A tungsten-based hydrotalcite hydrodesulfurization catalyst free of presulfurization and its preparation method
A pre-sulfurized water, hydrodesulfurization technology, applied in physical/chemical process catalysts, chemical instruments and methods, petroleum industry, etc., can solve the problems of complex preparation of pre-sulfur-free catalysts, complicated pre-sulfurization process, etc., and shorten the processing cycle. , the preparation method is simple, the effect of high hydrodesulfurization activity
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Embodiment 1
[0030] Weigh Ni(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O and dissolved in boiled deionized water, set the volume to 100mL, and prepared a mixed salt solution with the total concentration of two metal salts being 1mol / L; weigh 8.0g NaOH and dissolve it in boiled deionized water, set the volume to 100mL, Prepare a 2mol / L alkali solution as a precipitant; pour the mixed salt solution into a 250mL flask, and stir magnetically; then add the alkali solution dropwise, when the pH of the solution is 8, stop adding the alkali solution and continue stirring for 0.5h; then The resulting mixed solution was poured into a hydrothermal reaction kettle and reacted at 100°C for 12 hours; the obtained precipitate was washed several times with deionized water until the washing solution was neutral; then the filtrate was vacuum-dried at 80°C for 6 hours; the obtained sample was Nitrate-type nickel aluminum hydrotalcite (Ni 2 Al-NO 3 -LDH).
Embodiment 2
[0032] Weigh Ni(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O, and dissolved in boiled deionized water, set the volume to 100mL to prepare a mixed salt solution with the total concentration of the two metal salts being 1mol / L; weigh 8.0g NaOH and dissolve it in boiled deionized water, set the volume to 100mL, configure A 2mol / L alkali solution was used as a precipitant; the mixed salt solution was poured into a 250mL flask, and magnetically stirred; then the alkali solution was added dropwise, and when the pH of the solution was 9, the dropwise addition of the alkali solution was stopped and stirring continued for 0.5h; then the The resulting mixed solution was poured into a hydrothermal reaction kettle and reacted at 120°C for 8 hours; the obtained precipitate was washed several times with deionized water until the washing liquid was neutral; then the filtrate was vacuum-dried at 80°C for 6 hours; the obtained sample was nitric acid Root-type nickel aluminum hydrotalcite (Ni ...
Embodiment 3
[0034] Weigh Ni(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O, and dissolved in boiled deionized water, set the volume to 100mL, and prepared a mixed salt solution with the total concentration of the two metal salts being 1mol / L; weigh 4.0g NaOH and dissolve it in boiled deionized water, set the volume to 100mL , prepared into a 1mol / L alkali solution as a precipitant; pour the mixed salt solution into a 250mL flask, and magnetically stir; then add the alkali solution dropwise, when the pH of the solution is 7, stop adding the alkali solution and continue stirring for 0.5h; The resulting mixed solution was then poured into a hydrothermal reactor and reacted at 110°C for 15 hours; the obtained precipitate was washed several times with deionized water until the washing solution was neutral; then the filtrate was vacuum-dried at 80°C for 6 hours; the obtained sample Nitrate-type nickel-aluminum hydrotalcite (NiAl-NO 3 -LDH).
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