US3861874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Total recovery thermal analysis system
Assignee: Shell USA Inc
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Filing: 1973-03-07
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Granted: 1975-01-21
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Expires: 1993-03-07
Abstract
Abstract A total recovery thermal analysis method and apparatus for rapidly determining quantitative yield versus boiling point temperature information up to about 1,600*F for carbon-containing materials in a micro sample which includes both volatile and nonvolatile components. A pre-determined flow rate of carrier gas is passed over a sample which being heated at a pre-determined rate. Any volatile material evolved from the sample is then combusted to carbon dioxide which is measured in a detector. The sample temperatures and detector output are correlated and converted to boiling point curves by calibrating the apparatus with compounds of known boiling point.
Inventors
- 👤 Alfred E Krc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:17
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/12; G01N25/00; G01N25/02; G01N25/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
26 words
The method of claim 1 wherein the areas of the detector response recording are integrated to obtain the yields of carbon-containing materials at various boiling points.
Claim 2
Dependent Claim
24 words
The method of claim 1 wherein the carbon-containing material is converted to carbon dioxide by passing the total gas flow over heated copper oxide.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein the inert gas is helium.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein heating of the sample is at a rate from about 5*F/minute to about 100*F/minute.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein the carrier gas flow rate is from about 10 ml/minute to about 100 ml/minute.
Claim 6
Dependent Claim
23 words
The method of claim 1 wherein oxygen and water is removed from gas discharged from the combustion tube before passing into the detector.
Claim 7
Dependent Claim
16 words
The method of claim 7 wherein oxygen removal comprises passing said gas over heated metallic copper.
Claim 8
Independent Claim
254 words
An apparatus for conducting a thermal analysis of carbon-containing materials in a sample to obtain quantitative yield versus boiling point temperature information, said apparatus comprising: a hollow injection port tube mounted in a furnace and adapted to receive a sample holder capable of containing a micro sample of carbon-containing material, said injection port tube having an inlet opening and an outlet opening for establishing a gas flow therethrough, said sample holder having temperature measuring means operatively engaging said sample holder for measuring the temperature thereof and a linear temperature programmer capable of increasing the temperature of said injection port at a uniformed controlled rate to about 1,290*F; carrier gas inlet means in communication with a supply of carrier gas and with the injection port for flowing carrier gas over the sample holder; flow control operatively engaging the carrier gas inlet means for establishing a known inert gas flow over said sample in said tube; oxygen-injecting means communicating with said injection port tube for combusting carbon-containing material remaining in said sample; heating means operatively engaging said Carrier gas inlet means for reproducibly heating the carrier gas before passing said gas over said sample; a combustion tube having heating means and communicating with the outlet of said injection port tube; detector means communicating with said combustion tube for measuring the carbon dioxide content of the gas from said combustion tube; and recorder means operatively engaging the detector means and temperature measuring means for recording the detector response and the corresponding temperature of the sample being heated.
Claim 9
Dependent Claim
23 words
The apparatus of claim 9 including a linear temperature programmer operatively engaging combustion tube heating means for controlling the pre-determined sample heating rate.
Claim 10
Dependent Claim
25 words
The apparatus of claim 9 including means for cooling the sample inlet of said injection port tube and means for purging gases from said tube.
Claim 11
Dependent Claim
12 words
The apparatus of claim 9 wherein the combustion tube contains copper oxide.
Claim 12
Dependent Claim
14 words
The apparatus of claim 9 wherein said detector means is a thermal conductivity cell.
Claim 13
Dependent Claim
29 words
The apparatus of claim 13 including oxygen-removal and drying means operatively engaging the gas from said combustion tube prior to flow of the gas to the thermal conductivity cell.
References Cited (Backward Citations)
US3527567A
Cited
US3661527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |