FR2365539A1 - Reducing the permeability of carbon or graphite objects - by impregnation with a suspension of colloidal graphite - Google Patents

Reducing the permeability of carbon or graphite objects - by impregnation with a suspension of colloidal graphite

Info

Publication number
FR2365539A1
FR2365539A1 FR7723744A FR7723744A FR2365539A1 FR 2365539 A1 FR2365539 A1 FR 2365539A1 FR 7723744 A FR7723744 A FR 7723744A FR 7723744 A FR7723744 A FR 7723744A FR 2365539 A1 FR2365539 A1 FR 2365539A1
Authority
FR
France
Prior art keywords
graphite
impregnation
suspension
permeability
carbon
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.)
Withdrawn
Application number
FR7723744A
Other languages
French (fr)
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and 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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of FR2365539A1 publication Critical patent/FR2365539A1/en
Withdrawn legal-status Critical Current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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • 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
    • C04B41/4505—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application
    • 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
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Ceramic Products (AREA)

Abstract

The permeability of a carbon object is reduced by using a min. pressure of 1.014 atmos. to impregnate the object with a liq. suspension contg. (by wt) na) 95-99.9% of a (non)polar liq. with freezing point below room temp.; and (b) 0.01-5 % fine carbonaceous particles. The prod. is used e.g. for the impregnation of graphite reaction vessels and pipes used in the chemical and metallurgical industries. Graphite is an excellent material for such uses but is disadvantage is its porosity. The process requires neither high temps. nor pressures to impregnate the object. Impregnation can be achieved using an aq. suspension e.g. of colloidal graphite, at room temp., forced into the pores of the graphite by compressed air.
FR7723744A 1976-09-24 1977-08-02 Reducing the permeability of carbon or graphite objects - by impregnation with a suspension of colloidal graphite Withdrawn FR2365539A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72629476A 1976-09-24 1976-09-24

Publications (1)

Publication Number Publication Date
FR2365539A1 true FR2365539A1 (en) 1978-04-21

Family

ID=24918009

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7723744A Withdrawn FR2365539A1 (en) 1976-09-24 1977-08-02 Reducing the permeability of carbon or graphite objects - by impregnation with a suspension of colloidal graphite

Country Status (6)

Country Link
JP (1) JPS5340008A (en)
AU (1) AU2901577A (en)
BR (1) BR7706356A (en)
DE (1) DE2742703A1 (en)
FR (1) FR2365539A1 (en)
IT (1) IT1086368B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0521747A1 (en) * 1991-06-17 1993-01-07 Societe Europeenne De Propulsion Method for homogenous introducing of a solid charge in a porous substrate

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114804922B (en) * 2021-01-21 2024-05-14 邓茜丹 Air gouging carbon rod copper plating pretreatment hole sealing agent and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0521747A1 (en) * 1991-06-17 1993-01-07 Societe Europeenne De Propulsion Method for homogenous introducing of a solid charge in a porous substrate
US5281439A (en) * 1991-06-17 1994-01-25 Societe Europeenne De Propulsion Process for uniformly integrating a solid charge within a porous substrate

Also Published As

Publication number Publication date
DE2742703A1 (en) 1978-03-30
IT1086368B (en) 1985-05-28
AU2901577A (en) 1979-03-29
JPS5340008A (en) 1978-04-12
BR7706356A (en) 1978-08-08

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Legal Events

Date Code Title Description
ST Notification of lapse