GB874291A - Method of converting carbonaceous material to diamond - Google Patents

Method of converting carbonaceous material to diamond

Info

Publication number
GB874291A
GB874291A GB12968/58A GB1296858A GB874291A GB 874291 A GB874291 A GB 874291A GB 12968/58 A GB12968/58 A GB 12968/58A GB 1296858 A GB1296858 A GB 1296858A GB 874291 A GB874291 A GB 874291A
Authority
GB
United Kingdom
Prior art keywords
carbonaceous material
alloy
cylinder
hollow
metals
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
GB12968/58A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB874291A publication Critical patent/GB874291A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
    • B01J3/06—Processes using ultra-high pressure, e.g. for the formation of diamonds; Apparatus therefor, e.g. moulds or dies
    • B01J3/062—Processes using ultra-high pressure, e.g. for the formation of diamonds; Apparatus therefor, e.g. moulds or dies characterised by the composition of the materials to be processed
    • 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
    • B01J2203/00—Processes utilising sub- or super atmospheric pressure
    • B01J2203/06—High pressure synthesis
    • B01J2203/0605—Composition of the material to be processed
    • B01J2203/061—Graphite
    • 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
    • B01J2203/00—Processes utilising sub- or super atmospheric pressure
    • B01J2203/06—High pressure synthesis
    • B01J2203/0605—Composition of the material to be processed
    • B01J2203/0625—Carbon
    • 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
    • B01J2203/00—Processes utilising sub- or super atmospheric pressure
    • B01J2203/06—High pressure synthesis
    • B01J2203/065—Composition of the material produced
    • B01J2203/0655—Diamond
    • 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
    • B01J2203/00—Processes utilising sub- or super atmospheric pressure
    • B01J2203/06—High pressure synthesis
    • B01J2203/0675—Structural or physico-chemical features of the materials processed
    • B01J2203/068—Crystal growth

Abstract

<PICT:0874291/III/1> Carbonaceous material is subjected to a pressure of 50,000-110,000 atmospheres and a temperature of 1200-3500 DEG C. in the presence of a catalyst comprising an alloy of at least two metals, at least one of said metals being a Group VIII metal, chromium, tantalum, or manganese, so as to produce diamond. The reaction time may be between 1 sec. and 4 mins. The carbonaceous material may be in the form of charcoal, coke, coal, graphite, coal tar pitch, wood, paper, lithium carbide or naphthalene. The alloy may comprise 2-10% or more of each metal. 01-10 parts, preferably 0.5-2 parts, of alloy per part of carbonaceous material may be employed. The product may be treated with fuming nitric acid. As shown, a central cylindrical alloy slug 34 and two outer cylindrical graphite slugs 35 are compressed according to Specification 830,210 within a hollow pyrophyllite cylinder 31 and end platinum discs 32, heat being supplied by passage of an electric current through the slug assembly. In an alternative, cylinder 31 may contain an alloy wire and a surrounding hollow cylinder of carbonaceous material. In a further alternative, cylinder 31 may contain a hollow alloy cylinder packed with carbonaceous material. Examples are given. Specification 871,645 also is referred to.
GB12968/58A 1957-04-29 1958-04-23 Method of converting carbonaceous material to diamond Expired GB874291A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US874291XA 1957-04-29 1957-04-29

Publications (1)

Publication Number Publication Date
GB874291A true GB874291A (en) 1961-08-02

Family

ID=22205137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12968/58A Expired GB874291A (en) 1957-04-29 1958-04-23 Method of converting carbonaceous material to diamond

Country Status (1)

Country Link
GB (1) GB874291A (en)

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