GB1305046A - - Google Patents

Info

Publication number
GB1305046A
GB1305046A GB5753170A GB5753170A GB1305046A GB 1305046 A GB1305046 A GB 1305046A GB 5753170 A GB5753170 A GB 5753170A GB 5753170 A GB5753170 A GB 5753170A GB 1305046 A GB1305046 A GB 1305046A
Authority
GB
United Kingdom
Prior art keywords
graphite
temperature
diamond
carbon
calcium oxide
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
GB5753170A
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 filed Critical
Publication of GB1305046A publication Critical patent/GB1305046A/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
    • B01J2203/0625—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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

1305046 Producing diamond UKRAINSKY ORDENA TRUDOVOGO KRASNOGO ZNAMENI NAUCHNO - ISSLEDOVATELSKY KONSTRUKTORSKO - TEKHNOLOGICHESKY INSTITUT SINTETICHESKIKH SVERKHTVERDYKH MATERIALOV I INSTRUMENTA GOSPLANA UKRAINSKOI SSR 3 Dec 1970 [4 May 1970] 57531/70 Heading C1A Diamonds are prepared by subjecting a carboniferous material, i.e. carbon or a material which decomposes to give free carbon under the conditions used, and calcium oxide in direct contact therewith to a temperature of at least 1800‹ C. and a pressure corresponding to that temperature within the diamond stable region of the carbon-graphite-diamond phase equilibrium diagram. The temperature is preferably at least 2000‹ C. and the pressure at least 80k.bars. The preferred carboniferous material is graphite which may be spectrally pure graphite. The calcium oxide may be mixed into a homogenous mixture with the graphite, or the reaction mix may comprise discs of CaO and graphite which are packed in alternating array into the chamber.
GB5753170A 1970-05-04 1970-12-03 Expired GB1305046A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1423098 1970-05-04

Publications (1)

Publication Number Publication Date
GB1305046A true GB1305046A (en) 1973-01-31

Family

ID=20451526

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5753170A Expired GB1305046A (en) 1970-05-04 1970-12-03

Country Status (8)

Country Link
AT (1) AT328412B (en)
BE (1) BE759748A (en)
CA (1) CA945045A (en)
CH (1) CH557299A (en)
FR (1) FR2072780A5 (en)
GB (1) GB1305046A (en)
IE (1) IE35188B1 (en)
SE (1) SE371806B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000560A1 (en) * 1979-08-30 1981-03-05 Vnii Sinteza Mineral Method of making diamonds

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000560A1 (en) * 1979-08-30 1981-03-05 Vnii Sinteza Mineral Method of making diamonds

Also Published As

Publication number Publication date
CA945045A (en) 1974-04-09
ATA1038270A (en) 1975-06-15
IE35188L (en) 1971-11-04
BE759748A (en) 1971-06-02
AT328412B (en) 1976-03-25
SE371806B (en) 1974-12-02
DE2056764A1 (en) 1971-11-18
DE2056764B2 (en) 1977-06-02
CH557299A (en) 1974-12-31
FR2072780A5 (en) 1971-09-24
IE35188B1 (en) 1975-12-10

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Legal Events

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