1. Oleic acid, together with various other fats, exists in all pet and also veggie oils in the form of glyceride. In animal fat, oleic acid make up regarding 40-50% of fats. The web content in grease differs considerably, it can be as high as 83% in tea oil, 54% in peanut oil, and just 5-6% in coconut oil. Oleic acid is a co-product of stearic acid production, and also both commercial stearic acid and also industrial oleic acid actually contain various other fatty acids. There are lots of oil resources for the manufacturing of stearic acid and also oleic acid. In industry, a combined oil formula is generally made use of, such as 30% melted tallow, 10% melted lard, 40% bone fat and 20% cottonseed oil. Among the blended fats gotten by refining and also hydrolyzing oils and fats, the melting points of saturated acids and also unsaturated acids are quite various. The return of stearic acid as well as oleic acid primarily depends on the formula of oil and also ester. Usually, 30-50% oleic acid and also 50-70% stearic acid can be obtained by chilly pushing. Hydrolyze with pet and also veggie oils and also emulsions at 105 ° C, cleanse with stearic acid, eliminate stearic acid by pushing when, different crude oleic acid, dehydrate, distill and also ice up. It is pushed once again to get rid of palmitic acid, and also finally dehydrated as well as fine-tuned to obtain the completed item. This technique can co-produce stearic acid, as well as likewise co-produce oleic acid when stearic acid is produced from oleic acid. Basic material consumption allocation: pet and grease 1950kg/t, sulfuric acid (98%) 210kg/t.
2. Use fats and also oils containing a particular amount of oleic acid as raw materials, such as tallow, lard, and hand oil, to decay fats, liquify and also cool down the fats with a solvent, and remove solid fatty acids to obtain crude oleic acid. Then dissolve it with a solvent, and cool it at a reduced temperature level to take shape the oleic acid.
Refining technique: Recrystallize with acetone at -10 ~ -60 ° C to different oleic acid from linoleic acid and saturated fatty acids. Recurring saturated fatty acids can be sped up by producing lead salts in ethanol, and after that refined by purification. Usually, commercially offered oleic acid can be taken shape with acetone at -11 ° C, as well as the crystals can be ground and also dried out in vacuum for one week. Various other refining approaches include: converting oleic acid right into methyl oleate, hydrolyzing the ester after fractional purification, and recrystallizing the complimentary acid with acetone at -40 ~ -45 ° C. Use 12 mL of acetone per 1 g of oleic acid. There is also a technique of fractional crystallization of the melt of oleic acid, adhered to by molecular purification as well as purification at a stress of 133.3 MPa.
3. Take oil and hydrolyze to acquire blended fatty acids, and also the fluid component gotten by chilly pressing is oleic acid, and also the saturated fatty acids in the solid component are eliminated. Acetone can be utilized as a solvent to acquire pure item.
4. Take on stearic acid co-production approach. When manufacturing stearic acid, the pressed unsaturated fat is additional icy as well as pushed to separate saturated fatty acid and then dried out. Or it can be gotten by saponifying, acidifying, separating and distilling soapstock when preparing grease.