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Molecular Sieve Adsorbents Zeochem Molecular Sieve Adsorbents Adsorption Technologies: our work – our life – our passion. Molecular Sieve Adsorbents Zeochem Molecular Sieve Adsorbents Zeochem, a manufacturer Zeochem is a subsidiary of the Swiss of high quality molecular sieves CPH Chemie+Papier Holding AG. and chromatography gels, was With manufacturing facilities in established more than 190 years Uetikon, Switzerland and Louisville, ago and its headquarters is still USA, Zeochem provides coordinated based at the original location global support to all molecular sieve on Lake Zurich, Switzerland. adsorbent markets. Molecular sieve adsorbents are crys- high loading, even at very low con- talline alumino-silicates known as centrations of the contaminants. zeolites. Their unique structure allows Molecular sieves can therefore remove the water of crystallization to be many gas or liquid impurities to very removed, leaving a porous crystalline low levels (ppm or less). structure. These pores or „cages“ have a high affinity to re-adsorb water or Another feature of molecular sieve other polar molecules. adsorbents is their ability to separate Aided by strong ionic forces (electro- gases or liquids by molecular size or static fields) due to the presence polarity. The pore or „cage“ openings of cations such as sodium, calcium are of the same size as a range of and potassium and by the absolutely different molecules; for example, in enormous internal surface area of the case of hydrocarbon paraffins, the close to 1‘000 m2/g, molecular sieves normal, straight-chained molecules will adsorb a considerable amount can fit into the pores and be adsorbed, of water or other compounds. while the branched molecules cannot If the fluid to be adsorbed is a polar enter the pores and pass through the compound, it can be adsorbed with molecular sieve bed un-adsorbed. Molecular Sieves Zeochem Molecular Sieve Adsorbents Types of Molecular Sieves Zeochem manufactures a wide range Type 13X: of zeolites used as molecular sieve The sodium form of zeolite X has a adsorbents. Some of the more much larger pore opening than the common types of molecular sieves Type A crystals. It also has the highest and some typical applications include theoretical capacity of the common the following: adsorbents and very good mass transfer rates. Type 13X removes Type 3A: impurities too large to fit into the Type Will exclude most molecules except A zeolites and is also often used to water. Type 3A is used for drying natural separate nitrogen from air to produce gas, ethanol and reactive monomers a high purity oxygen stream. such as olefins etc. Type 3A is usually made by ion-exchanging potassium Type Y: onto Type 4A in place of sodium. Similar in structure to the Type X, Type Y has a higher silica to alumina ratio, Type 4A: offering some improved adsorption of The sodium form of Type A is widely hydrophobic compounds and impar- used as a general purpose drying agent. ting some acid resistance. Under certain conditions it can also be used for removal of carbon dioxide. Pentasil: Pentasil is also known as Zeolite MFI Type 5A: or ZSM-5. A high silica/alumina ratio This is the calcium-exchanged form makes this family hydrophobic of the Type A zeolite. The strong ionic and an excellent choice to adsorb forces of the divalent calcium cation selectively organic impurities from make 5A an excellent choice for aqueous liquids or from water-laden removing carbon dioxide, carbon gas streams such as air. monoxide, hydrogen sulphide and other weakly polar molecules. This Mordenite: product is also effective for the bulk This zeolite is a highly acid resistant separation of normal and iso-paraffin adsorbent or catalyst carrier. hydrocarbons. Molecular Sieves Zeochem Molecular Sieve Applications Applications Process Industry Applications Natural Gas Processing Industrial Gases Dehydration of natural gas and Dehydration and CO2 removal from natural gas liquids such as propane air for cryogenic processing and butane Separation of high-purity oxygen Removal of CO2, H2S, mercaptans from air via Pressure Swing and other impurities from natural gas Adsorption (PSA) or Vacuum Swing or natural gas liquids Adsorption (VSA) Recovery of inert gases by adsorption Hydrogen Production or Recovery Drying and purification of 2H using Petroleum Refining either thermal swing or pressure Dehydration of light-ends (e.g. olefin) swing adsorption for cryogenic recovery Purification of feed to catalytic Basic Petrochemical and Synthesis processes such as isomerization, Gas Processes dimerization and alkylation units Purification of natural gas feed Drying and purification of the Chemical Storage reformer gas prior to the ammonia Underground cavern drying and loop treating Treating of ammonia off-gas streams Storage tank breathers Olefin and polyolefin production Product recovery from vent streams Drying of cracked olefin gas, ethylene and propylene products Fuel Ethanol Production Dehydration and purification of Bulk water removal at the azeotrope ethane feed to the cracker Purification of food- and pharma- Impurity removal from polyolefin ceutical-grade ethanol plant feed (catalyst protection from oxygenates, sulfides) Miscellaneous Petrochemicals Drying of solvents Purification of feed streams to catalytic processes such as for ethyl benzene Zeochem Molecular Sieve Applications Industrial Applications Insulating Glass Systems Protection Devices Prevention of condensation in the Dehydration and filtration insulating glass space of windows of refrigerant loops Dehydration and purification Package Protection of compressed breathing air Dehydration and trace contamination Dehydration of compressed air removal in enclosed spaces for pneumatic tools Removal of odors Truck and railroad air brake driers Pollution and VOC Control Medical Uses Containment and concentration Oxygen concentrators for of solvent vapors respiratory therapy Polymer Processing Removal of water of reaction in urethane formulations Cell size control in blown foams Plastic pellet driers prior to blow- or injection-molding Zeochem Quality Research & Development Since its foundation, Zeochem has Zeochem R&D efforts have been re- development projects together been at the leading edge of molecular warded in recent years with numerous with customers. Well-equipped sieve technology. patents on zeolite manufacture and laboratories and pilot facilities applications. support our researchers, who Zeochem R&D developed an ultra- also have close relationships stable molecular sieve able to These examples of unilateral product with numerous universities withstand thousands of thermal and process development are mirrored and private laboratories with regenerations with delayed decay by Zeochem’s R&D focus on real-world their own specialized facilities and exceptional capacity retention. applications and participation in joint and expertise. Technical Service Zeochem employs technical service forward, Zeochem can review the Of increasing importance is the engineers and scientists who have detailed designs and procedures. training Zeochem can provide years of experience in adsorber design, In the end phase Zeochem offers to customer‘s engineers, super- operation and maintenance. consultation on last-minute change visors and operators. Zeochem’s orders and start-up assistance, when expertise in the field has been From the beginning of each project, the unit is to be commissioned. recognized and demonstrated Zeochem’s technical service engineers Follow-up service is available for the world over in seminars, can provide conceptual advice and troubleshooting and performance conferences, papers and indi- design support. As the project moves optimization. vidual presentations. Manufacturing Zeochem’s proprietary manufacturing specifications, but also to have in and manufacturing capabilities processes utilize the latest processing place extensive quality systems geared including toll manufacturing, equipment and computerized process towards continuous improvement of regeneration of spent product control systems. their products and processes. and custom manufacturing. Special efforts have been made to instrument, monitor and control all We demand that of ourselves and This continuous improvement phases of manufacturing. extend that expectation to our allows Zeochem to meet the Vendors are required not just to meet suppliers. Zeochem continues to challenges of the 21st century. Zeochem’s stringent raw material upgrade and expand our processes Zeochem Quality Quality & Environment Quality control Safety All finished products are analyzed Zeochem conforms to all the require- and certified against specifications ments imposed by existing legislative by our quality control lab, which is regulations in order to guarantee the independent of the manufacturing safety and health of our employees, operation. Zeochem uses test methods with particular consideration for according to international norms and the safety regulations of the Federal has also developed proprietary test Coordination Commission for Occu- procedures specific to customer app- pational Safety (FCOS) and the US lications to ensure that Zeochem’s Occupational Safety and Health products give the expected perfor- Administration (OSHA). Zeochem mance. operates in accordance with all applicable regulations and provides We are in compliance with the regular training and health advice standard of international quality to all its employees. system boards (ISO 9001) and with those of scores of critical customers Environment in demanding industries. Zeochem meets or exceeds all requirements set by the Swiss and US authorities and regards the careful use of natural resources and safe production processes, as well as ensuring minimal pollution, among its critical goals. Our company is a member of the Swiss Private Sector Energy Agency and is committed to the principles of “Responsible Care”. Zeochem AG Seestrasse 108 · 8707 Uetikon am See · Switzerland Phone +41 44 922 93 93 · Fax +41 44 920 20 93 [email protected] · www.zeochem.com Zeochem L.L.C. 1600 West Hill Street · Louisville, KY 40210 · USA Phone +1 502 634 7600 · Fax +1 502 634 8133 A Company of [email protected] · www.zeochem.com Chemie + Papier Holding AG For your local agent or distributor please go to www.zeochem.com.
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