| The dish can be divided according to the different fatty acids |
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| Span can be divided according to the different fatty acids. The fatty acid sorbitan is dehydrated sorbitol fatty acid ester, which is a mixture of ester compounds formed by the reaction of sorbitol and its monoanhydride and dianhydride with fatty acid, which is called span. Sorbitan is a viscous, white to yellow oily liquid or waxy solid. It is insoluble in water and soluble in ethanol. It is easy to hydrolyze under the action of acid, alkali and enzyme. Its HLB value ranges from 1.8 to 3.8. It is a common water in oil emulsifier. The dish can be divided according to the different fatty acids According to the different fatty acids, it can be divided into span 20 (laurisosorbide), span 40 (palmitone), span 60 (stearic acid), span 65 (tristearin), span 80 (sorbitan oleate) and span 85 (sorbitan trioleate). Span 60 is a yellowish to yellowish brown waxy solid with a slight odor. It is used as emulsifier and defoamer in pesticide, plastic, cosmetics, medicine, coating, textile, food and other industries. The HLB value was 4.7. Span 80 is a yellow oily liquid, which can be dispersed in warm water and ethanol. It is soluble in organic solvents such as propylene glycol, liquid paraffin, ethanol, methanol or ethyl acetate. HLB = 4.3. It is commonly used as emulsifier of water in oil emulsion. This product is mainly used as solubilizer or emulsifier for injection and oral liquid; dispersant for capsule; emulsifier and matrix for ointment; matrix for suppository, etc. It is used as emulsifier in food industry. In short, the difference between them is: 1. Span 60 is a yellowish waxy solid, and its chemical name is dehydrated sorbitol stearate; Span 80 is an amber viscous oil, and its chemical name is dehydrated sorbitol oleate. 2. Different raw materials, span 60 is stearic acid, and span 80 is the product of oleic acid reaction. 3. Span 60 is the esterification product of sorbitol and saturated fatty acid, and span 80 is the esterification product of sorbitol and unsaturated fatty acid. 4. Appearance difference: span 60 is solid at room temperature, while span 80 is liquid at room temperature. There are many kinds of dishes, so they are widely used. Sipan is used for emulsification of machinery, coating, chemical industry and explosive. It is used as emulsifier in heavy mud of oil drilling, emulsifier in food and cosmetics production, dispersant in paint and coating industry, stabilizer in titanium dioxide production, insecticide, wetting agent and emulsifier in pesticide production, cosolvent in petroleum products and antirust agent in anti rust oil. |
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