What is mixing and blending? 1. Reduce the non uniformity of the system (phase, temperature, mg/L) to reach the required process result. 2. The main target is quality transfer, heat transfer, reaction and production character. What’s the result if it is not well mix and blend ? It is important to successfully manufacture standard product. If the product can not reach the productivity, quality and performance after enlarge the production that will obviously increase the cost, more important is you will lose the market during you adjust the effect of mixing and blending. It will spend more money and time to solve the problem during the production than developing the process. That need large money to advance the mixing effect, for example, the loss caused by mixing problem is about 5% in the chemical industrial. In 1989, only the chemical industrial lose 10-100 hundreds millions. In 1993, a multinational chemical company lost a hundred million because of the mixing problem. What is the ideal mixing? What will cause over mixing that result in lower yield and quality? This depends on the sensitive of the product quality and selectivity to the mixing time and mixing stirring intensity. That needs to do experiment and simulate before development and large production. How to solve the problem of mixing and blending? First, need to how does the problem come? This needs to communicate with the operator and the engineer, and then will become the problem of how can enlarge production like this and what is the difference between the lab and the production department. It needs to know well about the experimental mechanism, only like this will get effective experiment result. Operating specification of the mixing and blending. In many industries, mixing and blending plays important part, like fine machining, biochemistry, agro-chemistry, polymer technique, cosmetic, consumption, food, drinking, waste water treatment.