Leather degreasing agent based on ionic liquid and preparation method thereof
A technology of ionic liquid and degreasing agent, which is applied in the field of leather processing, can solve the problems of oil spots on finished products, large environmental pollution, and easy volatilization of organic solvents, and achieve the effects of improving effect and efficiency, simple preparation method, and easy industrialization
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[0029] The present invention also provides a kind of preparation method of the leather degreasing agent based on ionic liquid, it comprises the steps:
[0030] S1: Synthesis of ionic liquids:
[0031] S11: Dissolve 1-methylimidazole in ethanol, under the protection of inert gas, mix 1-chlorobutane or 1-
[0032] Add bromobutane dropwise to the above-mentioned ethanol solution of 1-methylimidazole, stir magnetically at 25°C to 35°C for 2 to 10
[0033] Hours, the reaction solution was cooled to 0°C;
[0034] S12: Extract the reaction solution with ethyl acetate, and obtain ionic liquids after drying and removing water
[0035] 1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) and 1-butyl-3-methylimidazolium bromide ([Bmim][Br]);
[0036] S2: Provide non-ionic surfactant, anionic surfactant and water,
[0037] S3: Mix one or more of the ionic liquids prepared in step S1 with the nonionic surfactant, anionic surfactant and water to obtain an ionic liquid-based leather degreas...
Embodiment 1
[0057] Production Method:
[0058] (1) 1-methylimidazole is dissolved in ethanol, under the protection of nitrogen, 1-chlorobutane is added dropwise in the above-mentioned solution, the molar ratio of 1-chlorobutane and 1-methylimidazole is 1.10, Magnetic stirring was performed at 30°C for 5 hours, the reaction solution was cooled to 0°C, extracted with ethyl acetate, and dried to obtain ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim][Cl]), relative to The yield of 1-methylimidazole was 92%.
[0059] (2) [Bmim] [Cl] is compounded with nonionic surfactant, anionic surfactant and water to prepare degreasing agent, and its specific composition formula is (total amount is calculated in 100 parts): 1-butyl-3- Methylimidazolium chloride ([Bmim]Cl): 5 parts; Pingpingjia O: 10 parts; sodium dodecylbenzenesulfonate (LAS): 15 parts; water: 75 parts, configured into 12.5kg of degreased Liquid, put into the drum and stir for 20min, set the temperature at 30°C, rotate at 20rpm,...
Embodiment 2
[0062] (1) Dissolve 1-methylimidazole in ethanol, under the protection of helium, add 1-bromobutane dropwise to the above solution, the molar ratio of 1-bromobutane to 1-methylimidazole is 1.2 , stirred magnetically at 30°C for 5 hours, cooled the reaction solution to 0°C, extracted with ethyl acetate, and dried to obtain ionic liquid 1-butyl-3-methylimidazolium bromide ([Bmim][Br]), The yield relative to 1-methylimidazole was 95%.
[0063] (2) [Bmim][Br] is compounded with nonionic surfactant, anionic surfactant and water to prepare a degreasing agent, and its specific composition formula is (the total amount is based on 100 parts): 1-butyl-3- Methylimidazolium bromide ([Bmim][Br]) 10 parts; Octylphenol polyoxyethylene ether OP-1: 11 parts, N,N-sodium oleoyl methylsulfonate (pancreatine plus bleach T): 8 parts ;Water: 71 parts, configured according to the proportion to make 10kg of degreasing agent, add it to the drum and stir for 20 minutes, set the temperature at 45°C, and...
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