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MIGCO – THE LEADING SUPPLIER OF SPECIAL GAS IN VIETNAM

Along with Pure Argon, CO2, Helium, Hidro, Oxy, SF6, N2O, Neon,…, acetylene is one of the gas products supplied by MIGCO to nationwide customers.

/Our company is a reliable address for many customers when in need of buying/selling, filling pure gas, industry/medical gas,…. Coming to MIGCO, customers can completely be assured of both product and service quality since being consulted by a team of experienced and dedicated staff.

 

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How can we distinguish between pure and normal Acetylene?

Nowadays, Acetylene is a colorless gas that is widely used for producing natural gases and synthesizing various substances.

Today, There are many companies in need of buying and using Acetylene gas, but they can not detect the difference between ordinary and pure Acetylene?

Acetylene is unstable in its pure form and is often mixed with aqueous medium.

Pure acetylene is completely odorless, and the gas commonly available on the market today will have an odor that contains impurities

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Where and how was the acetylene gas formation discovered in history?

Acetylene gas was first discovered by Edmund Davy in 1836, while he was conducting experiments with potassium carbide. Since then, acetylene is created, a flammable gas. In 1859, Marcel Morren successfully created acetylene by using carbon electrodes to create an electric arc in hydrogen gas. The electric arc pushes the carbon atoms out of the electrode and bonds with the hydrogen atoms to create acetylene. Marcel Morren called it carbon hydrogenated gas.

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What ingredients are contained in crude acetylene?

Raw Acetylene is a gas hydrocarbon formulated as C2H2 consisting of two C atoms and two H atoms. Acetylene can be produced from a number of different raw materials according to commercial purposes.

The simplest process to make acetylene is based on the lime hydrate reaction between calcium carbide and water. Chemical reaction: CaC2 + 2H2O → C2H2 + Ca (OH) 2.

In addition, it also can be produced from natural gas such as methane gas, petroleum hydrocarbons, and coal at high temperatures. The resulting product is a mixture of many different gases such as hydrogen, acetylene, carbon monoxide, carbon dioxide,…. To separate the acetylene gas from the gas mixture, people often dissolve in solvents such as water, acetone, anhydrous ammonia, cold methanol, … depending on the process.

How to store and handle Acetylene gas perfectly.

The reservation and transportation of acetylene require great care because it is explosive. Acetylene should be transported through very short pipes and the pressure should be kept very low.

Acetylene gas will be kept in special containers contain small amounts of absorbents such as diatomaceous soil and acetone inside.

Acetylene gas will be injected into a cylinder at a pressure of about 300 psi (2,070 kPa) and dissolved in acetone resulting in a loss of the possibility of explosion for a safe transport.

Once the valve is opened, due to the reduced pressure, the acetylene immediately re-vaporizes through the fitting for use in welding or cutting.

How to control quality of Acetylene gas?

Acetylene contains impurities, the amount of impurities will be different depending on the type of gas that. Type B gas contains maximum 2% of impurities and commonly used for oxy-acetylene welding and metal cutting. Acetylene produced by chemical reaction meets this standard.

Maximum amount of impurities containing in Acetylene type A is 0.5% and this type of Acetylene commonly used for chemical manufacturing processes. Thermal cracking can produce gas that meets this standard.

Prospects in acetylene applications in the future.

Acetylene gas is expected to be studied and developed for more applications in the future. One of the new uses of acetylene is to convert acetylene gas into ethylene for the production of polyethylene plastics.

READ MORE :What is C2H2 gas (acetylene)? Preparation and application of acetylene

Methods of delivery of Acetylene gas.

As mentioned above, acetylene is easily explosive when liquefied, compressed, heated or mixed with air. Therefore, special precautions will be taken during production, storage and transportation.

Acetylene gas will be contained in cylindrical steel cylinders with different capacities such as 4liter, 8 liter, 10 liter, 40 liter, and 50 liter or refilled according to customer requirements.

MIGCO will use specialized vehicles and safety measures to deliver gas to the c wishing to buy.

 

What is Acetylene Gas?

Acetylene gas is colorless, odorless and highly volatile. Acetylene can be liquefied, compressed, heated or mixed with air and it is highly explosive in these statuses. Therefore, special precautions must be taken in Acetylene production, transportation and delivery.

Acetylene gas is mostly used as a raw material for the production of various organic compounds. For example, Acetylene is used fo making 1,4-butanediol – an organic compound which is widely used in the manufacture of polyurethane and polyester resins.

In addition, Acetylene gas is also used as a fuel for oxy-acetylene welding and metal cutting, used for producing dry batteries and making acetylenic alcohol. Furthermore, Acetylene also plays an important role in synthesizing vitamins.

processes of producing acetylene gas:

There are two different processes of producing acetylene gas: reactions at normal temperature and chemical process of cracking heat at extremely high temperature.

The details of each basic process of producing acetylene gas are right below.

Chemical process details:

The chemical reaction between calcium carbide and water produces acetylene and significant amounts of heat. Therefore, it is necessary to remove heat to prevent acetylene gas from exploding by wet processes i.e using water to absorb heat by adding calcium carbide to water or adding water to calcium carbide. We can also reduce the level of heat by using a drying process i.e. using only a limited amount of water, it will absorb the heat when it evaporates.

Most high-power acetylene production machines use a rotary screw conveyor to fill and transport 0.08 x 0.25inch (2mm x 6mm) calcium carbide particles into a water-filled reaction chamber. The grain is added according to the desired gas flow.

How to prepare Acetylene:

In the reaction chamber, solution of calcium carbide particles and water are continuously stirred by a rotating pan. This helps to avoid acetylene explosion because there are no particles floating on the surface. The resulting acetylene bubbles will escape from the water’s surface and be withdrawn under low pressure. When the gas leaves the reaction chamber, it is cooled with water. This cooling spray also replenishes water to the reaction chamber. Then, the gas is led through a flash block that restricts accidental ignition from other chamber devices.

Heat cracking process:

Acetylene gas can also be generated from various hydrocarbons by elevated heat to break the atomic bonds (thermal cracking). After these hydrocarbon atoms break apart, various gases are produced. This thermal cracking process is used to convert oil or natural gases into a variety of substances.

The result of thermal cracking depends on the input material and the method of heat lift. You can use the electric arc to heat up materials or the combustion chamber, ….

The most common way of producing Acetylene gas in the United States (USA) is using the combustion chamber to burn and burning natural gas, and this process goes as follows:

In the United States, the production of Acetylene gas is to heat natural gases such as methane at about 1,200 ° F (650 ° C). Hot gas is then passed through a narrow venturi to be mixed with oxygen to reduce the desired speed to avoid creating fire due to the gas melting too quickly or too slowly.

The gas mixture is then flowing into the combustion block through more than 100 narrow channels. It will be burned and generate heat  when entering each channel. The gas temperature now increased to about 2,730 ° F (1,500 ° C). Oxygen will be added in the burner regularly to stabilize the burning process. The gases will flow into the reactor space located just outside the furnace, burning process takes only a few hundredth of a second. One-third of the methane is made up of acetylene where the temperature is high, the rest of the methane will be burned.

When burning flames are rapidly cooled, the transition to Acetylene is greatest.

Cooled gases containing CO and H2 make up the majority, increasing the hydrocarbon temperature if the amount of acetylene is low with chapping. The products of thermal cracking are slurry of carbon, carbon dioxide, methane, acetylene and other gases. This mixture goes through the first water purifier to remove carbon soot, then through the second filter with N-methylpyrrolidinone solvent that absorbs Acetylene gas and withdraws at the top of the tower as a gas.

 

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What were the first uses for acetylene?

Georges Claude and A. Hess discovered that Acetylene could dissolve in acetone for safe storage in 1897. Then, Nils Dalen used this method for signal lamps, signal plates, auto rail in 1905. A year later he created an acetylene torch for welding or cutting metal.

How have the demands and applications of Acetylene gas been developed?

Demand for acetylene gas is increasing because it can produce many useful plastics and chemicals. It peaked in the United States from 1965 to 1970, then plummeted because the newly introduced alternative conversion material was less expensive. Since the early 1980s, the acetylene gas demand has slowed down at a rate of about 2-4% per year.

In 1991, there were eight acetylene production factories in the United States whose quantity is 352 million lb (160 million kg) per year. 66% of acetylene is produced from natural gas and 15% of acetylene gas is from petroleum processing and the remaining 19% from calcium carbide.