or acid anhydride (RCO)2O, or, in the cases where R signifies a group —NH—CH(R1)—COOR2, with the appropriate N-carbonyl-amino acid ester of the formula OCNCH(R1)COOR2.