Producing Chemicals

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What are the five stages in the process of producing a useful chemical from raw materials?
1. Preparation of feedstack. 2. Synthesis. 3. Seperation of products. 4. Monitoring the purity of product OR Handling of by-products and waste
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What are raw materials?
They are naturally occurring substances which are needed, e.g. crude oil, natural gas
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What are feedstocks?
Feedstocks are the actual reactants needed for the process, e.g. hydrogen, ethanol
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What has to happen to the raw materials to make the feedstock?
Purified or changed
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When feedstocks are converted into products, what has to be controlled?
The conditions have to be controlled to make sure the reaction happens, and at a sensible rate
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what do chemical reactions usually produce?
The substance you want and some other chemicals known as by-products.
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Are the by-products useful?
They may be useful, or they might be waste
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In chemical reactions what else may be present?
Left-over reactants
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For the products to be dealt with in different ways what has to happen?
Everything has to be seperated out
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What happens to by-products?
They are sold or used in another reaction
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If the reaction is exothermic, what might there be waste of?
Waste heat
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Heat exchanges can use excess heat to produce what? And what does this save?
They produce steam or hot water for other reaction. They save energy and money
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Why to waste products have to be carefully disposed of?
They don't harm people or the environment
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Other cards in this set

Card 2

Front

What are raw materials?

Back

They are naturally occurring substances which are needed, e.g. crude oil, natural gas

Card 3

Front

What are feedstocks?

Back

Preview of the front of card 3

Card 4

Front

What has to happen to the raw materials to make the feedstock?

Back

Preview of the front of card 4

Card 5

Front

When feedstocks are converted into products, what has to be controlled?

Back

Preview of the front of card 5
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