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US3976428A
Expired / Lapsed
US
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Process for quantitative analysis
Assignee: Baker Petrolite LLC
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Filing: 1972-04-05
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Granted: 1976-08-24
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Expires: 1992-04-05
Abstract
Abstract A method for determining the concentration of the desired component of a system which comprises adding a predetermined amount of an easily analyzable auxiliary chemical to the system, which when subjected to analysis, for example spectroscopic analysis, gives a quantitative determination of its concentration in the system; and then determining the concentration of the desired component by correlating the ratio of the auxiliary chemical to the desired component.
Inventors
- 👤 John Link
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:29
CPC Classifications
G; G01; G01N; G01N31/00; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/173845
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
A process for making a rapid quantitative determination of the amount of corrosion inhibitor in a metal pickling system which comprises 1. adding a predetermined amount of easily analyzable lithium salt as an auxiliary chemical to said system, 2. analyzing said system for the concentration of lithium salt by means of spectroscopic analysis and 3. correlating the ratio of said lithium salt to said corrosion inhibitor so as to make a quantitative determination of its concentration in said system, thereby facilitating control and therefore the effectiveness of said corrosion inhibitor in said system.
Claim 2
Dependent Claim
93 words
A process for making a rapid quantitative determination of the amount of corrosion inhibitor in a metal pickling system which comprises 1. adding a predetermined amount of easily analyzable lithium salt as an auxiliary chemical to said system, 2. analyzing said system for the concentration of lithium salt by means of spectroscopic analysis and 3. correlating the ratio of said lithium salt to said corrosion inhibitor so as to make a quantitative determination of its concentration in said system, thereby facilitating control and therefore the effectiveness of said corrosion inhibitor in said system.
Claim 3
Dependent Claim
20 words
The process of claim 1 where the metal to be treated in the metal pickling system is a ferrous metal.
Claim 4
Dependent Claim
23 words
The process of claim 1 where the corrosion inhibitor is a polyquaternary compound obtained by the reaction of a polyethylene polyamine with epichlorhydrin.
Claim 5
Dependent Claim
12 words
The process of claim 1 where the lithium salt is lithium chloride.
Claim 6
Dependent Claim
13 words
The process of claim 1 where the spectroscopic analysis is atomic absorption spectroscopy.
References Cited (Backward Citations)
US3459506A
Cited
US3673410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |