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Process for producing bisphenol a and vertical fixed-bed reactor

A fixed-bed reactor, bisphenol technology, applied in the direction of organic chemical methods, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of acetone conversion rate decline, unavoidable degradation of sulfonic acid cation exchange resin catalyst, etc. To achieve the effect of preventing deterioration and long-term stable preparation

Active Publication Date: 2012-12-26
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But, even adopt these methods to react, also can't avoid the degradation of sulfonic acid type cation exchange resin catalyst, acetone conversion rate declines

Method used

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  • Process for producing bisphenol a and vertical fixed-bed reactor
  • Process for producing bisphenol a and vertical fixed-bed reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] used figure 1 The vertical fixed bed reactor shown. The bottom surface radius of reactor 1 is 2.8m, and 15% of filling sulfonic acid group is modified by 2-(4-pyridyl) ethanethiol sulfonic acid type cation exchange resin catalyst, makes catalyst layer height be 3.25m (catalyst amount : 80m 3 ). Two thermocouple thermometers 5 are arranged in the catalyst layer. Set location such as figure 1 Shown, in the horizontal direction of the catalyst layer, the distance r from the reactor periphery is the same position of 250cm, and the bottom surface of the catalyst layer in the height direction is 15cm (the distance from the bottom surface of the catalyst layer is 5%: measuring point 1= Symbol 52 in the figure) and 47 cm (14% from the bottom of the catalyst layer: measurement point 2 = symbol 53 in the figure). Furthermore, a thermocouple thermometer 6 (measuring point 0 = symbol 51 in the figure) was installed near the outlet of the reactor. Such as figure 1 As shown, i...

Embodiment 2

[0044] Use the basic structure with figure 1 The vertical fixed bed reactor shown is the same reactor. The bottom surface radius of reactor 1 is 3.3m, and 15% of filling sulfonic acid group is modified by 2-(4-pyridyl) ethanethiol sulfonic acid type cation exchange resin catalyst, makes catalyst layer height become 3.2m (catalyst amount : 110m 3 ). Two thermocouple thermometers 5 are arranged in the catalyst layer. The installation location is as follows, at the same position where the distance r from the outer circumference of the reactor is 300 cm in the horizontal direction of the catalyst layer, and 15 cm from the bottom surface of the catalyst layer in the height direction (5% from the bottom surface of the catalyst layer: measuring point 1 = symbol 52 in the figure) and 47 cm (14% from the bottom of the catalyst layer: measurement point 2 = symbol 53 in the figure). In the vertical fixed-bed reactor 1, valves 81-84 can be used to reverse the flow direction of the rea...

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Abstract

A process for producing bisphenol A which includes a reaction step in which raw-material phenol and raw-material acetone are passed through a vertical fixed-bed reactor packed with an ion-exchange resin catalyst to obtain a liquid reaction mixture containing bisphenol A, wherein at least part of the ion-exchange resin catalyst is caused to flow when the absolute value of the difference ( T) between the temperature of the liquid reaction mixture located in any position in the range of from the outlet of the ion-exchange resin catalyst layer formed in the reactor to 20% of the height of the catalyst layer and the temperature of the liquid reaction mixture at the outlet of the vertical fixed-bed reactor is 1.0-5.0°C. By the production process, the liquid reaction mixture which is passing through the ion-exchange resin catalyst in the reactor can be prevented from flowing unevenly and the catalyst can be prevented from suffering local deterioration. Thus, bisphenol A can be stably produced for long.

Description

technical field [0001] The present invention relates to the method for preparing bisphenol A and vertical fixed-bed reactor, relate to in detail by eliminating the bias flow (channel flow) of the reaction liquid that circulates in the ion-exchange resin catalyst in the reactor, prevent local catalyst from deteriorating, thereby A method for preparing bisphenol A and a vertical fixed-bed reactor for stably preparing bisphenol A for a long period of time. Background technique [0002] Bisphenol A is generally prepared by reacting phenol and acetone in the presence of an acidic catalyst. As the acidic catalyst, a sulfonic acid type cation exchange resin is generally used from the viewpoint of high reaction rate and good selectivity. The reaction is usually carried out continuously in a vertical fixed-bed reactor filled with a sulfonic acid-type cation exchange resin catalyst, in which the phenol raw material and the acetone raw material are circulated in a downflow manner. Af...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C37/20C07C39/16B01J8/02B01J31/10C07B61/00
CPCB01J2208/00061B01J2208/00884B01J2219/002B01J2208/0061B01J8/20B01J2208/00681B01J2219/00202B01J2219/00231C07C37/20B01J8/025B01J8/40B01J2219/00198C07C39/16B01J31/10B01J2208/00495B01J8/02C07B61/00
Inventor 田中竜郎佐田博
Owner MITSUBISHI RAYON CO LTD