HIGH VACUUM AND FLASH DISTILLATION FOR RECOVERY AND CHARACTERIZATION OF HIGH BOILER

Technical Report · Fri Feb 01 04:00:00 EST 1963

OSTI ID:4001470

Perret, Jr, J D

Vacuum Flash Distillation (VFD) is an operable technique to recover and recycle a major portion of the High Boiler (HB) fraction now discharged to waste. It thus can provide a simple and economic coolant management process to remove the relatively nonvolatile HB fraction and particulate matter by distillation and still maintain total HB at the 30 to 35% level. Experimental results agree with calculated values, proving the validity of the vapor pressure data and the flash calculation methods used. Pyrolytic Capsule Fouling Test (PCFT) values of distillate samples were as low as those of glass-distilled terphenyls. Batch differential distillation and batch rectification under vacuum conditions have shown that OMHE Core II and Core HIA HB are 80+% volatile under conditions of 2 mm Hg Abs. and 800 deg F terminal temperature. High vacuum distillation (HVD) does not appear economically competitive with VFD as a coolant management system to maintain a 30 to 35% HB coolant, but may be useful to recover residual Distillable High Boiler (DHB) remaining in the bottoms from a VFD operation. A two-step distillation operation may be the most economical method of operation to maintain a coolant containing 50 to 60% DHB. No process difficulties are indicated if a bottoms temperature of 825 deg F is not exceeded. Core II HB and Core IIIA HB had different true boiling point curves. Maximum resolution of individual components and reproducibility were not established, hence no conclusions as to the utility of using True Boiling Point (TBP) curves as a method of characterization could be made. Molecular weight determinations on Core II HB distillate fractions gave unexpectedly low values, which disagree with present concepts of the composition of HB. 86% by weight of this HB has a molecular weight equal to or less than heptaphenyl. (auth)

• Research Organization: Atomics International. Div. of North American Aviation, Inc., Canoga Park, Calif.
• DOE Contract Number: AT(11-1)-GEN-8
• NSA Number: NSA-18-021552
• OSTI ID: 4001470
• Report Number(s): NAA-SR-Memo-7545
• Country of Publication: United States
• Language: English

Related Subjects

BOILING
CAPSULES
DISTILLATION
ECONOMICS
HIGH TEMPERATURE
MATERIALS TESTING
MATHEMATICS
MEASURED VALUES
MOLECULES
OMRE
ORGANIC COOLANT
ORGANIC MODERATOR
PHASE DIAGRAMS
PHENYL RADICALS
POLYPHENYLS
PRESSURE
PYROLYSIS
QUANTITY RATIO
REACTOR CORE
REACTOR TECHNOLOGY
REACTORS
RECOVERY
REPROCESSING
RESIDUES
TERPHENYLS
VACUUM
VAPORS
VOLATILITY
WEIGHT