C1.5 Other useful substances from crude oil Flashcards
1
Q
What is the process of cracking?
A
Heating hydrocarbons to vaporise them
The vapours are either passed over a hot catalyst or mixed with steam and heated to a very high temperature so that thermal decomposition reactions then occur
2
Q
What are the products of cracking?
A
Unsaturated hydrocarbons called alkenes
3
Q
Name some alkenes (2)
A
Ethene
Propene
4
Q
What does this = mean in a displayed structure?
A
It has a double bond
5
Q
What can alkenes be used to make?
A
Polymers
6
Q
What are polymers used for?
A
- New packaging materials
- Waterproof coatings for fabrics
- Dental polymers, wound dressings
- Hydrogels, smart materials (including shape memory polymers).
7
Q
What is another process for making ethanol?
A
fermentation with yeast