US refinery grade propylene contracts settled at 47.5 cents/lb FD USG,market sources confirmed July 28,up 4.25 cents from July's contract price.The increase was not a surprise,as spot RG propylene prices traded as high as 48.125 cents/lb FD USG July 27.The increase was the exact amount that the July contract fell,4.5 cents/1b.
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