Cleaning method of full-range FCC (Fluid Catalytic Cracking) gasoline

Abstract

The invention relates to a cleaning method of full-range FCC (Fluid Catalytic Cracking) gasoline. The cleaning method comprises the following process: firstly, removing alkadiene in the full-range FCC(Fluid Catalytic Cracking) gasoline through a prehydrogenation reactor; then, carrying out hydro-adsorption desulfurization on a prehydrogenation product, thus removing sulfide; then carrying out isomerization on reaction effluent under the action of an olefin isomerization catalyst by using a weakly acidic mesoporous H-shaped Zn-ZSM-5 molecular sieve or an improved weakly acidic mesoporous H-shaped Zn-ZSM-5 molecular sieve as a carrier, thus converting olefin into isohydrocarbons, wherein an isomerization reaction product is clean gasoline meeting national standard VI.

Description

technical field

[0001] The invention relates to the field of catalytic cracking gasoline, in particular to a method for cleaning whole fraction catalytic cracking gasoline. Background technique

[0002] The cleaning of FCC gasoline is mainly completed by FCC gasoline post-treatment technology, mainly including hydrodesulfurization technology, hydrogen adsorption desulfurization technology, oxidation desulfurization technology, extraction desulfurization technology and biodegradation desulfurization technology, etc., hydrodesulfurization and hydrogen adsorption desulfurization technology Due to the maturity of the technology, it will still be the mainstream technology of FCC gasoline cleaning at present or for a period of time in the future.

[0003] Hydrodesulfurization is a process to clean FCC gasoline under the condition of hydrogen. The current mainstream hydrodesulfurization technology adopts pre-hydrogenation of whole-fraction FCC gasoline-cutting of light and heavy fr...

Examples

Embodiment 1

[0040] The raw material is FCC gasoline, and its composition is shown in Table 1.

[0041] The FCC gasoline composition in the embodiment 1 of table 1

[0042]

[0043] FCC gasoline is firstly processed through a pre-hydrogenation reactor to remove diolefins, the reaction temperature is 100°C, the reaction pressure is 1.5MPa, and the liquid volume space velocity is 6h -1 , the volume ratio of hydrogen to oil is 4:1. The catalyst composition is MoO 3 6%, NiO 13% and γ-Al 2 o 3 81%.

[0044] The obtained product undergoes deep desulfurization through the adsorption desulfurization unit, the operating temperature is 400°C, the operating pressure is 2MPa, and the weight hourly space velocity is 4h -1 , the adsorbent is a composite oxide catalyst (by mass, containing 80% zinc oxide, 15% nickel oxide and 5% aluminum oxide).

[0045] Finally, the desulfurized product is subjected to olefin isomerization, the reaction temperature is 300°C, the reaction pressure is 2.0MPa, a...

Embodiment 2

[0052] Raw material is identical with the raw material in embodiment 1.

[0053] FCC gasoline is firstly processed through a pre-hydrogenation reactor, the reaction temperature is 120°C, the reaction pressure is 2MPa, and the liquid volume space velocity is 4h -1 , the volume ratio of hydrogen to oil is 5:1, and the catalyst composition is MoO 3 8%, NiO 15%, K 2 O 1%, La 2 o 3 1% and γ-Al 2 o 3 75%.

[0054] The obtained product undergoes deep desulfurization through the adsorption desulfurization unit, the operating temperature is 450°C, the operating pressure is 3MPa, and the weight hourly space velocity is 6h -1 The adsorbent is an activated carbon-based adsorbent (by weight, containing 88% of activated carbon and 12% of zinc oxide).

[0055] Finally, the desulfurized product is subjected to olefin isomerization, the reaction temperature is 350°C, the reaction pressure is 3.0MPa, and the weight hourly space velocity is 6h -1 , The volume ratio of hydrogen to oil i...

Embodiment 3

[0062] Raw material is identical with the raw material in embodiment 1.

[0063] FCC gasoline is first processed through a pre-hydrogenation reactor, the reaction temperature is 150°C, the reaction pressure is 2.5MPa, and the liquid volume space velocity is 4h -1 , the volume ratio of hydrogen to oil is 6:1, and the catalyst composition is MoO 3 9%, NiO13%, K 2 O 4%, La 2 o 3 1% and γ-Al 2 o 3 73%.

[0064] The above products undergo deep desulfurization through the adsorption desulfurization unit, the operating temperature is 380°C, the operating pressure is 3.5MPa, and the weight hourly space velocity is 3h -1 The adsorbent is a molecular sieve-based adsorbent (by weight, containing 75% of Y-type molecular sieve and 25% of mordenite).

[0065] Finally, the desulfurized product is subjected to olefin isomerization, the reaction temperature is 200°C, the reaction pressure is 4.5MPa, and the weight hourly space velocity is 2h -1 , the volume ratio of hydrogen to oil i...

technical field

[0001] The invention relates to the field of catalytic cracking gasoline, in particular to a method for cleaning whole fraction catalytic cracking gasoline. Background technique

[0002] The cleaning of FCC gasoline is mainly completed by FCC gasoline post-treatment technology, mainly including hydrodesulfurization technology, hydrogen adsorption desulfurization technology, oxidation desulfurization technology, extraction desulfurization technology and biodegradation desulfurization technology, etc., hydrodesulfurization and hydrogen adsorption desulfurization technology Due to the maturity of the technology, it will still be the mainstream technology of FCC gasoline cleaning at present or for a period of time in the future.

[0003] Hydrodesulfurization is a process to clean FCC gasoline under the condition of hydrogen. The current mainstream hydrodesulfurization technology adopts pre-hydrogenation of whole-fraction FCC gasoline-cutting of light and heavy fr...

Examples

Embodiment 1

[0040] The raw material is FCC gasoline, and its composition is shown in Table 1.

[0041] The FCC gasoline composition in the embodiment 1 of table 1

[0042]

[0043] FCC gasoline is firstly processed through a pre-hydrogenation reactor to remove diolefins, the reaction temperature is 100°C, the reaction pressure is 1.5MPa, and the liquid volume space velocity is 6h -1 , the volume ratio of hydrogen to oil is 4:1. The catalyst composition is MoO 3 6%, NiO 13% and γ-Al 2 o 3 81%.

[0044] The obtained product undergoes deep desulfurization through the adsorption desulfurization unit, the operating temperature is 400°C, the operating pressure is 2MPa, and the weight hourly space velocity is 4h -1 , the adsorbent is a composite oxide catalyst (by mass, containing 80% zinc oxide, 15% nickel oxide and 5% aluminum oxide).

[0045] Finally, the desulfurized product is subjected to olefin isomerization, the reaction temperature is 300°C, the reaction pressure is 2.0MPa, a...

Embodiment 2

[0052] Raw material is identical with the raw material in embodiment 1.

[0053] FCC gasoline is firstly processed through a pre-hydrogenation reactor, the reaction temperature is 120°C, the reaction pressure is 2MPa, and the liquid volume space velocity is 4h -1 , the volume ratio of hydrogen to oil is 5:1, and the catalyst composition is MoO 3 8%, NiO 15%, K 2 O 1%, La 2 o 3 1% and γ-Al 2 o 3 75%.

[0054] The obtained product undergoes deep desulfurization through the adsorption desulfurization unit, the operating temperature is 450°C, the operating pressure is 3MPa, and the weight hourly space velocity is 6h -1 The adsorbent is an activated carbon-based adsorbent (by weight, containing 88% of activated carbon and 12% of zinc oxide).

[0055] Finally, the desulfurized product is subjected to olefin isomerization, the reaction temperature is 350°C, the reaction pressure is 3.0MPa, and the weight hourly space velocity is 6h -1 , The volume ratio of hydrogen to oil i...

Embodiment 3

[0062] Raw material is identical with the raw material in embodiment 1.

[0063] FCC gasoline is first processed through a pre-hydrogenation reactor, the reaction temperature is 150°C, the reaction pressure is 2.5MPa, and the liquid volume space velocity is 4h -1 , the volume ratio of hydrogen to oil is 6:1, and the catalyst composition is MoO 3 9%, NiO13%, K 2 O 4%, La 2 o 3 1% and γ-Al 2 o 3 73%.

[0064] The above products undergo deep desulfurization through the adsorption desulfurization unit, the operating temperature is 380°C, the operating pressure is 3.5MPa, and the weight hourly space velocity is 3h -1 The adsorbent is a molecular sieve-based adsorbent (by weight, containing 75% of Y-type molecular sieve and 25% of mordenite).

[0065] Finally, the desulfurized product is subjected to olefin isomerization, the reaction temperature is 200°C, the reaction pressure is 4.5MPa, and the weight hourly space velocity is 2h -1 , the volume ratio of hydrogen to oil i...

Images