Aqueous Displacement of Water-Immiscible Cleaning Solvents

2017 ◽  
pp. 175-189
Author(s):  
Sami B. Awad
Keyword(s):  
Cleaning Solvents

scholarly journals Study on cleaning solvents using activated alumina in PUREX process

2011 ◽  
Vol 1 (1) ◽  
pp. 71-74
Author(s):  
Y. Arai ◽  
H. Ogino ◽  
M. Takeuchi ◽  
T. Kase ◽  
Y. Nakajima
Keyword(s):  
Phase Separation ◽  
Tributyl Phosphate ◽  
Spent Nuclear Fuel ◽  
Degradation Products ◽  
Purex Process ◽  
Separation Performance ◽  
Activated Alumina ◽  
Alkali Solutions ◽  
Cleaning Solvents ◽  
Separation Test

Abstract The PUREX process is used to extract uranium and plutonium from dissolved solutions (spent nuclear fuel liquor). The extractant is 30% tributyl phosphate in n-dodecane, which is known to be degradable by radiation and nitric acid. Tributyl phosphate degradation products can generally be washed in alkali solutions like sodium carbonate solution; however, it is more difficult to remove n-dodecane degradation products using this method. A method of cleaning solvents using activated alumina is discussed in this study. A degradation sample of 30% TBP/n-dodecane was prepared by irradiating (1.6 MGy) with a 60Co gamma-source. The degradation products were then qualitatively analyzed using a gas chromatography-mass spectrometer (GC-MS). After being irradiated the solvents were cleaned with activated alumina, and a phase separation test with performed in evaluating the cleaned solvent. This resulted in the discovery of a procedure for the removal of n-dodecane degradation products of dodecanol and dodecanone, with about 70% of the degradation products, and the phase separation performance could be clearly improved through use of activated alumina.

Treatment Prevents Wood Sap Stains, Fabrics Not Weakened by Cleaning Solvents, and more

1932 ◽  
Vol 147 (1) ◽  
pp. 40-59
Author(s):  
F. D. Mchugh ◽  
Alexander Klemin ◽  
A. E. Buchanan
Keyword(s):  
Cleaning Solvents

Particle Removal from Semiconductor Wafers Using Cleaning Solvents

1989 ◽  
pp. 259-271 ◽  
Author(s):  
V. B. Menon ◽  
L. D. Michaels ◽  
R. P. Donovan ◽  
V. L. Debler ◽  
M. B. Ranade
Keyword(s):  
Particle Removal ◽  
Cleaning Solvents

Solvent Contamination Determined by UV Reflection

1985 ◽  
Vol 28 (5) ◽  
pp. 23-26
Author(s):  
Edward Murphy
Keyword(s):  
Room Temperature ◽  
Ultraviolet Absorption ◽  
Simple Test ◽  
Reflection Spectroscopy ◽  
Cleaning Solvents ◽  
Uv Reflection

Commercial organic cleaning solvents, unless specially prepared, may increase contamination of an item rather than clean it. A simple test to determine the presence or absence of a contaminant in a solvent can be performed by using ultraviolet-reflection spectroscopy. The procedure consists of immersing a quartz-paper coupon in a small quantity of the solvent to be tested, then evaporating the solution to dryness in a vent hood at room temperature. Prior to immersion, clean quartz paper typically reflects 70 to 90% of the ultraviolet in a range from 200 to 360 nm. If the filaments of the quartz-paper coupon have had any contaminant from the solvent deposited on their surfaces, the multi reflections produce an extensive ultraviolet absorption.

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