CN110845459A - Method for extracting maltol from sublimed waste asphalt - Google Patents
Method for extracting maltol from sublimed waste asphalt Download PDFInfo
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- CN110845459A CN110845459A CN201911131282.8A CN201911131282A CN110845459A CN 110845459 A CN110845459 A CN 110845459A CN 201911131282 A CN201911131282 A CN 201911131282A CN 110845459 A CN110845459 A CN 110845459A
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- kettle
- maltol
- waste asphalt
- sublimation
- distillation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D309/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings
- C07D309/34—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
- C07D309/36—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with oxygen atoms directly attached to ring carbon atoms
- C07D309/40—Oxygen atoms attached in positions 3 and 4, e.g. maltol
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Fats And Perfumes (AREA)
Abstract
The invention relates to a method for extracting maltol from sublimed waste asphalt, which comprises the following steps: 1) crushing waste asphalt produced in the production of maltol, firstly adding 1000L-1200L of alcohol into an extraction kettle, then adding 500kg of powdery waste asphalt, stirring and heating to 50-60 ℃, and preserving heat for 1-1.5 hours; 2) filter-pressing the feed liquid in the extraction kettle, and sending the filtrate to a distillation kettle for distillation to recover alcohol in the filtrate; 3) and (3) delivering residual liquid after alcohol recovery to a sublimation kettle, and carrying out sublimation operation to obtain a sublimation material maltol. The invention has the advantages that: 1. the production yield of the maltol is improved, the volume of the treated asphalt is obviously reduced, and the cost for treating the waste asphalt is saved.
Description
The technical field is as follows: the invention relates to a production method of food additive maltol, in particular to a method for extracting maltol from sublimed waste asphalt.
Background art: the production process of maltol is divided into a Grignard working section, a chlorination working section, a sublimation working section, a crystallization working section and a drying working section, the working procedures are longer, and the yield is not high. Especially in the sublimation working section, part of materials in the material sublimation process become waste asphalt due to high-temperature coking, and part of materials in the sublimation later stage are mixed in the waste asphalt and are difficult to sublimate, and finally become solid waste along with the asphalt. The content of maltol in the waste asphalt sample is analyzed to be about 5 percent by taking the waste asphalt sample. In order to further improve the product yield and increase the benefit, the maltol in the waste asphalt needs to be recovered.
Disclosure of Invention
The invention aims to solve the problems of low maltol yield and high solid waste caused by partial maltol contained in asphalt in the prior art, and provides a method for extracting maltol from sublimed waste asphalt.
The technical scheme adopted by the invention is as follows:
a method for extracting maltol from sublimed waste asphalt is characterized by comprising the following steps:
1) crushing waste asphalt produced in the production of maltol, then sieving the crushed waste asphalt by a 18-mesh sieve, firstly adding 1000L-1200L of alcohol into an extraction kettle, then pouring 500kg of the sieved powdery waste asphalt into the extraction kettle, starting stirring, heating the kettle to 50-60 ℃, and preserving heat for 1-1.5 hours;
2) putting the feed liquid in the extraction kettle into a filter press for filter pressing, sending the filtrate into a distillation kettle for distillation, and controlling the temperature of the distillation kettle for distillation to 85 ℃ to recover alcohol in the filtrate;
3) sending residual liquid after recovering alcohol in the distillation kettle to a sublimation kettle, controlling the oil temperature of the sublimation kettle to be 200 ℃ and the vacuum degree to be-0.09 MPa for sublimation operation, and obtaining sublimation material maltol.
The invention has the advantages that:
1. the method can extract nearly 70 tons of maltol products from the waste asphalt by sublimation every year, and has considerable benefit.
2. After the sublimed waste asphalt is crushed, washed and filter-pressed, the state of the asphalt is changed from the original fluffy porous block shape into a nonporous filter cake, the volume of the asphalt is obviously reduced, the occupied field stacking space is reduced, and the using amount of ton bags is reduced; meanwhile, when the delivered waste asphalt is treated, the single-vehicle conveying amount is greatly increased, and the transportation cost is saved.
3. After the maltol in the original sublimed waste asphalt is recycled, the waste asphalt sent out for treatment is incinerated by a solid waste manufacturer, the smoke and smell in the incineration process are obviously reduced, the field environment is improved, and meanwhile, part of environmental protection investment is correspondingly reduced.
Description of the drawings:
FIG. 1 is a flow chart of the present invention.
The specific implementation mode is as follows:
example 1: crushing waste asphalt by a crusher, sieving the crushed waste asphalt by a 18-mesh sieve, adding 1000L of alcohol into an extraction kettle, pouring 500kg of sieved powdery waste asphalt into the extraction kettle, starting stirring, heating the kettle to 60 ℃ by kettle jacket steam, preserving heat for 1 hour, and then putting feed liquid in the kettle into a filter press for filter pressing. 950 liters of filtrate is obtained, 450 kilograms of filter residue cakes are bagged, the filtrate is firstly put into a distillation still for alcohol distillation recovery, the temperature of the distillation still is controlled to be distilled to 85 ℃, 800 liters of recovered alcohol is obtained, 100 liters of residual liquid in the distillation still is sent to a sublimation still, the temperature of the oil in the sublimation still is controlled to be 200 ℃, and the vacuum degree of the sublimation still is controlled to be minus 0.09MPa for sublimation operation, so that 30 kilograms of sublimed materials (namely maltol) are obtained.
Example 2: firstly, waste asphalt is crushed by a crusher and then passes through a 18-mesh screen, 1200L of alcohol is added into an asphalt extraction kettle, 500kg of sieved powdery waste asphalt is poured into the extraction kettle, stirring is started, kettle jacket steam is used for heating the kettle to 50 ℃, heat preservation is carried out for 1.5 hours, and then material liquid in the kettle is put into a filter press for filter pressing. Obtaining 1000 liters of filtrate, bagging 445 kilograms of filter residue cakes, putting the filtrate into a distillation still for alcohol distillation recovery, controlling the temperature of the distillation still for distillation to 85 ℃ to obtain 850 liters of recovered alcohol, conveying 100 liters of residual liquid in the still to a sublimation still, controlling the oil temperature of the sublimation still to be 200 ℃ and the vacuum degree of the sublimation still to be-0.09 MPa for sublimation operation, and obtaining 31 kilograms of sublimate.
Example 3: firstly, waste asphalt is crushed by a crusher and then passes through a 18-mesh screen, 1000L of alcohol is added into an asphalt extraction kettle, 500kg of the sieved powdery waste asphalt is poured into the extraction kettle, stirring is started, kettle jacket steam is used for heating the kettle to 60 ℃, heat preservation is carried out for 1.5 hours, and then material liquid in the kettle is put into a filter press for filter pressing. 800 liters of filtrate is obtained, 450 kilograms of filter cake is bagged, the filtrate is sent to a distillation still for alcohol distillation recovery, the temperature of the distillation still is controlled to be 85 ℃, 700 liters of recovered alcohol is obtained, 100 liters of residual liquid in the distillation still is sent to a sublimation still, the temperature of the oil in the sublimation still is controlled to be 200 ℃, and the vacuum degree of the sublimation still is controlled to be minus 0.09MPa for sublimation operation, so that 31 kilograms of sublimated material is obtained.
As can be seen from the three sets of examples, the malt flour product in the asphalt can be effectively recovered by the method.
Claims (1)
1. A method for extracting maltol from sublimed waste asphalt is characterized by comprising the following steps:
1) crushing waste asphalt produced in the production of maltol, then sieving the crushed waste asphalt by a 18-mesh sieve, firstly adding 1000L-1200L of alcohol into an extraction kettle, then pouring 500kg of the sieved powdery waste asphalt into the extraction kettle, starting stirring, heating the kettle to 50-60 ℃, and preserving heat for 1-1.5 hours;
2) putting the feed liquid in the extraction kettle into a filter press for filter pressing, sending the filtrate into a distillation kettle for distillation, and controlling the temperature of the distillation kettle for distillation to 85 ℃ to recover alcohol in the filtrate;
3) sending residual liquid after recovering alcohol in the distillation kettle to a sublimation kettle, controlling the oil temperature of the sublimation kettle to be 200 ℃ and the vacuum degree to be-0.09 MPa for sublimation operation, and obtaining sublimation material maltol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911131282.8A CN110845459A (en) | 2019-11-19 | 2019-11-19 | Method for extracting maltol from sublimed waste asphalt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911131282.8A CN110845459A (en) | 2019-11-19 | 2019-11-19 | Method for extracting maltol from sublimed waste asphalt |
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| Publication Number | Publication Date |
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| CN110845459A true CN110845459A (en) | 2020-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911131282.8A Pending CN110845459A (en) | 2019-11-19 | 2019-11-19 | Method for extracting maltol from sublimed waste asphalt |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR810000289B1 (en) * | 1977-06-29 | 1981-03-30 | 월리암 지이 맥크레이리 | Process for preparing gamma-pyrone |
| CN108299362A (en) * | 2018-01-13 | 2018-07-20 | 安徽金禾实业股份有限公司 | A method of impurity in separation maltol crude product |
| CN109503536A (en) * | 2018-12-10 | 2019-03-22 | 安徽金禾实业股份有限公司 | A kind of ethylmaltol method of purification and device |
-
2019
- 2019-11-19 CN CN201911131282.8A patent/CN110845459A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR810000289B1 (en) * | 1977-06-29 | 1981-03-30 | 월리암 지이 맥크레이리 | Process for preparing gamma-pyrone |
| CN108299362A (en) * | 2018-01-13 | 2018-07-20 | 安徽金禾实业股份有限公司 | A method of impurity in separation maltol crude product |
| CN109503536A (en) * | 2018-12-10 | 2019-03-22 | 安徽金禾实业股份有限公司 | A kind of ethylmaltol method of purification and device |
Non-Patent Citations (1)
| Title |
|---|
| 李士雨: "乙基麦芽酚精制技术的改进", 《化学工业与工程》 * |
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Application publication date: 20200228 |
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