Process for recharging the reaction tubes of a tube bundle reactor with a new fixed catalyst bed
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C07D-307/34
C07C-051/14
C07C-051/16
C07C-051/42
B01J-008/06
B01J-008/00
B08B-009/043
출원번호
US-0130116
(2008-05-30)
등록번호
US-9126171
(2015-09-08)
우선권정보
DE-10 2007 025 869 (2007-06-01)
발명자
/ 주소
Schliephake, Volker
Bott, Klaus
Becher, Rolf-Dieter
Mueller-Engel, Klaus Joachim
Petzoldt, Jochen
Cremer, Ulrich
Raichle, Andreas
출원인 / 주소
BASF SE
대리인 / 주소
Oblon, McClelland, Maier & Neustadt, L.L.P.
인용정보
피인용 횟수 :
1인용 특허 :
19
초록▼
A process for recharging the reaction tubes of a tube bundle reactor with a new fixed catalyst bed, in which a heterogeneously catalyzed partial gas phase oxidation of an organic compound had been performed beforehand in a preceding fixed catalyst bed comprising Mo-comprising multielement oxide acti
A process for recharging the reaction tubes of a tube bundle reactor with a new fixed catalyst bed, in which a heterogeneously catalyzed partial gas phase oxidation of an organic compound had been performed beforehand in a preceding fixed catalyst bed comprising Mo-comprising multielement oxide active compositions to form a steam-comprising product gas mixture, in which, before the recharge, solid deposit which had been deposited on the tube inner walls and comprises molybdenum oxide and/or molybdenum oxide hydrate is brushed away with the aid of a brush.
대표청구항▼
1. A process for recharging the reaction tubes of a tube bundle reactor with a new fixed catalyst bed for the purpose of performing a new heterogeneously catalyzed partial gas phase oxidation of an organic starting compound in the new fixed catalyst bed, in which, before the recharge of the reaction
1. A process for recharging the reaction tubes of a tube bundle reactor with a new fixed catalyst bed for the purpose of performing a new heterogeneously catalyzed partial gas phase oxidation of an organic starting compound in the new fixed catalyst bed, in which, before the recharge of the reaction tubes of the tube bundle reactor with the new fixed catalyst bed in the same reaction tubes, a heterogeneously catalyzed partial preceding gas phase oxidation of an organic compound has been performed in a preceding fixed catalyst bed which was disposed in the reaction tubes and comprised at least shaped catalyst bodies whose active composition is a multielement oxide comprising the element Mo in the oxidized state to obtain a steam-comprising product gas mixture, and the preceding fixed catalyst bed, after this partial oxidation has ended, has been withdrawn from the reaction tubes, wherein, between the withdrawal of the preceding fixed catalyst bed from the reaction tubes and the recharge of these reaction tubes with the new fixed catalyst bed, at least in some of the reaction tubes, a solid film (solid deposit) which comprises molybdenum oxide and/or molybdenum oxide hydrate and has been deposited on their inner wall is brushed away at least partly with the aid of a brush, and wherein the process does not comprise blasting the reaction tubes. 2. The process according to claim 1, wherein the brush used is a cylindrical tube brush. 3. The process according to claim 1, wherein the brush used is a cylindrical tube brush with a spiral head. 4. The process according to claim 1, wherein the solid deposit brushed away from the inner wall of the reaction tubes is sucked out of the reaction tubes as soon as it is formed. 5. The process according to claim 1, wherein the heterogeneously catalyzed partial preceding gas phase oxidation is one of propylene to acrolein and/or acrylic acid, or of acrolein to acrylic acid, or of isobutene to methacrolein and/or methacrylic acid, or of methacrolein to methacrylic acid, or of propane to acrolein and/or acrylic acid, or of isobutane to methacrolein and/or methacrylic acid, or of propylene to acrylonitrile, or of propane to acrylonitrile, or of isobutene to methacrylonitrile, or of isobutane to methacrylonitrile, or of one or more C4 hydrocarbons to maleic anhydride, or of methanol to formaldehyde. 6. The process according to claim 2, wherein the solid deposit brushed away from the inner wall of the reaction tubes is sucked out of the reaction tubes as soon as it is formed. 7. The process according to claim 2, wherein the heterogeneously catalyzed partial preceding gas phase oxidation is one of propylene to acrolein and/or acrylic acid, or of acrolein to acrylic acid, or of isobutene to methacrolein and/or methacrylic acid, or of methacrolein to methacrylic acid, or of propane to acrolein and/or acrylic acid, or of isobutane to methacrolein and/or methacrylic acid, or of propylene to acrylonitrile, or of propane to acrylonitrile, or of isobutene to methacrylonitrile, or of isobutane to methacrylonitrile, or of one or more C4 hydrocarbons to maleic anhydride, or of methanol to formaldehyde. 8. The process according to claim 3, wherein the solid deposit brushed away from the inner wall of the reaction tubes is sucked out of the reaction tubes as soon as it is formed. 9. The process according to claim 3, wherein the heterogeneously catalyzed partial preceding gas phase oxidation is one of propylene to acrolein and/or acrylic acid, or of acrolein to acrylic acid, or of isobutene to methacrolein and/or methacrylic acid, or of methacrolein to methacrylic acid, or of propane to acrolein and/or acrylic acid, or of isobutane to methacrolein and/or methacrylic acid, or of propylene to acrylonitrile, or of propane to acrylonitrile, or of isobutene to methacrylonitrile, or of isobutane to methacrylonitrile, or of one or more C4 hydrocarbons to maleic anhydride, or of methanol to formaldehyde. 10. The process according to claim 4, wherein the heterogeneously catalyzed partial preceding gas phase oxidation is one of propylene to acrolein and/or acrylic acid, or of acrolein to acrylic acid, or of isobutene to methacrolein and/or methacrylic acid, or of methacrolein to methacrylic acid, or of propane to acrolein and/or acrylic acid, or of isobutane to methacrolein and/or methacrylic acid, or of propylene to acrylonitrile, or of propane to acrylonitrile, or of isobutene to methacrylonitrile, or of isobutane to methacrylonitrile, or of one or more C4 hydrocarbons to maleic anhydride, or of methanol to formaldehyde.
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이 특허에 인용된 특허 (19)
Hinago Hidenori,JPX ; Komada Satoru,JPX, Ammoxidation catalyst for use in producing acrylonitrile or methacrylonitrile from propane or isobutane by ammoxidation.
Tenten Andreas,DEX ; Weidlich Peter,DEX ; Linden Gerd,DEX, Catalyst consisting of a hollow cylindrical carrier having a catalytically active oxide material applied to the outer su.
Tenten Andreas,DEX ; Weidlich Peter,DEX ; Linden Gerd,DEX, Catalyst consisting of a hollow cylindrical carrier having a catalytically active oxide material applied to the outer surface of the carrier, and process for using said catalyst.
Dieterle, Martin; Petzoldt, Jochen; M?ller-Engel, Klaus Joachim; Arnold, Heiko, Heterogeneously catalyzed partial gas phase oxidation of propene to acrylic acid.
Lowry Richard P. (Corpus Christi TX) Chase Joseph D. (Corpus Christi TX) Cook Paul A. C. (Mendham NJ), Method for reducing molybdenum trioxide content of gases issuing from reactors containing molybdenum-based catalysts.
Yada,Shuhei; Hosaka,Hirochika; Goriki,Masayasu; Jinno,Kimikatsu; Ogawa,Yasushi; Suzuki,Yoshiro, Multitube reactor, vapor phase catalytic oxidation method using the multitube reactor, and start up method applied to the multitube reactor.
Yada,Shuhei; Hosaka,Hirochika; Goriki,Masayasu; Jinno,Kimikatsu; Ogawa,Yasushi; Suzuki,Yoshiro, Multitube reactor, vapor phase catalytic oxidation method using the multitube reactor, and start up method applied to the multitube reactor.
Tenten Andreas (Maikammer DEX) Weidlich Peter (Mannheim DEX) Linden Gerd (Heidelberg DEX), Preparation of a catalyst consisting of a carrier and a catalytically active oxide material applied to the surface of th.
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