Accession Number : AD1029431


Title :   Development of Azeotropic Blends to Replace TCE and nPB in Vapor Degreasing Operations


Descriptive Note : Technical Report,01 Sep 2014,01 Jan 2017


Corporate Author : Sam Houston State University Huntsville United States


Personal Author(s) : Williams ,Darren L


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1029431.pdf


Report Date : 21 Dec 2016


Pagination or Media Count : 370


Abstract : Azeotropic blends that have similar properties as trichloroethylene (TCE) and n-propyl bromide (nPB) but without undesirable environmental, occupational, safety, and health properties were tested as sustainable drop-in replacements for TCE and nPB in vapor phase cleaning operations. No fluids in this study cleaned grease or solder flux residue as well as TCE or nPB. Seven new azeotropic blends were discovered during this project. Four azeotropes failed the flash point test. One failed the vial-based screening test against marine-grade grease. Two of the azeotropic blends survived the flashpoint and solvency screening tests. They are designated AZ6 (80% Suprion, 20% p-chlorobenzotrifluoride, Tb = 11 deg C) and AZ7 (65% HFE-7500, 35% p-chlorobenzotrifluoride, Tb = 125 deg C).


Descriptors :   chemical products , RAMAN SPECTROSCOPY , vapors , AZEOTROPES , SOLVENTS , CLEANING


Subject Categories : Physical Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE