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Title: Method of manipulating the chemical properties of water to improve the effectiveness of a desired chemical process

Patent ·
OSTI ID:872747
 [1];  [1];  [2];  [1]
  1. Grand Forks, ND
  2. Greenville, NC
+ Show Author Affiliations

The method of the present invention is adapted to manipulate the chemical properties of water in order to improve the effectiveness of a desired chemical process. The method involves heating the water in the vessel to subcritical temperatures between 100.degree. to 374.degree. C. while maintaining sufficient pressure to the water to maintain the water in the liquid state. Various physiochemical properties of the water can be manipulated including polarity, solute solubility, surface tension, viscosity, and the disassociation constant. The method of the present invention has various uses including extracting organics from solids and semisolids such as soil, selectively extracting desired organics from nonaqueous liquids, selectively separating organics using sorbent phases, enhancing reactions by controlling the disassociation constant of water, cleaning waste water, and removing organics from water using activated carbon or other suitable sorbents.

Research Organization:
Univ. of North Dakota, Grand Forks, ND (United States)
DOE Contract Number:
FC21-93MC30097
Assignee:
Energy & Environmental Research Center (Grand Forks, ND)
Patent Number(s):
US 6001256
OSTI ID:
872747
Country of Publication:
United States
Language:
English

References (6)

Reversed-Phase Chromatography book January 1980
Subcritical Water Extraction of Polychlorinated Biphenyls from Soil and Sediment journal December 1995
Coupled Subcritical Water Extraction with Solid-Phase Microextraction for Determining Semivolatile Organics in Environmental Solids journal January 1996
Subcritical Water Chromatography with Flame Ionization Detection journal February 1997
Extraction of Organic Pollutants from Environmental Solids with Sub- and Supercritical Water journal September 1994
Class-Selective Extraction of Polar, Moderately Polar, and Nonpolar Organics from Hydrocarbon Wastes Using Subcritical Water journal February 1997

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method
manipulating
chemical
properties
water
improve
effectiveness
desired
process
adapted
manipulate
involves
heating
vessel
subcritical
temperatures
100
degree
374
maintaining
sufficient
pressure
maintain
liquid
various
physiochemical
manipulated
including
polarity
solute
solubility
surface
tension
viscosity
disassociation
constant
extracting
organics
solids
semisolids
soil
selectively
nonaqueous
liquids
separating
sorbent
phases
enhancing
reactions
controlling
cleaning
waste
removing
activated
carbon
suitable
sorbents
selectively extracting
selectively separating
sorbent phase
waste water
activated carbon
critical temperature
method involves
surface tension
aqueous liquid
chemical properties
sufficient pressure
chemical process
removing organic
maintaining sufficient
desired chemical
aqueous liquids
selectively extract
separating organic
method involve
involves heating
suitable sorbent
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