US1607869A - Electrolytic refining of metals - Google Patents

Electrolytic refining of metals Download PDF

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Publication number
US1607869A
US1607869A US34222A US3422225A US1607869A US 1607869 A US1607869 A US 1607869A US 34222 A US34222 A US 34222A US 3422225 A US3422225 A US 3422225A US 1607869 A US1607869 A US 1607869A
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US
United States
Prior art keywords
zinc
reagent
addition
metals
electrolyte
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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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US34222A
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Frank F Colcord
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US SMELTING REFINING AND MINING CO
United States Smelting Refining and Mining Co
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US SMELTING REFINING AND MINING CO
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Priority to US34222A priority Critical patent/US1607869A/en
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
    • C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury

Definitions

  • the invention relates to the electrodeposition of metals and more particularly to the electrodeposition of zinc.
  • This reagent is a sulphite liquor concentrate comprising the solid or viscous materials obtained from the waste sulphite liquors produced by treating certain woods with sulphite solutions.
  • colloidal substance which ,may be designated as sulphite lignose.
  • the principal constituents of this substance are or may be lignin sulphuric acid, lignin sulphonic acid, aldehyde sulphonic acids, furfural, and plant sugars.
  • sulphite lignose may be used as an addition reagent in certain electrolytes with remarkably advantageous results. It may be used to replace many of the addition reagents commonly used, weight for weight, and owing to its ex tremely low price, a substantial economy may be effected. It may be used alone or in partial replacement of some of the commonly used addition reagents effecting not only an economy thereby, but permitting the substitution to take place in an old electrolyte and thus avoid the cost of new electrolyte when changing over to this addition reagent.
  • this addition reagent has given particularly excellent results in the electrodeposition of zinc with a sulphuric acid electrolyte. lVhile the composition of the electrolyte can vary considerably without materially affecting the character of the deposit, excellent results have been obtained with an electrolyte which at the start contained 100 grams of zinc as zinc sulphate per liter, and which at the end contained 30 grams of zinc and 100 grams of free sulphuric acid per liter.
  • the common addition reagent in the electrodeposition of zinc has been glue, but complete substitution of this new addition reagent can be efiected.
  • this addition reagent when used alone is added daily to the electrolyte in the form of a water solution at the rate of one to two pounds of the dry reagent per ton of zinc produced, while if used in conjunction with glue the total quantity of the two reagents added daily is one to two pounds per ton of zinc produced with the glue and the new reagent varying in such proportion as desired.
  • the new reagent alone or in conjunction with other addition reagents produces bright and dense deposits of zinc with sulphuric acid electrolytes.
  • That improvement in the electrodeposition of zinc with sulphuric acid electrolytes which consists in the use in the acid electrolyte of sulphite lignose as an addition reagent.
  • That improvement in the electrodeposition of zinc with sulphuric acid electrolytes which consists in the use as an addition reagent in the acid electrolyte of sul hite lignose. in conjunction with other ad ition reagents.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)

Description

Patented Nov. 23, 1926.
UNITED STATES FRANK F. COLCORD, OF NEW YORK, N. Y.,
PATENT OFFICE.
ASSIGNOR TO UNITED STATES SMELTING,
REFINING & MINING COMPANY, OF PORTLAND, MAINE, A CORPORATION OF MAINE.
ELECTROLYTIC REFINING OF METALS.
No Drawing.
The invention relates to the electrodeposition of metals and more particularly to the electrodeposition of zinc.
It is the practice in the electrodeposition of zinc to use so-called addition reagents in theelectrolyte and the present invention is based on the discovery of a new reagent of this character which may be used with marked advantage oyer prior reagents in the electrodeposition of zinc. This reagent is a sulphite liquor concentrate comprising the solid or viscous materials obtained from the waste sulphite liquors produced by treating certain woods with sulphite solutions. The
evaporation of these liquors leaves a colloidal substance which ,may be designated as sulphite lignose. The principal constituents of this substance are or may be lignin sulphuric acid, lignin sulphonic acid, aldehyde sulphonic acids, furfural, and plant sugars.
This substance is cheaply made from the waste sulphite liquors produced from the manufacture of paper pulp and is known under the trade names lignol and goulac.
I have discovered that sulphite lignose may be used as an addition reagent in certain electrolytes with remarkably advantageous results. It may be used to replace many of the addition reagents commonly used, weight for weight, and owing to its ex tremely low price, a substantial economy may be effected. It may be used alone or in partial replacement of some of the commonly used addition reagents effecting not only an economy thereby, but permitting the substitution to take place in an old electrolyte and thus avoid the cost of new electrolyte when changing over to this addition reagent. In many cases it produces a cathode depos tsuperior to deposits obtained from other addition reagents, increasing thereby the efli- .eiency of the operation and resulting in an important economy in the power consump tion. No accumulation in the electrolyte of substances which might finally cause the deposit to form non-adherent and crystalline Application filed .Tune 1, 1925. Serial No. 34,222.
deposits has been noticed With this addition reagent, as in the case with some of the prior addition reagents commonly used.
The use of this addition reagent has given particularly excellent results in the electrodeposition of zinc with a sulphuric acid electrolyte. lVhile the composition of the electrolyte can vary considerably without materially affecting the character of the deposit, excellent results have been obtained with an electrolyte which at the start contained 100 grams of zinc as zinc sulphate per liter, and which at the end contained 30 grams of zinc and 100 grams of free sulphuric acid per liter. The common addition reagent in the electrodeposition of zinc has been glue, but complete substitution of this new addition reagent can be efiected. In actual practice this addition reagent when used alone is added daily to the electrolyte in the form of a water solution at the rate of one to two pounds of the dry reagent per ton of zinc produced, while if used in conjunction with glue the total quantity of the two reagents added daily is one to two pounds per ton of zinc produced with the glue and the new reagent varying in such proportion as desired. The new reagent alone or in conjunction with other addition reagents produces bright and dense deposits of zinc with sulphuric acid electrolytes.
What is claimed is:
1. That improvement in the electrodeposition of zinc with sulphuric acid electrolytes which consists in the use in the acid electrolyte of sulphite lignose as an addition reagent.
2. That improvement in the electrodeposition of zinc with sulphuric acid electrolytes which consists in the use as an addition reagent in the acid electrolyte of sul hite lignose. in conjunction with other ad ition reagents.
In testimony whereof I have name to this specification.
FRANK F. COLCORD.
signed my
US34222A 1925-06-01 1925-06-01 Electrolytic refining of metals Expired - Lifetime US1607869A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2529700A (en) * 1946-08-01 1950-11-14 Hudson Bay Mining & Smelting Method of electrolytically producing zinc of high purity
US2632728A (en) * 1950-12-06 1953-03-24 Poor & Co Compositions and method for electroplating zinc
US3637475A (en) * 1968-09-23 1972-01-25 Mini Ind Constructillor Zinc-plating bath for bright or glossy coating
EP0137540A2 (en) * 1983-09-28 1985-04-17 Metallgesellschaft Ag Process for the electrolytic zinc plating of steel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2529700A (en) * 1946-08-01 1950-11-14 Hudson Bay Mining & Smelting Method of electrolytically producing zinc of high purity
US2632728A (en) * 1950-12-06 1953-03-24 Poor & Co Compositions and method for electroplating zinc
US3637475A (en) * 1968-09-23 1972-01-25 Mini Ind Constructillor Zinc-plating bath for bright or glossy coating
EP0137540A2 (en) * 1983-09-28 1985-04-17 Metallgesellschaft Ag Process for the electrolytic zinc plating of steel
US4547269A (en) * 1983-09-28 1985-10-15 Metallgesellschaft Aktiengesellschaft Method of electrodepositing zinc on steel prior to phosphating
EP0137540A3 (en) * 1983-09-28 1987-05-27 Metallgesellschaft Ag Process for the electrolytic zinc plating of steel

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