Raschig GmbH / Raschig USA, Inc. articles

Background - Water Chemistry Controls the Design
A common method to adjust pH of water - typically well water intended for potable use - is to pass the water through a packed tower. Such towers intended to degas the water was also commonly called `air strippers`. This is because the water is passed down over a bed of `packing1 as air is blown into the bottom of the tower to pass up and out of the tower.

Note: as a result the water and air pass each other `counter

The crude oil distillation unit (CDU) is the first processing unit in virtually all petroleum refineries. The CDU distills the incoming crude oil into various fractions of different boiling ranges, each of which are then processed further in the other refinery processing units. The CDU is often referred to as the atmospheric distillation unitbecause it operates at slightly above atmospheric pressure.

H2S / Sewer Gas / Rotten Egg Smell Control
Hydrogen Sulfide, chemical formula H2S. also commonly referred to as `sewer gas` is frequently a nuisance problem at waste water treatment facilities - and a source of complaints from neighbors of such facilities.

Additionally, H2S not only stinks, at high concentrations it incapacitates, blinds and eventually will kill if allowed to concentrate fiulher. And as it is heavier than air. if not controlled it can under pr

Abstract: Raschig Super-Pak is a novel development in structured packing product technology that is fundamentally different to the well known corrugated perforated or non-perforated, textured sheet metal structured packings. It comprises of a systematic sequence of smooth sinusoidal waves above and below the plain of the metal sheet. Tests at the Ruhr University of Bochum showed that the new open structure resulted in very high capacities low pressure drops and excellent mass

Full scale testing and analysis of operation demonstrate the importance of tower internals on the performance of mass transfer packings

Fractionation Research Inc. (FRI) is the most modern independent test institute in the world for performing tray, random packing, and structured packing tests under rectification conditions on an industrial scale test column (see Figure 1). In 1998, Raschig Super- Ring No. 2 was tested at FRI for the first time, and FRI high performance tower inter

Radon is Frequently Found in Ground Water
Radon, symbol Rn, atomic number 86, is a colorless, odorless gas at ambient conditions. It is the heaviest element of the Noble Gas family. As such it is extremely stable and unreactive chemically. But it also is highly radioactive. Its half-life is only 3.8 days. Both Thorium, symbol Th, atomic number 90 and Uranium, symbol U, atomic number 92, have no stable isotopes. So both are radioactive but only weakly so. They decay by re

The overall tower performance is influenced by the type of both tower internals and random packing. The Raschig GmbH`s most recent development is the Raschig Super-Ring®, the fourth generation of random packings. In 1998, the Raschig Super-Ring No. 2 was tested at the facilities of Fractional Research Inc. A significantly improved capacity and pressure drop over other random packing was observed without reducing the efficiency. A recent retesting of Raschig Super-Ring No.2 using new tower

Since university research on mass transfer columns has decreased significantly in recent years, it is discussed whether the current knowledge of mass transfer technology for trays, packing materials, and column internals is sufficient to design energy- and cost-efficient systems. Points of view are described that have not yet been clarified from an industrial position and should play an important role in future research. In addition to the thermodynamics of industrially relevant systems, an i

Chlorine Dioxide - CIO2 Scrubber Packing at Kraft Pulp Mills

Elemental Chlorine Free - ECF - bleaching of wood pulp using Chlorine Dioxide, CIO2, as the primary bleaching agent eliminates dioxin emissions. This is a reflection of the fact that as a bleaching agent CIO2 is 10 times more reactive than elemental Chlorine, Ck. As a powerful oxidizing agent CIO2 must be generated on site - it is too dangerous to transport by either rail or highway. Approximately 90% of

Abstract

Normal expectations in operating amine treating plants for acid gas removal is that small changes in operating conditions will result in correspondingly small responses in plant performance. However, such expectations are not always well founded. To establish credibility for the process simulator used in the design of a new LNG plant (ProTreat ), we begin by comparing its mass transfer rate-based simulation results with performance data from an LNG plant o