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Catalyst separation device in furfuryl alcohol producing process and method thereof

A production process and separation device technology, applied in the direction of organic chemistry, can solve the problems of affecting furfuryl alcohol production, long time, waste of resources, etc., achieve the effects of reducing cost and energy consumption, improving product recovery rate, and avoiding blockage of pipelines

Inactive Publication Date: 2012-12-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition to the influence of the above-mentioned catalyst on subsequent distillation operations and the environment, this method also has other disadvantages: the time required for natural settlement is relatively long; at the same time, the appearance of the lower layer of waste residue produced by precipitation is solid block, containing 48% -50% organic matter, which affects the production of furfuryl alcohol and wastes resources

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  • Catalyst separation device in furfuryl alcohol producing process and method thereof

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Experimental program
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Effect test

Embodiment 1

[0023] A catalyst separation device and method in a furfuryl alcohol production process, characterized in that it comprises the following devices and steps:

[0024] The furfuryl alcohol crude product contains the silicone catalyst of 1% (wt) in storage tank 1, and catalyst density is 2.6kg / m 3 , the average particle diameter is 4 μ m, in the production process, open the valve 101 that connects the furfuryl alcohol crude product storage tank 1 and the disc sedimentation centrifuge 2, the crude alcohol in the storage tank 1 enters the sedimentation centrifuge 2 continuously, and the centrifuge separation factor is 6100, After centrifugal separation, the catalyst removal rate can reach more than 95%. Clear liquid enters distillation tower 3 through outlet 201 and is refined, and the volume percent content of liquid in the gained liquid slag is 50%, adopts continuous slag discharge mode to be discharged into liquid slag recovery tank 4 through outlet 202; When the liquid stored i...

Embodiment 2

[0026] The furfuryl alcohol crude product contains the chromium ketone catalyst of 0.7% (wt) in storage tank 1, and catalyst density is 4.49kg / m 3 , with an average particle size of 3 μm. In the production process, open the valve 101 connecting the furfuryl alcohol crude product storage tank 1 and the disc sedimentation centrifuge 2, the crude alcohol in the storage tank 1 enters the sedimentation centrifuge 2 continuously, and the separation factor of the centrifuge is 8300. After centrifugation, the catalyst The removal rate can reach more than 95%. Clear liquid enters distillation tower 3 through outlet 201 and is refined, and the volume percent content of liquid in the gained liquid slag is 40%, adopts continuous slag discharge mode to be discharged into liquid slag recovery tank 4 through outlet 202; When the liquid stored in recovery tank 4 Slag up to 10m 3 When the volume of the recovery tank is 2 / 3, open the valve 401 between the recovery tank 4 and the slag pump 5, ...

Embodiment 3

[0028] The furfuryl alcohol crude product contains the chromium ketone catalyst of 2% (wt) in storage tank 1, and catalyst density is 4.49kg / m 3 , with an average particle size of 3 μm. In the production process, open the valve 101 connecting the furfuryl alcohol crude product storage tank 1 and the disc sedimentation centrifuge 2, the crude alcohol in the storage tank 1 enters the sedimentation centrifuge 2 continuously, and the separation factor of the centrifuge is 5500. After centrifugation, the catalyst The removal rate can reach more than 95%. Clear liquid enters distillation tower 3 through outlet 201 and is refined, and the volume percent content of liquid in the gained liquid slag is 50%, adopts continuous slag discharge mode to be discharged into liquid slag recovery tank 4 through outlet 202; When the liquid stored in recovery tank 4 Slag up to 10m 3 When the volume of the recovery tank is 2 / 3, open the valve 401 between the recovery tank 4 and the slag pump 5, an...

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Abstract

The invention relates to a catalyst separating device and a method in the furfuryl alcohol production. The device comprises a furfuryl alcohol coarse product storage tank, a disk settling centrifuge, and a three-column filter centrifuge, wherein the furfuryl alcohol coarse product storage tank, the disk settling centrifuge, a recovery tank, a pulp pump and the three-column filter centrifuge sequentially connected through a pipe, and an clear liquid outlet of the disk settling centrifuge is connected to a distillation tower; and a residue liquid outlet of the disk settling centrifuge is connected to the recovery tank. A liquid outlet of the three-column filter centrifuge is connected to the furfuryl alcohol coarse product storage tank. The method includes (1) separating catalyst-carried furfuryl alcohol coarse product through the disk settling centrifuge, and allowing clear liquid to flow into the distillation tower; (2) separating the residue liquid in the three-column filter centrifuge, and discharging the filter residue; and (3) refluxing the filtrate into the furfuryl alcohol coarse product tank, and separating in the disk settling centrifuge again. Compared with the conventional method, the inventive method has high removal rate for removing catalyst from furfuryl alcohol coarse product (increased by about 30-60%), reduced catalyst content in distillation drainage, reduced environment pollution, shortened process route and reduced energy consumption.

Description

technical field [0001] The invention relates to the technical field of furfural preparation, in particular to a catalyst separation device and method in the furfuryl alcohol production process. Background technique [0002] Furfuryl alcohol, also known as furan methanol, is an important chemical raw material. It is an important raw material solution for the production of furan and anti-corrosion resins, an excellent organic solvent, and can also be used in synthetic rubber, pesticides and as rocket fuel. The main method of industrially producing furfuryl alcohol is the catalytic hydrogenation of furfural. The furfural catalytic hydrogenation process is generally carried out under high pressure and high temperature conditions. After a large tank sedimentation or simple centrifugal filtration to remove part of the catalyst, most of the catalyst enters the distillation unit together with the hydrogenation product. The presence of the catalyst prolongs the operation of the subs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/44
Inventor 谭蔚杨小刚
Owner TIANJIN UNIV
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