High-temperature reactors in the amixon® pilot plant
This technical pilot plant II was newly built by amixon for our customers. Due to Corona, all three reactors will only be available in winter 2022. This is where we carry out demanding vacuum mix drying and synthesis reactions for our customers.
If gauge pressure or vacuum is required in the process chamber, then gas-tight shaft seals and closure fittings are needed. Sometimes there are even further requirements:
- free of dead space and hygienically
- suitable also suitable for abrasive bulk materials
- also suitable for chemically aggressive materials
- operable up to 350°C
- ceramic coating protects the mixed material
amixon® has reliable solutions for precisely such requirements. We will be happy to demonstrate these to you in our pilot plant II!
Question from a customer: What are the special features that will characterise your new Pilot plant?
Answer from amixon®: In this pilot plant, we improve classic solid chemistry processes. By this we mean the synthesis reaction and vacuum mixing/ drying. The aggregate states of the goods are gaseous, liquid and powdery. The dispersions are either dry, moist, wet or suspended.
- Vacuum less than 10 mbar absolute
- Pressure up to 25 bar
- Temperatures from -70°C to +350°C are possible at varying pressures
- particularly hygienic design
- the mixing process can be particularly gentle or aggressive-desagglomerating
- excellent efficiency in heat transfer
- the goods and solvents can be highly corrosive
- they can be burnable or dust explosive
- they can be hazardous
- they can be abrasive
- they can have high bulk densities
- they may exhibit plastic consistencies during reaction or drying.
- Materials Alloy 59 or
- 1.4462 or
- 1.4404 or
- optionally ceramic coated
Comment and questions from a customer: Sometimes mixing goods are particularly abrasive, but they are sensitive in terms of metallic contamination. What is your recommendation? Are there mixer reactors that have a wear-resistant lining and still allow mixing at high temperatures, at vacuum or gauge pressure?
Answer from amixon®: Yes, such mixer-synthesis reactors are also available in the amixon® technical centre. All parts in contact with the product are coated with a high-performance ceramic. Metallic abrasion is excluded during mixing/reacting/drying.
The mixer/reactor is both vacuum-tight and pressure-tight. The absolute pressure in the mixing chamber can vary from approx. 10 mbar to 6 bar. The mixed materials can be heated up to 340°C. The combination of these features is a novelty.
Question from a customer: How do I have to imagine such a trial in the pilot plant? Every customer has different requirements, different products. Is it possible to fulfil all tasks with a test mixer?
Answer from amixon®: No, unfortunately you can't. amixon GmbH has 34 different test mixers/ process machines. We cordially invite you to visit us in Paderborn. amixon® can perform particularly challenging process operations. The trials in our pilot plant will show good test results. A tour through our factory will show you our state-of-the-art production.
In the amixon® factory you will see excellent apparatus engineering, because we manufacture everything ourselves in our own factory. Only gearboxes and motors are bought in.
Question from a customer: Why does amixon® manufacture both conical process apparatus and flat-bottomed process apparatus?
Answer from amixon®: Both systems are similarly efficient. They provide ideal mixing qualities that can no longer be improved in practice. The flat bottom system requires less vertical installation space.
The conical system is preferred when a synthesis or drying process causes extreme density differences, or when suspensions are evaporated. A process apparatus with a conical mixing chamber allows greatly varying degrees of filling. In addition, the conical apparatus can, if necessary, discharge completely if the end product is pourable and free-flowing.
Due to the design, the production of a flat-bottom system is somewhat less expensive. Some customers want to enter the apparatus for the purpose of inspection or cleaning. In this case, large flat-bottomed units are more convenient. Some dried agents are extremely lumpy, bridging and poorly flowing. Such products must be actively swept out of the mixing chamber with mixing tools. In such cases, the flat-bottomed apparatus is also preferable.
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