Making an accurate level measurement in the gas phase reactor at any polyethylene or polypropylene plant is one of the most important and challenging tasks because of the varying density of the material inside. This paper compares the most common methods used to measure level in the gas phase reactor.03/13/2019
Some companies think that their problems relate to mixing. In most cases, the difficulties result from not paying enough attention to the process and, sometimes, just from inadequate attention to the details. The results can be disastrous.
To help avoid mishaps, Chemical Processing has put together an eHandbook. It includes insight on:
- Stop Inconsistent Mixing – A range of factors can contribute to erratic performance.
- Get Educated On The Basics Of Particle Size Reduction – Proper methodology depends on solid materials and their properties.
- Consider Agitated Photo Reactors For Industrial Synthesis – Technology can help lower reaction temperatures and reduce byproducts.
- Prepare For Industry 4.0 – Integrated, holistic, smart operations help manufacturers gain a competitive edge.
The nature of batch operations poses unique problems. Ensuring reagent chemicals are added at the optimal time so as not to cause a temperature change is crucial. Additionally, there are several questions you must ask in order to properly bridge your batch operations and continuous ones. Topping it all off, you must improve energy efficiency.
To help you do a whiz-bang job on your batch processing, Chemical Processing has put together an eHandbook. It includes insight on:
- Quickly Estimate Reagent Addition Time -- A simple equation suffices in many situations involving batch reactors.
- Bridge Batch And Continuous Operations Better -- Developing an accurate timeline can lead to important insights.
- Improve Energy Efficiency Of Batch Processes -- Such processes often offer substantial opportunities for savings.
Chemical and pharmaceutical processes involve reactions/precipitations to produce a slurry. The valuable material may be the liquid, the solid, or both. The first step after the reaction is a bulk separation process that removes large, coarse solids. This is relatively straightforward, but as processes have become more sophisticated and quality requirements have tightened, it is necessary to remove residual particle fines from slurries. These particles are small — typically 1–5 μm in diameter, or even smaller — and at low concentrations, on the order of parts per million (ppm). This article describes a new approach to clarification for replacing bag and cartridge filters, filter presses as well as conventional manual separation equipment.03/21/2017
This Chemical Processing eHandbook examines some of today’s Refining challenges and solutions for chemical manufacturers.
Download this Chemical Processing eHandbook for insights and solutions including:
- Use Elegant Design to Bolster Inherent Safety: Embrace a variety of strategies that can eliminate hazards from operations.
- Refinery Tackles Water Issues: Skid-mounted treatment unit improves water quality and cuts costs.
- Minimize Oil and Gas Refinery Downtime: Coordinate shutdown and turnaround logistics with operational planning tools.
- Take a Closer Look at Above-Grade Pump Stations: Technology offers safer, more-efficient wastewater and stormwater pumping.
Failure of a pressure instrument due to corrosion can lead to the expulsion of volatile liquids and gases into the surrounding environment. Understanding the causes of corrosion and preventative measures is crucial to operators. To help counter this threat, valuable information is available from dedicated organizations. Learn about these resources and gain the insight you’ll need to protect your people, processes and profits. Download now.10/13/2015
Precious metals are often present in hydrocarbon, petrochemical, and chemical catalysts. Techniques for recovering precious metals have been around for many years; yet many catalyst owners have misconceptions about how their refining organizations work. In "The Five Myths of Refining Precious Metals", critical information is shared about the chemical processing industry:
- Crucial aspects of weighing
- Sampling and analysis of catalysts
- Methods of catalyst recovery
- What to look for in a proposal from a precious metals refiner
- Understanding the cost of quality
- How to ensure maximum precious metals return value
- Environmental, ethical, and regulatory compliance issues
Most chemical processors use precious-metal-bearing catalysts for facilitating and/or speeding chemical reactions. These catalysts are typically composed of platinum group metals (PGMs). After a number of process cycles the catalysts lose their efficacy and must be replaced with fresh catalysts. Spent catalysts are sent to a precious-metals refiner for recovery and refining of the valuable PGMs remaining in this material. Selecting—and working with—a precious-metals refiner is critical to ensure highest possible returns and peace of mind with regard to environmental concerns. Download and read this 22-page white paper to learn more about recovering precious metals from spent catalysts.01/28/2013
Many catalytic reactions rely on platinum, palladium and other precious metal catalysts. When the activity of the catalyst declines to the point that it must be replaced, the used catalyst can be sent to a refiner to recover precious metal. This 8-page paper discusses the variouis factors that should be considered when using a refiner.10/15/2004
This paper covers key aspects for modeling and design of batch reactors, including: heat-up and cool-down performance, sensitivity analysis for reactor parameters, boil-up rate predictions, thermal stability under exothermic conditions, control system design and loop tuning parameters, condenser rating, and process emissions predictions.10/15/2004
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