DE378289C - Process for the production of chlorine dioxide - Google Patents

Process for the production of chlorine dioxide

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Publication number
DE378289C
DE378289C DEK80526D DEK0080526D DE378289C DE 378289 C DE378289 C DE 378289C DE K80526 D DEK80526 D DE K80526D DE K0080526 D DEK0080526 D DE K0080526D DE 378289 C DE378289 C DE 378289C
Authority
DE
Germany
Prior art keywords
chlorine dioxide
production
acid
reducing agent
sulfuric acid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEK80526D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KOELN ROTTWEIL AKT GES
Original Assignee
KOELN ROTTWEIL AKT GES
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KOELN ROTTWEIL AKT GES filed Critical KOELN ROTTWEIL AKT GES
Priority to DEK80526D priority Critical patent/DE378289C/en
Application granted granted Critical
Publication of DE378289C publication Critical patent/DE378289C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B11/00—Oxides or oxyacids of halogens; Salts thereof
    • C01B11/02—Oxides of chlorine
    • C01B11/022—Chlorine dioxide (ClO2)
    • C01B11/023—Preparation from chlorites or chlorates

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Description

Verfahren zur Herstellung von Chlordioxyd. In der Literatur sind zwei Verfahren zur Herstellung von Chlordioxyd beschrieben.Process for the production of chlorine dioxide. In the literature there are two Process for the production of chlorine dioxide described.

Das eine beruht -auf der Zersetzung von Kaliumchlorat durch konzentrierte Schwefelsäure, das aber wegen der Explosionsgefahr nicht zur Gewinnung größerer Mengen Chlordioxyd benutzt werden kann.One is based on the decomposition of potassium chlorate by concentrated Sulfuric acid, but not for obtaining larger ones because of the risk of explosion Amounts of chlorine dioxide can be used.

Das zweite Verfahren, bei welchem man nach Bray (Zeitschr. für physikal. Chem. Bd. 54, S. 57q., zgo6) Oxalsäure auf Kaliumchlorat einwirken läßt, arbeitet vollkommen sicher, ist aber wegen des großen Verbrauchs an Oxalsäure (in der Literatur sind etwa 41/2 Mol. angegeben) nach der Brayschen Vorschrift recht teuer.The second method, in which, according to Bray (Zeitschr. Für physical. Chem. Vol. 54, p. 57q., Zgo6) lets oxalic acid act on potassium chlorate, works completely safe, but is because of the large consumption of oxalic acid (in the literature are about 41/2 mol. given) quite expensive according to the Bray rule.

Die Betriebssicherheit des Brayschen Verfahrens beruht nun offenbar darauf, daß die Oxalsäure nicht nur als Säure die Chlorsäure freimacht, sondern gleichzeitig als Reduktionsmittel den überschüssigen Sauerstoff der Chlorsäure aufnimmt.The operational reliability of the Bray process is now apparently based that the oxalic acid not only frees the chloric acid as an acid, but also simultaneously absorbs the excess oxygen in the chloric acid as a reducing agent.

Die Erfindung betrifft ein billiges und doch sicheres Verfahren zur Herstellung von Chlordioxyd; sie besteht in der Vereinigung der Vorteile beider Verfahren; man erhitzt vorsichtig ein Chlorat mit etwas mehr als der theoretischen Menge eines passenden Reduktionsmittels und der nötigen Menge Schwefelsäure im Wasserbade. Als Reduktionsmittel kommen beispielsweise Ameisensäure, Oxalsäure, Kohlehydrate (Zucker, Holz, Stärke, Zellstoff) in Betracht. Die Menge der anzuwendenden Schwefelsäure ist so zu bemessen, daß nicht nur die Chlorsäure, sondern auch das manchmal in Salzform angewendete Reduktionsmittel freigemacht werden. Je nach der Art des Reduktionsmittels kann die Schwefelsäure in verschiedener Konzentration angewendet werden; in den meisten Fällen ist jedoch eine zu geringe Konzentration nicht günstig. Beispiele: Die Mengen der anzuwendenden Stoffe sind beispielsweise aus den folgenden Gleichungen zu entnehmen 2 NaC103 -@- CIH204 -f- H2S04 = Nag S04 + 2 C102 -E- 2 H,0 + 2 CO2 2 KC103+ K1C204+4IllS04 = 4 K HS 04 -1- 2 C102 -E- 2 11,0 -;- 2 C 0.,.The invention relates to an inexpensive yet safe process for the production of chlorine dioxide; it consists in combining the advantages of both methods; a chlorate is carefully heated in a water bath with a little more than the theoretical amount of a suitable reducing agent and the necessary amount of sulfuric acid. As reducing agents, for example, formic acid, oxalic acid, carbohydrates (sugar, wood, starch, cellulose) come into consideration. The amount of sulfuric acid to be used is to be measured in such a way that not only the chloric acid but also the reducing agent, which is sometimes used in salt form, is released. Depending on the type of reducing agent, the sulfuric acid can be used in various concentrations; however, in most cases too low a concentration is not favorable. Examples: The quantities of the substances to be used can be taken from the following equations, for example: 2 NaC103 - @ - CIH204 -f- H2S04 = Nag S04 + 2 C102 -E- 2 H, 0 + 2 CO2 2 KC103 + K1C204 + 4IllS04 = 4 K HS 04 -1- 2 C102 -E- 2 11.0 -; - 2 C 0.,.

Claims (2)

PATENTANSPRÜCHE: z. Verfahren zur Herstellung von Chlordioxyd aus Chloraten unter Verwendung von einem Reduktionsmittel und Schwefelsäure, dadurch gekennzeichnet, daß dem Chlorat nur die theoretisch erforderliche Menge oder ein geringer Überschuß des Reduktionsmittels (Oxalsäure, Ameisensäure usw.) zugesetzt wird. PATENT CLAIMS: e.g. Process for the production of chlorine dioxide from chlorates using a reducing agent and sulfuric acid, characterized in that only the theoretically required amount or a small excess of the reducing agent (oxalic acid, formic acid, etc.) is added to the chlorate. 2. Verfahren zur Herstellung von Chlordioxyd aus Chloraten unter Verwendung von einem Reduktionsmittel und Schwefelsäure, dadurch gekennzeichnet, daß man zur Freimachung der Chlorsäure aus dem Chlorat so viel Schwefelsäure zusetzt, daß diese nur in das Disulfat übergeführt wird.2. Process for the production of chlorine dioxide from chlorates using of a reducing agent and sulfuric acid, characterized in that one for Liberation of the chloric acid from the chlorate adds so much sulfuric acid that it is only converted into the disulfate.
DEK80526D 1922-01-19 1922-01-19 Process for the production of chlorine dioxide Expired DE378289C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK80526D DE378289C (en) 1922-01-19 1922-01-19 Process for the production of chlorine dioxide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK80526D DE378289C (en) 1922-01-19 1922-01-19 Process for the production of chlorine dioxide

Publications (1)

Publication Number Publication Date
DE378289C true DE378289C (en) 1923-07-09

Family

ID=7233897

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK80526D Expired DE378289C (en) 1922-01-19 1922-01-19 Process for the production of chlorine dioxide

Country Status (1)

Country Link
DE (1) DE378289C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE884040C (en) * 1939-02-01 1953-07-23 Cyril Harry Evans Process and device for the production of chlorine dioxide
DE971519C (en) * 1941-11-15 1959-02-12 Hoechst Ag Process for the production of chlorine dioxide
US4081520A (en) * 1976-03-19 1978-03-28 Erco Industries Limited High efficiency production of chlorine dioxide by solvay process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE884040C (en) * 1939-02-01 1953-07-23 Cyril Harry Evans Process and device for the production of chlorine dioxide
DE971519C (en) * 1941-11-15 1959-02-12 Hoechst Ag Process for the production of chlorine dioxide
US4081520A (en) * 1976-03-19 1978-03-28 Erco Industries Limited High efficiency production of chlorine dioxide by solvay process

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