Patent US7617969B2 successfully refreshed from Google Patents.
US4292292A
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Chlorine dioxide generation process
Assignee: Rio Linda Chemical Co Inc
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Filing: 1980-05-30
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Granted: 1981-09-29
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Expires: 2000-05-30
Abstract
Abstract The present invention is directed to a chlorine dioxide generation process. The Novel process of this invention utilizes concentrated hydrochloric acid solution reacted with concentrated sodium chlorite solution, without prior dilution of either reactant. Resulting in consistent high efficiency with respect to yield and chemical consumption.
Inventors
- 👤 Bruce W. Hicks
- 👤 Jerry D. Hicks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:20
CPC Classifications
C; C01; C01B; C01B11/00; C01B11/02; C01B11/022; C01B11/023; C01B11/024
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
A continuous process for producing chlorine dioxide by the reaction of a chlorite in a strong hydrochloric acid solution which comprises: Maintaining a constant level in a single reactor, in the absence of dilution water, by continuously feeding an undiluted solution of sodium chlorite that is from 0.7 molar to 3.49 molar into the reactor, and continuously feeding an undiluted hydrochloric acid solution that is from 6 molar to 12 molar into the reactor wherein from 0.8 moles to 2 moles of hydrochloric acid is supplied per mole of sodium chlorite, continuously removing the excess solution containing the generated chlorine dioxide from the reactor.
Claim 2
Dependent Claim
104 words
A continuous process for producing chlorine dioxide by the reaction of a chlorite in a strong hydrochloric acid solution which comprises: Maintaining a constant level in a single reactor, in the absence of dilution water, by continuously feeding an undiluted solution of sodium chlorite that is from 0.7 molar to 3.49 molar into the reactor, and continuously feeding an undiluted hydrochloric acid solution that is from 6 molar to 12 molar into the reactor wherein from 0.8 moles to 2 moles of hydrochloric acid is supplied per mole of sodium chlorite, continuously removing the excess solution containing the generated chlorine dioxide from the reactor.
Claim 3
Dependent Claim
15 words
Process of claim 1 wherein the sodium chlorite is from 1.5 molar to 2.5 molar.
Claim 4
Dependent Claim
15 words
Process of claim 1 wherein the hydrochloric acid is from 9.5 molar to 10.5 molar.
Claim 5
Dependent Claim
21 words
Process of claim 1 wherein from 0.93 moles to 1.75 moles of hydrochloric acid is supplied per mole of sodium chlorite.
Claim 6
Dependent Claim
75 words
A process for producing chlorine dioxide by the reaction of a chlorite in a strong hydrochloric acid solution which comprises: reacting in the absence of dilution water an undiluted solution of sodium chlorite that is from 0.7 molar to 3.49 molar with an undiluted hydrochloric acid solution that is from 6 molar to 12 molar in a reactor wherein from 0.8 moles to 2 moles of hydrochloric acid is supplied per mole of sodium chlorite.
Claim 7
Dependent Claim
75 words
A process for producing chlorine dioxide by the reaction of a chlorite in a strong hydrochloric acid solution which comprises: reacting in the absence of dilution water an undiluted solution of sodium chlorite that is from 0.7 molar to 3.49 molar with an undiluted hydrochloric acid solution that is from 6 molar to 12 molar in a reactor wherein from 0.8 moles to 2 moles of hydrochloric acid is supplied per mole of sodium chlorite.
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) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |