WO1994026661A1 - Regeneration de charbons actifs - Google Patents

Regeneration de charbons actifs Download PDF

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Publication number
WO1994026661A1
WO1994026661A1 PCT/GB1994/001063 GB9401063W WO9426661A1 WO 1994026661 A1 WO1994026661 A1 WO 1994026661A1 GB 9401063 W GB9401063 W GB 9401063W WO 9426661 A1 WO9426661 A1 WO 9426661A1
Authority
WO
WIPO (PCT)
Prior art keywords
carbon
degenerated
microwave
adsorbent
microwave radiation
Prior art date
Application number
PCT/GB1994/001063
Other languages
English (en)
Inventor
Kenneth Michael Holland
Original Assignee
Kenneth Michael Holland
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 Kenneth Michael Holland filed Critical Kenneth Michael Holland
Priority to AU66568/94A priority Critical patent/AU6656894A/en
Publication of WO1994026661A1 publication Critical patent/WO1994026661A1/fr

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Classifications

    • 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
    • C01B32/36—Reactivation or regeneration
    • C01B32/366—Reactivation or regeneration by physical processes, e.g. by irradiation, by using electric current passing through carbonaceous feedstock or by using recyclable inert heating bodies

Definitions

  • the present invention relates to adsorbent (or "active") carbons.
  • Amorphous carbon particles which have high internal porosity are extensively used as adsorbent media in gas and water purification, de-colouring, de-toxification and other separation systems.
  • carbon having a surface area in excess of 300 m ⁇ /gm is referred to as "activated”.
  • a method of activating degenerated adsorbent carbon comprising directing microwave radiation at degenerated carbon so as to substantially re-convert said degenerated carbon into active form.
  • adsorbent carbon which method comprises:
  • step (c) directing microwave radiation at degenerated carbon obtained by step (b), so as to substantially re-convert said degenerated carbon into active form.
  • Step (c) is such as to avoid formation of dioxins; re-activation of activated carbon by traditional methods is an oxidising process, whereas regeneration by the present method allows the reducing property of carbon to be exploited .
  • the adsorbent carbon may itself be prepared from starting media such as carbon black, sewage, waste vegetable matter or the like.
  • the particulate degenerated carbon is arranged in a microwave treatment zone in the method according to the invention.
  • the microwave treatment zone may comprise a microwave-resistant chamber, such as a fire brick-lined or refractory-lined stainless steel or ceramic housing .
  • the frequency of the microwave radiation employed is such that it causes substantial heating of the degenerated carbon. Typically, it is in the low gigahertz frequency range, for example suitably less than about 10 gigahertz and most preferably about 0.9 to 2.5 gigahertz. However, higher and lower frequencies may be utilised as appropriate for particular materials and depth of bed of the material .
  • one or more microwave generators are arranged adjacent the zone so as to direct microwave radiation at the degenerated carbon, so as to be capable of re-converting the former into active carbon.
  • the temperature rise achieved by the use of microwaves is readily controllable, and avoids use of mechanical force and attrition of the particles during heating.
  • the generators may be of similar power output, or, alternatively of graduated power output.
  • the degenerated carbon generally has a substantially impaired porous structure when compared to the structure of active carbon, typically as a result* of substantial use thereof in a process such as filtration.
  • the degenerated carbon may be contaminated with waste materials, and may, for example, contain volatile organic compounds or the like.
  • the microwave treatment is carried out in an atmosphere under which flame generation is substantially prevented.
  • the atmosphere is substantially oxygen-free, and advantageously comprises an inert medium such as nitrogen, or a hydrocarbon gaseous medium, such as hydrogen, methane or the like.
  • the method of use of adsorbent carbon comprises regeneration of an active carbon filtration medium.
  • a method of using a filtration medium comprising adsorbent carbon which method comprises employing said medium in a filtration method whereby said medium becomes - k -
  • the regeneration of the degenerated filtration medium may be particularly advantageous in enhancing the porosity of the degenerated medium for subsequent re-use thereof in filtration techniques.
  • the regenerated active carbon is suitable for use in filtration of liquids, and preferably has a holding power equal to at least 157» by weight thereof.
  • the method preferably involves arrangement of the adsorbent carbon in a filtration environment, such as a receptacle or the like, followed by arrangement of the resultant degenerated carbon in a microwave treatment zone, which typically comprises a microwave-resistant chamber, such as a fire brick-lined or refractory-lined stainless steel or ceramic housing.
  • a microwave treatment zone typically comprises a microwave-resistant chamber, such as a fire brick-lined or refractory-lined stainless steel or ceramic housing.
  • the accompanying single Figure is a graph illustrating the effect on the adsorption capacity of active carbon on Congo Red before and after regeneration by microwave heating.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Inorganic Chemistry (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

L'invention concerne un procédé d'activation de charbon adsorbant dégénéré qui consiste à diriger un rayonnement à hyperfréquence sur le charbon dégénéré de façon à reconvertir sensiblement ce charbon dégénéré sous forme active. On peut utiliser le charbon adsorbant: a) en produisant un matériau de départ comprenant le charbon adsorbant; b) en mettant en ÷uvre un procédé qui provoque la dégénération substantielle de ce charbon; et c) en dirigeant un rayonnement à hyperfréquence sur le charbon dégénéré obtenu à l'étape (b) de façon à reconvertir sensiblement ce charbon dégénéré sous forme active. Ceci permet d'obtenir une régénération efficace du charbon actif qui est ensuite approprié à d'autres usages et utilisé comme milieu adsorbant dans la purification du gaz et de l'eau, ce qui évite ainsi d'acheter de nouveaux matériaux.
PCT/GB1994/001063 1993-05-18 1994-05-18 Regeneration de charbons actifs WO1994026661A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU66568/94A AU6656894A (en) 1993-05-18 1994-05-18 Regeneration of activated carbons

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9310206.9 1993-05-18
GB939310206A GB9310206D0 (en) 1993-05-18 1993-05-18 Absorbent carbon

Publications (1)

Publication Number Publication Date
WO1994026661A1 true WO1994026661A1 (fr) 1994-11-24

Family

ID=10735676

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1994/001063 WO1994026661A1 (fr) 1993-05-18 1994-05-18 Regeneration de charbons actifs

Country Status (4)

Country Link
AU (1) AU6656894A (fr)
GB (1) GB9310206D0 (fr)
WO (1) WO1994026661A1 (fr)
ZA (1) ZA943432B (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998017365A1 (fr) * 1996-10-21 1998-04-30 Project Earth Industries, Inc. Particules a proprietes ameliorees d'adsorption et de catalyse a temperature ambiante et procede de production et d'utilisation desdites particules
US5948726A (en) * 1994-12-07 1999-09-07 Project Earth Industries, Inc. Adsorbent and/or catalyst and binder system and method of making therefor
US5985790A (en) * 1994-12-07 1999-11-16 Project Earth Industries, Inc. Method of making acid contacted enhanced aluminum oxide adsorbent particle
ES2143412A1 (es) * 1998-04-21 2000-05-01 Consejo Superior Investigacion Proceso asistido por microondas para la obtencion de materiales carbonosos de naturaleza basica y dispositivo.
KR20020013801A (ko) * 2000-08-12 2002-02-21 이길환 마이크로파를 이용한 활성탄의 제조 및 폐활성탄의 재생방법
MD2333G2 (ro) * 2003-02-20 2004-06-30 Институт Химии Академии Наук Молдовы Procedeu de regenerare a cărbunelui activ epuizat în procesul de tratare a apei
ES2246655A1 (es) * 2003-09-12 2006-02-16 Consejo Sup. De Invest. Cientificas Proceso para la obtencion de tamices moleculares de carbon.
CN100334237C (zh) * 2003-08-30 2007-08-29 大连理工大学 一种载金活性炭的再生方法
US7744824B2 (en) 2005-12-23 2010-06-29 Hamilton Sundstrand Corporation On-board fuel desulfurization unit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2107717A1 (en) * 1971-02-18 1972-08-31 Bamag Verfahrenstechnik Gmbh, 6308 Butzbach Regeneration reactor for adsorbents - heated by microwave
JPS5760281A (en) * 1980-09-29 1982-04-12 Seiko Epson Corp Control circuit for digital clock
DE3834831A1 (de) * 1988-10-13 1990-04-19 Fm Filtermaschinenbau Gmbh Verfahren und einrichtung zum reaktivieren eines kohlefilters
DE4104513A1 (de) * 1990-02-14 1991-08-29 Chmiel Horst Verfahren zur regeneration von adsorbern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2107717A1 (en) * 1971-02-18 1972-08-31 Bamag Verfahrenstechnik Gmbh, 6308 Butzbach Regeneration reactor for adsorbents - heated by microwave
JPS5760281A (en) * 1980-09-29 1982-04-12 Seiko Epson Corp Control circuit for digital clock
DE3834831A1 (de) * 1988-10-13 1990-04-19 Fm Filtermaschinenbau Gmbh Verfahren und einrichtung zum reaktivieren eines kohlefilters
DE4104513A1 (de) * 1990-02-14 1991-08-29 Chmiel Horst Verfahren zur regeneration von adsorbern

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 85, no. 22, 29 November 1976, Columbus, Ohio, US; abstract no. 162542k, page 144; *
CHEMICAL ABSTRACTS, vol. 87, no. 10, 5 September 1977, Columbus, Ohio, US; abstract no. 70374v, page 124; *
CHEMICAL ABSTRACTS, vol. 87, no. 2, 11 July 1977, Columbus, Ohio, US; abstract no. 8041f, page 124; *
CHEMICAL ABSTRACTS, vol. 88, no. 10, 6 March 1978, Columbus, Ohio, US; abstract no. 65675k, page 212; *
CHEMICAL ABSTRACTS, vol. 99, no. 2, 11 July 1983, Columbus, Ohio, US; abstract no. 7671x, page 105; *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5948726A (en) * 1994-12-07 1999-09-07 Project Earth Industries, Inc. Adsorbent and/or catalyst and binder system and method of making therefor
US5985790A (en) * 1994-12-07 1999-11-16 Project Earth Industries, Inc. Method of making acid contacted enhanced aluminum oxide adsorbent particle
US6338830B1 (en) 1994-12-07 2002-01-15 Apyron Technologies, Inc. Absorbent and/or catalyst and binder system and method of making and using therefor
US5955393A (en) * 1995-04-21 1999-09-21 Project Earth Industries, Inc. Enhanced adsorbent and room temperature catalyst particle and method of making therefor
WO1998017365A1 (fr) * 1996-10-21 1998-04-30 Project Earth Industries, Inc. Particules a proprietes ameliorees d'adsorption et de catalyse a temperature ambiante et procede de production et d'utilisation desdites particules
ES2143412A1 (es) * 1998-04-21 2000-05-01 Consejo Superior Investigacion Proceso asistido por microondas para la obtencion de materiales carbonosos de naturaleza basica y dispositivo.
KR20020013801A (ko) * 2000-08-12 2002-02-21 이길환 마이크로파를 이용한 활성탄의 제조 및 폐활성탄의 재생방법
MD2333G2 (ro) * 2003-02-20 2004-06-30 Институт Химии Академии Наук Молдовы Procedeu de regenerare a cărbunelui activ epuizat în procesul de tratare a apei
CN100334237C (zh) * 2003-08-30 2007-08-29 大连理工大学 一种载金活性炭的再生方法
ES2246655A1 (es) * 2003-09-12 2006-02-16 Consejo Sup. De Invest. Cientificas Proceso para la obtencion de tamices moleculares de carbon.
US7744824B2 (en) 2005-12-23 2010-06-29 Hamilton Sundstrand Corporation On-board fuel desulfurization unit
US8466079B2 (en) 2005-12-23 2013-06-18 Hamilton Sundstrand Corporation On-board fuel desulfurization unit

Also Published As

Publication number Publication date
GB9310206D0 (en) 1993-06-30
AU6656894A (en) 1994-12-12
ZA943432B (en) 1995-02-09

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