GB1505095A - Process for the manufacture of activated carbon - Google Patents

Process for the manufacture of activated carbon

Info

Publication number
GB1505095A
GB1505095A GB46465/75A GB4646575A GB1505095A GB 1505095 A GB1505095 A GB 1505095A GB 46465/75 A GB46465/75 A GB 46465/75A GB 4646575 A GB4646575 A GB 4646575A GB 1505095 A GB1505095 A GB 1505095A
Authority
GB
United Kingdom
Prior art keywords
furnace
cloth
frame
lid
inert gas
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
GB46465/75A
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.)
Clairaire Ltd
Original Assignee
Clairaire Ltd
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 Clairaire Ltd filed Critical Clairaire Ltd
Priority to GB46465/75A priority Critical patent/GB1505095A/en
Publication of GB1505095A publication Critical patent/GB1505095A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
    • D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
    • D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
    • D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
    • D01F9/16—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from products of vegetable origin or derivatives thereof, e.g. from cellulose acetate
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/30—Active carbon
    • C01B32/354—After-treatment
    • C01B32/382—Making shaped products, e.g. fibres, spheres, membranes or foam

Abstract

1505095 Activated carbon CLAIRAIRE Ltd 11 Nov 1976 [11 Nov 1975] 46465/75 Heading C1A A batch process for the production of materials composed wholly or predominantly of activated carbon from cellulosic cloth, especially a viscose rayon cloth, comprises padding the cloth to be carbonized with a solution of Lewis acid which is a halide of zinc, aluminium, calcium, magnesium or iron, drying and overfeeding the cloth over a breaking machine to soften the cloth, applying the cloth on to a drying frame in a tensionless condition, placing the frame in a furnace maintained at a pressure above atmosphere by an inert gas, passing the inert gas through the cloth depending from the frame and gradually heating the furnace to 300‹ C. over a period of 2 to 3 hours to drive off volatiles from the cloth, heating the cloth to substantially 900‹ to 950‹ C. over a period of substantially two hours, maintaining the temperature for a period of approximately one half hour, cooling the furnace to substantially 100‹ C. whilst maintaining an inert atmosphere therein and finally removing the lid or cover and the frame from the furnace. The process may be effected in a heat insulated furnace in which the cloth is suspended from hooks 1 on a frame or frames 2 attached to the underside of the lid 3 of the furnace. The furnace is heated by electric heat 4 and its sides and bottom are lagged with insulating material 6. Holes 9 in the lid provide for the escape of fumes. Carbon dioxide or other inert gas is supplied to the furnace by pipe 9, displacing air via holes 7. The supply of gas is then continued at slightly above atmospheric pressure during the heating cycle. The furnace is then allowed to cool to 100‹ C. while maintaining the inert atmosphere, and the lid 3 is then removed with the cloth. Cooling of the furnace is accelerated by circulating cooling air or liquid through pipes 12 in the furnace wall insulation, the exhaust gases from the furnace during cooling being fed to the inert gas inlet of a second furnace to preheat the material therein.
GB46465/75A 1976-11-11 1976-11-11 Process for the manufacture of activated carbon Expired GB1505095A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB46465/75A GB1505095A (en) 1976-11-11 1976-11-11 Process for the manufacture of activated carbon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB46465/75A GB1505095A (en) 1976-11-11 1976-11-11 Process for the manufacture of activated carbon

Publications (1)

Publication Number Publication Date
GB1505095A true GB1505095A (en) 1978-03-22

Family

ID=10441386

Family Applications (1)

Application Number Title Priority Date Filing Date
GB46465/75A Expired GB1505095A (en) 1976-11-11 1976-11-11 Process for the manufacture of activated carbon

Country Status (1)

Country Link
GB (1) GB1505095A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2915640A1 (en) * 1978-04-21 1979-10-31 Clairaire Ltd PROCESS FOR PRODUCING ACTIVATED CHARCOAL
US4274979A (en) * 1978-04-21 1981-06-23 Clairaire Limited Manufacture of activated carbon
US4409125A (en) 1978-06-22 1983-10-11 Takeda Chemical Industries, Ltd. Process for producing activated fibrous carbon

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2915640A1 (en) * 1978-04-21 1979-10-31 Clairaire Ltd PROCESS FOR PRODUCING ACTIVATED CHARCOAL
FR2423443A1 (en) * 1978-04-21 1979-11-16 Clairaire Ltd Active carbon prepn. from tension-free hanging fibrous cellulose - by carbonisation with Lewis acid and activation with further heating
US4274979A (en) * 1978-04-21 1981-06-23 Clairaire Limited Manufacture of activated carbon
US4409125A (en) 1978-06-22 1983-10-11 Takeda Chemical Industries, Ltd. Process for producing activated fibrous carbon

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19961110