Catalyst carrier coating

Among the non-traditional routes for formation of catalyst and catalyst/carrier coatings, the most prominent way is the washcoat route followed by wet impregna-... 

Catalyst Carrier Coating Inside Bonded Reactors... 

Laser cutting of catalyst carrier coated foils... 

Figure 2.66 Cross-section of a micro channel coated with a catalyst layer (left) (source INM, Saarbrucken, Germany) and typical surface morphology of wash-coat catalyst carriers (right).

In particular the recent investigation as part of the project Smart Sol-vents/Smart ligands of the SLPC with PEG and ionic Hquids ( SILP ) as the catalyst carrier opened up new possibihties for the immobihzation of homogeneous catalysts. By increasing the stabihty of the catalytic performance, this concept may have the potential to be kept in mind for industrial catalysis in combination with environmentally benign supercritical or compressed carbon dioxide. In addition, this methodology is able to provide access to some chemical applications and processes because of the easy and facile preparation of the coated materials. 

Uses Solvent in nitrocellulose coatings, vinyl films and Glyptal resins paint removers cements and adhesives organic synthesis manufacture of smokeless powders and colorless synthetic resins preparation of 2-butanol, butane, and amines cleaning fluids printing catalyst carrier acrylic coatings. 

Other significant uses of PCBs included heat exchangers and hydraulic fluids. Prior to controls PCBs were also used in adhesives, coatings, plasticizers and inks for microencapsulating dyes for carbonless duplicating paper as extenders in pesticide formulations and catalyst carriers in olefin polymerizations to impart hydrophobicity to materials and surfaces in bactericide formulations (combined with insecticides), and in immersion oil for microscopes. Mixed with chloronaphthalenes, PCBs were also used in wire and cable insulation in the mine and shipbuilding industries (ref. 80, p. 455). 

In order to improve the filling of the pores of the alumina layer (for manufacturing details, see Section 2.10) with catalytically active substances, the samples were evacuated in an desiccator and conditioned with carbon dioxide, which is water soluble in contrast to air. If this procedure was successful, then the so preconditioned y-alumina layers were dip-coated with a solution of salts of transition metals. Another possibility is to impregnate the catalyst carrier by applying solutions of catalytically active substance subsequently drop by drop with a dispenser. 

The great drawback of organic materials for practical use, especially at elevated temperatures, is their inherent instability, thermal as well as mechanical. On the other hand great advances have been made in polymer technology. Composite plastics are used in the construction of supersonic airplanes to replace metals, because of their superior resistance to heat, and plastic coatings are frequently used to enhance the chemical resistance of surfaces. Therefore it is not improbable that properly synthesized organic materials may also find their practical application as catalysts or catalyst carriers. 

Experiments in a pilot-scale plant demonstrated the feasibility of applying coated monoliths and DX packings or katapak-S successfully as catalyst carriers in reactive stripping. It was proven that the water removal increases the catalyst activity and permits a shift" in the equilibrium. In accordance with the kinetics of this... 

The potential of structured packings as catalyst carriers for reactive stripping, film-flow-monoliths, Sulzer DX -packings, both coated with zeolite BEA, and katapak-S , filled with BEA-particles, was explored in cold-flow experiments and under reactive stripping conditions in a pilot-scale plant. 

The most common oil hydrogenation catalysts are 20-25% Ni on A1203 and Si02. The nickel salts are either impregnated or co-gelled with a carrier precursor such as a soluble A1 or Si salt. The catalytically active state of Ni is the reduced (metallic) form. The activation step is performed during manufacture at which time the catalyst is coated with a fatty gel to protect it from air oxidation during shipment. 

Use Filtration clarifying and decolorizing insulation absorbent mild abrasive drilling-mud thickener extender in paints, rubber, and plastic products ceramics paper coating anticaking agent in fertilizers asphalt compositions chromatography refractories acid-proof liners catalyst carrier. 

Use Filler and coatings for paper and rubber, refractories, ceramics, cements, fertilizers, chemicals (especially aluminum sulfate), catalyst carrier, anticaking preparations, cosmetics, insecticides, paint, source of alumina, adsorbent for clarification of liquids, electrical insulators. 

Use Solvent in nitrocellulose coatings and vinyl films, Glyptal resins, paint removers, cements and adhesives, organic synthesis, manufacture of smokeless powder, cleaning fluids, printing, catalyst carrier, acrylic coatings. 

A very round particle is produced if the end use dictates the need for this shape, for example for uniform coating in the pharmaceutical industry or well defined fixed bed packing of catalyst carriers. 

Chem. Descrip. Wh. mineral oil DSP CAS 8042-47-5 EINECS/ELINCS 232-384-2 Uses Plasticizer for ethyl cellulose base in cosmetics (creams, lotions, sunscreens), pharmaceuticals (laxatives), foods (lubes/greases, food pkg.), plastics (lubes for PS, PVC, annealing, catalyst carriers), adhesives protective coating on foods... 

Chem. Descrp. Alumina CAS 1344-28-1 EINECS/ELINCS 215-691-6 Uses Flow aid, anticaking agent for powd. coatings aids in reducing electrostatic charges of powder substances tor personai care and elec, industry antistat tor PVC powd. improves light diffusion in fluorescent tubes in prod, of catalyst carriers which are coated with metais Properties Wh. fluffy powd., odorless 13 nm avg. particle size insol. in water dens. = 50 (tapped). surf, area 100 nr/g m.p. > 1800 C pH 4.5-5.5 (4% aq. disp.) > 99.6 assay... 

---