Home > Science > Additional OCR Gateway Science Topics > Chemical economics > Batch and continuous processing
The large scale manufacture of chemicals is usually a:
For which of the following are labour costs likely to be greatest?
Which of these methods would be best for the separation of a group of substances extracted into a solvent from a plant?
How are energy costs kept as low as possible when manufacturing ammonia?
By keeping the reactor hot all the time
By keeping the reactor at room temperature
By heating the reactor up for only some of the time
In the chemical industry, what is meant by pay back time?
The time until any of the product is sold
The time taken for testing the efficacy and safety of a drug
The time it takes for a product to earn more than the development costs