Browse Prior Art Database

Heat Transfer Fluid Synthesis

IP.com Disclosure Number: IPCOM000076496D
Original Publication Date: 1972-Mar-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Anschel, M: AUTHOR

Abstract

The synthetic procedure outlined below for the manufacture of perfluorinated heat transfer fluids is designed to make possible the use of inexpensive, highly compatible, fluorochemical heat transfer fluids for core storage, power supply and other electrical apparatus applications. Such fluids are preferable to chlorofluoro liquids in certain applications.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 93% of the total text.

Page 1 of 2

Heat Transfer Fluid Synthesis

The synthetic procedure outlined below for the manufacture of perfluorinated heat transfer fluids is designed to make possible the use of inexpensive, highly compatible, fluorochemical heat transfer fluids for core storage, power supply and other electrical apparatus applications. Such fluids are preferable to chlorofluoro liquids in certain applications.

Chlorofluoro liquids, e.g. trichlorotrifluoroethane, have been demonstrated to have greater solvency interaction with thermoplastic and elastromeric materials when compared to perfluorinated fluids. Moreover, chlorofluoro liquids can be thermally unstable and are known to react with metals (e.g., copper, zinc, steel) via chlorine elimination modes resulting in the formation of metal chlorides and chlorofluoro olefins, viz.,

(Image Omitted)

Metals such as lead, magnesium, aluminum and phosphorus nucleophiles can possibly also effect the above elimination reactions.

Bis-(trifluoromethyl) hexafluorocyclobutane (I), a highly stable perfluorinated fluid, may be prepared by catalytic fluorination of 1,2-dichloropropane followed by zinc reduction. The 1,2-dichloropropane is a relatively low cost by-product of the chlorohydrin process to propylene oxide. The overall synthesis would involve the following steps:

(Image Omitted)

The low cost of the starting material helps to reduce the cost of this perfluorinated system, permitting its consideration in practical applications where high compati...