GB1400758A - Process for electrolytically producing metallic silver powder - Google Patents

Process for electrolytically producing metallic silver powder

Info

Publication number
GB1400758A
GB1400758A GB5735772A GB5735772A GB1400758A GB 1400758 A GB1400758 A GB 1400758A GB 5735772 A GB5735772 A GB 5735772A GB 5735772 A GB5735772 A GB 5735772A GB 1400758 A GB1400758 A GB 1400758A
Authority
GB
United Kingdom
Prior art keywords
silver
powder
electrolyte
complexed
electrolysis
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
GB5735772A
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.)
SnamProgetti SpA
Original Assignee
SnamProgetti SpA
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
Priority to IT33010/71A priority Critical patent/IT944424B/en
Application filed by SnamProgetti SpA filed Critical SnamProgetti SpA
Publication of GB1400758A publication Critical patent/GB1400758A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D301/00Preparation of oxiranes
    • C07D301/02Synthesis of the oxirane ring
    • C07D301/03Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds
    • C07D301/04Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with air or molecular oxygen
    • C07D301/08Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with air or molecular oxygen in the gaseous phase
    • C07D301/10Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with air or molecular oxygen in the gaseous phase with catalysts containing silver or gold
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/48Silver or gold
    • B01J23/50Silver
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/34Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
    • B01J37/348Electrochemical processes, e.g. electrochemical deposition or anodisation
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/10Reduction of greenhouse gas [GHG] emissions
    • Y02P10/134Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen

Abstract

1400758 Electrolytically producing silver powder SNAMPROGETTI SpA 12 Dec 1972 [28 Dec 1971] 57357/72 Heading C7B Ag is electrolytically deposited on a cathode by electrolysis of a solution containing cations of Ag complexed with ammonia and, during the electrolysis, the Ag is removed from the cathode as a powder as it is formed. The removal may be by brushes (3, 3') rotated by a motor (4) as illustrated in the Fig. (not shown). Alternatively, the removal may be by ultrasonic vibrations, jets of liquid under pressure or by vigorous stirring of the electrolyte. Porous Ag powder can be produced having particle sizes of 300 to 1500 Angstroms. the complexed Ag cations may be derived from silver nitrate, sulphate, acetate, halide, oxalate or ammoniacal silver hydroxides. A colloid such as carboxymethylcellulose may be added to the electrolyte to prevent agglomeration of the powder. The electrolyte may be circulated through a heat exchanger (6) by a peristaltic pump (5). Specified electrolyzing conditions are a temperature of 10-50‹C, a current density of 2-50 ma/cm<SP>2</SP> , an aqueous electrolyte made up from AgNO 3 , Na 2 B 4 O 7 NaOH, NH 4 OH and carboxymethylcellulose. In the Examples the cathodes employed are ( 1 and 3) silver plates, (2) a silver net, (4) a silver or stainless steel plate tightly coupled to a graphite plate to form a bi-polar electrode. The Ag produced may be deposited on ceramic material and used as catalyst in the conversion of ethylene to ethylene oxide.
GB5735772A 1971-12-28 1972-12-12 Process for electrolytically producing metallic silver powder Expired GB1400758A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT33010/71A IT944424B (en) 1971-12-28 1971-12-28 PROCEDURE FOR THE PREPARATION OF SILVER-BASED CATALYSTS

Publications (1)

Publication Number Publication Date
GB1400758A true GB1400758A (en) 1975-07-23

Family

ID=11236250

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5735772A Expired GB1400758A (en) 1971-12-28 1972-12-12 Process for electrolytically producing metallic silver powder

Country Status (23)

Country Link
US (1) US3843491A (en)
JP (1) JPS5511895B2 (en)
AR (1) AR196221A1 (en)
AT (1) AT333702B (en)
AU (1) AU476492B2 (en)
BE (1) BE792890A (en)
BR (1) BR7208712D0 (en)
CA (1) CA1028276A (en)
CH (1) CH556915A (en)
CS (1) CS162787B2 (en)
DD (1) DD103269A5 (en)
DE (1) DE2263883C3 (en)
ES (1) ES410294A1 (en)
FR (1) FR2186541B1 (en)
GB (1) GB1400758A (en)
HU (1) HU165610B (en)
IT (1) IT944424B (en)
LU (1) LU66759A1 (en)
NL (1) NL7217691A (en)
RO (1) RO58869A (en)
TR (1) TR17434A (en)
YU (1) YU36103B (en)
ZA (1) ZA727973B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2715856A1 (en) * 1977-04-06 1978-10-19 Duval Corp Recovery of particulate crystalline product during electrolysis - using agitators to sweep product from cathodes onto conveyor
GB2248630A (en) * 1990-09-21 1992-04-15 Doryokuro Kakunenryo Electrolytic recovery of palladium from solution eg. radioactive waste
WO1999009234A2 (en) * 1997-08-15 1999-02-25 Sachem, Inc. Electrosynthesis of hydroxylammonium salts and hydroxylamine using a mediator, a catalytic film, methods of making the catalytic film, and electrosynthesis of compounds using the catalytic film
US6024855A (en) * 1997-08-15 2000-02-15 Sachem, Inc. Electrosynthesis of hydroxylammonium salts and hydroxylamine using a mediator
RU2558325C1 (en) * 2014-06-17 2015-07-27 Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Национальный исследовательский технологический университет "МИСиС" Electrolytic production of fine dispersed silver powders
DE102014204372A1 (en) 2014-03-11 2015-09-17 Bayer Materialscience Ag Process for the preparation of catalytically active powders of metallic silver or of mixtures of metallic silver with silver oxide for the production of gas diffusion electrodes

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302319A (en) * 1978-08-16 1981-11-24 Katsyguri Ijybi Continuous electrolytic treatment of circulating washings in the plating process and an apparatus therefor
NL8503090A (en) * 1985-11-11 1987-06-01 Harshaw Chemie Bv METHOD FOR PREPARING MOUNTED CATALYST SYSTEMS
US5413987A (en) * 1994-01-24 1995-05-09 Midwest Research Institute Preparation of superconductor precursor powders
US5462647A (en) * 1994-09-09 1995-10-31 Midwest Research Institute Preparation of lead-zirconium-titanium film and powder by electrodeposition
US5785837A (en) * 1996-01-02 1998-07-28 Midwest Research Institute Preparation of transparent conductors ferroelectric memory materials and ferrites
WO2001051685A2 (en) * 2000-01-10 2001-07-19 Michael John Sole Removal of metals from solution
CN101579889B (en) * 2009-06-05 2010-10-13 黎永健 Ceramic powder feeding device and feeding method thereof
EP2573210B1 (en) * 2011-09-23 2016-10-26 Covestro Deutschland AG Oxygen-consuming electrode and method for its production
EP2573213B1 (en) * 2011-09-23 2017-10-25 Covestro Deutschland AG Oxygen-consuming electrode and method for its production
CN103060854A (en) * 2013-01-11 2013-04-24 东南大学 Method for electrochemical synthesis of colloidal silver solution
CN104492428B (en) * 2014-11-28 2016-09-14 东莞市莞信企业管理咨询有限公司 A kind of Nano tube of zirconium dioxide of silver-doped or bismuth and its production and use

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB501278A (en) * 1937-08-21 1939-02-21 Bataafsche Petroleum Process for manufacturing catalysts and for bringing about catalytic reactions therewith

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2715856A1 (en) * 1977-04-06 1978-10-19 Duval Corp Recovery of particulate crystalline product during electrolysis - using agitators to sweep product from cathodes onto conveyor
GB2248630A (en) * 1990-09-21 1992-04-15 Doryokuro Kakunenryo Electrolytic recovery of palladium from solution eg. radioactive waste
WO1999009234A2 (en) * 1997-08-15 1999-02-25 Sachem, Inc. Electrosynthesis of hydroxylammonium salts and hydroxylamine using a mediator, a catalytic film, methods of making the catalytic film, and electrosynthesis of compounds using the catalytic film
WO1999009234A3 (en) * 1997-08-15 1999-06-03 Sachem Inc Electrosynthesis of hydroxylammonium salts and hydroxylamine using a mediator, a catalytic film, methods of making the catalytic film, and electrosynthesis of compounds using the catalytic film
US6024855A (en) * 1997-08-15 2000-02-15 Sachem, Inc. Electrosynthesis of hydroxylammonium salts and hydroxylamine using a mediator
DE102014204372A1 (en) 2014-03-11 2015-09-17 Bayer Materialscience Ag Process for the preparation of catalytically active powders of metallic silver or of mixtures of metallic silver with silver oxide for the production of gas diffusion electrodes
RU2558325C1 (en) * 2014-06-17 2015-07-27 Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Национальный исследовательский технологический университет "МИСиС" Electrolytic production of fine dispersed silver powders

Also Published As

Publication number Publication date
JPS4873387A (en) 1973-10-03
TR17434A (en) 1975-07-23
IT944424B (en) 1973-04-20
CH556915A (en) 1974-12-13
YU325672A (en) 1981-04-30
ES410294A1 (en) 1976-01-01
AU476492B2 (en) 1976-09-23
RO58869A (en) 1975-11-15
CA1028276A (en) 1978-03-21
FR2186541B1 (en) 1976-01-30
DE2263883C3 (en) 1975-05-28
NL7217691A (en) 1973-07-02
BR7208712D0 (en) 1973-09-20
AR196221A1 (en) 1973-12-10
DD103269A5 (en) 1974-01-12
JPS5511895B2 (en) 1980-03-28
FR2186541A1 (en) 1974-01-11
AT333702B (en) 1976-12-10
YU36103B (en) 1982-02-25
AU4866372A (en) 1974-05-09
LU66759A1 (en) 1973-02-27
ZA727973B (en) 1973-09-26
DE2263883A1 (en) 1973-07-19
CS162787B2 (en) 1975-07-15
BE792890A (en) 1973-03-30
US3843491A (en) 1974-10-22
HU165610B (en) 1974-09-28
DE2263883B2 (en) 1974-10-10
ATA1110772A (en) 1976-04-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee