Paraffin
Pishgam Palayesh Force Company designs and manufactures liquid paraffin production plants in the industrial and sanitary paraffin rangem.
Liquid paraffin (liquid paraffin wax) or mineral oil, also known as white oil obtained from the distillation of petroleum derivatives and is refined and purified.
This oil is white or transparent, boils at 175 degrees Celsius and evaporates at 26 degrees. Mineral oil is also viscous and does not have fluorescence. That is, it does not exhibit luminescence due to external factors such as heat and radiation.
Industrial liquid paraffin:
This type of mineral, also known as kerosene, white kerosene, fuel oil, and lamp oil, has impurities compared to the sanitary type and has a smell similar to the smell of diesel fuel. This oil is used to lubricate industrial devices.
Sanitary liquid paraffin:
It is a pure, colorless, odorless, and tasteless oil and is used in laboratories for cosmetic and sanitary purposes.
White liquid paraffin production process:
1- Production of IsoRecycle from crude oil entering the refinery
After entering the refinery, crude oil undergoes dehydration and desalination. After preparation, the crude oil enters the Atmospheric Tower after heating. In this tower, light materials such as methane, ethane, propane, butane and heavier materials such as Light and heavy naphtha, Blending naphtha, white naphtha, Light gasoil, etc. are separated. After separating the materials from each other in this tower, the materials exiting from the bottom of the tower, which is the heaviest and is called Atmospheric residue, after increasing the temperature, enter another tower called Tower Vacuum, in which materials such as Heavy Gasoil, lube cut, Iso Feed, etc. are separated. Iso Feed enters the Hydrocracker Iso Max unit, in which this material is subjected to molecular isomerization under a pressure of about 190 bar and a temperature of about 400 degrees Celsius in the presence of a catalyst and hydrogen and is converted into middle distillation materials. During this process, a by-product is also produced, which is called Recycle Iso. This material is a mixture of paraffin and light wax, and if it enters the waxing unit, its paraffin and linear light wax are separated from each other.
2- Dewaxing (dewaxing)
IsoRecycle to separate light slack wax from industrial liquid paraffin (It is worth noting that IsoRecycle is a mixture consisting of paraffinic and isoparaffinic molecules with a small percentage of aromatic compounds, which is one of the products produced by the catalytic cracking process in the presence of hydrogen).
This unit consists of the following parts:
A- Solvent Mixing Section
B- Cooling Section
C- Filtration Section
D- Solvent Recovery Section
E- Compressor Section
First, the raw materials are heated to about 57 degrees Celsius, then the solvent KETON ETHYL METHYL is mixed with TOLUENE in a certain ratio with the feed. Then it is gradually cooled from 57 degrees Celsius to -1 degree Celsius. The cooling process must be carried out according to a specific curve so that wax crystals are gradually formed and oil is prevented from being trapped inside the crystals. After the crystals are formed, it is necessary to dilute the mixture so that it can be easily filtered. After filtering the two materials, MIX WAX SLACK and MIX OIL FREE WAX are obtained. After Solvent separation from them yields WAX and WFO.
3- Dearomaticization for the production of white liquid paraffin from industrial liquid paraffin:
For some purposes such as food and health applications, dearomaticization is carried out with greater intensity, and for some purposes such as plant and textile pest control applications, etc., dearomaticization is carried out with less intensity. In the standard method, liquid paraffin is mixed with a special solvent, then in settling tanks, the more aromatic phase and solvent are separated from the less aromatic phase, and the solvent is recycled by distillation and returned to the production cycle. After being freed from solvent, the upper less aromatic phase is sent to the acid washing unit, and in the presence of sulfuric acid, the remaining aromatics are converted into sulfonic acid, which is produced as a by-product and is used in the production of mold oil and soap water. The product of the acid washing unit is sent to the settling tanks to separate sulfonic acid. After separating the sulfonic acids, which have a higher density and are collected at the bottom of the tank, the upper phase is sent to a heated and stirred reactor for final neutralization and decolorization with Tonsil or bentonite, and finally filtration with a filter press is the end of the work.
B- Cooling Section
C- Filtration Section
D- Solvent Recovery Section
E- Compressor Section
First, the raw materials are heated to about 57 degrees Celsius, then the solvent KETON ETHYL METHYL is mixed with TOLUENE in a certain ratio with the feed. Then it is gradually cooled from 57 degrees Celsius to -1 degree Celsius. The cooling process must be carried out according to a specific curve so that wax crystals are gradually formed and oil is prevented from being trapped inside the crystals. After the crystals are formed, it is necessary to dilute the mixture so that it can be easily filtered. After filtering the two materials, MIX WAX SLACK and MIX OIL FREE WAX are obtained. After Solvent separation from them yields WAX and WFO.
3- Dearomaticization for the production of white liquid paraffin from industrial liquid paraffin:
For some purposes such as food and health applications, dearomaticization is carried out with greater intensity, and for some purposes such as plant and textile pest control applications, etc., dearomaticization is carried out with less intensity. In the standard method, liquid paraffin is mixed with a special solvent, then in settling tanks, the more aromatic phase and solvent are separated from the less aromatic phase, and the solvent is recycled by distillation and returned to the production cycle. After being freed from solvent, the upper less aromatic phase is sent to the acid washing unit, and in the presence of sulfuric acid, the remaining aromatics are converted into sulfonic acid, which is produced as a by-product and is used in the production of mold oil and soap water. The product of the acid washing unit is sent to the settling tanks to separate sulfonic acid. After separating the sulfonic acids, which have a higher density and are collected at the bottom of the tank, the upper phase is sent to a heated and stirred reactor for final neutralization and decolorization with Tonsil or bentonite, and finally filtration with a filter press is the end of the work.