Green Chemistry

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Green Chemistry

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Green chemistry

DEFINITION

Green Chemistry is the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products .

GREEN CHEMISTRY IS ABOUT

Waste Minimisation at Source

Use of Catalysts in place of Reagents

Using Non-Toxic Reagents

Use of Renewable Resources

Improved Atom Efficiency

Use of Solvent Free or Recyclable Environmentally Benign Solvent systems

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Green Chemistry Is About .

Cost

Waste

Materials

Hazard

Risk

Energy

Reducing

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Why do we need Green Chemistry ?

Chemistry is undeniably a very prominent part of our daily lives.

Chemical developments also bring new environmental problems and harmful unexpected side effects, which result in the need for ‘greener’ chemical products.

A famous example is the pesticide DDT.

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Green chemistry looks at pollution prevention on the molecular scale and is an extremely important area of Chemistry due to the importance of Chemistry in our world today and the implications it can show on our environment.

The Green Chemistry program supports the invention of more environmentally friendly chemical processes which reduce or even eliminate the generation of hazardous substances.

This program works very closely with the twelve principles of Green Chemistry.

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The 12 Principles of Green Chemistry (1-6)

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7 Use of Renewable Feedstocks

A raw material or feedstock should be renewable rather than depleting whenever technically and economically practicable.

8 Reduce Derivatives

Unnecessary derivatization (use of blocking groups, protection/de-protection, and temporary modification of physical/chemical processes) should be minimised or avoided if possible, because such steps require additional reagents and can generate waste.

9 Catalysis

Catalytic reagents (as selective as possible) are superior to stoichiometric reagents.

10 Design for Degradation

Chemical products should be designed so that at the end of their function they break down into innocuous degradation products and do not persist in the environment.

11 Real-time Analysis for Pollution Prevention

Analytical methodologies need to be further developed to allow for real-time, in-process monitoring and control prior to the formation of hazardous substances.