Continuous Pharmaceutical Mixing with Real-Time API Control
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Solution Overview
Problem
Existing continuous manufacturing processes for liquid pharmaceutical compositions struggle with maintaining precise and accurate API content, especially at low concentrations, and face challenges in reducing overall residence time, footprint, waste production, and fluctuation normalization.
Innovation Solution
A continuous manufacturing process that includes a mixing unit coupled downstream to a holding unit, allowing for real-time control of API concentration, low residence time, and reduced waste, with adjustable dispensing rates and optional features like microdosing and in-line weighing to normalize fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional batch manufacturing processes are used, then flexibility in production is maintained, but API concentration precision and accuracy deteriorate, especially at low concentrations
Solution Approach 1:
The patent implements a continuous manufacturing process where the mixing unit operates dynamically with adjustable dispensing rates for the therapeutic agent and liquid vehicle. This dynamic control system allows real-time adjustment of API concentration while maintaining continuous operation, thereby achieving both precision at low concentrations and manufacturing flexibility through programmable rate adjustments.
Solution Approach 2:
The patent incorporates in-line weighing devices and sensors that provide real-time feedback on API concentration and mixing parameters. This feedback loop enables continuous monitoring and adjustment of the dispensing rates, ensuring precise API concentration control while maintaining the ability to adapt to different production requirements, thus resolving the contradiction between precision and flexibility.
2Loss of time
If conventional mixing processes are used, then simple equipment configuration is maintained, but residence time and fluctuation normalization capability worsen
Solution Approach 1:
The patent divides the mixing system into distinct functional units: a mixing unit for initial combination, a holding unit for residence time and fluctuation normalization, and in-line weighing devices for monitoring. This segmentation allows each unit to be optimized for its specific function, reducing overall residence time while providing the necessary complexity only where needed for time normalization and fluctuation control.
Solution Approach 2:
The holding unit acts as an intermediary between the mixing unit and the final product output. It provides the necessary residence time for fluctuation normalization without requiring the entire system to be complex, thereby reducing overall residence time requirements while maintaining the capability for effective concentration normalization through its buffering function.
3Loss of substance
If conventional manufacturing processes are used, then standard operational procedures are maintained, but waste production and margin of error increase
Solution Approach 1:
The patent implements a continuous manufacturing process where the mixing unit operates continuously with steady-state dispensing rates, eliminating the start-stop operations of batch processes. This continuity reduces waste production by maintaining consistent API concentration throughout the process and minimizes margin of error through uninterrupted monitoring and control, while the automated control system manages the continuous operation efficiently.
Solution Approach 2:
The patent replaces manual batch-to-batch transfer operations with an automated continuous flow system featuring in-line weighing and electronic control of dispensing rates. This substitution of mechanical batch operations with automated continuous control reduces waste from transfer operations and minimizes human error, achieving lower waste production and margin of error through enhanced automation.
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 process achieves precise and accurate API content, reduces overall residence time, minimizes waste production, and effectively normalizes API concentration fluctuations, making it suitable for high potency APIs and scalable from lab to industrial scale.
Implementation Method 1
dispensing the therapeutic agent and the liquid vehicle from the corresponding supplies and feeding them into a mixing unit (1), operating the mixing unit (1) thereby obtaining a liquid composition having a therapeutic agent concentration
Implementation Method 2
discharging the liquid composition from the mixing unit (1) into a holding unit (2), the holding unit (2) being configured so that the unit residence time of the liquid composition is at least sufficient to normalize the therapeutic agent concentration
Data Source
AI summary
The present disclosure discloses a process for the continuous manufacture of a liquid pharmaceutical composition, the process comprising providing a mixing unit, feeding a therapeutic agent and a liquid vehicle to the mixing unit, operating the latter thereby mixing the agent and the vehicle into a liquid pharmaceutical composition, discharging the composition into a holding unit.