Catalyst separation device in furfuryl alcohol producing process and method thereof

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...

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