Furfural purifying apparatus
A furfural refining and equipment technology, applied in the direction of sustainable manufacturing/processing, chemical industry, climate sustainability, etc., can solve the problems of restricting production, high energy consumption of the system, and low refining yield
Active Publication Date: 2016-12-21
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
The whole refining process needs 5-6 towers, the system consumes a lot of energy, and the refining yield is low, which restricts the production
Method used
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[0038] In order to have a further understanding of the technical solution and beneficial effects of the present invention, the technical solution of the present invention and its beneficial effects will be described in detail below with reference to the accompanying drawings.
[0039] figure 1 It is the overall frame schematic diagram of furfural refining equipment of the present invention; figure 1 As shown, the invention provides a kind of furfural refining equipment, comprising:
[0040] Primary fractionation unit S1: used to separate light components, heavy components and middle distillates in furfural raw materials;
[0041] Extraction and separation unit S2: set as extractor 5, connected with the first fractionation rectification unit S1, for extracting the middle distillate, to separate the organic matter and crude furfural in the middle distillate, and recycle the organic matter to the first fractionation rectification unit;
[0042] Refining separation unit S3: conn...
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The invention relates to a furfural purifying apparatus. The apparatus comprises: a primary separation rectification unit used for separating light components, heavy components and a middle fraction in a furfural raw material; an extracting separation unit, wherein the extracting separation unit is an extractor, is connected with the primary separation rectification unit, and is used for extracting the middle fraction to separate organic matters and crude furfural in the middle fraction and recovering the organic matters to the primary separation rectification unit; and a purifying and separating unit connected with the extracting separation unit and used for further removing light components and a small amount of heavy components generated due to heating from the separated crude furfural and collecting final furfural. The furfural purifying apparatus adopts the coupling principle in the chemical engineering process to organically couple removal of the light components, removal of the organic water-soluble substances and product purification in order to form the separation and purification unit, so the purposes of technology simplification, energy saving, consumption reduction and yield increase are reached.
Description
technical field [0001] The invention relates to the technical field of chemical industry, in particular to a furfural refining equipment. Background technique [0002] One-step production of furfural is based on corn cob as raw material, sulfuric acid as catalyst, high pressure (0.6- [0003] 0.8MPa) steam as the carrier, at 160 degrees, hemicellulose is firstly hydrolyzed into xylose, and then the xylose is dehydrated to form furfural, which is vaporized into the steam phase and leaves the reactor. In addition to water vapor and furfural, the gas leaving the reactor also contains by-products produced during the reaction process, such as organic acids, alcohols, ketones, ethers and other light and heavy components. In the past industry, the reaction liquid was firstly rectified in the primary distillation tower to obtain about 90% gross aldehyde, and then the light components were removed from the light fractionation tower in the light removal primary fractionation tower, a...
Claims
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IPC IPC(8): C07D307/48
CPCC07D307/48Y02P20/10
Inventor 郑学明尚会建刘红梅
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY