US801820A - Process of extracting tin from tin-lead alloys. - Google Patents

Process of extracting tin from tin-lead alloys. Download PDF

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Publication number
US801820A
US801820A US258858A US1905258858A US801820A US 801820 A US801820 A US 801820A US 258858 A US258858 A US 258858A US 1905258858 A US1905258858 A US 1905258858A US 801820 A US801820 A US 801820A
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United States
Prior art keywords
tin
extracting
alloys
alloy
lead alloys
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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 - Lifetime
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US258858A
Inventor
Carl August Louis Wilhelm Witter
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STRAITS TRADING CO Ltd
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STRAITS TRADING CO Ltd
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Filing date
Publication date
Priority claimed from US23510504A external-priority patent/US801290A/en
Application filed by STRAITS TRADING CO Ltd filed Critical STRAITS TRADING CO Ltd
Priority to US258858A priority Critical patent/US801820A/en
Application granted granted Critical
Publication of US801820A publication Critical patent/US801820A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B25/00—Obtaining tin

Definitions

  • This invention relates to an improved process of extracting tin from tin-lead alloys, being a division of my application Serial No. 235,105, filed December 1, 1904, and has for its object to procure a process which renders the separation or recovering of tin from tinlead alloys more expeditious and cheap.
  • Tinlead alloys which contain a very large proportion of lead are hardly of commercial value if the tin contents do not amount to at least forty to fifty per cent, as heretofore there has not been discovered any profitable way of separating the tin from such alloys.
  • the tin contents of tin-lead alloys can be extracted or separated with profit.
  • the alloy is smelted in a reverberatory furnace (hearth or refining furnace) and when the temperature is such that the molten liquid shows a red glow is subjected to the action of air, a blast of air being preferably blown on the molten mass of metal.
  • the tin contained in the alloy is oxidized, but at the same time a certain portion of the lead is oxidized as well.
  • An oxid mixture containing a high percentage of tin is thus obtained, which can be drawn off from the surface of the metal-bath and then again reduced in a reverberatory or blast furnace and smelted to form an alloy containing a large proportion of tin.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Description

UN ITED STATES PATENT OFFICE.
CARL AUGUST LOUIS WVILHELM \VITTER, OF HAMBURG, GERMANY, ASSIGL'OR TO THE STRAITS TRADING (10., LTD., OF SINGAPORE,
STRAITS SETTLEMENTS, INDIA.
PROCESS OF EXTRACTING TIN FROM TIN-LEAD ALLOYS.
Specification of Letters Patent.
Patented Oct. 10, 1905.
Original application filed December 1, 1904, Serial No. 235,105. Divided and this application filed May 4,1905. Serial No. 258,858.
To all? whom it may concern.-
Be it known that I, CARL AUGUST LoUIs \VILHELM \VITTER, a subject of the German Emperor, and a resident of Hamburg, in the German Empire, have invented new and useful Improvements in Processes of Extracting Tin from Tin Alloys, of which the following is a specification.
This invention relates to an improved process of extracting tin from tin-lead alloys, being a division of my application Serial No. 235,105, filed December 1, 1904, and has for its object to procure a process which renders the separation or recovering of tin from tinlead alloys more expeditious and cheap.
Tinlead alloys which contain a very large proportion of lead are hardly of commercial value if the tin contents do not amount to at least forty to fifty per cent, as heretofore there has not been discovered any profitable way of separating the tin from such alloys. Under the present invention, however, the tin contents of tin-lead alloys can be extracted or separated with profit. According to the improved process the alloy is smelted in a reverberatory furnace (hearth or refining furnace) and when the temperature is such that the molten liquid shows a red glow is subjected to the action of air, a blast of air being preferably blown on the molten mass of metal.
The tin contained in the alloy is oxidized, but at the same time a certain portion of the lead is oxidized as well. An oxid mixture containing a high percentage of tin is thus obtained, which can be drawn off from the surface of the metal-bath and then again reduced in a reverberatory or blast furnace and smelted to form an alloy containing a large proportion of tin.
Having fully described my invention, what I claim, and desire to secure by Letters Patent, is
1. The process of extracting tin from tinlead alloys, which consists in oxidizing the alloy to obtain an oxidation product rich in tin and reducing said product to form an alloy rich in tin, substantially as described.
2. The process of extracting tin from tinlead alloys, which consists in oxidizing the alloy by smelting and then reducing the oxid mixture with carbon, in order to form an alloy rich in tin, substantially as set forth.
3. The process of extracting tin from tinlead alloys, which consists in melting the alloy in a suitable furnace and blowing a blast of air onto the surface of the metal-bath to form oxidation products on the surface of the bath, removing said products and reducing them to form an alloy rich in tin, substantially as described.
CARI} AUGUST LOUIS WILHELM WI'lTElt.
\Vitnesses:
MAx LEMCKE, J. CHRIST. HAFERMANN.
US258858A 1904-12-01 1905-05-04 Process of extracting tin from tin-lead alloys. Expired - Lifetime US801820A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US258858A US801820A (en) 1904-12-01 1905-05-04 Process of extracting tin from tin-lead alloys.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US23510504A US801290A (en) 1904-12-01 1904-12-01 Process of extracting tin from tin-slag.
US258858A US801820A (en) 1904-12-01 1905-05-04 Process of extracting tin from tin-lead alloys.

Publications (1)

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US801820A true US801820A (en) 1905-10-10

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