Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2008-04-23
2010-02-23
Puttlitz, Karl J (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C562S545000
Reexamination Certificate
active
07667072
ABSTRACT:
An object of the present invention is to provide a method for vapor phase catalytic oxidation which is almost free of variations in reaction states in respective reaction tubes of the fixed bed multi-tube heat-exchanger type reactor.Provided is a method for vapor phase catalytic oxidation for obtaining a reaction product gas by using a fixed bed multi-tube heat-exchanger type reactor provided with a plurality of reaction tubes and by feeding a raw material gas inside the reaction tubes packed with a catalyst, wherein the method comprises:adjusting pressure losses of the respective reaction tubes so that the pressure losses of the respective reaction tubes after catalyst packing is within ±20% of an average pressure loss of the reaction tubes by: packing an inert substance at a raw material gas inlet portion of the reaction tubes or removing and re-packing the catalyst packed, for a reaction tube having a pressure loss lower than the average pressure loss of the reaction tubes; and removing and re-packing the catalyst packed, for a reaction tube having a pressure loss higher than the average pressure loss of the reaction tubes.
REFERENCES:
patent: 4072601 (1978-02-01), Patouillet
patent: 4461327 (1984-07-01), Magin et al.
patent: 4571325 (1986-02-01), Nikolov et al.
patent: 5177260 (1993-01-01), Kawajiri et al.
patent: 5247970 (1993-09-01), Ryntveit et al.
patent: 5264627 (1993-11-01), Tazaki et al.
patent: 5276178 (1994-01-01), Onodera et al.
patent: 5292904 (1994-03-01), Sawada et al.
patent: 6333011 (2001-12-01), Schliephake et al.
patent: 6399818 (2002-06-01), Tanimoto et al.
patent: 2001/0046463 (2001-11-01), Harper et al.
patent: 2002/0136678 (2002-09-01), Tanimoto et al.
patent: 2003/0068261 (2003-04-01), Taheri et al.
patent: 2004/0024268 (2004-02-01), Franz et al.
patent: 40018 (1986-10-01), None
patent: 1156027 (2001-11-01), None
patent: 60-136344 (1985-09-01), None
patent: 5-97730 (1993-04-01), None
patent: 5-261272 (1993-10-01), None
patent: 6-7669 (1994-01-01), None
patent: 2001-328951 (2001-11-01), None
patent: 2002-306953 (2002-10-01), None
patent: 2003-1094 (2003-01-01), None
patent: 2003-340267 (2003-12-01), None
patent: 2003340267 (2003-12-01), None
patent: 1341824 (1994-10-01), None
Tone et al., Kagaku Kogaku (1966), 30(11), 1038-43.
International Search Report mailed Apr. 15, 2003 for International Application No. PCT/JP02/13372.
Supplementary Partial European Search Report mailed May 8, 2006 for European Application No. 02806067.
Patent Abstracts of Japan, vol. 018, No. 061, Feb. 2, 1994 & JP 05 279269 A, Oct. 26, 1993.
Foreign reference article 547.584.002.2, pp. 74-76.
Valentin Nikolov et al., “Achievements in the production of phthalic anhydride by vapour phase oxidation ofo-xylene on fixed catalyst bed.” Rassegne Di Scienza E Tecnologia, 72-1990, 111-114.
Valentin Nikolov et al., “Productivity of Modern Industrial Heterogeneous Catalytic Twin Processes—The Phthalic and Maleic Anhydride Syntheses.” Bulgarian Chemical Communications, vol. 31, No. ¾, pp. 505-520, 1999.
English translation of the IPER mailed Sep. 16, 2004 for International Application No. PCT/JP02/13372.
Chinese Office Action and English language translation thereof issued Nov. 24, 2006 for Chinese Application No. 2004100786010.
Russian Decision of Grant and English language translation thereof issued Mar. 22, 2007 for Russian Application No. 2004123098.
Office Action dated Jun. 3, 2008 in the parent application U.S. Appl. No. 10/864,492.
Zeiser, T. et al.,CFD-calculation of flow, dispersion and reaction in a catalyst filed tube by the lattice Boltzmann method, Chemical Engineering Science, vol. 56, No. 4 (2001), pp. 1697-1704.
Usami, Y. et al.,Heat and mass transfer in a reforming catalyst bed(analytical prediction of distributions in the catalyst bed),Nippon Kikai Gakkai Ronbunshu, B-hen, vol. 66, No. 641 (2000), pp. 203-210.
Narsimhan, G.,Catalyst dilution as a means to establish an optimum temperature profile, Industrial&Engineering Chemistry Process Design and Development, vol. 15, No. 2 (1976), pp. 302-307.
Borkink, J. et al.,Significance of the radial porosity profile for the description of heat transport in wall-cooled packed beds, Chemical Engineering Science, vol. 49, No. 6 (1994), pp. 863-876.
Tone, S. et al.,Analytical prediction of concentration and temperature profiles in a packed catalytic tube, Kagaku Kogaku, vol. 30, No. 11 (1966), pp. 1038-1043.
Notice of Reason for Rejection mailed May 20, 2008 in corresponding JP 2002-364643, with English translation thereof.
Notice of Reason for Rejection mailed May 20, 2008 in corresponding JP 2002-004635, with English translation thereof.
Akiyoshi Tamaki Edition, Handbook of Chemical Plant Construction, Maruzen Kabushiki Kaisha, Oct. 25, 1972, pp. 1276-1277, with English translation thereof.
Kenji Hashimoto Edition, Industrial Reactor—Selection • Design • Working Example—, Kabushiki Kaisha Baifukan, Feb. 25, 1984, pp. 42-45, 64 and 65, with English translation thereof.
Notice of Reason for Rejection mailed Feb. 20, 2007 in corresponding JP 2002-364643, with partial English translation.
Hosaka Hirochika
Saito Teruo
Suzuki Yoshiro
Yada Shuhei
Mitsubishi Chemical Corporation
Puttlitz Karl J
Wenderoth Lind & Ponack, LLP.
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