Preparation method of vinyl acetate catalyst and vinyl acetate synthesis method
A technique for vinyl acetate and catalyst, which is applied in the preparation of vinyl acetate catalyst and the field of vinyl acetate synthesis, can solve the problems of low catalyst activity and selectivity, unfriendly environment, etc., achieve wide and cheap sources, increase active sites, and improve selectivity Effect
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Embodiment 1
[0021] (1) Catalyst preparation
[0022] Step (a): get the solution 1200ml that contains chloropalladic acid and chloroauric acid, wherein the content of palladium in the solution is 2.75g / L, and the content of gold is 0.625g / L, adding volume is that 1100ml diameter is 5.0mm spherical two Silica carrier, obtains catalyst carrier I;
[0023] Step (b): Add 27.5g of sodium silicate nonahydrate into 100ml of aqueous solution and add it to catalyst precursor I, mix well, let it stand for 24hrs, and then dry at 80°C for 8hrs to prepare catalyst precursor II; take 60g of dry ground Add the powdered citrus leaves to 1400ml distilled water, heat at 100°C for 10 minutes and filter to obtain the citrus leaf extract;
[0024] Step (c): After drying the catalyst precursor II, treat it with 1200ml of citrus orange leaf extract, the treatment temperature is 55°C, and the treatment time is 1h, to obtain the catalyst precursor III;
[0025] Step (d): The catalyst precursor III is impregnated...
Embodiment 2
[0039] (1) Catalyst preparation
[0040] Step (a): get the solution 1200ml that contains chloropalladic acid and chloroauric acid, wherein the content of palladium in the solution is 2.75g / L, and the content of gold is 0.625g / L, adding volume is that 1100ml diameter is 5.0mm spherical two Silica carrier, obtains catalyst carrier I;
[0041] Step (b): Add 27.5g of sodium silicate nonahydrate into 100ml of aqueous solution and add it to catalyst precursor I, mix well, let it stand for 24hrs, and then dry at 80°C for 8hrs to prepare catalyst precursor II; take 60g of dry ground Add the powdered yellow bark leaves to 1400ml distilled water, heat at 100°C for 10 minutes and filter to obtain the yellow bark leaf extract;
[0042] Step (c): After the catalyst precursor II is dried, treat it with 1200ml of the extract of the leaves of Pseudomonas bark, the treatment temperature is 55°C, and the treatment time is 1h, to obtain the catalyst precursor III;
[0043] Step (d): The cataly...
Embodiment 3
[0046] (1) Catalyst preparation
[0047] Step (a): get the solution 1200ml that contains chloropalladic acid and chloroauric acid, wherein the content of palladium in the solution is 2.75g / L, and the content of gold is 0.625g / L, adding volume is that 1100ml diameter is 5.0mm spherical two Silica carrier, obtains catalyst carrier I;
[0048] Step (b): Add 27.5g of sodium silicate nonahydrate to 100ml of aqueous solution and add it to catalyst precursor I, mix well, let it stand for 24hrs, and then dry at 80°C for 8hrs to prepare catalyst precursor II; take 30g of dry ground Add the powdered Citrus citrus leaves and 30g dried and powdered yellow bark leaves into 1400ml of distilled water, heat at 100°C for 10 minutes and filter to obtain a mixed extract of the two;
[0049]Step (c): After drying the catalyst precursor II, treat it with 1200ml of the mixed extract of citrus citrus leaves and yellow bark leaves, the treatment temperature is 55°C, and the treatment time is 1h, to ...
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