Bubble column and the use thereof
Patent 6375921 Issued on April 23, 2002. Estimated Expiration Date: 
May 23, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 23, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3073680 3752885 3853986 Sieve plates and distillation columns Liquid-phase catalyst-assembly for chemical process tower Process for the preparation of hydrogen peroxide Patent #: 5725837 InventorsAssigneeApplicationNo. 576178 filed on 05/23/2000US Classes:423/588, By oxidizing hydroquinone or anthraquinone261/114.1, Overflow baffles261/114.3, Jet plates422/189, And means providing discrete sequential reaction stages; e.g., train, etc.422/190, Plural solid, extended surface, fluid contact reaction stages each containing; e.g., inert Raschig rings, particulate sorbent, particulate or monolithic catalyst, etc.422/191, Superimposed reaction stages in single reaction chamber423/659MISCELLANEOUS PROCESSExaminersPrimary: Langel, Wayne A.Attorney, Agent or FirmForeign Patent References
International ClassesC01B 015/023F02M 029/04 Foreign Application Priority Data1998-09-23 DEAbstractA bubble column can be operated using countercurrent flow including perforated trays. The space-time yield of gas-liquid reactions can be considerably increased if the perforated trays have a substantially uniform distribution of holes, if the cross-sectional area of the individual holes is 0.003 to 3 mm2, particularly 0.01 to 0.5 mm2, and if the open area of the trays is 3 to 20%, particularly 3 to 10%, and if the bubble column comprises passages for liquid between adjacent liquid zones.The bubble column can be used for carrying out gas-liquid reactions, such as oxidation reactions with air, with the gas and liquid preferably being passed in countercurrent flow through the column. Cocurrent flow may also be used.Other References
Field of SearchMISCELLANEOUS PROCESSBy oxidizing hydroquinone or anthraquinone And means providing discrete sequential reaction stages; e.g., train, etc. Plural solid, extended surface, fluid contact reaction stages each containing; e.g., inert Raschig rings, particulate sorbent, particulate or monolithic catalyst, etc. Superimposed reaction stages in single reaction chamber Overflow baffles Jet plates |
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