Cooling ethylene-propylene

The following information was used in olefin plant case studies to determine if the ethylene/propylene cascaded refrigeration systems had enough horsepower for various plant operations. The propylene was condensed against cooling water at 110°F and the ethylene was condensed against propylene at -20°F. For comparison, the horsepower requirements for each refrigerant alone are also shown. 

FIGURE 30.18 Ethylene-propylene-diene monomer (EPDM) compounding quarter cycle integration ratio versus strain, at 0.5 and 1.0 Hz samples at position TR (at dump), EM (after curatives addition), and AG (after cooling). 

Afterwards, the PP powder is fluidized by a mixture of ethylene, propylene and inert gas (propane) in the fluid bed reactor, FBR, which is cooled by convective gas flow. The monomer conversion per gas circulation is limited to a few percent, because of the adiabatic temperature rise of more than 10 K per % conversion. Neglecting the heat loss through the reactor wall and through the product withdrawal, and assuming a well mixed reactor, the heat removal capacity of a steady-state FBR limits the productivity and can be expressed by... 

The butene-1 is mixed with butene recycle from the autometathesis recovery section and is vaporized, preheated and fed to the autometathesis reactor (3) where butene-1 reacts with itself to form hexene-3 and ethylene over a fixed bed of proprietary metathesis catalyst. Some propylene and pentene are also formed from the reaction of butene-2 in the butene-1 feed. Reactor effluent is cooled and flows to the autometathesis recovery section (4), where two fractionation columns separate it into a hexene-3 product that flows to the hexene isomerization unit (5), an ethylene/propylene mix, and butene-1 that is recycled to the butene... 

Kellogg Brown Root LLC Ethylene, SUPERELEX Hydrocarbon feedstock Selective Cracking Optimum Recovery (SCORE) pyrolysis furnace cracks the feed hydrocarbon in the presence of dilution steam into large amounts of ethylene, propylene and byproducts. Furnace effluent is cooled by generating steam and quenched further to remove heavy gasoline, fuel oil and dilution steam 172 NA... 

Ethylene-Propylene-Diene-Monomer (EPDM) Rubber. The main properties of EPDM are its outstanding heat, ozone and weather resistance, as well as its electrical insulating properties. EPDM rubber finds use in vehicles (weather seals in windows and trunks, cooling system hoses), in safety equipment (seals in respirators), roofing (waterproofing of roofs), and playground surfacing. 

Figure 2, Crystallization of a homogenous ethylene-propylene copolymer by cooling (top) at 1 and 150 C/min and subsequent melting (bottom) by heating at 150 °C/min [27].

A series of ethylene-propylene block copolymers prepared with " C-labelled ethylene was analysed for percentage of ethylene incorporation by radiochemical methods. These samples when scanned at 180 °C gave results that agreed with the radiochemical assay quite well. However, when the cooled samples were scanned, the results from the cold calibration were low in comparison with the known ethylene content. These data are shown in Table 3.1. 

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