What is black gold and what is called black gold?

Africa's most prized black rhinoceros is known as "black gold". Oil, coal is also known as black gold, coffee also has the reputation of black gold, and the annual global consumption is three times that of tea.

Since the middle of the 19th century, when people began to extract oil from the ground, oil has become more and more important in the world, and it can be said that oil has become a strategic material of great importance in the world today. From the country's industry, agriculture, transportation, and national defense, to everyone's food, clothing, housing and transportation, all of them are inseparable from oil. Despite the fact that oil is black in appearance, it is not an exaggeration to call it "black gold" and "the blood of industry".

It is difficult to determine exactly how many products can be processed from oil. Generally speaking, there are about 500 kinds of oils, including fuels, lubricants, asphalt, paraffin, etc.; There are more types of petrochemical products such as synthetic resins, synthetic fibers and synthetic rubber, at least more than 1,500 kinds; As for the various fine chemical products made of petroleum as raw materials, such as surfactants, additives, adhesives, dyes, coatings, spices, medicines, pesticides and additives, there are countless more.

In the case of oils, the largest quantity is fuel, followed by lubricants and petroleum asphalt. The so-called fuels include gasoline, diesel, jet fuel and fuel oil; Lubricant is a general term for lubricating oil and grease, which is divided into gasoline engine oil, diesel engine oil, gear oil, mechanical oil and so on. In addition, there are some solid petroleum products that are not in large quantities but are also indispensable, such as petroleum bitumen, paraffin wax and petroleum coke.

From the perspective of people's clothing, food, housing and transportation, which is also inseparable from oil. Nowadays, people's clothing is really full of flowers and flowers, thanks to the rapid development of synthetic fibers such as polyester, acrylic, nylon, etc., as well as colorful fuels, so that various styles of clothing are not only beautiful and crisp but also not expensive, so that young and old can dress themselves as they like. As for the many brands of laundry detergents and detergents that can effectively clean all kinds of fabrics, they are also petroleum-derived products.

Some people may think that oil cannot be eaten, and it seems to have nothing to do with "food". In fact, the relationship is also very large, not to mention that many food packaging is now made of plastic bags, but to make agriculture abundant, chemical fertilizers and pesticides are indispensable. At present, the vegetables in winter are so fresh and tender and varied, and the plastic greenhouses are indispensable, and the effect of plastic film on the warming and moisture of field crops is also well known.

It can be said that "yes", it is even more inseparable from oil. You need gasoline to drive a car, diesel fuel to take a train, jet fuel to fly a plane, and fuel oil to burn on a sea vessel. The moving parts of these power machines must be lubricated with oil or grease, otherwise they will be quickly damaged.

In addition, the asphalt on the road and the synthetic rubber tires on the wheels are also produced from petroleum.

It can be seen that from oil there are so many products that are indispensable for production and life, so oil is a "treasure".

Coal. But there are also people who call oil black gold, but traditionally people call coal black gold and oil as liquid**.

It is coal, which is a very abundant resource and can help us solve many difficulties, so there are many places that are in great need of coal. But there are also many people who refer to oil as black gold.

It is coal, because the use value of coal in life is relatively high, and it is also a relatively important energy source.

Black gold, i.e. rhodium gold, is a precious and rare metal, and black gold has a wide range of applications, such as:

1. Black gold (rhodium gold) is resistant to high temperatures, and can more effectively remove nitrogen oxides in automobile exhaust. And compared to platinum, it is easier to be a substitute for palladium.

2. Many luxury goods, such as jewelry and brand-name bags, usually contain black gold, such as the royal jewelry worn by the Queen of England is also plated with black gold.

3. Black gold (rhodium gold) can also be used in mobile phones, such as:

Karalux, a Vietnamese company that specializes in gold-plated modification services for mobile phones, has now launched a "black gold" plating service specifically for the iPhone 6S, which is understood to refer to a new color that results from the fusion of rhodium, a rare metal, in a certain proportion, with rhodium 6 times more than 24k.

Blackening doesn't have to be fake.

Although there will be blackening of fake**, there are many reasons for blackening, such as blackening after contact with sweat, cosmetics, and oil.

**It has strong stability, and will not easily appear whitish, black and faded, etc., if there is a discoloration phenomenon, and this discoloration phenomenon can not be removed, it means that there is a problem with the ** itself, it may be fake, or it may be ** purity is not high enough.

Precautions for purchasing**

1. Weigh the weight. If the item is **, there is a heavy feeling, this is what people call the "golden pendant", and vice versa.

2. Look at the color. Pure gold shines brightly when exposed to intense light, which is not found in other metals, including copper.

3. Reviewing the rhyme. **Jewelry is thrown on the floor and makes a popping sound, the fake sound is high-pitched, and it is higher than **jumping.

4. Fold soft and hard. **It has the characteristics of good ductility and low hardness, pure gold is soft and soft, and copper strips are laborious.

5. Use acid spots. **Insoluble in acid, fake because of other active metals such as copper, it will react with acidic solutions.

<> petroleum refers to a mixture of gaseous, liquid and solid hydrocarbons with a natural occurrence. Petroleum is divided into the forms of **, natural gas, natural gas liquid and natural tar, but it is customary to use "oil" as the definition of "**". Oil is formed underground, is the ancient ocean or lake organisms after a long period of evolution, belongs to biological sedimentation into oil, non-renewable, it has experienced millions of years or even hundreds of millions of years of evolutionary process, different ages of oil generation geological environment is different, the physical properties of oil generation are also different.

The density, viscosity, melting point and initial distillation point of oil produced in different oil fields are different.

Pharmaceuticals are indeed inseparable from oil. Not to mention indirect consumables, such as plastics used in packaging, and even medicines themselves rely on oil. For example, benzene, many drugs are derived from benzene, and benzene is produced from petroleum, and the progress of modern medicine is also inextricably linked to petrochemical technology.

In addition, petroleum products are used in prosthetic limbs, artificial organs, medical X-rays and their treatment solutions. Cleaning supplies, without oil, our lives would be dirty. Many of the cleaning products we use are petroleum products, such as detergents, shampoos, shower gels, soaps, etc., which contain petroleum derivatives.

Organic solution, organic solution gasoline is an organic solution necessary for the industrial production of rubber materials, paints, leather goods, tin foil, etc., and can be used to clean machinery and parts. It is an important part of the raw materials and chemical intermediates for the industrial production of analytical chemicals. The use of oil is very large, used in many industries, in the market sales also occupy a certain share of the market share, the application of oil has also caused profits, so it is called "black gold".

Oil is known as black gold, its value is particularly high, oil as one of the most important raw materials now, can be applied to all aspects, can also be decomposed into different substances, the use value is particularly high.

It is oil, the value is particularly high, the demand in society is particularly large, and such a substance is needed in any industry, and the process of formation is particularly long.

Oil, the value is very high, oil can be broken down into different substances, can be processed into different things.