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Patent Searching and Data


Title:
PROCESS AND APPARATUS FOR SULPHURIC ACID PRODUCTION
Document Type and Number:
WIPO Patent Application WO/2011/147538
Kind Code:
A3
Abstract:
A process for the conversion of sulphur dioxide contained in a feed gas to sulphur trioxide, comprising the steps of a) alternatingly providing a first feed gas containing a high concentration of sulphur dioxide and a second feed gas containing a low concentration of sulphur dioxide as a process gas, b) preheating the process gas by heat exchange with a heat exchange medium, c) reacting the process gas in the presence of a catalytically active material in a catalytic reaction zone, d) converting at least in part the sulphur dioxide of the process gas into sulphur trioxide contained in a product gas in the catalytic reaction zone, e) cooling the product gas by contact with a heat exchange medium, wherein a thermal buffer zone is provided in relation to one of said process steps, providing thermal energy produced during super-autothermal operation for heating the process gas during sub-autothermal operation.

Inventors:
MOELLERHOEJ MARTIN (DK)
LYKKE MADS (DK)
THELLEFSEN MORTEN (DK)
SCHOUBYE PETER (DK)
Application Number:
PCT/EP2011/002379
Publication Date:
February 09, 2012
Filing Date:
May 13, 2011
Export Citation:
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Assignee:
HALDOR TOPSOE AS (DK)
MOELLERHOEJ MARTIN (DK)
LYKKE MADS (DK)
THELLEFSEN MORTEN (DK)
SCHOUBYE PETER (DK)
International Classes:
C01B17/765
Foreign References:
US7691360B22010-04-06
US4016248A1977-04-05
US4046866A1977-09-06
US3671194A1972-06-20
US5480620A1996-01-02
EP0852159A21998-07-08
US5366708A1994-11-22
DE2648011A11978-04-27
Other References:
DAUM K H: "MEETING THE CHALLENGE OF HIGH-GRADE SO2", SULPHUR, BRITISH SULPHUR PUBLISHING, LONDON, GB, no. 287, 1 July 2003 (2003-07-01), pages 37,39 - 47, XP001212504, ISSN: 0039-4890
Attorney, Agent or Firm:
HALDOR TOPSØE A/S (Kgs. Lyngby, DK)
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