Process for continuous oxidation

a technology of oxidation and process, applied in chemical/physical/physical-chemical processes, chemical compound preparations, organic chemistry, etc., can solve the problems of pressure drop due to fittings such as perforated plates, pressure drop due to perforated plates, and uneconomical technical complexity
US20020065440A1Inactive Publication Date: 2002-05-30DEGUSSA AG
0 Cites 5 Cited by

Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
DEGUSSA AG
Publication Date
2002-05-30
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

A continuous process for oxidation, in which the substance to be oxidized and the oxidizing gas flow countercurrently and the oxidizing gas is mixed with a split stream containing preoxidized substance before it enters the reactor. A Venturi nozzle is particularly suitable as the mixing organ in the reactor.
Need to check novelty before this filing date? Find Prior Art

Description

INTRODUCTION AND BACKGROUND

[0001] The present invention concerns a continuous process for oxidation. This process is particularly suitable for the oxidation step in the anthraquinone process for production of hydrogen peroxide, in which substituted anthrahydroquinones are oxidized by oxidation with an oxygen-containing gas to form substituted anthraquinones and hydrogen peroxide.

[0002] In the anthraquinone process this oxidation was initially performed cocurrently in gas distribution towers connected in series using fresh air in each tower, which was both technically complicated and uneconomic. Although the oxidation rate could be increased in a cocurrent flow of air and working solution according to U.S. Pat. No. 3,073,680 whilst retaining specific bubble sizes, obtainable by means of fine-pore gas distributor organs and specific cross-sectional loads, problems arose with the removal of the resulting foam and with the gas-liquid phase separation.

[0003] U.S. Pat. No. 2,902,347 descr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More