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Dynamic disc membrane device applied to recycling of ultrafine solid catalyst and technology of device

A solid catalyst and membrane device technology, applied in ultrafiltration, membrane technology, semi-permeable membrane separation, etc., can solve the problems of catalyst collision fragmentation, rising production cost, low catalyst content, etc., achieve long cleaning cycle, save labor, The effect of high separation accuracy

Active Publication Date: 2013-04-03
SHANGHAI ANHORN ENVIRONMENTAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the reaction process, the catalyst content is generally low, and the energy consumption caused by a large number of cycles is high, and the production cost rises.
At the same time, a large number of cycles make the catalyst collide and fragment, resulting in catalyst loss

Method used

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  • Dynamic disc membrane device applied to recycling of ultrafine solid catalyst and technology of device
  • Dynamic disc membrane device applied to recycling of ultrafine solid catalyst and technology of device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1: Catalyst recovery in the oximation process in the production of caprolactam

[0055] At present, titanium-silicon molecular sieves are used in China to catalyze the ammoximation of cyclohexanone to prepare cyclohexanone oxime; tert-butanol, ammonia, and catalyst react in the reactor, and the catalyst concentration is 3%. After the reaction, it enters the device. After separation, the clear liquid After entering the product tank, cyclohexanone oxime is obtained through subsequent processes, and then caprolactam is produced; when the catalyst is concentrated to 20%, it returns to the reactor.

[0056] Filtration process:

[0057] The material enters the reaction kettle 100, and under the catalysis of the titanium-silicon molecular sieve catalyst, the cyclohexanone ammoximation reaction is carried out to generate cyclohexanone oxime; a part of the reacted material goes to the catalyst regeneration pipeline from the discharge port at the bottom of the reaction...

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Abstract

The invention discloses a dynamic disc membrane device applied to recycling of an ultrafine solid catalyst and a technology of the device. The dynamic disc membrane device comprises a reaction kettle, a reaction kettle discharging heat exchanger, at least one dynamic disc seperation unit, a back washing tank and a clear liquid tank, wherein the dynamic disc seperation unit comprises a device support, a motor arranged on the device support, a membrane seperation tank arranged on the device support, a clear liquid buffer tank arranged on the membrane seperation tank and a rotating shaft connected with the motor and the membrane seperation tank; a dynamic disc membrane component is arranged in the membrane seperation tank and comprises 1 to 100 dynamic disc membranes; the dynamic disc membrane is a microfiltration or ultrafiltration ceramic disc membrane, the pore diameter of the ceramic disc membrane is 7nm-30mu m, and the diameter of the dynamic disc membrane component is 50-400mm. Microfiltration or ultrafiltration ceramic discs are adopted in the dynamic disc membrane device for cross-flow filtration and have high permeation flux so that the investment cost of the device is reduced while technological processes are shortened, a discharging effect is stale, and the retention rate of the superfine catalyst is above 99%.

Description

technical field [0001] The invention relates to a catalyst recovery device and its technology, in particular to a dynamic disc membrane device and its technology used in the recovery of ultrafine solid catalysts. Background technique [0002] With the continuous development of chemical and petrochemical production industries, the size of catalysts tends to be ultra-fine, and the efficient separation of solid-liquid heterogeneous phases has become extremely difficult. Traditional separation methods such as plate-and-frame filtration and centrifugal separation are difficult to separate products and The catalyst is completely separated, which not only wastes energy consumption, but also has a low utilization rate of the catalyst, and the catalyst content in the obtained product is too high, which affects the quality of the product. The filtration process is often intermittent, which is not conducive to the long-term development of the enterprise from the economic aspect. In ter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/00B01D61/18
Inventor 杨积志李海波邵宋邵黄哲峰
Owner SHANGHAI ANHORN ENVIRONMENTAL TECH CO LTD
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