Analyze in real time to prevent pollution

madugundurukmini By madugundurukmini, 28th Aug 2013 | Follow this author | RSS Feed | Short URL http://nut.bz/15rk27i0/
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The very importance twelve principles of green chemistry

Design less hazardous chemical synthesis

1) Prevent waste:- Design chemical syntheses to prevent waste, leaving no waste to treat or clean
2) Design safer chemicals and products:- design chemical products to be fully effective, yet have little or no toxicity.
3) Design less hazardous chemical synthesis: -Design syntheses to use and generate substances with little or no toxicity to humans and the environment.
4) Use renewable feed stocks: -Use raw materials and feed -stocks that are renewable rather than depleting. Renewable feed stocks are often made from agricultural products or the wastes of other processes, depleting feed sticks are made from fossil fuels( petroleum ,natural, gas, or coal).

Use safer solvents and reaction conditions

5) Use catalysts, not stoichiometric reagents:- Minimise waste bu using catalytic reactions,. Catalysts are used in small amounts and a can carry out a single reaction many times,. They are preferable to stoichiometric reagents, which are used in excess and work only once.
6) Avoid chemical derivatives:- Avoid using blocking or protecting groups or any temporary modifications of the starting materials. There should be few, if any wasted atoms.
7) Maximize atom economy;- Design syntheses so that the final product contains the maximum proportion of the starting materials. There should be few, if any wasted atoms.
8) Use safer solvents and reaction conditions:Avoid using solvents, separation agents or other auxiliary chemicals. If these chemicals are necessary, use innocuous chemicals.

Minimise the potential for accidents

9) Increase energy efficiency:-Run chemical reactions at ambient temperature and pressure whenever possible.
10) Design chemicals and products to degrade after use. Design chemicals and products to breakdown to innocuous substances after use so that they do not accumulate in the environment.
11) Analyse in real time to prevent pollution:- include in – process real-time monitoring and control during synthesis to minimize or eliminate the formation of by -products.
12) Minimise the potential for accidents;- design chemicals and their forms (solid, liquid or gas). To minimize the potential for chemical accidents including explosions fires and releases to the environment.

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Analyze, Prevent Pollution, Real Time

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Comments

author avatar Ptrikha
28th Aug 2013 (#)

Good tips- are these for any specific checmical industry?

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author avatar Randhir Bechoo
28th Aug 2013 (#)

Interesting article.Good points made.

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author avatar Fern Mc Costigan
28th Aug 2013 (#)

Well said!

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