How to Write the Outline of Introduction to Chemical Design

Hello:

Give you a model essay.

We need green chemistry.

abstract:

Chemistry has influenced everything that constitutes our society and economy.

Something. It improves people's quality of life and makes it possible to create thousands of products. However, this

This achievement comes at a price:

The collective health of mankind and the global environment are being threatened.

Green chemistry is

A chemical method for preventing pollution from the source,

Therefore, green chemistry is a sustainable way to fundamentally solve environmental problems.

Scheme.

Key words:

Green chemistry

pollute

be harmless

environmental protection

Sustainable development;

Text:

We need green chemistry.

First, what is green chemistry?

Green chemistry is also called environment-friendly chemistry, and the corresponding technologies are called green technology and environment-friendly technology.

"green

Chemistry is very popular.

hundred years

Put forward in the 1960s.

"Green chemistry" refers to the guidance of green consciousness.

Negative research and design environment

Not effective or as small as possible.

As well as chemicals and chemical processes that are technically and economically feasible. Its core is the application of chemistry.

Knowledge and technology to prevent pollution

Eliminate pollution from the source

Avoid or reduce the generation of waste.

"green chemistry"

The goal is to study and

Look for non-toxic and harmless raw materials that can be fully utilized.

Maximize energy conservation.

All links have realized purification and pollution-free reaction.

Method of technology.

The biggest feature of "green chemistry"

Is that it used scientific means to prevent pollution from the beginning.

Therefore, both the process and the terminal are zero emission or pollution-free. Therefore, it can make full use of resources.

But also can realize ideal green pollution prevention.

Color technology should adopt highly selective chemical reaction with a certain conversion rate to produce the target product.

No or little by-products are produced.

Products or wastes reach or approach the "zero emission" process of wastes.

Second, the importance of green chemistry to human life

Chemistry and People's Catering

What are we going to eat today,

How to eat

This has become a common concern.

Green food, this kind

Pollution-free, safe, high-quality, natural and nutritious food has become people's first choice; green

Today, with the prevalence of consumption, our awareness of self-protection has gradually increased, and those pure natural ones have already taken the first step.

The food processed by advanced technology has been proved to be non-toxic and harmless by toxicological tests, which is beneficial to health and is welcomed by consumers.

Welcome to visit. Green consumption will go deep into all kinds of consumption.

Natural resources and ecological environment are the basic conditions for grain production.

Because of the relationship with life,

Resources,

Environmental correlation

Things are usually dubbed.

green

In order to highlight that this kind of food comes from a good ecological environment and can give people

Bring exuberant vitality, hence the name.

green food

. Green food doesn't mean

green

about

Food refers to pollution-free safe, high-quality and nutritious food.

As the green food has been approved and registered by the State Administration for Industry and Commerce, according to the relevant provisions of the Trademark Law, you can apply if you have the conditions.

The products marked with green food are as follows

five

Class. One is meat, non-live poultry, game, gravy, aquatic products and canned food.

Food, pickled, dried fruits and products, pickled, dried vegetables, eggs, milk and dairy products, edible oil, salads, and food.

Pectin, processed nuts, dried mushroom products, food protein; Second, coffee, coffee substitutes, cocoa, tea, tea.

Substitutes, sugar, candy, sugar, honey, syrup, non-medical nutritious food, cakes, dairy products and other cereals and noodles.

Products, puffed food, bean products,

Keywords edible starch and its products, drinking ice,

Keywords ice, salt, soy sauce,

Seasoning such as vinegar,

Yeast, edible essence, spice, household meat tenderizer, etc. Third, unprocessed forest products, unprocessed grain and agricultural products.

(

Including vegetables, seeds

)

Flowers, horticultural products, vegetation, living organisms, unprocessed fruits and dried fruits, fresh vegetables and species.

Seeds, animal feed

(

Include non-medical feed additives and fattening agents.

)

, malt, animal habitat supplies; The fourth is beer and mineral water.

And other non-alcoholic drinks, fruit drinks and fruit juices, solid drinks, syrups and other drinks;

Fifth, alcoholic beverages.

(

Except beer.

)

Green chemistry and human traffic

Green transportation is a way to use green energy.

Adopt green means of transportation,

Save resources,

No, city students

Harmful to the environment, people-oriented, safe, saving traffic costs, popularizing travel and benefiting the city.

A healthy and sustainable transportation system.

Bicycle is a kind of bicycle that does not consume any energy.

A pollution-free and body-building riding tool,

Real green transportation.

Love bicycles,

Make full use of bicycles,

This is a big part of our country.

Features are also a big advantage. Bicycles have no pollutants, no exhaust gas and no noise. Automobile exhaust

Lead in lead poisoning, as well as carbon monoxide, hydrogen carbide and carbon dioxide in tail gas. And cars.

Public hazards such as vibration and noise, as well as light pollution.

So what about the environmental pollution caused by the popular electric bicycles? Although electric bicycles are good at it.

No waste gas is generated during driving,

But the large number of batteries it uses is a source of pollution.

At present, the battery of electric bicycle also

This is a lead battery,

And it is difficult to have a better product update in a short time.

In Basel, which controls hazardous waste.

There are two prohibited pollutants "lead" and "waste acid" in the convention, which are the main components of lead storage batteries. And in

On the basis of the Basel Convention, China has added two categories: wastes containing "nickel" and wastes containing "barium", which are new.

Alternative batteries, nickel-cadmium batteries, are also included.

In lead-acid batteries,

The proportion of lead in the whole material

Very tall, Jim.

63%

. Although the recovery rate of lead can be achieved

85%

But experts estimate that every year through the atmosphere,

Lead discharged into the environment

About ten thousand tons.

Lead will accumulate in the blood,

Especially for children's intelligence.

Development has a great influence,

And affect future generations.

Therefore, the development prospect of electric bicycles is still worrying.

Controversial.

Cycling teams play an irreplaceable role in keeping fit.

According to the results of world sports science research,

work

Among nearly 100 sports such as walking, jogging, gymnastics and swimming, the fitness function of cycling ranks second. this

It's a study of the heart,

Muscles,

The brain and other parts have special exercise effects.

Some hearts have problems.

People who do strenuous exercise such as running are suitable for cycling.

But also has practical convenience,

Spend on,

under

On the way to class,

On a bicycle trip,

You can have both fish and bear's paw.

Why not do it?

Third, green chemistry and environmental protection.

China is a country with a large population,

It is also a country rich in resources.

But,

Economic development has driven capital.

The consumption of resources is increasing day by day,

The population continues to grow,

Various resources that can be allocated per capita are also increasing.

The less.

At present, the biggest contradiction facing our country is to sacrifice the environment for rapid economic development.

Exhibition,

Or limit the use of per capita resources to protect the existing ecological environment from being destroyed.

China's industry is

The development of the whole national economy has played a decisive role.

The chemical industry is held by other industries.

Continuously provide products and services.

But,

We are creating rapid economic growth rate and economic growth.

At the same time,

The whole nature has also suffered unprecedented damage.

Serious environmental pollution and ecological destruction.

With the development of economy,

But also seriously damaged people's health,

It has intensified various contradictions in society.

This gift

We urgently need to change the production mode and research mode and introduce "green chemistry" into the chemical industry.

Ideas,

Turn the end treatment of environmental pollution into the source prevention.

Green chemistry technology is not about terminals or

Pollution in the production process is controlled or treated. Therefore, there is an essential difference between green chemical technology and "three wastes treatment"

The latter is the control of terminal pollution rather than the prevention of initial pollution. We have been consuming resources and making waste.

Then invest a lot of money to clean the environment.

But,

We must move on,

Let the problems of the past never happen again in the future.

Appear again

This is what makes us happy about green chemistry.

It allows us to be creative,

Du from the source

Never pollute, never make mistakes again.

At present, the main research problems of green chemistry are

Aspects:

Stop pollution at the source,

Instead of treating pollution at the end.

The synthetic method should have the principle of "atomic economy", that is, make it participate as much as possible.

All the atoms in the reaction process enter the final product.

Try not to use it in synthetic methods, which will not cause any harm to human health.

Toxic and harmful substances in health and environment

Design chemical products with high use efficiency and low environmental toxicity

As far as I can

Do not use auxiliary substances such as solvents, which must be harmless as a last resort.

The production process should be mild.

Temperature and pressure, and minimum energy consumption.

Try to use renewable raw materials, especially biological raw materials.

Quality replaces mineral raw materials such as oil and coal.

Minimize by-products

Use highly selective catalyst

10.

change

Chemical products can be degraded into harmless substances after use, and can enter the natural ecological cycle.

1 1.

Timely development

Analytical techniques monitor the formation of harmful substances.

12.

Select substances involved in chemical processes,

Minimize the occurrence

Risk of accidents.

Green chemistry requires that we should, on the premise of existing science and technology,

Strive to apply all kinds of harmless and pollution-free raw materials.

Materials to replace toxic and harmful raw materials,

Try to be economical and efficient in the process of applying various raw materials.

Maximize transformation,

Minimize pollutant emissions and achieve zero emissions.

For example, it is often used in chemical production at present.

Using phosgene, formaldehyde, hydrocyanic acid and acrylonitrile as raw materials, it is highly toxic. Take phosgene as an example, it is itself a kind of

Military poison gas,

But it can react with many organic compounds,

Produce a variety of products.

In the production of poly

Since the emergence of green chemistry, the production of ethyl carbamate from phosgene is a famous example.

In the foam with large consumption and wide use,

Polyurethane foam accounts for the largest proportion.

It also

Used in coatings, adhesives, synthetic fibers and synthetic rubber.

The traditional process of producing polyurethane is to synthesize isocyanate from amine and phosgene;

RNH2

cobaltous chloride

-→

RNCO

2 hydrochloric acid

reuse

RNCO

and

rare

′

Ohio

Reaction for producing polyurethane:

RNCO

rare

′

Ohio

-→

RNHCO2R

′

The process not only uses highly toxic phosgene as raw material,

But also produces harmful by-product hydrogen chloride.

beautiful

The new process of Monsanto uses carbon dioxide instead of phosgene.

carbon dioxide

and

cobaltous chloride

the difference is

carbon dioxide

Use oxygen

Atoms are replaced.

cobaltous chloride

Chlorine atoms are present, but keep molecules containing.

Commander (commanding officer)

Composition, so

carbon dioxide

and

Reactions of amines can also produce isocyanates:

RNH2

carbon dioxide

-→

RNCO

H2O

In addition, polyurethane can also be prepared:

RNCO

rare

′

Ohio

-→

RNHCO2R

′

As we all know,

Carbon dioxide is a non-toxic gas,

Its harm to the environment is the greenhouse effect,

But in life,

In the process of producing polyurethane,

carbon dioxide

It is a kind of consumed raw material, which will not produce greenhouse effect, and it is also true for the earth.

Reduce consumption

carbon dioxide

Made great contributions. At the same time,

carbon dioxide

Hit a target/mark

Commander (commanding officer)

After being consumed, the remaining oxygen combines with hydrogen to form water.

And it is a pollution-free by-product.

In short, high efficiency is the goal that chemistry has been pursuing, and the idea of high efficiency is to use the original as little as possible.

Materials, make as many finished products as possible; Discharge as little pollutants as possible and improve the conversion rate as much as possible.

The national pollutant discharge standard is actually based on the assumption that every chemical enterprise is in accordance with the high

On the premise of efficient production and operation. Recycling materials recycling embodies the principle of reducing and saving resources.

Reading,

Reuse embodies the idea of reducing costs.

Both of them are aimed at improving the enterprise economy of a resource-saving society.

Effective methods of operating costs. For various materials that are difficult to purify in the natural environment or in a short time,

Reuse should be realized;

For those highly polluting chemical products, such as batteries, we should try our best to achieve the benefits of recycling.

Use.

It is an effective green way to advocate recycling materials in society.

Through recycling and reuse

In the production and design of chemical products, we should consider abandoning high-cost and high-pollution raw materials.

Recycling,

The pollution of polymer raw materials in the natural environment is the most obvious.

Only at the time of design

It is considered that if it is included in the recycling scope, it can turn waste into treasure and pollution into green. Therefore,

The development of green chemistry is very important.

Personal thoughts:

The future of green chemistry is moving towards a period of vigorous development.

And the new green chemical technology has begun to enter the big stage.

Study in it. enter

2 1

2 1 century, the development of chemical process mainly adopts two ways: miniaturization and integration of equipment.

Diameter. The miniaturization and integration of chemical process can not only save equipment investment, but also reduce the scale of the factory.

In order to save investment in factory buildings and public works. In the future, chemical plants will be downsized, energy will be used efficiently, and production will be clean.

Cleaner production in chemical plants. The greening, miniaturization and integration of chemical industry is a severe challenge for China.

It is also an opportunity to achieve leap-forward development.

At the same time, it is also the only way for sustainable economic and social development.

therefore

We should seize the opportunity and strive to catch up.

The development of green chemistry needs to re-recognize and evaluate the traditional chemistry and chemical engineering discipline.

Conceptually,

reason

On the development and innovation of technology.

With the gradual formation of green chemistry as the frontier of the discipline,

Chemical Research

The face of research and chemical production will change greatly.

The green strategy of water treatment agent is put forward

It provides a rare opportunity to catch up with the advanced level in the world.

In the past,

Due to the late start and other reasons,

China and developed countries.

There is always a certain gap between them in science and technology.

Brand-new green chemistry makes us stand with developed countries.

On the same starting line.

In order to eliminate pollution,

Developing green chemistry to save the earth and benefit future generations

Contribute.

The development of green chemistry is not only related to environmental problems,

It's also related to our lives,

Eat, wear, live and travel.

It is inseparable from it, and the cups we use and the snacks we eat are inseparable from chemistry. This is the only way.

By developing green chemistry,

In order to ensure our safety,

Health!

Only in this way can we effectively escape harmful chemicals.

My hurt.

The new technology adopted,

Strengthen the detection of chemical additives,

Use non-toxic and harmless substitutes,

It has become people's knowledge.

Because it's the only way,

Only in this way can Shuanghui be effectively prevented from being lean.

Plasticization in Taiwan Province Province

Agency incidents, as well as melamine tainted milk powder incidents. It also gives us a healthy life.

prospect

2 1

In this century, China's industrialization and urbanization will continue to develop and its population will increase.

The demand of industry will also increase, while the traditional chemical industry is used in pesticides, polymers, materials science, detergents,

Petroleum additives,

Water treatment,

Garbage disposal and other aspects have made great contributions.

On the other hand, it also brings

Negative effects-environmental pollution,

Environmental pressure increases.

People are interested in improving the environment,

rise

There is a growing demand for quality of life. The CPC Central Committee and the State Council repeatedly stressed:

"Protecting the environment is the responsibility of our country.

A basic national policy,

Is an important part of the sustainable development strategy,

It is directly related to the success or failure of modernization.

The rejuvenation of the Chinese nation. "

Accelerate economic construction,

Never at the expense of destroying the environment,

Never protect the environment.

Protection and economic construction are opposite or separate,

Never take the old road of pollution first and then treatment.

That's too expensive.

Big "

"Construction projects must implement the" three simultaneities "of environmental pollution prevention facilities and main projects.

(At the same time of design,

Construction at the same time, put into production at the same time). Vigorously promote cleaner production "

"prevent waste of resources"

, for

Therefore, green chemistry takes its "atomic economy" as its basic principle, on the one hand, it makes full use of resources to prevent waste,

On the other hand, realize "zero emission"

Thereby achieving the effect of not polluting the environment. Therefore, it is of great significance to the modernization of China.

Construction and human life in the future are of inestimable significance.

Because green chemistry is nontoxic,

Harmless,

At present, it has become a research hotspot all over the world because of its high utilization rate, miniaturization and integration.

Moreover, it has become the main method to transform the existing process, eliminate pollution and improve the yield.

With the development of science and technology, green chemistry will be deeply rooted in people's hearts and enter thousands of households to serve our life and study.

Escort our future environmental protection and make great achievements!

Finally, I want to say

：

We need development, but we need a green living environment and a healthier body.

Body!

join

examination

writing

gift

Jiang yue,

The importance of chemistry to human life (

), Science and Technology Forum,