Unit 3 : Getting the most from reactants

Question 1

Industrial processes are designed to …

Answer 1

Industrial processes are designed to maximise profits and maximise the impact on the enviroment

Question 2

Factors influencing inustrial process design include:

Answer 2

Raw materials and feedstocks have to :

• To be readily available
• Preferably from a sustainble source
• At a suitable cost

Recycling of materials should be able to reduce costs.
The energy requirements for a process should be minimised.

Can any unavoidable by-products also be sold at a profit or do they have to be disposed of as a costly waste?

The process should have the highest possible yield and the maximum atom economy

Question 3

What is the many enviromental considerations of the industrial process

Answer 3

Minimise the prodcution of waste ; either as unwanted products, or thorugh the use of materials (eg solvents) which require disposal at the end of the process.

Avoid the use or production of toxic materials, or those which will not degrade in the enviroment.

Question 4

Reactions which have high percentage yeild may have low atom economy value if…

Answer 4

Reactions which have high percentage yeild may have low atom economy value if large quantities of by-products are formed.