Home > Products > Furfural Equipment > Use Corn cob or Rice husk to Making Furfural Produced by Doing/furfural plant
Use Corn cob or Rice husk to Making Furfural Produced by Doing/furfural plant
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Product Details
Product Type: | Other, furfural | Place of Origin: | Henan, China | Brand Name: | DOING, DOING |
Model Number: | DY-F | After-sales Service Provided: | Engineers available to service machinery overseas |
Product Description
Use Corn cob or Rice husk to Making Furfural Produced by Doin/ furfural plant
Product Description of Use Corn cob or Rice husk to Making Furfural Produced by Doing/ furfural plant
The furfural was discovered by Derbynier, a German chemist, in 1832.At that time, when produced formic acidby using mixed liquor of sulfuric acid and manganese dioxide and sucrose, a kind of by-product which was called“Artificial Formic Acid oil” was produced, too. Later, there was someone who got this kind of oil from rice bran in
1845, and then it was called “Furfural” generally.
Working Process of Use Corn cob or Rice husk to Making Furfural Produced by Doing/ furfural plant
Continuous rectification process and the traditional process’s economic and technical parameters comparative statement:
Process name Item | Alkali Neutralize acid and intermittent rectification process | Alkali Neutralize acid and continuous rectification process | continuous deacidification and dehydration and continuous rectification process |
Production control | intermittent control for each batch and frequently alternate operation | intermittent neutralization for each batch andcontinuous rectification operation | strong process continuity and easy control operation |
Production capacity | general production capacity | general production capacity | strong adaptability |
Operator capacity | 3 shifts × 25 = 75 | 3shifts x24=72 | 3shifts x17=51 |
side-reaction of alkali neutralization | It will cause a series of side reaction, having a certain influence on product quality and refined rate | It will cause a series of side reaction, having a certain influence on product quality and refined rate | Remove the process of using alkali to neutralize acid Process, there is no occurrence of side reaction |
product purity | ≥98.5% | ≥98.5% | ≥99.0% |
Refining yield | coarse aldehyde content≥90%, Yield≥85% | coarse aldehyde content≥90% Yield≥84.5% | coarse aldehyde content≥90%, Yield≥86.5% |
Equipment investment | normal investment | normal investment | Investment of increasing self-control and continuous rectification equipment is 0.5 million |
Aldehyde mud processing (i.e. the high boiling point material) | The waste discharged after aldehyde mud washing has impact on the environment, which will raise governance cost | It will be directly send to the user without refining the furfural | Redistillation of high boiling material can get 50% of aldehydes ,the residue after distillation will go through boiler combustion |
Corn cob consumption (made in Hebei,Shandong and Henan province) | Producing a ton finished furfural consumes 8.5t dry basis corn cob | Producing a ton finished furfural consumes 8.7t dry basis corn cob | Producing a ton finished furfural consumes less than 8t dry basis corn cob |
More information about furfural/ furfural plant
I. The theoretical knowledge of furfural/ furfural plant
1. Summary
Furfural also can be called furan formaldehyde,( -furan formaldehyde)
Structural formula:
Molecular formula: (Molecular formula:C5H4O2;Structural formula:C4H3O.CHO )
Molecular weight :96.08
2. The main physical constant
density:( n20)1.1598 g/cm3
refractive index:(n20D)1.524
boiling point:(101.325 KPa ) 161.7℃
specific gravity:(d20)1.1598
freezing point:- 36.5℃
autoignition temperature(ignition point):315℃
flashing point: 60℃
lower explosive:2.1%
upper explosive limit:19.3%
II. Chemistry of Furfural production
(C5H8O4) n +nH2O n(C5H10O5) n(C5H4O2)
Poly pentose pentose furfural
1. Flow chart of furfural plant
2. Description of the process:
To crush raw material(corncob) into 15-18mm particles -->To deliver those particles by the elevator into the feeder--> To uniformly mix them with 5% dilute sulfuric acid--> To put them into the hydrolysis reactor--> To hydrolyze them by introducing steam with 0.8-0.9MPa pressure (temperature 170 ℃, hydrolysis time 3.5h)-->To condense furfural gas into 80-90 ℃ liquid-->To flow them into the crude distillation (continuously, normal pressure) with maintaining the bottom temperature of 103-106 ℃and the top temperature 98-100 ℃ -->To condense the gas in the crude distillation into 50-60 ℃liquid by branch-furfural condenser into branch furfural tank--> To neutralize the raw furfural with a small amount of soda ash-->To flow into distillation (intermittently, negative pressure -0.08MPa)-->To get furfural (content> 99%)-->To separately flow aqueous furfural (furfural content 11%) back into the crude distillation .
III.Furfural international standard
Industrial furfural technical requirements GB1926.1-2009
Item | Premium grade | First grade | Second grade |
Appearance | light yellow to amber transparency liquid, no suspended solids and mechanical impurities | ||
Density(p20)/(g/cm3) | 1.158—1.161 | ||
Refractive index(n20D) | 1.524—1.527 | ||
Moisture/% ≤ | 0.05 | 0.10 | 0.20 |
Acidity/(mol/L) ≤ | 0.008 | 0.016 | 0.016 |
Furfural content /% ≥ | 99.0 | 98.5 | 98.5 |
Initial boiling point /℃ ≥ | 155 | 150 | — |
Fraction before 158℃ 158℃/%≤ | 2 | — | — |
Total distillation /% ≥ | 99.0 | 98.5 | — |
Final boiling point /℃ ≤ | 170 | 170 | — |
Residue/% ≤ | 1.0 | — | — |
Contact Us
- Henan Doing Mechanical Equipment Co., Ltd.
- Contact nameSOPHIA ZANG
- Phone0086-371-56771823
- AddressZhengbian Road Zhengzhou City Zhengzhou,Henan
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