Vibrating Vacuum Reactor for Uniform API Coating
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Solution Overview
Problem
Existing techniques for coating active pharmaceutical ingredients (APIs) face challenges such as non-uniform coatings, particle agglomeration, and degradation, which hinder the scalability and effectiveness of drug product manufacturing.
Innovation Solution
A method involving a vibrating reactor chamber with a vacuum system that agitates particles and uses alternating precursor gases to form thin films, allowing for uniform coating of API particles with a high volume manufacturing process, reducing particle agglomeration, and preventing API degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spray coating is used to coat API particles, then the coating process can be scaled industrially, but non-uniform coatings and particle agglomeration occur
Solution Approach 1:
The reactor chamber is vibrated at frequencies between 30-300 Hz during the coating process to agitate particles and prevent agglomeration, enabling uniform coating deposition while maintaining industrial scalability
Solution Approach 2:
The process transitions from conventional atmospheric pressure spray coating to vacuum-based coating with controlled particle agitation through vibration, changing the physical parameters to achieve both uniformity and scalability
2Manufacturing precision
If plasma polymerization is used to coat API particles, then coating can be achieved, but the process is difficult to scale and can degrade sensitive APIs
Solution Approach 1:
The coating process is conducted in a vacuum environment with controlled inert gas flow, protecting sensitive APIs from degradation while enabling scalable manufacturing through a controlled reactor system
Solution Approach 2:
Vibration of the reactor chamber prevents particle agglomeration and ensures uniform coating distribution, making the process scalable while maintaining high coating quality
3Manufacturing precision
If hot wire CVD is used for coating, then coating can be formed, but the system is not suitable for high-volume manufacturing
Solution Approach 1:
The process uses sequential precursor delivery with multiple filters to create controlled reaction zones, enabling precise coating formation while the vacuum reactor design supports high-volume manufacturing
Solution Approach 2:
The system transitions from hot wire-based CVD to a vacuum-based process with controlled precursor delivery and particle vibration, enabling both precise coating formation and high-volume manufacturing capability
4Manufacturing precision
If atomic layer deposition is used for coating, then inorganic coatings can be deposited, but the technique is not suitable for organic polymer coatings
Solution Approach 1:
The vacuum reactor system with vibration and controlled precursor delivery can deposit both inorganic and organic coatings through the same fundamental mechanism of sequential precursor reaction and condensation on particle surfaces
Solution Approach 2:
By adjusting precursor types, reaction conditions, and vibration parameters, the same reactor system can accommodate different coating materials including both inorganic and organic polymers
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
The method achieves uniform and consistent thin film coatings across particles, enhancing the stability and bioavailability of APIs, facilitating high-volume manufacturing, and reducing production costs.
Implementation Method 1
evacuating the processing volume through a vacuum port on the vacuum chamber
Implementation Method 2
agitating particles disposed in the processing volume of the vacuum chamber by vibrating the vacuum chamber at a frequency between 30 Hz and 300 Hz
Implementation Method 3
flowing a first precursor into the processing volume through a gas inlet on the vacuum chamber and through the second filter and reacting the particle surfaces of the particles with the first precursor as the particles are agitated to form a first layer
Data Source
AI summary
A reactor for coating particles includes a vacuum chamber configured to hold particles to be coated, a vacuum port to exhaust gas from the vacuum chamber via the outlet of the vacuum chamber, a chemical delivery system configured to flow a process gas into the particles via a gas inlet on the vacuum chamber, one or more vibrational actuators located on a first mounting surface of the vacuum chamber, and a controller configured to cause the one or more vibrational actuators to generate a vibrational motion in the vacuum chamber sufficient to induce a vibrational motion in the particles held within the vacuum chamber.