GB672354A - Improvements in carrying out powder-metallurgical processes - Google Patents

Improvements in carrying out powder-metallurgical processes

Info

Publication number
GB672354A
GB672354A GB3587/50A GB358750A GB672354A GB 672354 A GB672354 A GB 672354A GB 3587/50 A GB3587/50 A GB 3587/50A GB 358750 A GB358750 A GB 358750A GB 672354 A GB672354 A GB 672354A
Authority
GB
United Kingdom
Prior art keywords
metals
powders
precipitated
ammonia
copper
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
GB3587/50A
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.)
BASF SE
Original Assignee
BASF SE
Badische Anilin and Sodafabrik AG
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 BASF SE, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Publication of GB672354A publication Critical patent/GB672354A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors

Abstract

In powder metallurgical processes the metal powders are obtained by precipitating hydroxides or basic salts from solutions of the metals by ammonia or ammonium carbonate and reducing them at elevated temperatures, preferably with hydrogen and, if desired, under pressure. The hydroxides may be precipitated with an excess of ammonia, which, after the removal of any solid impurities, is removed, e.g. by boiling. The metals may be dissolved in ammoniacal ammonium carbonate with the use of an oxidizing agent. Any metal remaining in solution after precipitation of the hydroxide may be precipitated with oxalic acid and the oxalate reduced in hydrogen. Alloys may be produced from solutions containing two or more metals. Examples are given of the production of copper, copper-iron alloy, and cobalt powders. The powders obtained are stated to be easily sintered at low temperatures and to produce solid bodies without cracks. Specification 203,383, [Class 82(i)], is referred to.
GB3587/50A 1949-02-22 1950-02-13 Improvements in carrying out powder-metallurgical processes Expired GB672354A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE672354X 1949-02-22

Publications (1)

Publication Number Publication Date
GB672354A true GB672354A (en) 1952-05-21

Family

ID=6590716

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3587/50A Expired GB672354A (en) 1949-02-22 1950-02-13 Improvements in carrying out powder-metallurgical processes

Country Status (1)

Country Link
GB (1) GB672354A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754194A (en) * 1953-12-29 1956-07-10 Republic Steel Corp Process for making copper-iron powder
US2754193A (en) * 1953-12-29 1956-07-10 Republic Steel Corp Process for making copper-iron powder
US11607734B2 (en) 2018-05-30 2023-03-21 Hela Novel Metals Llc Methods for the production of fine metal powders from metal compounds

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754194A (en) * 1953-12-29 1956-07-10 Republic Steel Corp Process for making copper-iron powder
US2754193A (en) * 1953-12-29 1956-07-10 Republic Steel Corp Process for making copper-iron powder
US11607734B2 (en) 2018-05-30 2023-03-21 Hela Novel Metals Llc Methods for the production of fine metal powders from metal compounds

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