CN103396385A - Method for extracting furfural from longan pericarps - Google Patents
Method for extracting furfural from longan pericarps Download PDFInfo
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- CN103396385A CN103396385A CN2013103463566A CN201310346356A CN103396385A CN 103396385 A CN103396385 A CN 103396385A CN 2013103463566 A CN2013103463566 A CN 2013103463566A CN 201310346356 A CN201310346356 A CN 201310346356A CN 103396385 A CN103396385 A CN 103396385A
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- furfural
- longan
- pericarps
- solid
- solid acid
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Abstract
The invention discloses a method for extracting furfural from longan pericarps. The method comprises the following steps: 1, putting crushed longan pericarps into a reaction kettle, and adding water according to a solid-liquid mass ratio of 1:8-15; 2, adding SO4<2->-TiO2/clay solid acid having a mass being 5-8% of water, hydrolyzing at an oil bath temperature of 156-160DEG C for 4-5h, and condensing steam generated in the hydrolysis process to obtain a crude furfural solution; and 3, guiding the crude furfural solution into a distillation tower, and separating to obtain highly pure furfural. The method allows furfural having high added values to be extracted from a main raw material longan pericarps, so wastes are changed into valuables, and the resource is fully utilized; and the SO4<2->-TiO2/clay solid acid for catalysis is added in the hydrolysis process, so solid-liquid separation is easy after reaction completion, thereby the production cost is reduced, and the influences to the obtained product and the environment are reduced.
Description
Technical field
The present invention relates to technical field of agricultural product process, be specifically related to a kind of method of extracting furfural from Pericarpium Longan.
Background technology
Furfural (furfural), have another name called furtural, is the important Organic Chemicals of a lot of industries and chemical solvents, with the Chemicals that it directly or indirectly synthesizes, kind more than 1600 arranged, and even also can make some derived product of oil.(formal name used at school: Dimocarpus longan), claim again longan, lichee slave, inferior lichee, swallow ovum, longest-lived can reach more than 400 year to longan; Be all the large precious fruit in south China four with lichee, banana, Fructus Ananadis comosi.Edible and the working position of longan is generally longan aril, and Pericarpium Longan inevitably becomes waste.Be similar to other cellulose family agricultural byproducts, Pericarpium Longan contains abundant furfural.How from Pericarpium Longan, to extract furfural, find no at present relevant report.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method of extracting furfural from Pericarpium Longan, realizes turning waste into wealth, taking full advantage of the purpose of resource.
The present invention is by the following technical solutions:
A kind of method of extracting furfural from Pericarpium Longan, is characterized in that, comprises the following steps:
1) Pericarpium Longan that will pulverize is put into reactor, by the solid-liquid mass ratio of 1:8～15, adds water;
2) add its quality 5%～8% in water
The clay solid acid, under the oil bath temperature of 156～160 ℃, be hydrolyzed 4～5 hours, will obtain thick aldehyde liquid after the vapor condensation in hydrolytic process;
3) thick aldehyde liquid is imported in distillation tower and separates, namely obtain highly purified furfural.
In technique scheme:
In step 1), the granularity of described Pericarpium Longan is preferably 3～5mm;
In step 1), described solid-liquid mass ratio is preferably 1:10.5;
Step 2) in, described
The add-on of clay solid acid is preferably 6.1% of quality;
Step 2) in, the temperature of described hydrolysis is preferably 158 ℃, and the time of hydrolysis is preferably 4.3 hours.
Beneficial effect of the present invention is:
The present invention, take Pericarpium Longan as main raw material, extracts and has the more furfural of high added value from waste, realized turning waste into wealth, taking full advantage of the purpose of resource; In hydrolytic process, add
The clay solid acid carries out catalysis, and after reaction was completed, easily solid-liquid separation, reduced production cost, reduced the impact on product and environment.
Embodiment
Below with embodiment, be further described, but the present invention is not limited to these embodiment.
Embodiment 1
Extract the method for furfural from Pericarpium Longan, step is as follows:
1) Pericarpium Longan of drying being crushed to granularity is 3～5mm, puts into reactor, by the solid-liquid mass ratio of 1:10.5, adds water;
2) add its quality 6.1% in water
The clay solid acid, under the oil bath temperature of 158 ℃, be hydrolyzed 4.3 hours, will obtain thick aldehyde liquid after the vapor condensation in hydrolytic process;
3) thick aldehyde liquid is imported in distillation tower and separates, namely obtain highly purified furfural.
Embodiment 2
1) Pericarpium Longan of drying being crushed to granularity is 3～5mm, puts into reactor, by the solid-liquid mass ratio of 1:8, adds water;
2) add its quality 8% in water
The clay solid acid, under the oil bath temperature of 156 ℃, be hydrolyzed 5 hours, will obtain thick aldehyde liquid after the vapor condensation in hydrolytic process;
3) thick aldehyde liquid is imported in distillation tower and separates, namely obtain highly purified furfural.
Embodiment 3
1) Pericarpium Longan of drying being crushed to granularity is 3～5mm, puts into reactor, by the solid-liquid mass ratio of 1:15, adds water;
2) add its quality 5% in water
The clay solid acid, under the oil bath temperature of 160 ℃, be hydrolyzed 4 hours, will obtain thick aldehyde liquid after the vapor condensation in hydrolytic process;
3) thick aldehyde liquid is imported in distillation tower and separates, namely obtain highly purified furfural.
Claims (5)
1. a method of extracting furfural from Pericarpium Longan, is characterized in that, comprises the following steps:
1) Pericarpium Longan that will pulverize is put into reactor, by the solid-liquid mass ratio of 1:8～15, adds water;
2) add its quality 5%～8% in water
/ clay solid acid, under the oil bath temperature of 156～160 ℃, be hydrolyzed 4～5 hours, will obtain thick aldehyde liquid after the vapor condensation in hydrolytic process;
3) thick aldehyde liquid is imported in distillation tower and separates, namely obtain highly purified furfural.
2. method according to claim 1, it is characterized in that: the granularity of described Pericarpium Longan is 3～5mm.
3. method according to claim 1, it is characterized in that: in step 1), described solid-liquid mass ratio is 1:10.5.
4. method according to claim 1, is characterized in that: described
The add-on of/clay solid acid is 6.1% of quality.
5. method according to claim 1, it is characterized in that: the temperature of described hydrolysis is 158 ℃, the time of hydrolysis is 4.3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103463566A CN103396385A (en) | 2013-08-09 | 2013-08-09 | Method for extracting furfural from longan pericarps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103463566A CN103396385A (en) | 2013-08-09 | 2013-08-09 | Method for extracting furfural from longan pericarps |
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| Publication Number | Publication Date |
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| CN103396385A true CN103396385A (en) | 2013-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103463566A Pending CN103396385A (en) | 2013-08-09 | 2013-08-09 | Method for extracting furfural from longan pericarps |
Country Status (1)
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318945A (en) * | 2008-07-22 | 2008-12-10 | 四川大学 | Method for preparing furfurol with poly-pentose containing waste agronomic crop as raw material |
| CN101486695A (en) * | 2009-02-10 | 2009-07-22 | 清华大学 | Solid acid catalysis and supercritical extraction coupled furfural preparation and apparatus |
-
2013
- 2013-08-09 CN CN2013103463566A patent/CN103396385A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318945A (en) * | 2008-07-22 | 2008-12-10 | 四川大学 | Method for preparing furfurol with poly-pentose containing waste agronomic crop as raw material |
| CN101486695A (en) * | 2009-02-10 | 2009-07-22 | 清华大学 | Solid acid catalysis and supercritical extraction coupled furfural preparation and apparatus |
Non-Patent Citations (4)
| Title |
|---|
| 仇伯望: "制备糠醛的实验与土法生产", 《化学世界》 * |
| 余先纯等: "固体酸水解玉米秸秆制备糠醛的研究", 《林产化学与工业》 * |
| 刘保健等: "糠醛和呋喃的生产、合成进展", 《化工时刊》 * |
| 秦洁华等: "龙眼壳多糖含量的测定及其免疫活性研究", 《西北药学杂志》 * |
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Application publication date: 20131120 |