Solid acid catalyst for catalyzing esterification reaction of pentaerythritol and stearic acid and preparation method of solid acid catalyst
A technology of solid acid catalyst and stearate, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, and can solve the problem of high yield of pentaerythritol stearate and high yield of pentaerythritol stearate. Low cost, complex catalyst preparation methods, etc., to achieve the effects of uniform grain size, rich acid content, and short preparation time
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Embodiment 1
[0026] With 4.29g zirconium nitrate (consumption is represented by ZrO 2 Calculation), 9.14g tetrapropyl ammonium hydroxide (TPAOH), 2.55g ammonia water (the amount is expressed as NH 3 Calculation), 9g deionized water, ZrO in molar ratio 2 :TPAOH:NH 3 :H 2 O=1:4.5:15:50 mixed, at room temperature with a stirring rate of 50r / min stirring for 1h, to obtain solution a; according to ZrO 2 :SnO 2 =1:2 molar ratio, with 5.34g sodium stannate (consumption is based on SnO 2 Calculation) and 10.8g deionized water, in molar ratio for SnO 2 :H 2 O=1:30 mixing, stirring at room temperature at a stirring rate of 50r / min for 1h to obtain solution b; adding solution b dropwise to solution a at a rate of 0.6mL / min, and stirring at a rate of 65°C Stir at 50r / min for 1h to form a sol-gel; transfer the sol-gel to a supercritical reactor, feed carbon dioxide gas into the reactor, and make the reactor reach a supercritical environment of 35°C and a pressure of 8MPa, and Keep for 5 hours, ...
Embodiment 2
[0028] With 4.29g zirconium nitrate (consumption is represented by ZrO 2 Calculation), 14.7g tetraethylammonium hydroxide (TEAOH), 3.4g ammonia water (the amount is expressed as NH 3 Calculation), 27g deionized water, ZrO in molar ratio 2 :TEAOH:NH 3 :H 2 O=1:10:20:150 mixing, stirring at room temperature at a stirring rate of 60r / min for 3h to obtain solution a; according to ZrO 2 :SnO 2 =1:5 mol ratio, with 9.5g stannous chloride (consumption is based on SnO 2 Calculation) and 40.5g deionized water, in molar ratio for SnO 2 :H 2 O=1:45 mixing, stirring at room temperature at a stirring rate of 60r / min for 3h to obtain solution b; adding solution b dropwise to solution a at a rate of 0.8mL / min, and stirring at a rate of 80°C Stir at 60r / min for 3h to form a sol-gel; transfer the sol-gel to a supercritical reactor, feed carbon dioxide gas into the reactor, and make the reactor reach a supercritical environment of 100°C and a pressure of 15MPa, and Keep it for 1h, filte...
Embodiment 3
[0030] With 3.27g zirconium acetate (consumption is represented by ZrO 2Calculation), 13.0g tetrabutylammonium hydroxide (TBAOH), 3.06g ammonia water (the amount is expressed as NH 3 Calculation), 18g deionized water, ZrO in molar ratio 2 :TEAOH:NH 3 :H 2 O=1:5:18:100 mixing, at room temperature, stirring at a stirring rate of 60r / min for 3h to obtain solution a; according to ZrO 2 :SnO 2 =1:3 mol ratio, with 5.7g stannous chloride (consumption is based on SnO 2 Calculation) and 27g deionized water, in molar ratio for SnO 2 :H 2 O=1:50 mixing, stirring at room temperature at a stirring rate of 70r / min for 2h to obtain solution b; adding solution b dropwise to solution a at a rate of 1.0mL / min, and stirring at a rate of 85°C Stir at 70r / min for 2h to form a sol-gel; transfer the sol-gel to a supercritical reactor, feed carbon dioxide gas into the reactor, and make the reactor reach a supercritical environment of 130°C and a pressure of 20MPa, and Keep for 5 hours, filte...
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