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HOUSTON (ICIS)--The price spread between US                    spot benzene and spot toluene widened this                    week, ICIS analysis showed on Friday.

For the week of 20 December spot benzene was                    valued at 19 cents/gal more than spot toluene,                    compared with 4.75 cents/gal                    the prior week.

Toluene is used to produce on-purpose benzene                    through conversion units. Historically, a wide                    spread between the two aromatics, which favours                    benzene, has encouraged toluene conversion to                    benzene.

A marginal spread between toluene and benzene                    has kept conversion-unit economics quiet as of                    late, although some players comment that a                    spread of 20 cents/gal or more will encourage                    higher run rates at conversion units.

The spread rose quickly this month and                    currently stands closer to the mid-September                    2019 level, according to ICIS data.

US spot benzene prices for the week ended 20                    December moved higher with stronger demand and                    crude prices.

In contrast,                    spot toluene prices for the week                    moved lower on weakening demand.