Method and apparatus for purification of furfuryl alcohol
A refining method and refining device technology, applied in organic chemistry and other directions, can solve the problems of high power energy consumption, low product recovery rate, long operation interval, etc., and achieve the effects of reducing steam consumption, fast circulation speed, and improving productivity
Active Publication Date: 2009-10-21
JINAN SHENGQUAN GRP SHARE HLDG CO LTD
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Problems solved by technology
This intermittent distillation process has defects such as small distillation volume of a single set of equipment, low recovery rate of finished products, frequent maintenance, and long operation intervals.
In the process of producing furfuryl alcohol by catalytic hydrogenation of furfural in Rhone Poulenc Company of France, the refining of furfuryl alcohol adopts the "four towers" process (see "Modern Chemical Industry" No. 2, 1990, titled "Progress in Production Technology of Furfuryl Alcohol"), the so-called "four towers" That is, light component removal tower, furfural removal tower, refining tower and heavy component removal tower. Although this process can produce relatively pure furfuryl alcohol, it is also a batch production process. In addition to the above-mentioned shortcomings of the batch process, there are also Disadvantages of large equipment investment and high energy consumption such as steam and electricity
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[0037] figure 1 It is the device schematic diagram of the crude product furfuryl alcohol refining process of the present invention, comprises dehydration tower 1, rectifying still 2 and the stilling still 3 that is used to handle high boiler, is connected by the sealed pipeline that has valve 107,209 between them, Wherein, the dehydration tower 1 is a plate dehydration tower 1 of an externally heated evaporator, see figure 2 , which includes an external evaporator 102 for heating crude furfuryl alcohol and a tray tower for removing water and light components. Because its structure is a prior art, it will not be described in detail here. In the plate dehydration tower 1 of the externally heated evaporator, the crude furfuryl alcohol is dehydrated and light components are removed. The rectification kettle 2 is used to remove impurities with a higher boiling point than furfuryl alcohol to obtain the finished product of furfuryl alcohol. The distillation kettle 3 is used for rect...
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The present invention fine purification technique of crude product furfuryl alcohol and device thereof, wherein water and light component of crude product furfuryl alcohol is removed in dehydration tower, then completed product of furfuryl alcohol is prepared by distilling in rectifying still, last of all furfuryl alcohol crude product which is deposited inrectifying still and contain deposited matter and high-boiling product is transported to another distilling still to inline process, completed product of furfuryl alcohol is separated out and collected, and the residue is discharged. The present invention is characterized in that said 3 steps process is continuous distillation technique, which resolve the present problem of small distillation output of single unit equipment, low completed product recovery rate, large equipment investment, frequent maintenance and long operation interval act existed in discontinuous way distillation technique used for fine purification of furfuryl alcohol crude product.Use of above rectifying still and distilling still used for processing high-boiling product also resolve the problem, which heating pipe of evaporator is easily scaled in the existent technology.
Description
technical field [0001] The invention relates to a crude furfuryl alcohol refining process and a device thereof, in particular to a crude furfuryl alcohol refining process and a device thereof when furfural is catalytically hydrogenated to prepare furfuryl alcohol. Background technique [0002] Furfuryl alcohol, also known as furan methanol, is the product of catalytic hydrogenation of furfural. It is mainly used in adhesives, anti-corrosion coatings, thinners and modifiers of synthetic resins in the mechanism casting industry, and raw materials in industries such as synthetic rubber and pesticides. The production of furfuryl alcohol has long been industrialized, and the process of producing crude furfuryl alcohol by catalytic hydrogenation of furfural is a continuous production process. However, at present, the domestic distillation and purification of crude furfuryl alcohol still generally adopts a batch-type production process, that is, in a distillation still Feeding fir...
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IPC IPC(8): C07D307/44
Inventor 唐一林唐峰江成真柴惠新焦丽栗昭争
Owner JINAN SHENGQUAN GRP SHARE HLDG CO LTD