CN1189492A - Method for prodn. of furol from cornob - Google Patents
Method for prodn. of furol from cornob Download PDFInfo
- Publication number
- CN1189492A CN1189492A CN97105060A CN97105060A CN1189492A CN 1189492 A CN1189492 A CN 1189492A CN 97105060 A CN97105060 A CN 97105060A CN 97105060 A CN97105060 A CN 97105060A CN 1189492 A CN1189492 A CN 1189492A
- Authority
- CN
- China
- Prior art keywords
- acid solution
- hydrolysis
- reaction
- hydrolysis reaction
- aldehyde
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A process for preparing furfurol with maize cob features that the catalyst's diluent acid solution is mixed with raw material, first-immersion-then extrusion method is used to make catalyst come into material uniformly while to control the acid ratio of material in allowable range, a rotary ball-type apparatus is used for hydrolysis reaction while stirring the materials, and gas inlet and outlet mechanism designed specially can discharge aldehyde gas in time for uniform reaction. Its advantages are short reaction time, less by-products, less aldehyde loss and high hydrolysis efficiency.
Description
The present invention relates to a kind of by suitable catalyzer, make fibrous materials such as corn cob produce the method for furfural by system's hydrolysis of forming by suitable equipment, furfural is widely used industrial chemicals, can produce resin, agricultural chemicals and be used for rosin, lube oil finishing etc.
The objective of the invention is to realize a kind of method of producing furfural with the corn cob for the raw material hydrolysis, this method and original manufacture method ratio have higher efficient, lower energy consumption,
Furfural is to use the vegetation waste material, through the boiling hydrolysis, contained pentosan changes generation wood sugar (pentose) and makes through thermal dehydration, generates in the reaction process of wood sugar in hydrolysis, needs to add suitable sulfuric acid as catalyzer, traditional production method: air-dry corn cob after crushed, by a certain percentage, the acid mixing device by band stirs is sprayed on the material surface with acid solution, enter vertical hydrolyzer then, carry out the boiling hydrolysis.
The problem that conventional production methods exists: acid solution only is attached to the surface of material, and the mixing of material and acid solution is inhomogeneous, and hydrolysis time is longer, thereby makes reaction by product ratio height, and the hydrolysis yield is low, and energy consumption is also bigger.
The present invention adopts new acid solution adding method and novel hydrolysis device, to overcome the shortcoming of conventional production methods.
In the present invention, the raw material corn cob, after pulverizer is pulverized, enter continuous pickling device, the acid solution that recycles, through nozzle, spray to the material that enters the pickling device, material constantly moves down under by the feed appliance effect that roller is formed, after vertical stock column enters pickling device U type bottom, beginning is risen under the acid solution buoyancy, breaks away from the diluted acid liquid level, enters squeezing machine after the preliminary hydro-extraction, material is leveled with a roller in the squeezing machines by twice roll extrusion three, the acid solution part on material surface is forced to clamp-on hard xylem, and a part breaks away from material, and the material acid that makes material is than reaching 1: (0.5-0.6) material enters hydrolysis kettle with the material that acid solution has reached after sufficient contact is squeezed.
Hydrolysis kettle is ball-type and rotatable reactor among the present invention, this still with certain rotating speed around horizontal rotational shaft, steam is entered by transverse axis one end, enter the bed of material by dendritic sparger from the bottom of the bed of material, the steam inducing tube device of aldehyde vapour particular design in still, discharge reactor through transverse axis again, steam inducing tube is in the vapor phase space of widely different material top of changeing all the time, and the vacuum noz(zle) of special construction can stop powder to be discharged with aldehyde vapour.
In the hydrolytic reaction pot rotary course, advance the steam discharge pipe fitting in material and the still and produce relative movement, thereby material has been played the effect of turning.
Hydrolysis kettle among the present invention, can reach following purpose in hydrolysis reaction: 1. material is turned repeatedly, make and react in the bed of material evenly, reduce the ratio of unreacted material in the material, improve furaldehyde yield, 2. make steam pass through the bed of material equably, in time take away the aldehyde vapour that reaction generates, reduce aldehyde vapour and in pot, stops and cause resinifying loss, 3. owing to material in the reaction process is subjected to continuous friction, constantly peel off on the top layer, has reduced the aldehyde vapour that late phase reaction generates, owing to contacting the oxidation that the acid material in top layer causes, the resinifying loss, 4. strengthened hydrolytic process, under the 6ba operating pressure, hydrolysis time can taper to 3 hours by 6 hours in the past, the water capacity that makes hydrolytic residue is by 300%/air-dry material, drop to about 200%/air-dry material, residue contains aldehyde loss and reduces approximately 30%, and the hydrolysis yield improves 1-2%.
System representation of the present invention in the accompanying drawings, wherein, 1 is pulverizer, 2 is that lift 3 is the pickling device, 4 is three roller squeezing machines, 5 is temporary tank, 6 is hydrolysis kettle.
Claims (3)
1. production method of producing furfural with corn cob.The feature of this method: catalyst acid solution is to be flooded by acid solution earlier by material with mixing of material, realizes through pushing again.Hydrolysis reaction then is to carry out under the condition that material is forced to turn.
2. in the method for claim 1, acid solution is to finish in a U type equipment to the dipping of material, by the feed appliance that roller is formed material is pressed to the acid solution body, after the material process equipment lower-most point, rises to discharge port under the acid solution buoyancy.
3. in the method for claim 1, hydrolysis reaction is to carry out steam inlet pipe to become dendritic in screw formula reactor, and static downwards, steam discharge pipe is drawn vapour through axis by top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97105060A CN1189492A (en) | 1997-01-29 | 1997-01-29 | Method for prodn. of furol from cornob |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97105060A CN1189492A (en) | 1997-01-29 | 1997-01-29 | Method for prodn. of furol from cornob |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1189492A true CN1189492A (en) | 1998-08-05 |
Family
ID=5167621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97105060A Pending CN1189492A (en) | 1997-01-29 | 1997-01-29 | Method for prodn. of furol from cornob |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1189492A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300127C (en) * | 2004-09-27 | 2007-02-14 | 王�义 | Process and device for producing furol by two step continuous low pressure high temperature dynamic hydrolysis method |
| CN1319960C (en) * | 2005-09-26 | 2007-06-06 | 天津大学 | Method for making furfuraldehyde using xylose mother liquor as material |
| CN101130531B (en) * | 2007-09-17 | 2012-05-09 | 济南圣泉集团股份有限公司 | System and method for preparing furfural from agricultural and forestry waste |
| CN102757413A (en) * | 2011-04-27 | 2012-10-31 | 中国科学院过程工程研究所 | Method for preparing furfural by taking corncob as raw material |
| CN109019031A (en) * | 2018-08-17 | 2018-12-18 | 滦县滦兴生物科技有限公司 | Corncob air-transport system |
| CN110372644A (en) * | 2019-08-29 | 2019-10-25 | 山东省化工研究院 | The nitration mixture method of deoxidation and equipment of biomass material in a kind of furfural production |
-
1997
- 1997-01-29 CN CN97105060A patent/CN1189492A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300127C (en) * | 2004-09-27 | 2007-02-14 | 王�义 | Process and device for producing furol by two step continuous low pressure high temperature dynamic hydrolysis method |
| CN1319960C (en) * | 2005-09-26 | 2007-06-06 | 天津大学 | Method for making furfuraldehyde using xylose mother liquor as material |
| CN101130531B (en) * | 2007-09-17 | 2012-05-09 | 济南圣泉集团股份有限公司 | System and method for preparing furfural from agricultural and forestry waste |
| CN102757413A (en) * | 2011-04-27 | 2012-10-31 | 中国科学院过程工程研究所 | Method for preparing furfural by taking corncob as raw material |
| CN102757413B (en) * | 2011-04-27 | 2014-07-30 | 中国科学院过程工程研究所 | Method for preparing furfural by taking corncob as raw material |
| CN109019031A (en) * | 2018-08-17 | 2018-12-18 | 滦县滦兴生物科技有限公司 | Corncob air-transport system |
| CN110372644A (en) * | 2019-08-29 | 2019-10-25 | 山东省化工研究院 | The nitration mixture method of deoxidation and equipment of biomass material in a kind of furfural production |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021196384A1 (en) | Reaction enhancement system and process for producing pta by px having built-in micro-interface unit | |
| CN1189492A (en) | Method for prodn. of furol from cornob | |
| CN111848557A (en) | Preparation process of furfural | |
| CN205603586U (en) | Crop straw enzymolysis tank | |
| CN104388194B (en) | A kind of grease hydrolysis reactor and reaction process | |
| CN101130532B (en) | System and method for producing furol by using agricultural and forestry castoff | |
| CN107913660B (en) | Unsaturated polyester resin production facility | |
| CN110343035B (en) | Method for preparing natural benzaldehyde by spraying continuous hydrolysis | |
| CN204470272U (en) | For changing food waste heating hydrolysis equipment | |
| CN217887963U (en) | Hydrolysis reaction device for lactic acid oligomer cracking cyclization substrate | |
| CN213557031U (en) | Reaction kettle device for processing polycarboxylate superplasticizer | |
| CN114225882B (en) | Reaction kettle, polyether polyol preparation system and preparation method | |
| CN109603907A (en) | Cation resin catalyzing agent, preparation method and its catalytic applications that glycolic is prepared in methyl glycollate Hydrolyze method | |
| CN114130331A (en) | Reaction kettle structure with high stirring efficiency for solid phase carboxylation | |
| CN101337864A (en) | Method for preparing ethylene glycol mono-n-butyl ether by continuous pipe reaction | |
| CN212548349U (en) | Vacuum rotary evaporation kettle for purifying high-viscosity ionic liquid | |
| CN211586526U (en) | Hydrogenation reaction device for acetyl n-propanol | |
| CN1616443A (en) | Process and device for producing furol by two step continuous low pressure high temperature dynamic hydrolysis method | |
| CN104557810A (en) | Method for producing furfuraldehyde from pentose solution by adopting impinging stream reactor | |
| CN204685098U (en) | A kind of process units for DOTP | |
| CN102167353B (en) | Reaction device with internal material returning function for recycling ammonia by dry method | |
| CN109232252B (en) | Process for continuously producing methyl ricinoleate | |
| CN112221459A (en) | Polyether neutralization reactor | |
| CN106179133B (en) | A kind of rotary packed bed reactor of improved enzymatic and its application in fatty acid is prepared in enzymatic grease hydrolysis | |
| CN114471434B (en) | Hydrolysis reaction device for cleavage cyclization substrate of lactic acid oligomer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |