Patent US4414472A successfully refreshed from Google Patents.
US4414472A
Expired / Lapsed
US
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Method for determining the solids weight fraction of a slurry
Assignee: Australian Atomic Energy Commission
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Filing: 1980-09-17
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Granted: 1983-11-08
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Expires: 2000-09-17
Abstract
Abstract A method for determining the solids weight fraction of a slurry especially a coal slurry is described based on a measure of the concentration (wt/wt) of hydrogen in the slurry by neutron transmission or scatter. Accuracy of the method can be improved by combining the neutron measurement with a γ-ray transmission or scatter measurement, and further improved by including a measurement of X-ray scatter or transmission. In the last mentioned case the mineral matter content of the coal in the slurry can also be determined.
Inventors
- 👤 John S. Watt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:59
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/02; G01N23/06; G01N23/12; G01N23/083
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
41 words
A method for determination of the solids weight fraction of a slurry comprising determining the relative concentration of hydrogen by weight in said slurry by neutron scatter or transmission measurement, and calculating the solids weight fraction from said concentration of hydrogen.
Claim 2
Independent Claim
41 words
A method for determination of the solids weight fraction of a slurry comprising determining the relative concentration of hydrogen by weight in said slurry by neutron scatter or transmission measurement, and calculating the solids weight fraction from said concentration of hydrogen.
Claim 3
Dependent Claim
28 words
A method as defined in claim 1 wherein said concentration is determined by a combination of neutron scatter or transmission measurement and a γ-ray scatter or transmission measurement.
Claim 4
Dependent Claim
14 words
A method as defined in claim 1 wherein said slurry is a coal slurry.
Claim 5
Dependent Claim
31 words
A method as defined in claim 3 wherein said concentration is determined by a combination of a neutron scatter or transmission measurement and at least one X-ray scatter or transmission measurement.
Claim 6
Dependent Claim
34 words
A method as defined in claim 3 wherein said concentration is determined by a combination of neutron scatter or transmission measurement, an γ-ray scatter or transmission measurement and an X-ray scatter or transmission measurement.
Claim 7
Dependent Claim
20 words
A method as defined in claim 4 or 5 wherein at least two X-ray scatter or transmission measurements are made.
Claim 8
Dependent Claim
16 words
A method as defined in claim 6 wherein said iron concentration is measured by X-ray fluorescence.
Claim 9
Dependent Claim
46 words
A method as defined in claim 4 or 5 further comprising determining the mineral matter content of the coal in said slurry wherein said mineral matter content is calculated from said relative weight concentration of hydrogen and said at least one X-ray scatter or transmission measurement.
Claim 10
Dependent Claim
35 words
A method as defined in claim 3, 4 or 5 wherein at least one of said solids weight fraction and said mineral matter content is determined by at least one probe immersed into said slurry.
Claim 11
Dependent Claim
39 words
A method as defined in claim 3, 4 or 5 wherein at least one of said solids weight fraction and said mineral matter content is determined by at least one probe mounted about a pipeline which carriers said slurry.
Claim 12
Dependent Claim
62 words
A method as defined in claim 4 or 5 wherein a first plurality of measurements are made for a second plurality of energy levels or groups of energy levels, and at least one measurement is made for each of said energy levels or groups of energy levels, and each of said levels or groups of energy levels is measured at least once.
Claim 13
Dependent Claim
21 words
A method as defined in claim 4 or 5, wherein a measurement is made of the iron present in the slurry.
Claim 14
Dependent Claim
51 words
A method as defined in claim 12 further comprising determining the mineral matter content of the coal in said slurry wherein said mineral matter content is calculated from said relative weight concentration of hydrogen and said at least one X-ray scatter or transmission measurement combined with said measurement of iron concentration.
Claim 15
Dependent Claim
46 words
A method as defined in claim 4 or 5, further comprising determining the mineral matter content of the coal in said slurry wherein said mineral matter content is calculated from said relative weight concentration of hydrogen and said at least one X-ray scatter or transmission measurement.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |