![]() You can click on the below button to read a complete article about Paraffin Wax Types and Grades: The oil content of fully-refined paraffin wax is less than semi-refined paraffin wax.įully-refined paraffin wax is water-free, odorless, and has a solid structure that cannot be changed easily. The difference between them is in the oil content. German chemist “Karl Reichenbach” discovered paraffin wax in 1830. Paraffin wax has a general formula of (C nH 2n+2). It consists of a mixture of hydrocarbon molecules containing between 20 and 40 carbon atoms. All the physical properties of paraffin wax depends on the length of the hydrocarbon chain, the distribution of components like aromatics, and their degree of branching. The raw material of paraffin wax is gasoil or kerosene which is obtained from the distillation tower in the oil refinery. It is a byproduct of the oil refining process. In today's promotion of green, low-carbon, environmentally-friendly and energy-saving, the demand for the production of high melting point paraffin wax products by the sweating and deoiling process is even more urgent.Paraffin wax is a crystalline, soft, white, and solid material at room temperature. ![]() However, these improvements still do not produce high melting point paraffin wax products that meet the standards for semi-refined or fully refined products.Ĭompared with the solvent deoiling process, the sweating and deoiling process has the advantages of low investment, simple production process and low operating cost more importantly, the sweating and deoiling process is the only solventless deoiling method currently known for industrial scale production of paraffin products. An efficient paraffin sweat tank is improved in the sweating and deoiling process. Over the years, the sweating and deoiling process has been developed in production equipment and technology, such as vertical square multi-section separator sweat tank, paraffin sweat tank, tubular paraffin deoiling device, etc., improved on sweating and deoiling production equipment. At present, only some manufacturers use the sweating and deoiling process to produce soap wax and low melting wax paraffin. In particular, the oil content index cannot meet the technical and indicator requirements. Therefore, the common sweating and deoiling process is not suitable for the high melting point paraffin wax products that meet the semi-refined or fully refined product standards with a melting point of about 70 ☌. The oil content on the oil does not decrease with the decrease of the yield. Tests have shown that when the common sweating and deoiling process produces high melting point paraffin wax products with a melting point of about 70 ☌, even if the method of prolonging the sweating time and increasing the sweating end temperature is adopted, the oil content of the wax in the late stage of sweating has nothing to do with the yield, that is, wax. The common sweating and deoiling process can produce soap wax and low melting point paraffin wax having a melting point of 40 ☌ to 60 ☌, and is not suitable for producing a high melting point paraffin wax product having a melting point of about 70 ☌. Prolonging the sweating time will result in a long production cycle increasing the sweating termination temperature will cause some wax to be removed with the oil, resulting in a decrease in product yield. In order to meet the requirements of the final product oil content, it is common to use a method of prolonging the sweating time and increasing the sweating termination temperature. The wicking and degreasing method does not use a solvent in the production process, and it is only necessary to heat the raw material to a temperature above the melting point in the production process.įor the common sweating and deoiling method, the wax and oil components are in a solid and liquid state, respectively, during the warming and sweating process, but it is also difficult to completely separate. The wicking and deoiling method is carried out by utilizing different properties of the melting point of the wax and the oil. components of normal paraffins, small amounts of isoparaffins and naphthenes usually having a melting point of 50 ☌ to 74 ☌. Paraffin wax is produced by the steps of dewaxing, deoiling, refining and molding the lubricating oil fraction in crude oil, and generally contains C2. ![]() Petroleum wax is a general term for various wax products prepared from waxy distillates after refining, including liquid paraffin, paraffin and microcrystalline wax.
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