Method for reducing ethanol in polysulfide silane coupling agent
A technology of silane coupling agent and polysulfide, which is applied in the field of reducing ethanol content in silane coupling agent, can solve problems such as the influence of rubber comprehensive performance, improve safety, benefit health and environmental protection, and reduce ethanol content Effect
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Embodiment 1
[0024] The method for reducing ethanol in the polysulfide silane coupling agent provided by the present embodiment may further comprise the steps:
[0025] Preparation of composite alumina catalyst:
[0026] (1) Disperse the X-type molecular sieve into 0.1mol / L cerium nitrate aqueous solution to carry out ion exchange reaction at 75°C, filter after 7 hours of reaction, wherein the mass ratio of molecular sieve to metal cerium=1:25, collect the solid phase, The solid phase was dried at 60°C for 3 hours, and then calcined at 450°C for 2 hours to obtain a cerium-modified molecular sieve;
[0027] (2) Mix the cerium-modified molecular sieve prepared in step (1) with alumina dry rubber powder in a ratio of 1:0.2 in mass ratio, then add an appropriate amount of silica sol and starch to form a mixture, and extrude the mixture Shaped, dried at 90°C for 2 hours, and then calcined at 300°C for 5 hours to obtain a composite alumina catalyst.
[0028] Reduction of ethanol in polysulfide...
Embodiment 2
[0032] The method for reducing ethanol in the polysulfide silane coupling agent provided by the present embodiment may further comprise the steps:
[0033] Preparation of composite alumina catalyst:
[0034] (1) Disperse type A molecular sieve into 0.3 mol / L yttrium nitrate aqueous solution at 100°C for ion exchange reaction, filter after 10 hours of reaction, wherein the mass ratio of molecular sieve to metal yttrium=1:15, collect the solid phase, The solid phase was dried at 70°C for 2.5 hours, and then calcined at 350°C for 3 hours to obtain yttrium-modified molecular sieves;
[0035] (2) Mix the yttrium-modified molecular sieve prepared in step (1) with alumina dry rubber powder in a ratio of 1:0.6 in mass ratio, then add an appropriate amount of silica sol and starch to form a mixture, and extrude the mixture Shaped, dried at 80°C for 3 hours, and then calcined at 400°C for 4 hours to obtain a composite alumina catalyst.
[0036] Reduction of ethanol in polysulfide sila...
Embodiment 3
[0040] The method for reducing ethanol in the polysulfide silane coupling agent provided by the present embodiment may further comprise the steps:
[0041] Preparation of composite alumina catalyst:
[0042] (1) Disperse the Y-type molecular sieve into 0.15mol / L lanthanum nitrate aqueous solution to carry out ion exchange reaction at 90°C, filter after reacting for 8h, wherein the mass ratio of molecular sieve to metal lanthanum=1:18, collect the solid phase, The solid phase was dried at 70°C for 3 hours, and then calcined at 400°C for 4 hours to obtain a lanthanum-modified molecular sieve;
[0043] (2) Mix the lanthanum-modified molecular sieve prepared in step (1) with the dry rubber powder of alumina in a mass ratio of 1:0.3, then add an appropriate amount of silica sol and starch to form a mixture, and extrude the mixture Shaped, dried at 75°C for 2 hours, and then calcined at 350°C for 5 hours to obtain a composite alumina catalyst.
[0044] Reduction of ethanol in poly...
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