Green chemistry in an emerging field of science that develops chemicals to be benign. Rather than presuming to keep human and ecological exposures to chemicals within levels of toxicity deemed “acceptable,”, sustainable chemistry aims to make chemicals inherently safe.
Green chemistry designs after a set of principles it includes:
Design chemical products that have little or no toxicity. Break down compounds to innocuous substances after use, so it does not accumulate in the environment. Depend on renewable feedstock’s, such as corn and soybeans. Green design syntheses the final product contains the maximum proportion of the starting materials. With few atoms wasted. Minimise the use of solvents, separation agents, or other auxiliary chemicals. When such chemicals are necessary, use innocuous chemicals such as water. Besides, increase energy efficiency by manufacturing at ambient temperature and pressure. As a result of green chemistry, in Dry Cleaning “Perc”( trichloroethylene) is replaced and no longer needed, paint made without petroleum and manufacturers of drugs such as ibuprofen does not produce hazardous wastes such as cyanide and formaldehyde.
The twelve principles of green chemistry
- Prevent waste
- Maximise atom economy
- Safer chemicals and products
- Safer solvents and reaction conditions
- Increase energy efficiency
- Use renewable feedstock’s
- Avoid chemical derivatives (protein groups)
- Use catalysts
- Design chemicals and products to degrade after use
- Analyse in real-time to prevent pollution
- Minimise the potential for accidents