What are the two main characteristics of an oil?

Chemical degreasers are oil treatment agents composed of surfactants, solvents and a small amount of additives. Its mechanism of action is to use the emulsification of surfactant to emulsify the oil film to form an O W type emulsion. Solvents reduce the viscosity of the oil, making it easy to emulsify.

A small amount of additives can promote the emulsification and dispersion process, improve the emulsification efficiency, and increase the stability of the emulsion. When a sufficient amount of chemical degreaser is sprayed on the oil spill film, the surfactant molecules are immediately targeted at the oil-water interface, and the lipophilic group extends to the oil, and the hydrophilic group extends to the water, so that the interfacial tension is greatly reduced, and a boundary with a certain strength is formed. As a result, the cohesion of the oil film is weakened and reduced, so that the oil film is easy to emulsify and disperse into small oil droplets and transfer into the water body, especially under the action of external forces (caused by wind, waves or work boats), which can accelerate its milk...

1. Flammability.

Petroleum products are hydrocarbons.

Combustion reactions can easily occur when exposed to fire or heat. The burning danger of oil can be judged by flash point, ignition point and spontaneous ignition point.

Flash point: The lowest temperature at which the mixture of oil vapor and air is close to the flame and extinguishes immediately after the spark flashes under the specified experimental conditions. Ignition point: The lowest temperature at which a combustible material begins to burn continuously. Generally speaking, it is 1-5 degrees higher than the flash point.

An external spark is required to generate the flash point and ignition point of the oil, and if the temperature of the oil continues to increase, spontaneous combustion will occur even if there is no spark. The lower the flash point of the oil, the greater the risk of fire of the oil. Gasoline and diesel are both oils that burn when exposed to an open flame.

2. Explosiveness.

When petroleum vapor is mixed with air and reaches a certain mixing ratio range, it will occur when it encounters fire, and the mixing ratio range is called the limit.

The lowest mixing ratio is called the lower limit.

The highest mixing ratio is called the upper limit. Below the lower limit, it will not ** and will not burn in case of fire. Burning above the upper limit in case of fire, oil fires often occur alternately between ** and combustion.

3. Easy evaporation.

1kg of gasoline can evaporate about cubic meters of gasoline vapor. The specific gravity of oil vapor is generally between, and it is often trapped in low parts with poor air circulation or gathered in low-lying places.

Fourth, it is easy to generate static electricity.

Resistivity of petroleum products.

The smaller, the greater the ability to accumulate charge. The electric spark generated by the electrostatic voltage above 4V has reached the ignition energy of gasoline vapor. Factors influencing static electricity accumulation: humidity of the surrounding air, oil flow speed, oil pressure, conductivity.

5. Fluidity and expansiveness.

Oil is fluid and has fluidity. At the same time, oil, like all substances, has thermal expansion and cold contraction.

characteristics. As the temperature increases, the volume of the oil expands and the pressure increases. The temperature decreases, the volume shrinks, and the pressure drops.

Flammability. Explosive.

Volatile. It is easy to accumulate and generate static electricity. Poisonous.

Petroleum products are chemical products that can be used for various purposes after a series of treatments and processing. The characteristics of petroleum products depend on a variety of factors, such as ****, refining and processing technology, additives, etc.

Here are some common characteristics of petroleum Yuzaoqiao refined products:

1.Density: Different types of petroleum products have different densities, and it is the weight of the refined oil per unit volume.

2.Viscosity: refers to the viscosity of the flow of refined oil, the refined oil with high viscosity is thicker, and the refined oil with low viscosity is thinner.

3.Ignition point: refers to the temperature at which the refined oil begins to spontaneously combust, and the ignition point of different types of refined oil is different.

4.Evaporability: refers to the rate at which the refined oil evaporates at a certain temperature, and the evaporation performance of the refined oil has an important impact on the start and operation of the engine.

5.Anti-knock ability: refers to the anti-knock ability of the refined oil, that is, the octane number or anti-knock index (AKI). The higher the octane number, the stronger the knock resistance, which is suitable for high compression ratio engines.

6.Oxidation stability: refers to the stability of the refined oil under oxidation conditions, that is, chemical stability. Refined oil products need to be chemically stable when used in wheels to prevent degradation and deposition of the oil.

7.Cleanliness: refers to the impurity content, carbon precipitation and cleanliness level in the refined oil, and the cleanliness of the refined oil will affect the service life and fuel consumption of the engine.

In conclusion, the properties of petroleum products have a very important impact on their performance in different applications. Open to the world.

3. There is no such thing as liquid grease, liquid is oil, and solid is fat.

Oil is an unsaturated higher fatty acid glyceride, vegetable oil is generally liquid at room temperature and pressure, called oil, and animal fat is solid at room temperature and pressure, called lipid.

The main component of vegetable oil is glycerides of fatty acids, so it is also called fatty oil (fatty oil); It does not volatilize under normal circumstances, so it is sometimes referred to as fixed oil.

Mineral oil is petroleum, shale oil, and their products, the main components of which are hydrocarbons. Most of them are volatile, can be distilled or fractionated, and then processed to obtain gasoline, kerosene, lubricating oil, etc.

Animal and vegetable fats or mineral oils?

The basic features are:

Animal and vegetable fats and fats are glycerides, which are distinguished by the fatty acid composition.

Mineral oils are liquid hydrocarbons with different fractionation boiling points.