WO2004037746A3 - A method of producing chlorine dioxide using urea as a reducing agent - Google Patents

A method of producing chlorine dioxide using urea as a reducing agent Download PDF

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Publication number
WO2004037746A3
WO2004037746A3 PCT/US2003/032810 US0332810W WO2004037746A3 WO 2004037746 A3 WO2004037746 A3 WO 2004037746A3 US 0332810 W US0332810 W US 0332810W WO 2004037746 A3 WO2004037746 A3 WO 2004037746A3
Authority
WO
WIPO (PCT)
Prior art keywords
chlorine dioxide
clo2
reducing agent
urea
producing chlorine
Prior art date
Application number
PCT/US2003/032810
Other languages
French (fr)
Other versions
WO2004037746A2 (en
Inventor
Tianlang Chen
Yaoping Wu
Shenxiu Xiao
Original Assignee
Chen Steven Yichuan
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
Priority claimed from CNB021339341A external-priority patent/CN1247448C/en
Application filed by Chen Steven Yichuan filed Critical Chen Steven Yichuan
Priority to AU2003287104A priority Critical patent/AU2003287104A1/en
Publication of WO2004037746A2 publication Critical patent/WO2004037746A2/en
Publication of WO2004037746A3 publication Critical patent/WO2004037746A3/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C5/00—Fertilisers containing other nitrates
    • C05C5/02—Fertilisers containing other nitrates containing sodium or potassium nitrate

Abstract

A method of producing chlorine dioxide (ClO2) is described which employs Urea as a reducing agent to reduce alkaline chlorate (NaClO3 or KClO3) in a mineral acid medium. The method of the invention can, for example, by means of a very high transfer rate, be used to reduce over 90% of the reactant, alkaline chlorate, to the product, chlorine dioxide. Furthermore, ClO2 product purity is accomplished, for example, over 95%. The mother solution of the reaction can then be processed, for example, to produce other useful inorganic salts, including potassium sulfate, potassium nitrate, sodium nitrate, and the like, and/or compound fertilizer resulting in useful chemical products rather than toxic waste. Accordingly, the method of the invention provides for efficient, cost effective, and safe production of ClO2 as well as inorganic salts and/or compound fertilizer.
PCT/US2003/032810 2002-10-21 2003-10-16 A method of producing chlorine dioxide using urea as a reducing agent WO2004037746A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003287104A AU2003287104A1 (en) 2002-10-21 2003-10-16 A method of producing chlorine dioxide using urea as a reducing agent

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CNB021339341A CN1247448C (en) 2002-10-21 2002-10-21 Process for preparing ClO2 and coproducing organic salts and(or) compound fertilizer simultaneously
CN02133934.1 2002-10-21
US10/686,691 US6921521B2 (en) 2002-10-21 2003-10-15 Method of producing chlorine dioxide employs alkaline chlorate in a mineral acid medium and urea as a reducing agent
US10/686,691 2003-10-15

Publications (2)

Publication Number Publication Date
WO2004037746A2 WO2004037746A2 (en) 2004-05-06
WO2004037746A3 true WO2004037746A3 (en) 2004-11-25

Family

ID=32178143

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/032810 WO2004037746A2 (en) 2002-10-21 2003-10-16 A method of producing chlorine dioxide using urea as a reducing agent

Country Status (2)

Country Link
AU (1) AU2003287104A1 (en)
WO (1) WO2004037746A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102395526B (en) * 2009-02-19 2013-07-31 巴斯夫公司 Nonaqueous chlorine dioxide-generating compositions and methods related thereto
HUP1200031A3 (en) * 2009-03-26 2012-11-28 Popov Antiseptic agent comprising potassium chlorate

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5324497A (en) * 1992-02-26 1994-06-28 Westerlund G Oscar Integrated procedure for high yield production of chlorine dioxide and apparatus used therefor
US5545389A (en) * 1992-04-14 1996-08-13 Eka Nobel Ab Process for the production of chlorine dioxide
US6287533B1 (en) * 1999-09-20 2001-09-11 Mohammed N. I. Khan Production of chlorine dioxide by chemical reduction of ammonium chlorate in aqueous acidic solution

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5324497A (en) * 1992-02-26 1994-06-28 Westerlund G Oscar Integrated procedure for high yield production of chlorine dioxide and apparatus used therefor
US5545389A (en) * 1992-04-14 1996-08-13 Eka Nobel Ab Process for the production of chlorine dioxide
US6287533B1 (en) * 1999-09-20 2001-09-11 Mohammed N. I. Khan Production of chlorine dioxide by chemical reduction of ammonium chlorate in aqueous acidic solution

Also Published As

Publication number Publication date
AU2003287104A8 (en) 2004-05-13
WO2004037746A2 (en) 2004-05-06
AU2003287104A1 (en) 2004-05-13

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