Lyondell Chemical ( LYO) reported a 27% rise in second-quarter profits, helped by its refining segment. The Houston-based company earned $160 million, or 62 cents a share, in the quarter, compared with $126 million, or 48 cents a share, a year ago. Analysts surveyed by Thomson First Call were expecting earnings of 76 cents a share in the quarter. Second-quarter revenue rose 15.9% to $5.07 billion as against analysts' expectation of $4.96 billion. "The strong ethylene chain performance realized late in the second quarter is expected to continue into the third quarter. Thus far, propylene oxide chain results have been good and refining and gasoline components have continued to be strong", the company said. Shares fell $1.13 to $21.24.