Articles

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  • Improve control loop performance

    Specification of control valves doesn’t adequately emphasize the very basic requirement that valve position respond in a timely manner or even at all — leading to process variability.

    Gregory K. McMillan, Emerson Process Management
    10/18/2007
  • Rethink your approach to process safety

    Place more emphasis on avoiding hazards rather than just controlling them. Process risk reduction can involve limiting the likelihood of potential accidents or cutting their consequences.

    Dennis C. Hendershot, Chilworth Technology Inc.
    09/11/2007
  • Two bulk conveyors prove better than one

    Engineers at EaglePicher Corp. in Quapak, Okla., faced some unique problems in manufacturing high-purity isotopic chemicals and wound up addressing them via a unique solution.

    David Boger, Flexicon Corp.
    07/11/2007
  • Plant to enterprise – Putting the pieces together

    While improved technology has narrowed the gap, the pressure now is on to complete the plant-floor-to-top-floor link. But the path is a twisty one dogged by complex technical and cultural issues.

    Nancy Bartels, Managing Editor
    03/30/2007
  • Equipment & Services: March

    Chemical Processing's Equipment & Services feature provides a variety of production equipment, supplier services and parts.

    03/28/2007
  • pH sensor stands up to tough conditions

    Design provides improved reliability in a polymer-precursor batch reactor. Sensors must respond quickly and survive a harsh environment. Poor probe reliability can make the difference between a process that makes money and one that doesn’t.

    Kyle Becker, Polychemie
    01/08/2007
  • Heat integration steps can present control problems

    The more energy prices rise, the more heat integration saves. However, heat integration steps can present complex control problems. Slip-ups in putting control systems in place can make operations nearly impossible. That certainly was the case at one unit using heat recovery.

    Andrew Sloley, contributing editor and Carolyn K. Hawley, VECO USA
    09/13/2006
  • Innovations in batching, dosing and weighing

    Challenges brought on by new regulations and technical problems for batching, dosing and weighing have pushed users to find some innovative and surprising solutions beyond our own industry.

    09/05/2006
  • Try before you buy

    There is another side to toll processing. It involves the companies that arguably have the best possible know-how and hardware — for the simple reason that they are the equipment manufacturers themselves, offering toll processing services that utilize their own products.

    Mike Spear, editor at large
    07/24/2006
  • Control your maintenance

    Automation systems have now reached such a high degree of reliability that many personnel at plants now take them for granted. Learn to use digital communication with your asset management tools to achieve predictive maintenance and substantial savings.

    Ian Verhappen, MTL Instruments Group
    07/12/2006
  • Don’t let phase changes faze you

    Phase changes in the downstream processing or handling of solids cause many process problems that have inexpensive solutions.

    Tom Blackwood, Healthsite Associates LLC
    10/04/2005
  • Keep cool when designing batch reactors

    The stirred batch reactor is a workhorse at many plants. In designing such a unit, focus on effective temperature control to achieve optimum performance.

    John Edwards
    09/28/2005
  • Can you safely grandfather your SIS?

    Making a claim that an existing safety instrumented system satisfies a new ANSI standard should not be taken lightly. Before doing so, it is essential to assess several critical factors.

    Angela E. Summers, SIS-TECH Solutions, LP
    08/11/2005
  • Getting batch material transfers under control

    Batch material transfer control seems an easy task to carry out, but the reality is that many functions are necessary if the system is to accomplish accurate batch material transfer control. Weighing systems with device-level controls can help.

    08/10/2005
  • Efficient batch control

    Efficient batch control can be both an art and science, so act accordingly for best results, and always remember "it's survival of the fittest" out there.

    07/13/2005
  • World Batch Forum North American Conference nearing

    This year’s conference will feature 18 speakers, as well as panel discussions covering a wide range of topics of interest to automation users and suppliers, including ISA88 and ISA95. Keynote speakers will be Dave Beckmann and Ian Nimmo, both long-time veterans of the process control industry.

    04/12/2005
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