Many of these are not produced in all petroleum refineries.

The community is home to a major Shell petroleum refinery.

Since their introduction in 1979, over 30 systems have been installed at petroleum refineries worldwide.

Petroleum refineries run as efficiently as possible to reduce costs.

Continuous operation is more efficient in many large scale operations like petroleum refineries.

The major source of ethylbenzene in drinking water is discharge from petroleum refineries.

It has also a non-working petroleum refinery, out of order since the Lebanese civil war.

Petroleum refineries also have very large cooling tower systems.

Petroleum refineries are being built in the area.

The town is also the site of a petroleum refinery, a fertilizer plant, and seafood-processing plants.

It contains an industrial zone that has many large factories and petroleum refineries.

A petroleum refinery and storage installation is situated there.

Here, farmland has been replaced by petroleum refineries, food processing plants and other factories.

A petroleum refinery includes many unit operations and unit processes.

Alkylation unit, is one of the conversion processes used in the petroleum refineries.

"Over half of the petroleum refineries are located in just four states," Professor Zimmerman said.

Apart from tea and petroleum refineries, Assam has few industries of significance.

The quake sparked a disastrous fire at the Tüpraş petroleum refinery.

The Wood River petroleum refinery continues to operate on a reduced scale.

At the age of 27 Lemberanskiy was assigned director of petroleum refinery.

In the 1920s a petroleum refinery was opened at the port of San Nicolaas.

One important industry that is located here is that of petroleum refinery.

Their customer base also includes a variety of industry including utility companies, food-processing plants, petroleum refineries.

Other mineral exports included petroleum refinery products and alumina.

Proximity of oil deposits, petroleum refineries and cotton storehouses to the sea was the reason for it.