What are green chemistry principles?
What are green chemistry principles?
Definition of Green chemistry
Green chemistry is an important part of chemistry and chemical engineering
which focused on the designing of molecules, materials, products.
It processes that reduce the use and generation of hazardous substances.
Green chemistry is very essential
and significant for us. It gives a concept of environmentally
friendly design of products and processes.
History of green chemistry
Last 30 years , the live problem arise in the world is
pollution. The main cause of this pollution is unauthories use of chemistry inevery sector.
In the United States, the Environmental
Protection Agency played a significant early role in fostering green
chemistry through its pollution prevention programs.
The development of green chemistry was initially started through the pollution
prevention Act of 1990, in Europe and the United States.
It was linked to a shift
in environmental problem-solving strategies.
Why do we need green chemistry ?
Chemistry is no doubt a very prominent part in
our every day life.Developments of new chemicals in the
world create a environmental problem and harmfulunexpected side effects.
For prevention of this environmental
pollution problem , need a greener chemical products.
What are green chemistry principles?
The twelve principles address a range of ways to reduce the environmental and health impacts of chemical production, and also indicate research priorities for the development of green chemistrytechnologies.
What are the twelve green chemistry principles?
Prevent waste: Preventing waste is better than treating or cleaning up waste after it is
created.
Maximize atom economy: Syntheticmethods should try to maximize the incorporation of all materials used in the
process into the final product.
Less hazardous chemical
syntheses. Synthetic methods should avoid using or generating substances
toxic to humans and/or the environment.
safer chemicals and products: Chemicalproducts should be designed to achieve their desired function while being as
non-toxic as possible.
Safer solvents and auxiliaries.
Auxiliary substances should be avoided wherever possible, and as non-hazardous
as possible when they must be used.
Design for energy efficiency.
Energy requirements should be minimized, and processes should be conducted at
ambient temperature and pressure whenever possible.
Use of renewable feed stocks.
Whenever it is practical to do so, renewable feed stocks or raw materials are
preferable to non-renewable ones.
Reduce chemical derivatives.
Unnecessary generation of derivatives,such as the use of protecting groups,should be minimized or avoided if possible; such steps
require additional reagents and may generate additional waste.
Use catalysis. Catalytic reagents that can be used in small quantities to
repeat a reaction are superior to stoichimetric reagents (ones that
are consumed in a reaction).
Design for degradation.
Chemical products should be designed so that they do not pollute the
environment; when their function is complete, they should break down into
non-harmful products.
Real-time analysis for
pollution prevention. Analytical methodologies need to be further developed to
permit real-time, in-process monitoring and control before hazardous
substances form.
Minimize potential for accident
prevention. Whenever possible, the substances in a process, and the forms
of those substances, should be chosen to minimize risks such as explosions,
fires, and accidental releases.
Summary:
What is sustainable chemistry?
What is the main principle of green chemistry?
Summary:
What are green chemistry principles?
What is green chemistry?What is sustainable chemistry?
What is the main principle of green chemistry?
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