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PAG lubricants are used by the two largest U.S. air compressor OEMs in rotary screw air compressors. [7] PAG oils of different viscosity grades (usually either ISO VG 46 or ISO VG 100) are often used as compressor lubricants for automotive air conditioning systems employing low global warming potential refrigerants.
Chemically it is a polyether, and, more generally speaking, it's a polyalkylene glycol (PAG) H S Code 3907.2000. The term polypropylene glycol or PPG is reserved for polymer of low- to medium-range molar mass when the nature of the end-group , which is usually a hydroxyl group, still matters.
Polyolester oil (POE oil) is a type of wax-free synthetic oils used in refrigeration compressors that is compatible with the refrigerants R-134a, R-410A, and R-12. [1] POE oils are used as a lubricant in systems using the refrigerant HFC-134a when replacing CFC-12 , as these systems traditionally use mineral oil , [ 2 ] which HFC-134a does not ...
Penske Automotive Group (PAG) is a transportation services company headquartered in Bloomfield Hills, Michigan.It operates automotive and commercial truck dealers principally in the United States, Canada, and Western Europe, and distributes commercial vehicles, engines, power systems, and related parts and services principally in Australia and New Zealand.
[45] [46] Most current motor-oil lubricants contain petroleum base stocks, which are toxic to the environment and difficult to dispose of after use. [47] Over 40% of the pollution in America's waterways is from used motor oil. [48]
Pentaerythritol was first reported in 1891 by German chemist Bernhard Tollens and his student P. Wigand. [5] It may be prepared via a base-catalyzed multiple-addition reaction between acetaldehyde and 3 equivalents of formaldehyde to give pentaerythrose (CAS: 3818-32-4), followed by a Cannizzaro reaction with a fourth equivalent of formaldehyde to give the final product plus formate ion.
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