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1: Reduce the heterogeneity (phase, temperature, concentration, etc.) of the system to achieve the desired process results.
2: Key targets for mass transfer, heat transfer, reaction, and product characteristics.
Second, what are the consequences of poor mixing and mixing ?
Successfully producing products that meet process goals is critical. If the product produced during the process enlargement fails to achieve the required yield, quality and performance, the production cost will increase significantly, and more importantly, when investing money and time to improve the mixing and mixing effects, it may be eye-catching. Watching the loss of the market.
The money spent on solving the mixing problem during the production process may be far more than the cost of fully evaluating and resolving the mixing problem during the process development process. In order to increase the mixing effect, the capital is very large. In the United States, for example, in the chemical industry, the loss due to poor mixing and mixing is about 5%. In 1989, only the chemical industry lost $10 billion. In 1993, a multinational chemical company caused a loss of $100 million due to poor mixing.
3. To what extent is it sufficient? When will the yield and product quality be reduced due to over-mixing?
This depends on the sensitivity of the product's quality and selectivity to the agitation intensity and agitation time. This requires a detailed understanding of these through experiments or simulations before process development and amplification.
4. How to solve the new mixing and mixing problems ?
The first question is "Why is this problem?" and "How did this problem arise?". This requires communication with the operator and the chemist responsible for process development. Then these questions evolved into "How can we zoom in this way?" and "How can the conditions of the lab and the factory be so different?"
The importance of these issues may always be underestimated. The vast majority of engineers are just asking questions about geometric similarities and reaction conditions. A good experimental design requires a thorough understanding of the mixing mechanism in order to get useful experimental results. Engineers who don't understand the mixing mechanism may just be taking risks.
What is mixing and mixing?
1. What is mixing and mixing ?
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