A kind of method utilizing vegetable oleic acid to synthesize dimer acid
A technology of vegetable oleic acid and dimer acid, applied in chemical instruments and methods, preparation of organic compounds, separation/purification of carboxylic acid compounds, etc., can solve the problem of low content and yield of dimer acid, long production cycle, and unfavorable environmental protection and other problems, to achieve the effect of increasing the catalytic effect, low cost, and increasing the dimer content
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Embodiment 1
[0020] Put 6000kg of cottonseed oleic acid, 480kg of clay, 15kg of lithium carbonate, and 150kg of nano-calcium into the polymerization reactor, stir and mix well, and heat to 190°C for 3 hours of polymerization under 3 atmospheres. After the polymerization is completed, transfer it to the acidification kettle, and add phosphoric acid at 180°C After 110kg acidification reaction for 1 hour, the crude dimer acid was obtained by filtration. The viscosity of the crude dimer acid was 1100mPa.s / 25°C, the conversion rate was 80%, and the color was 3#. The crude dimer acid was washed with water and centrifuged at 80°C to remove water, then separated into a short path distiller at 230°C and a vacuum of 25Pa to obtain dimer acid 6500mPa.s / 25°C, color 6#.
example 2
[0022] Put 6000kg of soybean oil, 450kg of white clay, 16kg of lithium carbonate, and 120kg of nano-calcium into the polymerization reactor, stir and mix well, heat it to 210°C for 2.5h under 3 atmospheres, transfer it to the acidification kettle after polymerization, and add it at 155°C 100kg of phosphoric acid was acidified for 1 hour and then filtered to obtain crude dimer acid. The viscosity of crude dimer acid was 1200mPa.s / 25°C, the conversion rate was 81%, and the color was 3#. The crude dimer acid was washed with water and centrifuged at 90°C to remove water, and separated into a short-path distiller at 230°C and a vacuum of 20Pa to obtain dimer acid 7000mPa.s / 25°C, color 5.5#.
example 3
[0024] Put 6000kg of tall oil acid, 500kg of clay, 15.5kg of lithium carbonate, and 140kg of nano-calcium into the polymerization reactor, stir and mix well, and heat it to 200°C for 2 hours under 3 atmospheres. Add 105kg of phosphoric acid for acidification reaction for 1 hour and then filter to obtain crude dimer acid. The viscosity of crude dimer acid is 1000mPa.s / 25°C, the conversion rate is 80.5%, and the color is 3#. The crude dimer acid was washed with water and centrifuged at 85°C to remove water, and then separated into a short path distiller at 230°C and a vacuum of 30Pa to obtain dimer acid 6800mPa.s / 25°C, color 6#.
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