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Process for producing furfural by bagasse

A technology of bagasse and furfural, which is applied in dryers, drying, organic chemistry, etc., can solve the problems of difficult slag discharge and has not been used in mass production, so as to reduce the trouble of slag removal, shorten the reaction time, and slag discharge smooth effect

Inactive Publication Date: 2010-12-15
山东瑞德生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For furfural manufacturers in my country, due to the constraints of production technology and production equipment, more than 95% of the raw materials are mainly corncobs, such as bagasse, cottonseed hulls, rice husks and other raw materials containing more pentosan, because of the slag discharge during the production process Difficulty and other factors have not been used in mass production

Method used

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  • Process for producing furfural by bagasse
  • Process for producing furfural by bagasse
  • Process for producing furfural by bagasse

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The structure of steaming ball of the present invention is as figure 2 As shown, its structure includes a housing 1 and a rotating device. The two ends of the housing 1 are respectively welded with a shaft head 15. The shaft head 15 is provided with a bearing 3, and the lower part of the bearing 3 is provided with a support 5. , the rotating device is connected to one end of the shaft head 15, and the central holes of the shaft head 15 at both ends are the steam inlet hole 4 and the steam exhaust hole 13 respectively, and the steam inlet hole 4 and the steam exhaust hole 13 communicate with the housing 1 , the housing 1 corresponding to the steam inlet 4 is provided with a steam inlet pan 2 with a steam outlet, and the housing 1 corresponding to the steam outlet 13 is provided with a receiving pan with a steam outlet Steam tray 11, the top of the shell 1 is provided with a charging port 9, the bottom of the shell 1 is provided with a slag discharge port 6, the slag dis...

Embodiment 2

[0024] (1) Bagasse with a water content of 50% (wt / wt) in the sugar industry is sent to a dryer (using the tail gas of a power generation boiler as a heat source to save energy, and the moisture of the bagasse can be recovered simultaneously) for drying to The water content is 30% (wt / wt), then add the dilute sulfuric acid with a concentration of 0.5% (wt / wt) in the bagasse after drying, stir and mix evenly with an acid mixing machine; then the sugarcane after acid mixing slag into the figure 1 The steamed ball shown is hydrolyzed at a steam pressure of 1-1.2Mpa and a steam temperature of 180-190°C for 2 hours (steam is provided by a power boiler, and 16-17 tons of steam is generally used per ton of bagasse) to form an aldehyde vapor stock solution; The mass ratio of bagasse and concentration of 0.5% (wt / wt) dilute sulfuric acid is 1: 0.4;

[0025] (2) Send the aldehyde vapor stock solution obtained in step (1) into the primary distillation tower to steam out most of the wate...

Embodiment 3

[0029](1) Bagasse with a water content of 48% (wt / wt) in the sugar industry is sent to a dryer (utilizing the tail gas of a power generation boiler as a heat source to save energy, and the moisture of the bagasse can be recovered simultaneously) and dried to The water content is 29% (wt / wt), then add the dilute sulfuric acid that concentration is 0.6% (wt / wt) in the dried sugarcane bagasse, stir and mix evenly with the acid mixing machine; Then the sugarcane after the acid mixing slag into the figure 1 The steamed ball shown is hydrolyzed at a steam pressure of 1-1.2Mpa and a steam temperature of 180-190°C for 2 hours (steam is provided by a power boiler, and 16-17 tons of steam is generally used per ton of bagasse) to form an aldehyde vapor stock solution; The mass ratio of bagasse and concentration of 0.6% (wt / wt) dilute sulfuric acid is 1: 0.4;

[0030] (2) Send the aldehyde vapor stock solution obtained in step (1) into the primary distillation tower to steam out most of ...

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Abstract

The invention discloses a process for producing furfural by bagasse, which comprises the following steps of: after drying and stirring acid into bagasse used as a raw material, delivering the bagasse into a spherical boiler for hydrolyzing for two hours so as to form an aldehyde steam stock solution; then delivering the obtained aldehyde steam stock solution into a primary distillation tower for distilling over most of water; after condensing an aldehyde water azeotropy mixture, delivering the aldehyde water azeotropy mixture into an aldehyde separating tank for delaminating; delivering rough furfural into a water scrubber for washing most acetic acid and methanol out of the rough furfural; and then refining in a rectifying tower to obtain finished product furfural; processing wastewater separated by the water scrubber by using a light component removing tower for recycling methanol; and after separating aldehyde steam in the furfural residues separated by the spherical boiler through a furfural residue steam-residue separator, adding cellulase into the furfural residues for fermenting to obtain acetone and butanol. The furfural is extracted from bagasse left after sugar production, and the cellulose left after furfural production is added into the furfural residues for fermenting to obtain the acetone and the butanol, thereby achieving the aims of clean co-production and comprehensive utilization. By adopting the self-made spherical boiler instead of the traditional hydrolysis kettle, the invention solves the problem of difficult residue discharge.

Description

technical field [0001] The invention relates to a method for producing furfural, in particular to a production process for producing furfural using bagasse as a raw material. Background technique [0002] Furfural, also known as furan formaldehyde, is one of the main raw materials in the organic synthetic chemical industry. It has a wide range of uses and can be used to make synthetic resins. It can produce a large number of derivatives through hydrogenation, oxidation, condensation and other reactions. It is also an excellent solvent, which can be used for refining petroleum, refining lubricating oil, refining oil and dissolving nitrocellulose, etc. It is also a raw material and reagent for pharmaceuticals and various organic synthesis. It is an important basic organic chemical raw material. The world's furfural production capacity is about 500,000 tons / a, and my country's output is 350,000 tons / a. And it is increasing at an annual rate of 10%, which is far from meeting m...

Claims

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Application Information

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IPC IPC(8): C07D307/50C12P7/28C12P7/16F26B21/14
Inventor 柏绪桐杨念强
Owner 山东瑞德生物科技有限公司
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