New Technology Use Corn cob or Rice husk to Making Furfural Produced by Doing

New Technology Use Corn cob or Rice husk to Making Furfural Produced by Doing

Product Description of New Technology Use Corn cob or Rice husk to Making Furfural Produced by Doing

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 New Technology Use Corn cob or Rice husk to Making Furfural Produced by Doing

Continuous rectification process and the traditional process’s economic and technical parameters comparative statement:

More information about furfural

I. The theoretical knowledge of furfural

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

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