pentane

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pentane

(pĕn′tān)
C5H12; one of the hydrocarbons of the methane series. It is a product of petroleum distillation.
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In the second half of 2011, US stocks of pentanes plus surged to over 17.
The sudden increase in availability of light hydrocarbons like pentane (which has five carbon atoms) and hexane (six carbon atoms) has crushed refining margins for light naphtha in North America, and added to downward pressure on the naphtha market worldwide.
For trailers, Bayer found that HFC-134a, HFC-245fa, and an 80/20 cyclo/iso pentane blend each can produce foam properties comparable to HCFC-22.
The heavier hydrocarbon gas liquids like the butanes, pentanes and higher compounds are used in a variety of markets.
Still, industry sources maintain that significant conversion already has taken place in this sector, primarily to pentanes, although HFC-245fa is also a candidate.
Working with some major polyol and surfactant suppliers, the company sees potential in other rigid foam sectors, such as replacement of pentanes in boardstock; in spray foams, where the cost of HFC-245fa is a concern; and perhaps even in the more conservative appliance sector.
Zero-ODP, zero-GWP Ecomate blowing agent is priced in the same range as pentanes.
At the recent Polyurethanes Conference 2004 in Las Vegas, sponsored by the Alliance for the Polyurethanes Industry (API), a major share of the technical presentations addressed rigid PUR foams blown with HFC-245fa, HFC-134a, and pentane.
Neither HFC-245fa nor pentanes alone can offer both the physical properties and low cost of HCFC-141b, which sells for $1.
However, there have been significant strides toward matching or exceeding the performance of HCFC-141b at comparable cost through blending HFC145fa with water or pentane and using new polyol formulations.
Measured at 0[degrees]C, the improvement ranged from 4% to 12%, depending on the type of pentanes compared.
In Dallas, ICI Polyurethanes reported on its most recent study of hydrocarbons, which shows that blends of pentanes can produce rigid polyisocyanurate foams with fire performance similar to foams made with HCFC-141b.