Botanical Freeze Drying System Vacuum Sublimation
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Solution Overview
Problem
Conventional drying and curing methods for botanicals result in product loss, oxidation, and degradation, with high energy costs and long processing times, while traditional freeze drying only addresses drying and not the chemical and biological changes during curing.
Innovation Solution
A modular freeze drying system comprising vacuum chambers, conduits, and a condenser unit, allowing for optimized control of temperature and vacuum to preserve volatile compounds and prevent oxidation, with the option to age botanicals before freeze drying and finish curing under different conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional drying methods are used, then botanicals can be dried and cured, but product loss occurs through mold, mildew, oxidation, and loss of volatile essential oils
Solution Approach 1:
The patent applies vacuum conditions to create an inert environment that prevents oxidation of botanical compounds. By removing oxygen from the drying atmosphere, the system prevents oxidative degradation of essential oils and other volatile compounds while still enabling effective moisture removal through sublimation.
Solution Approach 2:
The patent utilizes the phase transition of water from liquid to vapor through freeze-drying (lyophilization). By freezing the botanical material and then applying vacuum to enable sublimation, the system removes moisture without heating the material, thereby preserving volatile essential oils that would otherwise be lost through conventional thermal drying.
2Reliability
If conventional drying methods are used, then botanicals can be dried, but the process takes weeks or months and requires high energy consumption
Solution Approach 1:
The patent employs freeze-drying technology that utilizes phase transitions of water (liquid→frozen→vapor through sublimation) to dramatically accelerate the drying process. By removing ice crystals through vacuum sublimation rather than evaporating water through heating, the system achieves complete drying in hours rather than weeks or months.
Solution Approach 2:
The patent changes the temperature parameter from ambient or elevated temperatures to sub-zero temperatures, enabling rapid moisture removal through vacuum sublimation. This parameter change fundamentally alters the drying mechanism, allowing much faster moisture removal while preserving product quality.
3Reliability
If conventional drying methods are used, then botanicals can be dried, but high HVAC costs and air flow requirements are needed to prevent mold and mildew
Solution Approach 1:
The patent creates a vacuum environment that is inherently resistant to mold and mildew growth, eliminating the need for high air flow and HVAC systems. The vacuum condition removes moisture from the air and prevents the humid conditions that promote fungal growth, thereby preventing mold and mildew without requiring energy-intensive ventilation systems.
4Productivity
If botanicals are thoroughly dried to remove water, then extraction efficiency improves, but volatile essential oils are lost and oxidation occurs
Solution Approach 1:
The patent uses vacuum sublimation to remove water in the form of ice crystals, which allows thorough drying without the thermal stress that causes oxidation and loss of volatile essential oils. The low-temperature vacuum drying process removes moisture effectively while preserving the integrity of sensitive volatile compounds.
Solution Approach 2:
The vacuum environment provides an inert atmosphere that prevents oxidation of volatile essential oils during the drying process. By removing oxygen from the environment, the system enables complete moisture removal without the oxidative degradation that would otherwise occur, thereby maintaining extraction efficiency while preserving volatile compounds.
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 system reduces product degradation, preserves organoleptic characteristics, and offers flexible moisture control, improving shelf life and extraction efficiency by addressing the limitations of conventional methods.
Implementation Method 1
a chamber below the freezing point of water under vacuum to effect the sublimation of water
Implementation Method 2
a condenser unit, and a vacuum pump
Data Source
AI summary
Systems and methods for freeze drying botanical or herb items or products using a modular vacuum chamber configuration are provided. Such configurations can reduce or prevent the evaporative loss of volatile compounds while reducing the temperature and removing air to prevent oxidation of the product. The freeze drying systems and methods of the present invention can improve organoleptic characteristics, shelf life, and extractions.