CN115475400A - Method for removing polycyclic aromatic hydrocarbon in tea oil by molecular distillation - Google Patents
Method for removing polycyclic aromatic hydrocarbon in tea oil by molecular distillation Download PDFInfo
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- CN115475400A CN115475400A CN202211205463.2A CN202211205463A CN115475400A CN 115475400 A CN115475400 A CN 115475400A CN 202211205463 A CN202211205463 A CN 202211205463A CN 115475400 A CN115475400 A CN 115475400A
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- Prior art keywords
- tea oil
- polycyclic aromatic
- molecular distillation
- distillation
- aromatic hydrocarbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/12—Molecular distillation
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/12—Refining fats or fatty oils by distillation
Abstract
The invention discloses a method for removing polycyclic aromatic hydrocarbon in tea oil by molecular distillation, which comprises the following steps: pouring the treated tea oil into a molecular distillation device for distillation, removing light component substances, and collecting the residue after light component removal. Compared with the traditional preparation method, the method has short heating time, only ten seconds, and the active ingredients in the tea oil are not damaged due to long-time high-temperature heating; the process is simple and only one step.
Description
Technical Field
The invention relates to the technical field of tea oil production, in particular to a method for removing polycyclic aromatic hydrocarbons in tea oil by molecular distillation.
Background
Polycyclic aromatic hydrocarbons are a kind of carcinogen in chemical environment, and are three kinds of refractory (carcinogenic, teratogenic and mutagenic) toxic and harmful compounds. At present, the polycyclic aromatic hydrocarbon removal method mainly comprises a liquid-liquid extraction method, an adsorption method, a chromatography method and the like. Polycyclic aromatic hydrocarbons can remain in the tea oil due to various reasons such as airing, steaming and frying and the like, and the national safety standard is within 10 mug/kg. Therefore, the polycyclic aromatic hydrocarbons in the tea oil must be removed by a method.
The existing process for removing polycyclic aromatic hydrocarbon in tea oil is complex, the operation is more complicated, and the removal efficiency is low.
Disclosure of Invention
The invention aims to provide a method for removing polycyclic aromatic hydrocarbon in tea oil by molecular distillation.
In order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows:
the method for removing polycyclic aromatic hydrocarbon in tea oil by molecular distillation comprises the following steps:
step one, pouring the treated tea oil into a molecular distillation device for distillation, removing light component substances, and collecting the residue after light component removal, namely the tea oil after polycyclic aromatic hydrocarbon removal.
Further, in the second step, the distillation pressure of the molecular distillation is 250Pa, the distillation temperature is 200 ℃, the feeding rate of the device is 15mL/min, and the rotating speed of the knifing is 200r/min.
Further, the light component substances in the second step include chrysene, benzo [ a ] anthracene, benzo [ b ] fluoranthene, benzo [ k ] fluoranthene, benzopyrene, benzoperylene, dibenzo (a, h) anthracene, indeno (1, 2, 3-cd) pyrene and free fatty acid.
Compared with the prior art, the invention has the advantages that:
(1) The molecular distillation technology has high separation efficiency; (2) The heating time is short, only ten seconds, and the active ingredients in the tea oil are not damaged due to long-time high-temperature heating; (3) the process is simple and only one step is needed; (4) The operation condition is easy to control, and the polycyclic aromatic hydrocarbon removal process can be adjusted by changing parameters such as distillation temperature, distillation pressure, feeding rate, scraper rotating speed and the like; (5) Can remove free fatty acid in the tea oil while removing polycyclic aromatic hydrocarbon, namely deacidify.
Drawings
FIG. 1 is a liquid chromatogram of a benzopyrene control;
FIG. 2 is a liquid chromatogram for measuring benzopyrene in tea oil.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined purpose, the following detailed description of the method for removing polycyclic aromatic hydrocarbons from tea oil by molecular distillation according to the present invention is provided with the accompanying drawings and preferred examples, as follows:
as shown in figures 1 and 2, tea oil containing polycyclic aromatic hydrocarbon is added into a feeder of a molecular distillation device, a rotary vane pump and a diffusion pump are sequentially opened to enable the vacuum degree of a vacuum system to reach 250Pa, a heater is opened to set distillation temperature of 200 ℃, the feeding rate of the device is adjusted to be 15mL/min and the film scraping rotation speed is adjusted to be 200r/min, and the tea oil is subjected to molecular distillation. And (4) collecting heavy components to obtain the tea oil without polycyclic aromatic hydrocarbon. Gas chromatography detection shows that the polycyclic aromatic hydrocarbon in the treated tea oil is 1.2 mu g/kg.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and any simple modification, equivalent change and modification made by those skilled in the art according to the technical spirit of the present invention are still within the technical scope of the present invention without departing from the technical scope of the present invention.
Claims (3)
1. The method for removing polycyclic aromatic hydrocarbon in tea oil by molecular distillation is characterized by comprising the following steps: the method comprises the following steps:
step one, pouring the treated tea oil into a molecular distillation device for distillation, removing light component substances, and collecting the residue after light component removal, namely the tea oil after polycyclic aromatic hydrocarbon removal.
2. The method for removing polycyclic aromatic hydrocarbons in tea oil by molecular distillation as claimed in claim 1, wherein: and in the second step, the distillation pressure of molecular distillation is 250Pa, the distillation temperature is 200 ℃, the feeding rate of equipment is 15mL/min, and the rotating speed of a wiped film is 200r/min.
3. The method for removing polycyclic aromatic hydrocarbons in tea oil by molecular distillation as claimed in claim 1, wherein: the light component substances in the second step include chrysene, benzo [ a ] anthracene, benzo [ b ] fluoranthene, benzo [ k ] fluoranthene, benzopyrene, benzoperylene, dibenzo (a, h) anthracene, indeno (1, 2, 3-cd) pyrene, and free fatty acids.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211205463.2A CN115475400A (en) | 2022-09-30 | 2022-09-30 | Method for removing polycyclic aromatic hydrocarbon in tea oil by molecular distillation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211205463.2A CN115475400A (en) | 2022-09-30 | 2022-09-30 | Method for removing polycyclic aromatic hydrocarbon in tea oil by molecular distillation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115475400A true CN115475400A (en) | 2022-12-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202211205463.2A Pending CN115475400A (en) | 2022-09-30 | 2022-09-30 | Method for removing polycyclic aromatic hydrocarbon in tea oil by molecular distillation |
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| CN (1) | CN115475400A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102160581A (en) * | 2011-03-17 | 2011-08-24 | 湖南山润油茶科技发展有限公司 | Process method for quickly removing benzopyrene and other harmful substances in tea oil |
| CN102640805A (en) * | 2011-02-18 | 2012-08-22 | 周大捷 | Method for deodorization, deacidification, and benzopyrene removal of edible vegetable oil |
| US8258330B1 (en) * | 2012-01-04 | 2012-09-04 | Naturalis, S.A. | Carrier fluid composition comprising fatty acids ethyl esters and process for reducing the concentration of persistent organic pollutants in fish oil |
| CN107488503A (en) * | 2017-08-26 | 2017-12-19 | 中山大学惠州研究院 | A kind of method using the pure physical refining camellia seed oil of three-level molecular clock |
| CN107828507A (en) * | 2017-11-01 | 2018-03-23 | 广州市浩立生物科技有限公司 | A kind of camellia seed oil refinement method and equipment |
| CN110642826A (en) * | 2019-09-05 | 2020-01-03 | 江西省科学院应用化学研究所 | Method for extracting vitamin E from tea oil deodorized distillate by using molecular distillation technology |
| CN110760385A (en) * | 2019-11-15 | 2020-02-07 | 湖南省康多利油脂有限公司 | Method for removing benzopyrene in tea oil |
| CN112159706A (en) * | 2020-10-12 | 2021-01-01 | 贵州航天乌江机电设备有限责任公司 | Efficient perilla seed oil preparation process |
-
2022
- 2022-09-30 CN CN202211205463.2A patent/CN115475400A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102640805A (en) * | 2011-02-18 | 2012-08-22 | 周大捷 | Method for deodorization, deacidification, and benzopyrene removal of edible vegetable oil |
| CN102160581A (en) * | 2011-03-17 | 2011-08-24 | 湖南山润油茶科技发展有限公司 | Process method for quickly removing benzopyrene and other harmful substances in tea oil |
| US8258330B1 (en) * | 2012-01-04 | 2012-09-04 | Naturalis, S.A. | Carrier fluid composition comprising fatty acids ethyl esters and process for reducing the concentration of persistent organic pollutants in fish oil |
| CN107488503A (en) * | 2017-08-26 | 2017-12-19 | 中山大学惠州研究院 | A kind of method using the pure physical refining camellia seed oil of three-level molecular clock |
| CN107828507A (en) * | 2017-11-01 | 2018-03-23 | 广州市浩立生物科技有限公司 | A kind of camellia seed oil refinement method and equipment |
| CN110642826A (en) * | 2019-09-05 | 2020-01-03 | 江西省科学院应用化学研究所 | Method for extracting vitamin E from tea oil deodorized distillate by using molecular distillation technology |
| CN110760385A (en) * | 2019-11-15 | 2020-02-07 | 湖南省康多利油脂有限公司 | Method for removing benzopyrene in tea oil |
| CN112159706A (en) * | 2020-10-12 | 2021-01-01 | 贵州航天乌江机电设备有限责任公司 | Efficient perilla seed oil preparation process |
Non-Patent Citations (2)
| Title |
|---|
| S. SEZER KIRALAN， AZIZ TEKIN: "Reducing polycyclic aromatic hydrocarbons (PAHs) in olive pomace oil using short-path molecular distillation", 《FOOD ADDITIVES & CONTAMINANTS: PART A》, vol. 37, no. 3, pages 402 * |
| 王臣: "《刮膜式分子蒸馏精制山茶油实验 及液膜流动和传热的模拟研究》", 硕士学位论文, pages 12 - 15 * |
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