David A. Caillet
Engineering at Balsawood Dr, Baton Rouge, LA
License number
Louisiana PE.0020375
Issued Date
Jan 25, 1983
Expiration Date
Mar 31, 2018
Category
Civil Engineer
Type
Chemical Engineer
Address
Address
2027 Balsawood Dr, Baton Rouge, LA 70816
Professional information
Process For Thermal Benzylic Bromination
US Patent:
2003010, Jun 5, 2003
Filed:
Dec 5, 2001
Appl. No.:
10/010404
Inventors:
Max Mortensen - Bend OR, US
Hassan Elnagar - Baton Rouge LA, US
Ranjit Roy - Baton Rouge LA, US
Robert Allen - Baton Rouge LA, US
David Caillet - Baton Rouge LA, US
Hassan Elnagar - Baton Rouge LA, US
Ranjit Roy - Baton Rouge LA, US
Robert Allen - Baton Rouge LA, US
David Caillet - Baton Rouge LA, US
International Classification:
C07C211/56, C07C069/76, C07C017/06
US Classification:
560/083000, 570/196000, 564/442000, 568/774000
Abstract:
A process for thermal benzylic bromination of a wide variety of benzylic compounds is described. Bromine is used as the bromination agent. Moderate temperatures are employed and the process can be used to produce in relatively pure form either mono- or dibrominated benzylic bromination products.
Preparation Of Tetrakis(Dihydrocarbylamino)Phosphonium Halide
US Patent:
5883296, Mar 16, 1999
Filed:
Feb 14, 1997
Appl. No.:
8/801051
Inventors:
John M. Power - Baton Rouge LA
Bruce C. Berris - Baton Rouge LA
David A. Caillet - Baton Rouge LA
Bruce C. Berris - Baton Rouge LA
David A. Caillet - Baton Rouge LA
Assignee:
Albermale Corporation - Richmond VA
International Classification:
C07F 902, C07F 922
US Classification:
564 12
Abstract:
A mixture is made from (i) a tris(dihydrocarbylamino) phosphoroamidite and/or a hydrohalide thereof, (ii) a strong base (e. g. , NaOH) in proportions of about 2. 0 to about 4. 0 moles of (ii) per mole of (i), and (iii) at least one solvent for the base (e. g. , H. sub. 2 O). To this mixture is added a hydrocarbyl monohalide (e. g. , EtBr) in proportions of about 1. 0 to about 3. 0 moles per mole of phosphoroamidite used in forming the initial mixture, and the resultant reaction produces tetrakis(dihydrocarbylamino)phosphonium halide. The process enables more efficient production of tetrakis(dihydrocarbylamino)phosphonium halides, and is capable of being effectively used in large scale production facilities while satisfying the economic constraints of commercial operations.