Waste handling: A study of tributyl phosphate compatibility with nonmetallic materials
The need for numerous seals, plastic tubing, instrument components, and miles of plastic pipe for transferring process waste streams containing tributyl phosphate (TBP) and petroleum solvents led to an investigation of compatibility. TBP is a solvent for many plastics and elastomers and causes softening, crazing, or cracking of most nonmetallics tested. In this regard it may be considered an external plasticizer for some polymers. TBP also is a surfactant in aqueous solution. Dimension changes and property changes associated with softening will preclude the use of some materials as gaskets. Teflon/trademark/ and Kalrez/trademark/ gaskets appear to be compatible with TBP. Mixed results were obtained with EPDM elastomers, but EPDM O-rings are less costly than Kalrez/trademark/ and are being applied in some areas. Exposure of CPVC rigid piping led to crazing and, ultimately, catastrophic stress cracking, thus precluding its use in the waste services described. High-density polyethylene and PVDF plastic piping were unaffected by the test exposures and are useable for process and process waste service. Applications include 25-30 miles of polyethylene pipe and a large number of EPDM gaskets in the filter assembly of an effluent treatment system at the Savannah River Plant. 3 refs., 7 figs., 3 tabs.
- Research Organization:
- Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA). Savannah River Plant
- DOE Contract Number:
- AC09-76SR00001
- OSTI ID:
- 6329914
- Report Number(s):
- DP-MS-88-55; CONF-890437-5; ON: DE89005914
- Resource Relation:
- Conference: Corrosion '89, New Orleans, LA, USA, 17 Apr 1989; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
42 ENGINEERING
ELASTOMERS
MATERIALS TESTING
ORGANIC FLUORINE COMPOUNDS
PLASTICS
POLYETHYLENES
POLYVINYLS
PVC
RUBBERS
TBP
SOLVENT PROPERTIES
TEFLON
CRACKS
DISSOLUTION
GASKETS
NITRIC ACID
PIPES
POLYMERS
SAVANNAH RIVER PLANT
SEALING MATERIALS
SOLUTIONS
SWELLING
WASTE MANAGEMENT
BUTYL PHOSPHATES
CHLORINATED ALIPHATIC HYDROCARBONS
DISPERSIONS
ESTERS
FLUORINATED ALIPHATIC HYDROCARBONS
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MANAGEMENT
MATERIALS
MIXTURES
NATIONAL ORGANIZATIONS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHOSPHORIC ACID ESTERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
SEALS
SYNTHETIC MATERIALS
TESTING
US AEC
US DOE
US ERDA
US ORGANIZATIONS
052000* - Nuclear Fuels- Waste Management
360603 - Materials- Properties
420500 - Engineering- Materials Testing