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GB460898A - Improvements in or relating to leclanche cells and a depolarizer for these - Google Patents

Improvements in or relating to leclanche cells and a depolarizer for these

Info

Publication number
GB460898A
GB460898A GB22019/35A GB2201935A GB460898A GB 460898 A GB460898 A GB 460898A GB 22019/35 A GB22019/35 A GB 22019/35A GB 2201935 A GB2201935 A GB 2201935A GB 460898 A GB460898 A GB 460898A
Authority
GB
United Kingdom
Prior art keywords
acid
depolarizer
hydroxide
oxide
manganites
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
GB22019/35A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB460898A publication Critical patent/GB460898A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B29/00—Steam boilers of forced-flow type
    • F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
    • F22B29/12—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes operating with superimposed recirculation during starting and low-load periods, e.g. composite boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
    • F22G3/008—Protection of superheater elements, e.g. cooling superheater tubes during starting-up periods, water tube screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

A depolarizer for electric primary cells is obtained from a finely ground manganese ore by partial reduction of the surface of the particles and formation of manganites or poly-manganites thereon. Reduction may be effected by a manganous salt, hydrochloric acid, or sulphurous acid, with or without a ferrous salt, by heating at about 200 DEG C. in the presence of hydrogen and treatment with an acid, or, in the case of an ore comprising lower oxides such as Mn3O4, Mn2O3, and/or MnO, by a solution of manganous salt formed by dissolving these lower oxides in an acid. Formation of manganites may be effected by treatment with a solution or suspension of an oxide, hydroxide, or carbonate of an alkali or alkaline-earth metal, or with a solution of a manganate or permanganate; in the first case the surplus of manganese hydroxide and of the added oxide &c. is removed, as by oxidizing the manganese hydroxide with chlorine, hydrogen peroxide or a manganate or permangate, and dissolving the added oxide &c. in water or an acid, or by reacting the surplus hydroxide and oxide &c. with ammonium chloride. A material of the type aXO, bMnO, cMnO2, yH2O lying around a core of natural manganese ore, wherein X is Ca, Ba, Sr, Mg, K, or Na, may be obtained. When using the depolarizer in an electric primary cell, means may be provided in the electrolyte to protect the manganic ions generated by the depolarizer against decomposition, as by having a high concentration of anions therein, or adding salts, for example of hydrofluoric or phosphoric acid, which will form buffer salts. Specification 446,624 is referred to.
GB22019/35A 1952-01-05 1935-08-02 Improvements in or relating to leclanche cells and a depolarizer for these Expired GB460898A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL709888X 1952-01-05

Publications (1)

Publication Number Publication Date
GB460898A true GB460898A (en) 1937-02-02

Family

ID=19812174

Family Applications (2)

Application Number Title Priority Date Filing Date
GB22019/35A Expired GB460898A (en) 1952-01-05 1935-08-02 Improvements in or relating to leclanche cells and a depolarizer for these
GB24997/52A Expired GB709888A (en) 1952-01-05 1952-10-06 Means for disposing of superheated steam from a steam generator during the firing-up period

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB24997/52A Expired GB709888A (en) 1952-01-05 1952-10-06 Means for disposing of superheated steam from a steam generator during the firing-up period

Country Status (2)

Country Link
GB (2) GB460898A (en)
NL (1) NL78792C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908255A (en) * 1957-02-15 1959-10-13 Siemens Ag Forced-flow steam generators
US3291105A (en) * 1960-10-12 1966-12-13 Union Tank Car Co Desuperheating deaerating heater
NL280175A (en) * 1961-07-27
GB1052385A (en) * 1962-11-20
DE3137371C2 (en) * 1981-09-19 1984-06-20 Saarbergwerke AG, 6600 Saarbrücken System to reduce start-up and shutdown losses, to increase the usable power and to improve the controllability of a thermal power plant

Also Published As

Publication number Publication date
NL78792C (en)
GB709888A (en) 1954-06-02

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