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Reactor with titanium silicate recycling

A technology of reactor and titanium silicate, applied in the direction of organic chemistry, organic chemical methods, chemical instruments and methods, etc., can solve problems such as membrane blocking

Inactive Publication Date: 2010-03-17
EVONIK DEGUSSA GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, experiments have shown that this measure can cause sudden blockage of the membrane under unfavorable reaction conditions

Method used

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  • Reactor with titanium silicate recycling
  • Reactor with titanium silicate recycling
  • Reactor with titanium silicate recycling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] described above with figure 1 Related experiments to explain the problem on which the present invention is based.

[0043] different from this, figure 2 Shown as a measure of membrane filtration efficiency after addition of 1.5% solids "Sipernat 320" (precipitated silicic acid available from Evonik Degussa GmbH) to 1.5% TS-1 (titanium silicate) dispersion and other conditions with figure 1 The experiment is the same as in the permeate flow process. It can be seen that the process procedure according to the invention leads to an asymptotic approach to a substantially constant base permeate flow (Sockel-Permeatfluss), however, without the addition of Sipernat, the blocked flow through the membrane dries up rapidly (cf. figure 1 ).

[0044] The reliable separation efficiency of the filter allows the construction of the plant for a continuous process of two-phase ammonia oxidation. However, periodically operated devices are also subject of the present invention. exist...

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PUM

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Abstract

The invention relates to reactor with titanium silicate recycling. The invention relates to a plant for carrying out chemical reactions, having a reactor (1), the reaction space of which contains hydrogen peroxide (H2O2) and titanium silicalite (TS-1). The object of the invention is to improve such a plant such that continuous separation and recycling of the active catalyst to the reaction space is possible with a long filter service life. This is achieved in that the reaction space contains a solid silicon source, in that the plant comprises a water takeoff line (3) which is set up for drawing off water in addition to components which are dissolved and / or dispersed therein from the reaction space, in that the water takeoff line (3) leads to a filter (4) which separates off the componentswhich are dissolved and / or dispersed in the water, and in that the plant has a return line (5) which is set up for recirculating to the reaction space components which are separated off by means of the filter (4).

Description

technical field [0001] The invention relates to a device for carrying out chemical reactions having at least one reactor whose reaction space contains hydrogen peroxide and titanium silicate. Such a device is known from EP 1316545B1. Furthermore, the invention relates to specific applications of the device, to the methods of carrying out reactions made possible by means of the device. Background technique [0002] Many industrial chemical reactions are carried out in the presence of titanium silicate, which acts as a catalyst in these reactions. For example, mention may be made of ammoxidation, ie the production of oximes from ketones or aldehydes. With regard to this reaction, see EP 1 316 545 B1 and likewise EP 1191 017 B1, the content of which is hereby incorporated by reference in its entirety. [0003] The titanium silicate is a catalyst based on titanium, silicon and oxygen; preferably in the form of a zeolite structure. Such a catalyst is available from Evonik Deg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07B43/00C07C249/04C07C251/32C07C251/44
CPCC07C251/44B01J8/20B01J8/009B01J2208/00867B01J8/006B01J2219/0004B01J29/89C07C249/04Y02P20/584
Inventor G·鲍姆加滕M·鲁斯S·沙弗莱因R·奥根斯坦
Owner EVONIK DEGUSSA GMBH