The operation of a chemical manufacturing process

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  • Created by: J.E.C.
  • Created on: 28-04-14 10:50
Most chemical processes involve a series of __ __?
Unit operations
1 of 12
In batch process the reactants are put into a vessel and allowed to react together, the reaction is __ and when complete the reaction phase is ___? The product is _ from the mixture and the process is repeated until...?
Monitored, terminated. Separated, the required amount of product is manufactured.
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In a continuous process, the starting materials are ___ and the products are ___ in a continuous process.
Fed in at one end, withdrawn at the other end of the plant.
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Batch processes are most cost effective when...?
Relatively small amounts of products are required.
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Batch processes are more applicable to __ reactions, where long residence time in the reaction vessel makes adaptation to a continuous operation difficult.
Slow
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Continuous production is more suited to __-__ production of __ product?
High-tonnage, one
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Give 3 advantages of the batch process?
1. Cost effective for small quantities due to lower capital costs 2. Caters for slow reactions 3. Range of products can be produced in same vessel
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Give 3 advantages of the continuous process?
1. Little or no down time 2. Requires minimal labour 3. Consistent quality
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Give 3 disadvantages of the batch process?
1. Shut-down time necessary for charging & emptying 2. Requires larger workforce 3. Contamination more likely.
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Give 3 disadvantages of the continuous process?
1. Higher capital costs before production 2. Not cost effective when run below full capactiy 3. Contamination risk is higher when used for 2 or 3 products
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It is important to choose construction materials that do not...?
React with feedstocks, catalysts, solvents or products involved in the process.
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What construction materials are widely used in place of steel?
Glass-lined vessels or alloys
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Other cards in this set

Card 2

Front

In batch process the reactants are put into a vessel and allowed to react together, the reaction is __ and when complete the reaction phase is ___? The product is _ from the mixture and the process is repeated until...?

Back

Monitored, terminated. Separated, the required amount of product is manufactured.

Card 3

Front

In a continuous process, the starting materials are ___ and the products are ___ in a continuous process.

Back

Preview of the front of card 3

Card 4

Front

Batch processes are most cost effective when...?

Back

Preview of the front of card 4

Card 5

Front

Batch processes are more applicable to __ reactions, where long residence time in the reaction vessel makes adaptation to a continuous operation difficult.

Back

Preview of the front of card 5
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