III. Answer the questions

1. What is the primary refinery process?

2. What physical separation methods do you know?

3. What is the most widely used unit in the oil industry now?

4. Can the boiling points of different chemical products vary or are they fixed?

5. What does the sharpness of separation between hydrocarbons depend on?

IV. Translate from Russian into English

процесс первичной очистки; дробная (фракционная) перегонка; метод физического разделения; парообразная нефть, сжижать, температурный интервал кипения, острота сепарации.

V. Translate from English into Russian

capacity, the American barrel, at a constant rate, furnace, end product, unvaporized oil, fuel-gas system, simple distillation, draw-off points, stripping tray.

VI. Divide the text into main parts. Make the plan.

VII. Make an abstract of the text.

UNIT 7

FIND OUT METHODS OF PETROLEUM REFINING

I. Read and learn the words

volatile – летучий naphtha – сырая нефть adsorb – адсорбировать zeolite – цеолит

crystalline lattice – кристаллическая решётка residue – осадок to retain – сохранять cavity – впадина

lattice – решётка to chill – охлаждать woven canvas – сплетённые полотна