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- Weldon_process abstract "The Weldon process is a process developed in 1866 by Walter Weldon for recovering manganese dioxide for re-use in chlorine manufacture. Commercial operations started at the Gamble works in St. Helens in 1869. The process is describe in considerable detailed in the book, The Alkali Industry, by J.R. Partington,D.Sc.The common method to manufacture chlorine at the time, was to react manganese dioxide (and related oxides) with hydrochloric acid to give chlorine: MnO2 + 4 HCl → MnCl2 + Cl2 + 2H2OWeldon's contribution was to develop a process to recycle the manganese. The waste manganese(II) chloride solution is treated with lime, steam and oxygen, producing calcium manganite(IV): 2 MnCl2 + 3 Ca(OH)2 + O2 → CaO·2MnO2 + 3 H2O + 2 CaCl2The resulting calcium manganite can be reacted with HCl as in related processes: CaO·2MnO2 + 10 HCl → CaCl2 + 2 MnCl2 + Cl2 + 5 H2OThe manganese(II) chloride can be recycled, while the calcium chloride is a waste byproduct.[citation needed]The Weldon process was first replaced by the Deacon process and later by the Chloralkali process.".
- Weldon_process wikiPageExternalLink Alkali_Manufacture.
- Weldon_process wikiPageExternalLink alkaliindustry00partuoft.
- Weldon_process wikiPageExternalLink chlorine-industry.htm.
- Weldon_process wikiPageID "997397".
- Weldon_process wikiPageRevisionID "542490477".
- Weldon_process hasPhotoCollection Weldon_process.
- Weldon_process subject Category:Chemical_processes.
- Weldon_process subject Category:Chlorine.
- Weldon_process type ChemicalProcess113446390.
- Weldon_process type ChemicalProcesses.
- Weldon_process type NaturalProcess113518963.
- Weldon_process type PhysicalEntity100001930.
- Weldon_process type Process100029677.
- Weldon_process comment "The Weldon process is a process developed in 1866 by Walter Weldon for recovering manganese dioxide for re-use in chlorine manufacture. Commercial operations started at the Gamble works in St. Helens in 1869. The process is describe in considerable detailed in the book, The Alkali Industry, by J.R.".
- Weldon_process label "Processo Weldon".
- Weldon_process label "Weldon process".
- Weldon_process sameAs Processo_Weldon.
- Weldon_process sameAs m.03xvxl.
- Weldon_process sameAs Q1631931.
- Weldon_process sameAs Q1631931.
- Weldon_process sameAs Weldon_process.
- Weldon_process wasDerivedFrom Weldon_process?oldid=542490477.
- Weldon_process isPrimaryTopicOf Weldon_process.