RESEARCH ON SYNTHESIS OF 1000 F STABLE BASE FLUIDS
Abstract
Work continued on synthesis of intermediates for perfluoro-polyaromatic systems, as still offering the most promise for highly thermally stable base fluids. Specifically, effort was concentrated on (1) the synthesis of C6F6 via the electrochemical fluorination route from benzoyl chloride and (2) the preparation of a minimum one-pound sample of 1,4-dibromotetrafluorobenzene as a valuable difunctional building block. One successful series of fluorinations of benzoyl fluoride in the new 100-ampere Simons cell led to 5200 grams of crude fluorocarbon product containing some 2050 grams of the desired C6F11 COF. Using an impure C6F10, a maximum yield of 37.2% C6F6 at 12.2% conversion has been achieved in a defluorination furnace with a single heated zone. In the synthesis of 1,4-dibromotetrafluorobenzene, about three kilograms of 2,4,5-trifluoroaniline were prepared in a five-step synthesis starting from 2,5-dichloronitrobenzene. This is over three times the expected yield at this stage, and is a result of a 3-1/2-fold i proved yield in one of the five steps. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 17, 1961
- Accession Number
- AD0291973
Entities
People
- A.a. Hyatt
- G.j. O'neill
- J.w. Dale
Organizations
- Monsanto