Publication date: 2004-05-06 

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.

　

WO2004037746   以尿素为还原剂在酸性介质中以氯酸盐生产二氧化氯方法

摘要：在矿物酸介质中以尿素为还原剂还原金属氯酸盐（NaClO3或KClO3）。这一方法有很高的转化率，可使90%以上碱金属氯盐转化为产品二氧化氯。而产品的纯度达95%。反应的母液可被加工或其有用无机盐。包括硫酸钾，硝酸钾硝酸钠等，或获得将有用化学产品复合肥而不是有毒废物。相应地提供高效成本低，安全的二氧化氯产品及无机盐或复合肥。