GB791602A - Fluid-impervious graphitic articles and method of making the same - Google Patents

Fluid-impervious graphitic articles and method of making the same

Info

Publication number
GB791602A
GB791602A GB16539/55A GB1653955A GB791602A GB 791602 A GB791602 A GB 791602A GB 16539/55 A GB16539/55 A GB 16539/55A GB 1653955 A GB1653955 A GB 1653955A GB 791602 A GB791602 A GB 791602A
Authority
GB
United Kingdom
Prior art keywords
article
temperature
oxide
impervious
graphite
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
GB16539/55A
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Publication of GB791602A publication Critical patent/GB791602A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C04B35/521—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained by impregnation of carbon products with a carbonisable material
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5001—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with carbon or carbonisable materials

Abstract

An article of porous graphite is rendered impervious to liquids and gases by impregnating with a CO disproportionating catalyst and passing CO through the pores of the graphite at a temperature suitable for its disproportionation, thereby depositing carbon in the pores. Catalysts specified are the oxides of iron, nickel, cobalt, chromium, molybdenum and vanadium. A saturated aqueous solution of a heat decomposable salt may be employed, and impregnation effected under reduced or atmospheric pressure, the article dried by heating to 100 DEG C. and the salt decomposed to oxide by heating to approximately 600 DEG C. In the case of large pieces of graphite, the heating may be conducted in an inert atmosphere. Disproportionation may be effected with iron oxide at a temperature of 400-650 DEG C., preferably 575 DEG C., cobalt oxide at a temperature of 550-700 DEG C., preferably 650 DEG C., and nickel oxide at a temperature of 400-575 DEG C., preferably 475 DEG C. With an article having a porosity of 0.085 D'Arcy, about 10 per cent of carbon is required to render the article impervious. In the example a porous graphite disc was impregnated with Fe(NO3)3, after drying at 100 DEG C. the disc was heated for 2-3 minutes at 600 DEG C. CO was then passe through for 200 hours at 575 DEG C. The permeability thereby dropped from 0.085 to 0.0003 D'Arcy.
GB16539/55A 1954-06-23 1955-06-08 Fluid-impervious graphitic articles and method of making the same Expired GB791602A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US791602XA 1954-06-23 1954-06-23

Publications (1)

Publication Number Publication Date
GB791602A true GB791602A (en) 1958-03-05

Family

ID=22148805

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16539/55A Expired GB791602A (en) 1954-06-23 1955-06-08 Fluid-impervious graphitic articles and method of making the same

Country Status (1)

Country Link
GB (1) GB791602A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2422440A1 (en) * 1977-07-21 1979-11-09 Trw Inc HIGH-ACTIVITY CARBON MATERIAL AND PROCESS FOR ITS PRODUCTION, AS WELL AS ITS APPLICATION
US4710483A (en) * 1977-07-21 1987-12-01 Trw Inc. Novel carbonaceous material and process for producing a high BTU gas from this material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2422440A1 (en) * 1977-07-21 1979-11-09 Trw Inc HIGH-ACTIVITY CARBON MATERIAL AND PROCESS FOR ITS PRODUCTION, AS WELL AS ITS APPLICATION
US4710483A (en) * 1977-07-21 1987-12-01 Trw Inc. Novel carbonaceous material and process for producing a high BTU gas from this material

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