A kind of pre-hydrogenation treatment method of C4 alkylation raw material
A carbon tetraalkyl and treatment method technology, which is applied in the field of pretreatment of selective hydrogenation of butadiene, can solve the problems of deactivation, easy agglomeration and poisoning of active components, and can prolong the service life and improve the hydrogenation selection. Properties and stability, the effect of suitable acidity
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[0054] Embodiment uses the preparation of catalyst 1~6
[0055] Preparation of Catalyst C1:
[0056] Dilute 1L concentration to 200g Al 2 o 3 / L of sodium metaaluminate solution is placed in a stainless steel container with a stirrer and gas can be introduced into the bottom of the tank, the nickel nitrate solution is prepared and placed in a high-position container, a mixed gas of carbon dioxide and air is introduced, and the peristaltic pump is started at the same time Control the flow rate and drop the prepared nickel nitrate solution, the carbon dioxide concentration in the mixed gas is 60v%, and the flow rate is 4Nm 3 / h, the reaction temperature is 35°C, the pH value at the end of the reaction is 9.0, stop feeding carbon dioxide, age for 30 minutes, filter and separate the mother liquor, wash, and dry at 110°C for 6 hours to obtain nickel-containing pseudo-boehmite.
[0057] Mix and knead nickel-containing pseudo-boehmite with nitric acid, water, potassium carbonate, ...
Embodiment 1
[0083] Catalyst C1 was used, and the catalyst was reduced at 100°C for 6h under hydrogen atmosphere. The reaction inlet temperature is 48°C, the reaction pressure is 1.4MPa, and the liquid space velocity is 7h -1 , the molar ratio of hydrogen to butadiene is 5.0, and Table 2 is the composition of the materials before and after the reaction.
[0084] Material composition before and after table 2 reaction
[0085]
Embodiment 2
[0087] Catalyst C2 was used, and the catalyst was reduced at 80°C for 6h under hydrogen atmosphere. The reaction inlet temperature is 40°C, the reaction pressure is 1.2MPa, and the liquid space velocity is 8h -1 , the molar ratio of hydrogen to butadiene is 4.5, and Table 3 is the composition of the materials before and after the reaction.
[0088] Table 3 Composition of materials before and after reaction
[0089]
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