Green Conifer Needle Processing for Labdanoid Yield
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Solution Overview
Problem
Existing methods for processing green conifer needles are inefficient in isolating and utilizing all extractive compounds, particularly those non-soluble in low-polar solvents, leading to partial dehydration and isomerization of labdanoids, resulting in reduced yields and the formation of artificial compounds.
Innovation Solution
A method involving extraction with an organic solvent, followed by separation of waxes, saponification, and fractionalization of neutralized solutions to isolate chlorophyllin acids, diterpene, and higher fatty acids, with treatment using low-molecular alcohol and acidification to enhance yields of labdanoids, polyprenols, and chlorophyllin acids, and utilizing chromatography to obtain polyprenols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If extraction is performed using only low-polar solvents (petroleum, petroleum ether), then the extraction process is simple and easy to operate, but only a part of the extractive compounds can be isolated and utilized, leaving non-soluble compounds behind in the green needles
Solution Approach 1:
The extraction process is segmented into multiple stages using different solvents with increasing polarity. First, low-polar solvents (petroleum ether) extract non-polar compounds, then mid-polar solvents (dichloromethane) extract intermediate compounds, and finally polar solvents (methanol) extract polar compounds. This segmentation allows comprehensive isolation of all extractive compounds while maintaining operational simplicity through systematic progression.
Solution Approach 2:
The solvent polarity parameter is systematically changed across extraction stages. The process transitions from low-polarity petroleum ether to mid-polarity dichloromethane to high-polarity methanol, enabling selective extraction of different compound classes based on their solubility characteristics, thereby maximizing total extractive compound yield.
2Manufacturing precision
If vacuum distillation is performed at high temperature to separate neutral compounds, then the separation efficiency is improved, but labdanoids undergo partial dehydration and isomerization, resulting in reduced yields and formation of artificial compounds
Solution Approach 1:
The distillation temperature parameter is strictly controlled and reduced to below 60°C under vacuum conditions. This parameter change prevents thermal degradation of labdanoids while maintaining adequate separation efficiency through the use of vacuum (reduced pressure) which lowers the boiling point of compounds, allowing separation at temperatures that preserve chemical stability.
Solution Approach 2:
The extraction and separation process is designed to be continuous and gentle throughout. After extraction, the solvent is removed by evaporation at controlled temperature, followed by immediate cold storage at -20°C to continuously preserve labdanoid integrity. This continuous protective action prevents degradation while maintaining separation efficiency.
3Manufacturing precision
If the extract is settled at 0-24°C for 16-24 hours to separate crystalline fraction, then the purity of maltol is improved to 98-99.9%, but the process time and energy consumption increase
Solution Approach 1:
The extract is pre-cooled to -20°C before settling, which preliminary prepares the system for rapid crystallization. This preliminary cooling action significantly reduces the subsequent settling time required to achieve high purity maltol separation, as the temperature gradient and supersaturation are already established before the settling phase begins.
Solution Approach 2:
The process utilizes phase transition of maltol from dissolved state to crystalline state through controlled cooling. By transitioning the extract to -20°C, maltol crystallizes out of solution, allowing easy separation by filtration or decantation. This phase transition enables high purity recovery (98-99.9%) while reducing settling time compared to slower cooling methods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method increases the yield of labdanoids, higher fatty acids, polyprenols, and chlorophyllin acids, while producing a more effective rodent repellent and antiseptic agent, improving the overall efficiency of extractive compound processing from conifer needles.
Implementation Method 1
extraction of plant raw materials with an organic solvent
Implementation Method 2
separation of waxes from the obtained solution of extractive compounds in hydrocarbon solvent by an alkaline solution; subsequent separation by settling of chlorophyllin acids and fraction of fatty and resin acids
Implementation Method 3
separation of free acids from the obtained solution of extractive compounds in hydrocarbon solvent by an alkaline solution
Implementation Method 4
acidification of the water-alkaline solution of salts by a non-organic or organic acid; separation of chlorophyllin acids and fraction of fatty and resin acids by settling
Implementation Method 5
separation of chlorophyllin acids and fraction of fatty and resin acids by settling
Implementation Method 6
distillation off of the solvent from neutral compounds and separation of neutral compounds
Data Source
AI summary
The inventive method for processing vegetable raw materials consisting in organic solvent-extracting said materials, isolating it by retention which is associated with cooling and wax filtration, separating free oxides from the thus obtained solution of extractive substances by alkali solution action, dividing the obtained neutralized solution into a neutral substance solution in the hydrocarbon solvent and a water-alkali solution of organic acid salts, acidifying said salt solution, isolating chlorophilline acids and a fatty and resin acid fraction therefrom by retention, dividing the sum of diterpenic and higher fatty acids, distilling the solvent from neutral substances and in dividing said neutral substances. The diterpenic and higher fatty acid sum is treated in a low-molecular alcohol by adding a sulphuric acid in the form of a catalyst. Said method also consists in distilling alcohol and neutralizing the diterpenic acids and catalyst, extracting the higher fatty acid ethers, acidifying the water-alkali solution and extracting isolated diterpenic acids, distilling said solvent and in producing a rodent repellent. The neutral substances are subsequently extracted into acetone and C1-C3 alcohol. Afterwards, during acetone treatment, the concentrates of higher fatty acid esters are produced in association with triterpenic alcohols, stearins, higher fatty alcohols and an acetone-soluble residue. During the residue treatment by alcohol, the sum of diterpenic acids is separated, and the saponification of said acids makes it possible to produce a polyprenol concentrate for separating polyprenols therefrom by chromatography.