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Normal hexane
Normal hexane
Normal hexane
Normal hexane
Normal hexane
Normal hexane

Normal hexane

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Normal hexane (n-Hexane) is a linear saturated hydrocarbon with the chemical formula C₆H₁₄ that is classified as an alkane. This substance is known as a colorless, volatile, flammable liquid with a petroleum-like odor. Due to its non-polarity, normal hexane is well soluble in many organic compounds, but is insoluble in water.

Normal hexane is one of the main compounds found in light petroleum cuts and is usually extracted from naphtha during the distillation or isomerization process. It is used as a widely used industrial solvent in various industries such as edible oil extraction, adhesives, paints and thinners, industrial cleaners, and rubber product manufacturing.

Normal hexane is the direct isomer of a 6-carbon alkane in terms of molecular structure and differs from isomers such as 2-methylpentane or 3-methylpentane. It is usually marketed as a mixture of isomers, but normal (linear) grade is preferred in more sensitive applications due to its higher purity and more uniform behavior.

Normal hexane or n-hexane was identified through the efforts of French chemist Charles François de Maricourt, who extracted it from crude oil and named it “hexane” and determined the chemical structure of n-hexane, showing that hexane is a saturated aliphatic hydrocarbon with a straight chain.
Hexane, with a POM of 8058 and a molecular weight of 86.18g/mol, is a colorless liquid with a faint petroleum odor and is toxic and is considered an aliphatic hydrocarbon.

 

Usages

Applications of Normal Hexane: From Pharmaceuticals to Paints and Resins
Normal Hexane is used in various industries due to its unique properties such as high purity, volatility, non-polarity and excellent solvency. Below are the most important applications of this substance and its role in production, formulation or processing:
1. Oil extraction and food industries
Normal Hexane is used to extract vegetable oil from oilseeds such as rapeseed, soybean, peanut, canola and corn. This solvent helps in maximum oil extraction with high efficiency. Food grade normal hexane must be highly controlled in terms of solvent residue.
Our customers in the oil extraction field can receive food grade normal hexane with controlled purity.
2. Paint, Adhesive and Resin Industries
In the production of paints, thinners, industrial adhesives, acrylic and polyurethane resins, normal hexane is used as a diluent and solvent. Due to its high evaporation rate, it helps in faster drying of the paint and uniformity of the surface.
We are able to supply high purity industrial grade normal hexane suitable for paint and resin factories.
3. Pharmaceutical and laboratory industry
As a non-polar solvent for extracting organic compounds and cleaning, normal hexane is used in laboratories and some pharmaceutical formulations.
4. Rubber and plastic industry
The role of normal hexane in these industries is important as a density regulator and solvent for preparing polymers.
5. Furniture, wood and printing industries
In the production of furniture and wood veneers, normal hexane is used for surface cleaning, coating preparation and cleaning of resins. It is also used in the printing industry as a solvent-based ink cleaner.

Storage conditions

To prevent explosion, this flammable chemical should be stored in an enclosed area with adequate ventilation and explosion-proof electrical and lighting equipment. Do not use compressed air for filling, emptying, or handling, and always use non-sparking hand tools.

In the event of a hexane fire, take the following steps:

Stop the chemical release.

Extinguish all sources of ignition.

Use water. However, water spray should not be used as it may spread the fire.

Use fire extinguishers containing foam, dry chemical, and carbon dioxide.
In the event of a fire or chemical spill, contact local health and pollution control officials.

The chemical formula of this substance is C6H14. It is also called normal hexane. This substance is a petroleum derivative. It is a colorless liquid with a slightly unpleasant odor, highly flammable, and its vapors are flammable. n-Hexane is used in its pure form in laboratories.

In industries, this substance is used in combination with solvents and other chemicals. The most important use of solvents containing n-hexane is to extract vegetable oil such as soybean oil. These solvents are also used as cleaning agents in paints, textiles, and household appliances. This substance is insoluble in water. This petroleum compound contains an alkane compound and an active organic compound. n-Hexane is an unbranched alkane containing 6 carbon atoms, which acts as a non-polar solvent. Another use of this substance is as a thinner solvent alongside normal butanol, methanol, isopropyl alcohol, and even ethanol.

 

 

Normal hexane is a chemical compound derived from petroleum.

Normal hexane uses:

The main use of this substance is for extracting vegetable edible oils, although other petroleum solvents and other organic solvents are also used for this purpose. The reason for the preference of n-hexane is that it can maintain the original color of the vegetable oil. Another use of this compound is in adhesives. In fact, n-hexane is widely used in the adhesive and leather and shoemaking industries. This chemical is also used as a carrier agent in some perfumes.

Normal hexane safety tips:

Be sure to wear gloves and safety glasses when working with this chemical compound and do not smoke while working.

Inhalation: In this case, go to fresh air and loosen tight clothing such as collars, belts or ties. If breathing is still difficult, oxygen should be given.

Eye contact: Remove lenses immediately and rinse eyes with plenty of water. Do not use any ointments or medications.

Skin contact: Wash contaminated skin with soap and water and cover the skin with antibacterial cream.

Ingestion: If swallowed, do not induce vomiting. Drink one or two glasses of water, but do not give anything to the person if they are unconscious. To prevent ignition of this material, it must be stored in a closed environment with adequate ventilation and fire-resistant equipment. Do not use compressed air to fill, empty or move this material. Other explanations

 

Production Method:

Normal hexane is obtained mainly by refining edible oils. The exact composition of the distillate depends on the source of the oil (crude or refined) and the method of refining. The industrial product (which usually contains 50% by weight of the straight-chain isomer) has a boiling point of 65 to 70 °C.

Other Preparation Methods:

Although hexane is useful in the laboratory as an extraction solvent, it is generally difficult to sell outside of laboratory applications. In any case, normal hexane can be separated from many sources such as diesel, camping fuel and many solvent hydrocarbons. The general process for separating this material from solvent sources is fractional distillation at a temperature of 65 to 70 ° C. This is done by oxidation of the by-product under an oxidizing environment such as alcohols, alkenes and toluene. Redistillation of the solution is carried out to separate this material and certain isomers. The final product contains 50% by volume of the straight-chain isomer

Preparation of high purity normal hexane from raffinate recycling by absorption and distillation process:

In the absorption separation process, zeolite 5A is used for absorption. The raffinate contains 24.24% normal hexane. It is first absorbed in the rich raffinate oil in abnormal paraffin and then is rejected in the rich oil in normal paraffin. Under certain operating conditions, the concentration of n-hexane in the rich oil reaches more than 96%. The concentrations of 3-methylpentane and methylcyclopentane, which are the key light and heavy components in the normal hexane distillation tower, are reduced to 0.15 and 0.07, respectively. According to a simulation method, in a tower consisting of 15 stages, the concentration of normal hexane can reach 99.02% with a reflux ratio of 7.5. The combined process includes both absorption and distillation processes. This process has a very high efficiency compared to the previous traditional distillation processes for producing high purity normal hexane.

Process Considerations:

The boiling point of 3-methylpentane is 63.3°C and that of methylcyclopentane is 71.8°C. This temperature is very close to the boiling point of normal hexane, 68.7°C. Due to the closeness of the boiling point, a large number of plates are required to produce high purity hexane, and in this case, energy consumption is high. In the case of using two distillation columns with 90 float valve plates, the purity of normal hexane is less than 75%. It is estimated that 5 nanometers of steam are required to produce 1 ton of normal hexane in two boilers in the thermal integral method.

To reduce the cost of producing normal hexane, it is necessary to ensure the volatility difference between the key light and heavy components in the raffinate mixture.

What is normal hexane (n-hexane) and how is it obtained?

Normal hexane is a chemical substance extracted from crude oil. It is a colorless liquid that has a gasoline-like odor and one of its characteristics is that it is flammable. Normal hexane will catch fire if exposed to heat. Normal hexane is a cheap, relatively safe, and largely inactive solvent that evaporates easily and turns into vapor at a temperature of 20ºC and a pressure of 160hPa. Normal hexane is used to produce various items such as bags and shoes. This substance is a bit difficult to maintain. If you do not provide the right conditions for it, it will easily catch fire and can cause a fire.

 

Hexane Reactions

 

 

  • Burning reaction

Hexane readily undergoes a combustion reaction, producing water and carbon dioxide. You can see this chemical reaction below. This reaction is a strong indication that hexane is flammable and should not be stored in the presence of oxidizing agents.

2

  • Breakdown Reaction

Hexane undergoes a reaction to convert into hydrocarbons with a lower carbon number. This reaction is exothermic and is shown below.

Uses and Properties of Normal Hexane

One of the properties of normal hexane is that it is not suitable for household use. Most people who work in various industries use this substance and use it to make various materials. The most common uses of this chemical include:

  • It is also used as a solvent, paint thinner, and chemical reaction medium.
  • It is used to extract nonpolar compounds and calibrate devices.
  • It was used in the past as a denaturant in some alcohols.
  • It is also used as a nonpolar solvent in the chromatography process.
  • It is used in the automotive industry as a density regulator in the formation of tires.
  • N-hexane can be an additive in consumer products such as gasoline, glue, varnish, and ink.
  • Many laboratories use n-hexane to extract oil and grease from water and soil.
  • In pharmaceuticals, it is used as an agent to help form the geometric shape of tablets.
  • Normal hexane can be used to extract edible oils from oilseeds and vegetables.
  • It is used as a blowing agent in the production of polyurethane foam, polyethylene terephthalate foam, and acrylic plastic.
  • Due to the properties and characteristics of normal hexane, it can be used for cleaning and removing grease in various industries.
  • In the printing industry, this substance is used as a cleaner and in some ink formulations. Because this solvent is volatile and non-polar.

Is normal hexane harmful to health?

The properties of normal hexane are many, and one of its characteristics is that this substance is toxic. Exposure to normal hexane, whether long-term or short-term, can have negative effects on the human body. Short-term exposure to this substance can weaken the nerves and cause dizziness, nausea, headaches, and in severe cases, unconsciousness. Long-term exposure to this substance also has many side effects. Long-term exposure to air contaminated with normal hexane can have a negative and permanent effect on a person’s nervous system. Also, swallowing it by mistake can cause severe abdominal pain and breathing problems. Another characteristic of normal hexane is that if swallowed, it can cause problems such as burning mouth, coughing, sore throat and chest, and chemical pneumonitis. Of course, these symptoms appear when the person is not taken to the hospital. To prevent damage from normal hexane, we recommend that you use personal protective equipment (PPE) when working with this substance.

Safety tips when working with normal hexane

 

If you are forced to be exposed to normal hexane due to your working conditions, you must follow safety tips. To learn about the properties of normal hexane, we explained that this substance can harm the body. To minimize these damages, it is a good idea to use protective gloves, safety glasses, protective clothing and a mask. When you are near normal hexane, do not eat, drink or smoke.

After being exposed to air contaminated with normal hexane, be sure to pay attention to the following recommendations:

  • Respiratory: After you are finished working with normal hexane, be sure to go to an area with open air and take off your tight clothing. Since toxicity is one of the properties of normal hexane, we recommend that you do this. If a person loses consciousness after breathing this substance, be sure to give them artificial respiration and call the emergency services.
  • Eye damage: If some normal hexane gets into your eyes, be sure to rinse your eyes with clean water for 15 to 20 minutes. Never put ointments, medicines or oils in your eyes without a doctor’s prescription.
  • Skin contact: If normal hexane comes into contact with your skin, be sure to disinfect the affected area with soap and water and then dry it. After drying, cover the area with some antibacterial cream. If the substance is on your clothes, take off your clothes and wash them.
  • Swallowing: If you accidentally swallow the substance, try to vomit; because one of the properties of normal hexane is that it is toxic and harmful to the body. If you cannot vomit, drink one to two glasses of water to dilute it. If you see someone having a seizure or fainting due to eating normal hexane, put them in a sitting position and take them to the hospital immediately.

 

Types of normal hexane

 

Food Grade Normal Hexane (and Polymeric)
Normal hexane is mainly available in two grades in the Iranian market: industrial and food (polymeric). Food grade has a purity higher than 99% and very low levels of aromatic compounds (such as benzene) and is produced in accordance with strict standards for food and polymer uses.
Suitable for:
Extraction of edible oils (soybean, rapeseed, sunflower, etc.)
Production of sensitive and medical polymers such as special polypropylenes or polyolefins for hygienic applications
When is it critical to buy suitable food grade normal hexane?
1. In the food industry: Using substandard or highly impure normal hexane can contaminate edible oils, leave solvent in the final product, and threaten the health of the consumer.
2. In the production of sensitive polymers: The presence of even a trace of impurity (at ppm level) can seriously reduce the final properties of the polymer; Including unpleasant odor, product discoloration or loss of mechanical properties.

 

 

 

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