Process for isomerization of straight-chain olefins
A technology for the isomerization of linear olefins, applied in the field of isomerization of linear olefins, to achieve good isomerization activity and selectivity, and to meet the effect of isomerization processing
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preparation example 1
[0050] 1) Take 200g of ZSM-48 (silicon-aluminum ratio 80), disperse it into 600g NaOH solution with a concentration of 0.1M (the mass ratio of water to ZSM-48 is about 3:1), stir vigorously until the dispersion is uniform, and heat up to 40°C And keep the temperature for 2 hours, filter and wash until the pH value of the filtrate is less than 10, and dry the filter cake at 120°C to obtain a modified ZSM-48 molecular sieve;
[0051] 2) get 75g modified ZSM-48 molecular sieve, and 34.7g pseudo-boehmite (according to Al 2 o 3 Dry basis, Al 2 o 3 Content 72%) and water mix evenly (modified ZSM-48 molecular sieve: the weight ratio of pseudoboehmite is 3:1), while stirring in the kneader, slowly add 60g of dilute nitric acid solution (containing 3g of nitric acid, acid The weight ratio to the dry base powder is 0.03), wherein the weight ratio of the total water (the sum of the amount of water added and the water in the dilute nitric acid solution) to the dry base powder is 60, af...
preparation example 2
[0054] 1) Take 200g of ZSM-48 (silicon-aluminum ratio 60), disperse it into 400g NaOH solution with a concentration of 0.05M (the mass ratio of water to ZSM-48 is about 2:1), stir vigorously until the dispersion is uniform, and heat up to 50°C And keep the temperature for 1h, filter and wash until the pH value of the filtrate is less than 10, and dry the filter cake at 120°C to obtain a modified ZSM-48 molecular sieve;
[0055] 2) get 75g modified ZSM-48 molecular sieve and 34.7g pseudo-boehmite (according to Al 2 o 3 Dry basis, Al 2 o 3 content of 72%) and water (modified ZSM-48 molecular sieve: the weight ratio of pseudo-boehmite is 3:1), while stirring in the kneader, slowly add 60g of dilute phosphoric acid solution (containing 5g of phosphoric acid, acid The weight ratio to the dry base powder is 0.05), wherein the weight ratio of the total water to the dry base powder is 50, after stirring evenly, extrude with an extruder to obtain the initial sample of the strip cata...
preparation example 3
[0058] 1) Take 200g of ZSM-48 (silicon-aluminum ratio 150), disperse it into 1000g NaOH solution with a concentration of 0.08M (the mass ratio of water to ZSM-48 is about 5:1), stir vigorously until the dispersion is uniform, and heat up to 60°C And keep the temperature for 3 hours, filter and wash until the pH value of the filtrate is less than 10, and dry the filter cake at 120°C to obtain a modified ZSM-48 molecular sieve;
[0059] 2) get 75g modified ZSM-48 molecular sieve, and 34.7g pseudo-boehmite (according to Al 2 o 3 Dry basis, Al 2 o 3 Content 72%) and water mix evenly (modified ZSM-48 molecular sieve: the weight ratio of pseudoboehmite is 3:1), while stirring in the kneader, slowly add 80g of dilute nitric acid solution (containing 1g of nitric acid, acid The weight ratio to the dry base powder is 0.01), wherein the weight ratio of the total water amount (the sum of the amount of water added and the water amount in the dilute nitric acid solution) to the dry base...
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