GB1152506A - A process for the manufacture of Enriched Colloidal Silver - Google Patents

A process for the manufacture of Enriched Colloidal Silver

Info

Publication number
GB1152506A
GB1152506A GB29875/67A GB2987567A GB1152506A GB 1152506 A GB1152506 A GB 1152506A GB 29875/67 A GB29875/67 A GB 29875/67A GB 2987567 A GB2987567 A GB 2987567A GB 1152506 A GB1152506 A GB 1152506A
Authority
GB
United Kingdom
Prior art keywords
silver
enriched
citrate
colloidal silver
protective colloid
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
GB29875/67A
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 Schweiz AG
Original Assignee
Ciba 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 Ciba AG filed Critical Ciba AG
Publication of GB1152506A publication Critical patent/GB1152506A/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
    • B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/0004—Preparation of sols
    • B01J13/0008—Sols of inorganic materials in water
    • B01J13/0013—Sols of inorganic materials in water from a precipitate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/0004—Preparation of sols
    • B01J13/0043—Preparation of sols containing elemental metal
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
    • C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
    • C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
    • C07D333/26—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D333/38—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/825—Photosensitive materials characterised by the base or auxiliary layers characterised by antireflection means or visible-light filtering means, e.g. antihalation
    • G03C1/8255—Silver or silver compounds therefor

Abstract

1,152,506. Enriched colloidal silver. CIBA Ltd. 28 June, 1967 [28 June, 1966], No. 29875/67. Heading C1A. [Also in Divisions C2 and G2] Enriched colloidal silver is produced by treating a dilute aqueous dispersion of silver, obtained by reducing silver salts, with an agent capable of flocculating colloidal silver in a medium of pH of 3 to 8, separating the flocculate at a pH of 3 to 8, redispersing it in enriched form in a protective colloid in the presence of citrate ions. The protective colloid is preferably gelatine. Suitable flocculating agents comprise the colourless compounds containing at least one acid group imparting solubility in water, at least one six-membered heterocyclic group consisting of 3 to 4 carbon atoms and 3 or 2 nitrogen atoms, and at least one aromatic residue, for example, as described in Specification 1,041,085. Other flocculating agents include those compounds obtained by condensing a diaminodiphenyl sulphonic acid particularly of Formula I where X stands for a methyl group or for a hydrogen atom, with a thiophene, 2,5-dicarboxylic acid dihalide in the molecular ratio of 1: 2 to 2: 1. The flocculate is advantageously redispersed at a pH of 5 to 7, and the citrate ions are preferably added in the form of a watersoluble citrate, e.g. sodium citrate. The dispersions advantageously contain 1 to 10% of metallic silver, 4 to 10% of the protective colloid and 3 to 8% of citrate ions (calculated as citric acid, referred to dry gelatine).
GB29875/67A 1966-06-28 1967-06-28 A process for the manufacture of Enriched Colloidal Silver Expired GB1152506A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH934866A CH467475A (en) 1966-06-28 1966-06-28 Process for making enriched colloidal silver

Publications (1)

Publication Number Publication Date
GB1152506A true GB1152506A (en) 1969-05-21

Family

ID=4351027

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29875/67A Expired GB1152506A (en) 1966-06-28 1967-06-28 A process for the manufacture of Enriched Colloidal Silver

Country Status (8)

Country Link
US (1) US3615789A (en)
AT (1) AT274751B (en)
BE (1) BE700589A (en)
CH (1) CH467475A (en)
DE (1) DE1547661A1 (en)
FR (1) FR1605075A (en)
GB (1) GB1152506A (en)
NL (1) NL6708943A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3130345A1 (en) * 1981-07-31 1983-02-17 Agfa-Gevaert Ag, 5090 Leverkusen METHOD FOR CONCENTRATING YELLOW SILVER SOLE
GB2120227A (en) * 1982-05-14 1983-11-30 Johnson Matthey Plc Compositions comprising inorganic particles

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2559191C2 (en) * 1975-12-30 1982-11-25 Agfa-Gevaert Ag, 5090 Leverkusen Process for the production of silver dispersions for filter and antihalation layers
US6214299B1 (en) 1999-06-01 2001-04-10 Robert J. Holladay Apparatus and method for producing antimicrobial silver solution
CA2526150C (en) * 2003-06-03 2014-05-06 American Biotech Labs Treatment of humans with colloidal silver composition
DE102006017696A1 (en) * 2006-04-15 2007-10-18 Bayer Technology Services Gmbh Process for the production of metal particles, metal particles produced therefrom and their use
CN103357886B (en) * 2013-06-28 2016-09-07 上海纳米技术及应用国家工程研究中心有限公司 A kind of preparation method of the noble metal nano cluster for fluorescent optical sensor
CN103737017B (en) * 2014-01-14 2016-06-22 山西大学 A kind of preparation method of Fluorescence gold nanoparticle
KR20180077252A (en) 2015-10-30 2018-07-06 클라리언트 인터내셔널 리미티드 Metal dispersions having increased stability

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334995A (en) * 1961-07-31 1967-08-08 Minnesota Mining & Mfg Process of precipitating silver
NL297840A (en) * 1962-09-13

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3130345A1 (en) * 1981-07-31 1983-02-17 Agfa-Gevaert Ag, 5090 Leverkusen METHOD FOR CONCENTRATING YELLOW SILVER SOLE
GB2120227A (en) * 1982-05-14 1983-11-30 Johnson Matthey Plc Compositions comprising inorganic particles
US4701218A (en) * 1982-05-14 1987-10-20 Johnson Matthey Public Limited Company Compositions comprising inorganic particles

Also Published As

Publication number Publication date
AT274751B (en) 1969-09-25
DE1547661A1 (en) 1969-11-20
CH467475A (en) 1969-01-15
BE700589A (en) 1967-12-27
US3615789A (en) 1971-10-26
FR1605075A (en) 1973-01-12
NL6708943A (en) 1967-12-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees