阅读说明：本技术 含四氢大麻酚洗脱液的销毁方法 (Destroying method for tetrahydrocannabinol-containing eluent ) 是由 不公告发明人 于 2021-06-29 设计创作，主要内容包括：本发明旨在提供一种低成本、工艺简便、可工业化生产的彻底销毁含有四氢大麻酚洗脱液中四氢大麻酚的方法。本发明的方法是将四氢大麻酚与二氧化氯水溶液接触,二氧化氯水溶液的二氧化氯含量大于等于2％,本发明可有效去除含THC洗脱液中的THC,使其含量下降到可排放的标准0.01g/L以下。(The invention aims to provide a method for thoroughly destroying tetrahydrocannabinol in tetrahydrocannabinol containing eluent, which has low cost and simple and convenient process and can be used for industrial production. The method of the invention is to contact the tetrahydrocannabinol with the chlorine dioxide aqueous solution, the chlorine dioxide content of the chlorine dioxide aqueous solution is more than or equal to 2 percent, the invention can effectively remove the THC in the THC-containing eluent, and the content of the THC in the THC-containing eluent is reduced to be below the standard of 0.01g/L which can be discharged.)

1. A method for destroying tetrahydrocannabinol, characterized in that tetrahydrocannabinol is contacted with an aqueous solution of chlorine dioxide.

2. The method for destroying tetrahydrocannabinol as recited in claim 1 wherein said aqueous chlorine dioxide solution has a chlorine dioxide content of 2% or greater.

3. A method of destroying thc as defined in claims 1-2 wherein thc is present in dissolved form in an organic solution and wherein the amount of aqueous chlorine dioxide solution used is 1% -10% of thc organic solvent content.

4. A method for destroying tetrahydrocannabinol as claimed in claims 1-3, characterized in that the amount of chlorine dioxide water solution used is 5% of the content of the tetrahydrocannabinol organic solvent; the chlorine dioxide aqueous solution is obtained by reacting chlorite and protonic acid in an aqueous solution.

5. A method for destroying tetrahydrocannabinol in an eluate containing tetrahydrocannabinol, characterized in that the eluate containing tetrahydrocannabinol is contacted with an aqueous solution of chlorine dioxide to remove the tetrahydrocannabinol.

6. A method of destroying tetrahydrocannabinol contained in an eluate as claimed in claim 5, wherein the amount of aqueous chlorine dioxide solution is between 1% and 10% of the amount of the eluate containing tetrahydrocannabinol.

7. A method of destroying thc in an eluate containing thc as claimed in claim 5, wherein the content of available chlorine dioxide in the aqueous chlorine dioxide solution is 2% or more.

8. A method for destroying tetrahydrocannabinol in an eluent containing the tetrahydrocannabinol is characterized in that the eluent containing the tetrahydrocannabinol is taken, a 1% -10% chlorine dioxide water solution of the eluent is added, the mixture is stirred and stands for half an hour, sodium hydroxide is added to adjust the pH value to be about 6, and the THC content is detected by HPLC.

9. A method for destroying tetrahydrocannabinol in an organic solvent containing tetrahydrocannabinol is characterized in that an eluent containing the tetrahydrocannabinol is taken, a 5% chlorine dioxide aqueous solution of the eluent is added, the mixture is stirred and stands for half an hour, then sodium hydroxide is added to adjust the pH value to be about 6, and the THC content is detected by HPLC.

10. The oxidant composition capable of effectively destroying tetrahydrocannabinol is characterized by being a chlorine dioxide aqueous solution, wherein the content of effective chlorine dioxide in the chlorine dioxide aqueous solution is more than or equal to 2%, and the pH value is 8.2-9.2; the chlorine dioxide aqueous solution is obtained by reacting chlorite and protonic acid in an aqueous solution.

Technical Field

The invention belongs to the field of natural medicinal chemistry, and particularly relates to a method for safely and environmentally destroying tetrahydrocannabinol completely.

Background

Cannabidiol, CBD for short, is white crystal powder extracted from industrial hemp, and has high medicinal value. Studies have shown that CBD has the potential to alleviate chronic pain, anxiety, inflammation, depression and many other symptoms, and the practical use of CBD has proven itself. Meanwhile, derived cosmetics, health care products and the like gradually appear on the market and are accepted by consumers.

In the use process of cannabidiol as a therapeutic drug, tetrahydrocannabinol (also called THC) contained in cannabidiol is a component with hallucinogenic effect, is a main psychoactive substance in cannabis, and limits the development and utilization of cannabidiol to a certain extent due to the fact that the tetrahydrocannabinol has addiction and cytotoxicity and can cause adverse reactions such as convulsion, vomit, multiple sclerosis relapse and the like. Tetrahydrocannabinol is usually separated from other active ingredients during the development of cannabis active ingredients, and should be thoroughly destroyed after separation in order to prevent its circulation as a drug.

THC was first isolated by three researchers at the wilhelminthman scientific institute of haworth, israel in 1964. The pure THC is a glassy solid at low temperature, and the viscosity of the THC gradually increases when the temperature is increased. It is an aromatic terpene and therefore poorly soluble in water, but readily soluble in most organic solvents.

The traditional destroying mode of the THC is incineration, but when the THC is incinerated, toxic gas is easily generated, so that the environment is polluted, and meanwhile, toxic smoke generated by incineration can also hurt the nervous system of a human body, so that a series of adverse reactions are caused; secondly, when the incineration is insufficient, the risk that drugs are not completely destroyed exists, and the incinerated solid ash is sampled and detected, so that the condition that the distribution of samples is uneven exists, and the detection result cannot effectively represent the overall destruction effect; in addition, the procedure that operators contact with drugs exists in the incineration process, so that the risk of drug loss exists; finally, in the burning process, operators directly or indirectly contact drugs, and the long-term contact of the operators can damage the health of the bodies and is not beneficial to labor protection.

Some methods of THC destruction have been reported in the prior art, and CN106563685B protected a method of destroying THC comprising the steps of: 1) adding deionized water into a reactor, and heating to 60-100 ℃; 2) adding acid, wherein the acid is one or a combination of more than two of inorganic acid and/or organic acid, the pH value range of the system is 0.1-3.0, the inorganic acid is hydrochloric acid, nitric acid, phosphoric acid and sulfuric acid, and the organic acid is citric acid, salicylic acid, tartaric acid and acetic acid; 3) placing a carrier loaded with a catalyst into a reactor, wherein the dosage of the catalyst is 1/200-1/50 of the mass of the introduced THC-containing liquid, and the catalyst in the step 3) contains reducing metal cations and/or halogen anions; 4) adding an oxidant into the reactor, wherein the oxidant comprises one or more than two of hydrogen peroxide, peracetic acid, sodium dichromate, chromic acid, nitric acid, potassium permanganate, ammonium persulfate, hypochlorous acid and perchloric acid, and the concentration of the oxidant in a reaction system is 0.1-4 mol/L; 5) introducing a liquid containing THC into a reactor, wherein the inflow speed of the liquid containing THC is 0.1-5 times of the volume/h of the reactor; 6) and detecting and confirming the destruction result. The method needs to be treated by acid and then added with oxidant under the heating condition, although the method can effectively remove THC, the method needs more rigorous conditions such as heating, acid treatment and oxidant treatment, and also needs carrier filtration such as activated carbon, and the like, so that the method is complex in process, high in cost and difficult to realize industrial production.

CN112023327A also claims a THC destruction method, which requires a special reaction vessel, and multi-step complicated process conditions such as acid treatment, oxidant treatment, neutralization reaction, etc. when applied, not only the process is complicated, but also the treatment cost is high, and it is difficult to realize industrial production.

The eluent containing tetrahydrocannabinol is generated in the process of extracting and preparing cannabidiol, and cannot be directly discharged due to over standard THC content, so that the eluent needs to be destroyed.

Both of the above-mentioned patents CN112023327A and CN106563685B are directed to separation and collection of THC, followed by concentrated destruction of THC sample, and are not directed to a destruction method of THC in an eluate containing THC generated during CBD separation.

Through retrieval, no method for directly destroying the tetrahydrocannabinol in the eluate containing the tetrahydrocannabinol is reported in the prior art.

Disclosure of Invention

In order to solve the technical problems mentioned in the background art, the invention aims to provide a method for thoroughly destroying tetrahydrocannabinol in an eluent containing the tetrahydrocannabinol, which has low cost and simple and convenient process and can be used for industrial production.

In one aspect, the invention provides a method for destroying tetrahydrocannabinol by contacting tetrahydrocannabinol with an aqueous solution of chlorine dioxide, wherein the chlorine dioxide content of the aqueous solution of chlorine dioxide is greater than or equal to 2%.

As a further limitation of the invention, the tetrahydrocannabinol is present in dissolved form in an organic solution, and the amount of the aqueous solution of chlorine dioxide is 1% to 10% of the organic solvent content of the tetrahydrocannabinol.

As a further limitation of the present invention, the amount of the chlorine dioxide aqueous solution used is preferably 5% of the content of the tetrahydrocannabinol organic solvent.

In another aspect, the present invention provides a method for destroying tetrahydrocannabinol in an eluate containing tetrahydrocannabinol, characterized in that the eluate containing tetrahydrocannabinol is contacted with an aqueous solution of chlorine dioxide to destroy the tetrahydrocannabinol. The dosage of the chlorine dioxide water solution is 1-10% of the eluent containing the tetrahydrocannabinol. As a further limitation of the present invention, the effective chlorine dioxide content of the chlorine dioxide aqueous solution is 2% or more.

As a further limitation of the present invention, the specific method of the present invention is: adding 1-10% chlorine dioxide water solution into the eluent containing tetrahydrocannabinol, stirring, standing for half an hour, adding sodium hydroxide to adjust pH to 6, and detecting THC content by HPLC.

As a further limitation of the present invention, the specific method of the present invention is: adding 5% chlorine dioxide water solution into the eluent containing tetrahydrocannabinol, stirring, standing for half an hour, adding sodium hydroxide to adjust pH to 6, and detecting THC content by HPLC.

On the other hand, the invention provides an oxidant composition capable of effectively destroying tetrahydrocannabinol, which is characterized in that the oxidant composition is a chlorine dioxide aqueous solution, the content of effective chlorine dioxide in the chlorine dioxide aqueous solution is more than or equal to 2%, and the pH value is 8.2-9.2.

The chlorine dioxide aqueous solution is obtained by reacting chlorite and protonic acid in an aqueous solution, specifically, sodium chlorite, potassium chlorite and magnesium chlorite can be used as the chlorite, and the sodium chlorite is preferred; the protonic acid can be selected from hydrochloric acid, acetic acid, sulfuric acid, methanesulfonic acid, carbonic acid, etc., preferably citric acid.

The invention provides a destroying method for tetrahydrocannabinol in tetrahydrocannabinol-containing eluent. The THC destroying method aims at the THC centralized destroying method after separation, collection and summarization, the THC destroying method does not need to collect and summarize the THC in eluent, circulation risks caused by drug collection and summarization are avoided, and production cost is saved; the elution solution is directly oxidized to remove THC, so that the health influence of workers on THC sample contact is reduced. The invention has wide application range, different eluents do not influence the effect of the chlorine dioxide water solution on THC destruction, and the conventional eluent can be applied. The chlorine dioxide destroying solution with the dosage of 1 percent to 10 percent can effectively remove THC in the THC-containing eluent, so that the content of the THC in the THC-containing eluent is reduced to be below the standard of 0.01g/L which can be discharged, but the dosage of 5 percent is preferably used in view of cost and environmental pollution. The applicant also tries to destroy THC better than 10% chlorine dioxide destroying liquid, but the cost is higher, and compared with 10% chlorine dioxide destroying liquid, the chlorine dioxide destroying liquid has no technical advantages, increases the production cost, and pollutes the environment, so the dosage range of 1% -10% is selected.

The applicant also tried chlorine dioxide destroying liquid with content lower than 2%, but the chlorine dioxide destroying liquid has no advantages compared with chlorine dioxide destroying liquid with content higher than 2%, and due to low concentration, the usage amount needs to be increased, water resources are wasted, the production cost is increased, and the industrial production is not facilitated.

The THC destroying method does not use acid solution treatment, does not need carrier filtration, does not need a special reaction container, and can thoroughly destroy the THC, and the content of the THC after the THC is destroyed is less than 0.1 percent, thereby reaching the dischargeable standard, and having the advantages of low cost, convenient industrial production, simplicity, environmental protection, no pollution and the like.

Drawings

Fig. 1 is a graph comparing the destruction of THC containing eluents by different oxidants.

FIG. 2 is a schematic HPLC of the determination of the THC content in the original eluate.

Fig. 3 is a schematic diagram of the HPLC for measuring the THC content in the eluent after the chlorine dioxide destroying solution treatment.

Fig. 4 is a schematic diagram of HPLC for measuring the THC content in the eluate after hydrogen peroxide is treated as a destroying solution.

FIG. 5 is a HPLC diagram showing the determination of THC content in the eluate after ferric trichloride is treated as a destroying solution.

FIG. 6 is a HPLC diagram showing the determination of THC content in the eluent after the potassium permanganate is treated as the destroying solution.

FIG. 7 is a HPLC diagram showing the determination of the THC content in the eluate after the nitric acid is treated as the destroying solution.

Detailed Description

The technical solutions of the present invention will be illustrated below with reference to specific examples, which are provided to further illustrate the present invention and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made in the specific embodiments of the present invention without departing from the spirit and scope of the invention.

The experimental reagents of the invention are all commercially available.

Example 1

Preparing chlorine dioxide destroying liquid: adding 500mL of water into a beaker, adding 10 g of sodium chlorite, and stirring to completely dissolve; adding 10 g of citric acid, stirring to completely dissolve, and standing for 30 minutes for later use; the chlorine dioxide content can be detected to be more than or equal to 2 percent.

Example 2

Taking 500mL of ethanol eluent containing THC, detecting the original THC content to be 0.364g/L by HPLC, adding 5mL of chlorine dioxide to destroy liquid, stirring, standing for half an hour for reaction, adjusting the pH value to be about 6 by adding sodium hydroxide, and detecting the THC content to be 0.0085g/L by HPLC.

Example 3

And (3) adding 5mL of chlorine dioxide destroying liquid into 500mL of THC-containing acetonitrile eluent, stirring, standing for half an hour for reaction, adding sodium hydroxide for adjusting the pH value to be about 6, and detecting the THC content to be 0.0081g/l by HPLC.

Example 4

And (2) adding 5mL of chlorine dioxide destroying liquid into 500mL of THC-containing methanol eluent, stirring, standing for half an hour for reaction, adding sodium hydroxide for adjusting the pH value to be about 6, and detecting the THC content to be 0.0091g/l by HPLC.

Examples 2-4 show that different eluents do not affect the destruction of THC by aqueous chlorine dioxide and that conventional eluents are suitable.

Example 5

And (3) adding 10mL of chlorine dioxide destroying liquid into 500mL of THC-containing ethanol eluent, stirring, standing for half an hour for reaction, adding sodium hydroxide to adjust the pH value to be about 6, and detecting the THC content to be 0.0025g/l by HPLC.

Example 6

And (3) adding 20mL of chlorine dioxide destroying liquid into 500mL of THC-containing ethanol eluent, stirring, standing for half an hour for reaction, adding sodium hydroxide to adjust the pH value to be about 6, and detecting the THC content to be 0.0011g/l by HPLC.

Example 7

And (3) adding 20mL of chlorine dioxide destroying liquid into 20mL of ethanol eluent containing THC, stirring, standing for half an hour for reaction, adding sodium hydroxide to adjust the pH value to be about 6, and detecting the THC content to be 0.0008g/l by HPLC.

The above experiments show that 1-10% of chlorine dioxide destroying solution can effectively remove THC in THC-containing eluent, so that the content of THC in THC-containing eluent is reduced to below 0.01g/L which can be discharged, but the 5% of chlorine dioxide destroying solution is preferred in view of cost and environmental pollution.

Comparative example 1

And (3) adding 1mL of hydrogen peroxide (3%) into 10mL of THC-containing ethanol eluent, stirring, standing for half an hour, adjusting the pH to be about 6 by adding sodium hydroxide, and detecting the THC content to be 0.0282g/l by HPLC.

Comparative example 2

Taking 10mL of ethanol eluent containing THC, adding 100mg of ferric trichloride, stirring, standing for half an hour for reaction, adding sodium hydroxide to adjust the pH value to be about 6, and detecting the THC content to be 0.0287g/l by HPLC.

Comparative example 3

And (2) taking 500mL of ethanol eluent containing THC, slowly adding 200mg of potassium permanganate tablets, stirring, standing for half an hour for reaction, adding sodium hydroxide to adjust the pH value to be about 6, and detecting the THC content to be 0.0151g/l by HPLC.

Comparative example 4

And (3) adding 1mL of concentrated nitric acid into 20mL of ethanol eluent containing THC, stirring, standing for half an hour for reaction, adding sodium hydroxide to adjust the pH value to be about 6, and detecting the THC content to be 0.0275g/l by HPLC.

The experimental results show that the THC can be effectively destroyed by adding the chlorine dioxide solution into the THC-containing ethanol solution; the applicant has surprisingly found that THC in chlorine dioxide destruction eluents achieves unexpected technical effects compared to other oxidants, and that very significant THC destruction effects can be achieved at a dosage of 1% to 10%, which is not obvious to the researchers in the field. The addition amount of chlorine dioxide is more than 5 percent.

While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be taken as limiting the invention. Variations, modifications, substitutions and changes to the above-described embodiments can be made by those skilled in the art within the scope of the present invention without departing from the principle and spirit of the invention, and these variations, modifications, substitutions and changes are intended to be included within the scope of the present invention.