Some paraffins are edible. For example, the paraffin used in lipsticks and lipsticks is edible. If you know the home practice of food-grade paraffin, you know that some food-grade paraffin is made of honeycomb. In addition to honeycomb, food-grade paraffin can also be extracted from crude oil. No matter what kind of food-grade paraffin, all have a common application and main purpose.
Paraffin, also known as crystalline wax, is a nitrogen compound with a number of oxygen atoms of about 18 to 30. The key component is straight-chain ethane (about 80% to 95%), and there are also a small amount of ethane with some carbon bonds. Monocyclic cycloalkane with long main chain (the cumulative composition of the two is less than 20%). Paraffin is the grease fraction obtained by steam distillation of petroleum, which is specially prepared by organic solvent, dewaxed by solvent or crystallized by wax refrigeration, squeezed and dewaxed to obtain wax paste, and then degreased and supplemented with specially prepared lumps or fibers. crystals. According to the special level of production and processing, it can be divided into three types: fully refined paraffin, semi-refined paraffin and coarse paraffin.
Each wax is divided into different types according to the melting point, generally every 2 ℃, such as 52, 54, 56, 58 and other models. Crude paraffin has a high oil content and is mainly used for the production of matchsticks, plywood, and white canvas. Fully refined paraffin wax and semi-refined paraffin wax are mainly used in a wide range of applications. They are mainly used as ingredients and packaging products for food, oral medicines and some products (such as wrapping paper, watercolor paint, candles, carbon paper), and medical dressings for baking utensils. , used for fruit refrigeration, insulation layer of electrical components, improving the aging resistance and flexibility of vulcanized rubber, etc. It can also be converted into oleic acid by air oxidation.
Because of its high oil content, crude paraffin is mainly used for the production of matchsticks, plywood, and white canvas. After adding polyolefin preservative to paraffin, its melting point is improved, and its adhesion and flexibility are improved.
After the paper is infiltrated into paraffin, various packaging papers with excellent moisture-proof properties can be produced, which can be used for food, medicine and other packaging, rust-proof treatment of metal materials and printing industry; after adding pure cotton yarn to paraffin, It can make textile products soft, smooth and ductile; paraffin can also prepare detergents, demulsifiers, thickeners, tackifiers, lubricating greases, etc.
Fully refined paraffin wax and semi-refined paraffin wax are mainly used in a wide range of applications. They are mainly used as ingredients and packaging products for food, oral medicines and some products (such as wrapping paper, watercolor paint, candles, carbon paper), as well as medical dressings for baking utensils. , used for fruit refrigeration, insulation layer of electrical components, improving the aging resistance and flexibility of vulcanized rubber, etc. It can also be converted into oleic acid by air oxidation.
As a raw material of vaporization heat energy storage technology, paraffin has the advantages of large change of vaporization heat, small capacity change in the whole process of solid-to-high-efficiency liquid phase conversion, good heat resistance, no supercooling phenomenon, and relatively cheap price. In addition, the development trend of aviation, aerospace, microelectronics technology and optoelectronic technology usually stipulates that a lot of heat loss caused by high-power components during operation can only be dissipated in a limited total heat dissipation area and in a very short period of time. Melting point thermoelectric materials are relatively high melting point thermoelectric materials can quickly achieve melting point, flexible use of vaporization heat to complete temperature control, and relatively short thermal response speed Paraffin has many advantages that make it suitable for aerospace, and microelectronics. Technology and other new technology systems and their house environmental protection and energy saving have been widely used in all walks of life.
GB 2760-96 requires the use of gum base agent, which is limited to 50.0g/kg. It is also used overseas to remove glue produced by glutinous rice paper, and the usage amount is 6g/kg. In addition, it is also commonly used for waterproofing, anti-sticking and oil resistance of food packaging products. It is suitable for ingredients such as food bubble gum, chewing gum and pharmaceutical gold oil, and it is a heat carrier, mold release, tablet candy, lighting and other waxes that directly contact food and medicine (the wax-containing fraction of crude oil or shale oil is cold-pressed, etc).
