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

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).

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Document Details

Document Type
Technical Report
Publication Date
Dec 21, 2016
Accession Number
AD1029431

Entities

People

  • Darren L. Williams

Organizations

  • Sam Houston State University

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Alkenes
  • Chemical Synthesis
  • Chemistry
  • Climate Change
  • Fish
  • Health Services
  • Medical Personnel
  • Organic Chemistry

Readers

  • Groundwater Contamination Remediation.
  • Petroleum Engineering