Acetazolamide Sodium Powder via Aseptic Spray Drying
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Solution Overview
Problem
The high cost and energy inefficiency of lyophilization processes for producing acetazolamide sodium powder for injection, coupled with the limited application of spray drying in pharmaceuticals due to solubility issues and potential residual organic solvents, hinder the development of efficient and safe manufacturing methods for acetazolamide sodium.
Innovation Solution
A spray drying method is developed to prepare acetazolamide sodium powder by dispersing acetazolamide powder in water, mixing with a sodium hydroxide solution, filtering, and then aseptically spray drying the solution to produce a powder that can be reconstituted for intravenous administration, utilizing a cyclone system and controlled temperature and gas flow to achieve a stable and amorphous powder form.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lyophilization is used to prepare acetazolamide sodium powder, then the powder quality and solubility are ensured, but the production cost and energy consumption increase significantly
Solution Approach 1:
The invention changes the processing parameters by using spray drying instead of lyophilization, adjusting the solution concentration (5-20% w/v) and drying conditions to achieve the desired powder quality with lower energy consumption. The spray drying process parameters including inlet temperature, airflow rate, and solution feed rate are optimized to produce amorphous or partially amorphous powder with high solubility.
2Use of energy by stationary object
If spray drying is used to prepare acetazolamide sodium powder, then the energy efficiency and production cost are improved, but the application in pharmaceuticals is limited due to solubility issues and residual solvents
Solution Approach 1:
The invention optimizes spray drying parameters including solution concentration (5-20% w/v), inlet temperature (150-250°C), and airflow rate to produce powder with amorphous or partially amorphous structure, which enhances solubility. The process is carefully controlled to eliminate residual solvents while maintaining high solubility of acetazolamide sodium.
Solution Approach 2:
The invention uses composite spray drying technology combining acetazolamide sodium solution with specific excipients or carriers to create a composite powder structure that maintains high solubility while enabling efficient spray drying processing. The composite approach addresses both solubility requirements and processing efficiency.
3Productivity
If spray drying is used to prepare acetazolamide sodium powder, then the production efficiency and automation are improved, but the process complexity and control requirements increase
Solution Approach 1:
The invention employs a spray drying system that integrates multiple functions including solution atomization, heating, drying, and powder collection in a single continuous process. The apparatus combines spray nozzle, drying chamber with temperature control, and cyclone separator to achieve continuous production with automated control, reducing overall process complexity despite high productivity.
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 significantly reduces production costs and energy consumption compared to lyophilization, while ensuring high bioavailability and safety by eliminating residual organic solvents and maintaining the required pH and crystal structure of acetazolamide sodium, making it suitable for intravenous use.
Implementation Method 1
the liquid droplets contact the heated gas, e.g., air or nitrogen (N2), and then the liquid droplets evaporate to accompany with the nucleation of particles in a short period
Implementation Method 2
the dried particles are collected by a cyclone system incorporated with a bag filter or wet scrubber
Data Source
AI summary
A method for preparing acetazolamide sodium powder for injection is provided. The method includes steps of providing an acetazolamide sodium solution; and aseptically spray drying the acetazolamide sodium solution to obtain the acetazolamide sodium powder.