Product Description
Synonyms: Liquid paraffin, white mineral oil
CAS Registry Number: [8042-47-5]
Executive Standards: NB/SH0007-2015
Physical properties:
A colorless and transparent oily liquid with no odor. Relative density: 0.831-0.883, flash point: 164-223°C, kinematic viscosity (40°C): 49.13 mm2/s, acid value ≤ 0.05. It is stable to acid, light, and heat, insoluble in ethanol, soluble in ether, benzene, petroleum ether, and miscible with most fatty oils. It is a mixture of liquid hydrocarbons, mainly composed of a mixture of normal and isoalkanes ranging from C16 to C31.
Production method: Obtained from the high boiling fraction of petroleum distillation (i.e., lubricating oil fraction) through processes such as dewaxing, carbonization, neutralization, and refining with activated clay for decolorization.
Uses:
1. Used in industries such as chemical fiber and synthetic fiber as a lubricant, solvent, and coolant during textile production to make fibers and fabrics soft and bright.
2. Can also be used as a wetting agent, solvent, and lubricant in industries like synthetic resin and plastic processing.
Classification
1. Classification based on the composition of hydrocarbons:
1.1 Paraffin-based (straight-chain):
The white oil commonly used in the daily chemical industry is usually paraffin-based white oil. White oils produced from paraffinic mineral oils are typically high pour point white oils, while those produced from naphthenic mineral oils are usually low pour point white oils. When comparing the same aromatic content and viscosity in paraffin oil and naphthene oil, naphthene oil has a lower aniline point.
1.2 Naphthene-based:
Manufacturers of rubber products tend to use aromatic oils (i.e., aromatic-based oils) for polar rubber types such as NR and SBR, and paraffin-based oils for less polar rubber types such as EPDM and HR.
Note: The aniline point refers to the lowest temperature at which a uniform mixture of equal volumes of aniline and the solvent being tested becomes cloudy when gradually cooled. A higher aniline point of the solvent indicates a weaker ability to dissolve polar organic compounds.
2. Based on the purity and applications of saturated hydrocarbons:
2.1 Cosmetic Grade: Colorless and odorless. Suitable for cosmetics such as hair conditioner, hair oil, lipstick, facial oil, skincare oil, sunscreen oil, baby oil, snow cream, and other ointments and emollients. Also used in food and pesticides. Additionally utilized as lubricants for light machinery and precision instruments.
2.2 Industrial Grade: Categorized as colored and odorless, colorless with odor, and colored with odor. Used in industries such as chemical fiber and synthetic fiber for lubrication, solvents, and coolants during textile production, giving fibers and fabrics a soft and shiny finish. Also serves as wetting agents, solvents, and lubricants in industries like synthetic resins and plastic processing.
2.3 Pharmaceutical Grade
2.4 Food Grade: Colorless and odorless. Suitable for food applications such as glossing, anti-sticking, film removal, defoaming, sealing, polishing, rust prevention, lubrication of food machinery, surgical instruments, and extending the storage life of vinegar, fruits, vegetables, and canned goods.
3. Based on the measurement of dynamic viscosities at 40 degrees Celsius, the following classifications are made:
3.1 Grade 3: used for handicrafts.
3.2 Grade 5: used for handicrafts.
3.3 Grade 7: used for handicrafts.
3.4 Grade 10: cosmetics, textile auxiliaries.
3.5 Grade 15: cosmetics.
3.6 Grade 26: cosmetics, plastics, rubber, printing and dyeing, commonly used types.
Applications
1. Rubber and resin industry: In the production and processing of rubber such as PE, PS, PU, TPE, TPU, white oil is mainly used as a wetting agent, solvent, and lubricant.
2. Chemical fiber industry: White oil is used as a lubricant, solvent, and coolant in textile production, making fibers and fabrics soft and shiny. It also serves as a lubricant for textile machinery.
3. Food industry: White oil is primarily used for glossing, anti-sticking, defoaming, planing, sealing in food products. It serves as a release agent for foods like pasta, bread, biscuits, chocolate, extending the storage and freshness of wine, vinegar, fruits, vegetables, and canned goods. It is also used for lubricating food processing equipment.
4. Pharmaceutical industry: White oil is used as a base oil for lubricating laxatives, ointments, and pharmaceutical formulations, as a release agent for tablets and pills, and for corrosion protection and lubrication of surgical instruments and pharmaceutical machinery.
5. Pesticide industry: It can be used to control aphids on citrus trees, rust mites, scale insects, and scale insects on loquat and bayberry trees. After processing, it is an effective insecticide that works by closing the pores of adult insects or larvae, causing suffocation. It leaves no residues after long-term use, naturally decomposing into water and easily degradable substances, without leaving residues on crops.
6. Cosmetics industry: White oil is used as a base oil for hair creams, hair oils, lipsticks, face oils, skincare oils, sunscreens, baby oils, snowflake creams, and other ointments and emollients. As a base oil, white oil forms a film on the skin, providing a smooth and silky feeling, while also preventing the evaporation of skin moisture, offering moisturizing effects. The typical usage of white oil in cream products ranges from 2% to 12%, while in products like sunscreens and hair oils, it can go up to around 80%.