Another way to put it would be along these lines.... The least amounts of sulphur are found in the lighter fractions as opposed to the heavier fractions (bitumen, fuel oils) which contain higher (or 'substantially higher') percentages of sulphur.

the jet fuel that you listed in your example is a grade of kerosene.

I wouldn't substitute the word 'decomposing' for 'breaking', it is fine. However if you use 'breaking down' it gives a more apt description of what is happening in the process. In the refinery process stream there is a 'fractionating tower'

yes, very similar.. a person of blue blood belongs to the royal family.

relinquish.... Please be kind enough to relinquish Mr. John from his duties for two weeks for he will be participating in the Royal Celebrations as a General Supervisor.

well yes, solids would be a better word than silt. Because some of the solids are so fine that they are held in suspension in the oil. But silt and ooze are two different components. As for 'ooze', this can be a name for a mixture of

Lcchang wrote: Dear teachers, When we studied English at school, we learned that to go out with a girl/ boy is having a " date ". And, to meet someone for business or to go to a job interview is called an " appointment ". What about

Antonija wrote: Which is correct? Thank you. The major part of salt and silt/ooze is removed from oil yet on the oil field. The majority of the water, salts and larger solids are removed on the oil fields.

at one time there was a product marketed as 'lighting kerosene' by one of the oil companies. and yes, kerosene would be included in the range of different 'fuel oils'.

'exceed' or 'exceeded'....