Sieve plates and distillation columns
Liquid-phase catalyst-assembly for chemical process tower
Process for the preparation of hydrogen peroxide Patent #: 5725837
ApplicationNo. 576178 filed on 05/23/2000
US 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 PROCESS
ExaminersPrimary: Langel, Wayne A.
Attorney, Agent or Firm
Foreign Patent References
International ClassesC01B 015/023
Foreign Application Priority Data1998-09-23 DE
AbstractA 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.
Field of SearchMISCELLANEOUS PROCESS
By 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