- technology discovered here
Search Technologies Technology Needs
Browse Technologies
Browse Technology Needs corporate web site
 Tech of the Week
Each week we feature special technologies. Take a moment to view the other Tech of the Week articles, you may find one that meets a present need.
Antimicrobial trimethylene glycol oligomers
Herbicide discovery and design by utilizing the nucleic acid fragments encoding a glycolysis or respiration protein
High-tensile and tear strength nonwoven fabric for packaging and sheet applications
Modified fullerenes for electronic assemblies and fuel cells
Novel polyolefin film features anti-hydrolysis, low water absorption, low dielectric properties, and high heat resistance
Portfolio of technologies for comfortable, easy-to-use hearing protection that can increase compliance
Refined catmint oil -- a proven-safe, effective natural replacement for DEET -- now available in commercial quantities for insect repellent products
Ultra-low-wear polymer composites for bearing surfaces reduces expense, avoids contamination, reduces weight
Tech of the Week is special. Click View Listing Details to see the full information on this technology -- even if you're not already a member.
To take full advantage of, Become a Member.
 Archive List
Activated carbon from rice husks offers high adsorption and application to difficult filtration tasks
Herbal extract for local treatment of malignant melanoma and breast cancer with superficial lesion
Conductive thermoplastic polymers integrate antennas into the case of the electronic device
Commercial manufacture of vinyl acetate monomer
Laundry technology convenience suite enables a variety of new products alone or in combination
More articles...
 Tech of the Week

Advanced Microreactors Make Chemical Processing Safer, Faster



Until recently, chemical processing typically involved the use of conventional processing equipment that held relatively large amounts of materials in relatively large reactor vessels. If the reactions being performed were highly exothermic, the possibility of runaway reactions leading to fires or explosions was high. The primary reason for this was the inability to extract the heat generated by the reaction due to the large ratio of the material volume to surface area of the chamber walls. This could cause difficulty in controlling temperature and other process conditions, detrimentally affecting the chemical process. For example, in conventional tank reactors where temperatures at the reactor walls could be well-controlled, the portions of reactants away from the walls might experience different temperature ranges; this could negatively affect the reaction, generating undesirable by-products and waste materials and increasing the potential for dangerous adverse reactions. But if the surface area was increased dramatically in relation to the amount of material used, temperature can be more precisely controlled so that the success of the process would be increased substantially. To do this required rethinking how reactors are designed.

DuPont has tackled the problem and come up with this technology: the advanced microreactor. With an average size no larger than a hockey puck, DuPontĀ“s microreactor is fabricated from layers of wafer-like disks with precise interior channels formed on the disk surfaces to contain the reactions. Each microreactor is an integrated system designed to perform a specific process including mixing, heat exchange, catalysis, reaction, photoreaction, electrochemical, separation, and analysis/control of reactions involving gases, liquids, as well as multiphases.

The materials used for the layers are determined by the chemical processes to be performed, but are generally from groups III, IV, and V of the Periodic Table, including ceramics, glasses, polymers, composites, and metals. The channels within these layers -- measuring a mere 10 to 5000 micrometers across and connected to the inlet and outlet ports -- are formed by any number of techniques depending on the material used: chemical etching, electrochemical machining, laser machining, electroforming, selective plating, chemical vapor deposition, photoforming, molding, casting, and stamping.

Safety, Versatility Are Major Benefits

Among the many benefits derived from microreactors, safety is a major one. Chemicals that are dangerous to manufacture, handle, ship, or store can be produced in small quantities on-site, as needed. Many processes require fast mixing of reactants, which can be difficult to achieve with large volumes of materials. Microreactors promote faster mixing through their small-diameter channels, which also prohibit flame propagation which can lead to explosions. Rapid mixing facilitates better kinetic reaction data, enabling better and faster optimization of conventional production reactors.

The very nature of the microreactors makes them versatile and relatively inexpensive to use. Their small size requires small amounts of reactants while the laminae used to construct the reactors can be held together by a variety of methods, including epoxies, soldering, welding, even clamping.

The relatively large surface areas in the reactors enables a wide range of controls to be incorporated in the devices, including temperature, pressure, and pH sensors, heating elements, flowmeters, and other instrumentation. The size and versatility of these microreactors make them ideal for lab bench processes as well as volume production in which dozens, even hundreds, of devices can be operated in parallel to produce potentially millions of pounds of chemicals a year.

Want to see more? Tech of the Week is special. Click View Listing Details to see the full information on this technology -- even if you're not already a member.
Want to know more? will confidentially pass your question along to the provider of this technology and get back to you with an answer if it is available. This service is free. Ask the owner a question
Like an introduction? Deal directly with the licensing contact for this technology. You´ll need to provide some minimal information. This service is confidential and free of charge unless noted. Request an introduction
Send an email to a friend or colleague that contains a link to this technology. Email this listing to a friend
Boston, MA, USA       Liverpool, United Kingdom       Tokyo, Japan                  
Find a Technology |  List a Technology |  Insight |  Using this Site |  About Us |  Home |  Customer Support |  Help
Privacy Statement   |   Terms of Use Agreement   |   Technology Abstracts
Copyright © 1999-2015 by, Inc. All Rights Reserved.