CN109207192A - The desulfurizing method by adsorption of catalytically cracked gasoline - Google Patents

The desulfurizing method by adsorption of catalytically cracked gasoline Download PDF

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CN109207192A
CN109207192A CN201811347239.0A CN201811347239A CN109207192A CN 109207192 A CN109207192 A CN 109207192A CN 201811347239 A CN201811347239 A CN 201811347239A CN 109207192 A CN109207192 A CN 109207192A
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catalyst
adsorption
oxide
zinc
nickel
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CN109207192B (en
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陈开龙
庄琴珠
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Shanghai Youhao Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G45/00Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds
    • C10G45/02Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing
    • C10G45/04Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing characterised by the catalyst used
    • C10G45/12Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing characterised by the catalyst used containing crystalline alumino-silicates, e.g. molecular sieves
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00Catalysts comprising molecular sieves
    • B01J29/04Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/40Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
    • B01J29/42Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively containing iron group metals, noble metals or copper
    • B01J29/46Iron group metals or copper
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/10Feedstock materials
    • C10G2300/1037Hydrocarbon fractions
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/10Feedstock materials
    • C10G2300/1037Hydrocarbon fractions
    • C10G2300/104Light gasoline having a boiling range of about 20 - 100 °C
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/10Feedstock materials
    • C10G2300/1037Hydrocarbon fractions
    • C10G2300/1044Heavy gasoline or naphtha having a boiling range of about 100 - 180 °C
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/20Characteristics of the feedstock or the products
    • C10G2300/201Impurities
    • C10G2300/202Heteroatoms content, i.e. S, N, O, P
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/70Catalyst aspects
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2400/00Products obtained by processes covered by groups C10G9/00 - C10G69/14
    • C10G2400/02Gasoline

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Catalysts (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

The present invention relates to a kind of desulfurizing method by adsorption of catalytically cracked gasoline, using fixed bed reactors, gasoline is contacted with absorbing desulfurization catalyst, by weight percentage, catalyst includes: the zinc oxide of 25.0-50.0wt%, the nickel oxide of 0.5-25.0wt%, 2.0-55.0wt%ZSM-5 molecular sieve, the macroporous aluminium oxide of 20.0-50.0wt%, the cerium zirconium sosoloid of 1.0-25.0wt%;Reaction process condition are as follows: 280-400 DEG C of reaction temperature, reaction pressure 0.4-2.5MPa, volume space velocity 3-8h‑1, hydrogen to oil volume ratio 1-50.Catalyst working sulfur capacity is high, and loss of octane number is small, and regeneration and Reductive stability are good.

Description

The desulfurizing method by adsorption of catalytically cracked gasoline
Technical field
The present invention relates to a kind of desulfurizing method by adsorption of catalytically cracked gasoline.
Background technique
Gasoline absorbing desulfurization technology has become the important means of oil quality upgrading, which has high-sulfur selectivity, Loss of octane number is small, investment and the lower feature of operating cost.Existing adsorbent is using silicon/aluminum material as carrier, oxygen mostly Change the desulfuration adsorbent that zinc/active metal (such as nickel) is active component preparation, during the reaction due to carbon deposit and zinc sulphide, The formation of zinc silicate, zinc aluminate causes the reduction of adsorption activity, and regeneration reducing is needed to restore the activity of adsorbent.Due to alkene The generation of saturated reaction causes loss of octane number big.
Existing gasolene desulfurizing method by adsorption mainly comprises the steps that (1) desulfurization process: by sulfur-bearing hydrocarbon and hydrogen donor with Adsorbent is mixed, and is obtained the sulfur-bearing hydrocarbon of desulfurization and is carried the spent agent of sulphur;(2) regeneration treatment: by the spent agent for carrying sulphur It is mixed with oxygen-containing regeneration gas, obtains regenerative agent;(3) reduction treatment: the regenerative agent is mixed with reducing gas, is obtained To the reducing/regenerating agent used as sorbent circulation;And it flows back reducing/regenerating agent obtained in step (3) as adsorbent Sorbent circulation flow path is formed to step (1).With the continuous circulating reduction of adsorbent, regeneration, adsorbent often will appear brokenly The problem of broken (strength reduction) and activity decline, and then lead to the decline of desulfuration efficiency.
CN103657709A discloses a kind of reaction absorption desulfurization-aromatization technique and its catalyst.The catalyst exists When hydrorefining catalyst cracking gasoline feedstock not only have reaction absorption desulfurizing function, but also can coupling reaction absorption desulfurization it is anti- Should and aromatization so that the technique and its catalyst developed can reach when modifying to raw material catalytic cracking gasoline The octane number of product does not occur significantly to reduce while deep desulfuration.Using the FCC gasoline of sulfur content 300-800ppm as raw material, Reach product gasoline S content<10ppm, olefin(e) centent reduces by 10 percentage points, and RON loses<1, yield of gasoline>95%. CN101905161A is related to a kind of catalytic gasoline absorbing desulfurization catalyst and its preparation and application;Weight percent composition are as follows: Activated zinc oxide 10-85%, white carbon black 5-80%, aluminium oxide 5-30%, oxygen nickel 4-45%;(1) by titanium tetrachloride in nitrogen atmosphere Lower 1400 DEG C of pyrolytics obtain gas-phase silica;(2) activated zinc oxide, gas-phase silica, aluminium oxide and nickel salt are mixed equal It is even to be slurried;(3) mixture obtained by making is sprayed balling-up or oil forms ball;(4) make the particle drying of step (3), drying temperature is 110-150℃;(5) microballoon of step (4) is roasted, maturing temperature is 300-550 DEG C;The absorbing desulfurization catalyst of preparation, by force It spends, wearability is high, and what is had is desulphurizing activated, and loss of octane number is small, and operating cost is low, is very suitable to moving bed absorption desulfurization Technique.
CN108018069A discloses a kind of sulfur-bearing hydrocarbon desulfurizing method by adsorption and device, which comprises desulfurization process: Sulfur-bearing hydrocarbon and hydrogen donor are mixed with adsorbent, obtain the sulfur-bearing hydrocarbon of desulfurization and carry the spent agent of sulphur;Regeneration treatment: by institute The spent agent for stating load sulphur is mixed with oxygen-containing regeneration gas, obtains regenerative agent;Reduction treatment: by the regenerative agent and reducing gas It is mixed, obtains the reducing/regenerating agent used as sorbent circulation;Contain active metal monomer in the adsorbent, it is described to go back The reaction condition of original place reason includes: to contain the admixture of gas of non-hydrogen reducibility gas as also Primordial Qi, reduction temperature 250 ~420 DEG C, restore 0~3MPa of pressure, 50~1000h of volume space velocity of reducibility gas-1, the recovery time is 0.5~3h.The party Method inhibits the formation of the zinc silicate in reduction reaction and desulphurization reaction, and then improves the activity and intensity of regenerative agent. A kind of method that CN201310292325.7 discloses adsorbing and desulfurizing catalytic cracking gasoline, with urging after selective hydrodesulfurization Change gasoline is raw material (150 μ g/g of sulfur content <), first passes through fractionating column and carries out cutting fractionation, is fractionated as light petrol and heavy petrol. Light petrol enters fixed bed reactors and carries out non-hydrogen physical absorption desulfurization, and physical absorption desulfurization does not reduce olefin(e) centent, guarantees The octane number of product does not lose;Heavy petrol, which enters fixed bed reactors, to carry out facing hydrogen absorption desulfurization, reaction product and light petrol object Reason absorption desulfurization product reconciliation can reach the clean gasoline product of V sulphur index request of Europe.There are Sulfur capacity possibility for existing catalyst partially It is low, zinc silicate easy to form, zinc aluminate are regenerated and restored, causes the reduction of adsorption activity, and due to the hair of olefin saturation It is raw, lead to problems such as loss of octane number big.High therefore, it is necessary to develop a kind of working sulfur capacity, loss of octane number is small, regeneration and reduction Stability is good, adsorbs desulphurizing activated high catalyst and its sulfur removal technology.
Summary of the invention
The present invention provides a kind of desulfurizing method by adsorption of catalytically cracked gasoline, and catalyst Sulfur capacity is high, and loss of octane number is small, then Raw and Reductive stability is good, adsorbs desulphurizing activated height.
A kind of method for adsorbing and desulfurizing catalytic cracking gasoline, using fixed bed reactors, gasoline connects with absorbing desulfurization catalyst Touching, by weight percentage, catalyst includes: the zinc oxide of 25.0-50.0wt%, the nickel oxide of 0.5-25.0wt%, 2.0- 55.0wt%ZSM-5 molecular sieve, the macroporous aluminium oxide of 20.0-50.0wt%, the cerium zirconium sosoloid of 1.0-25.0wt%;React work Skill condition are as follows: 280-400 DEG C of reaction temperature, reaction pressure 0.4-2.5MPa, volume space velocity 3-8h-1, hydrogen to oil volume ratio 1-50.
Gasolene desulfurizing method by adsorption provided by the invention, fixed bed reactors can be fixed bed adiabatic reactor can also To be fixed bed isothermal reactor, preferably fixed bed adiabatic reactor;Further preferably, reaction process condition are as follows: reaction temperature 280-360 DEG C, reaction pressure 0.5-2.0MPa, volume space velocity 5-8h of degree-1, hydrogen to oil volume ratio 1-40.
A kind of preparation method of catalytic gasoline absorbing desulfurization catalyst includes the following steps: (1) by nickel salt, zinc salt It is dissolved in nitric acid, and expanding agent is added, obtain the acid solution containing nickel salt, zinc salt;(2) acid solution containing expanding agent is configured, it will ZSM-5 molecular sieve, macroporous aluminium oxide, cerium zirconium sosoloid are added in the acid solution containing expanding agent, stir evenly, and obtain containing ZSM-5 The mixture paste of molecular sieve, macroporous aluminium oxide, cerium zirconium sosoloid, in terms of oxide, the matter of expanding agent in the acid solution containing nickel zinc Measure percentage composition than containing ZSM-5 molecular sieve, macroporous aluminium oxide, cerium zirconium sosoloid mixture paste in expanding agent quality percentage The high 2 times or more of content;Then the acid solution containing nickel salt, zinc salt is added in the slurry obtained to step (2), adds alkaline solution, Carry out precipitation reaction;Be filtered, washed, dried after the reaction was completed, being formed, roast after obtain catalyst.
In above-mentioned method for preparing catalyst, the additional amount of expanding agent accounts for the 1- of nickel zinc oxide gross mass in step (1) 35%.
Catalyst is further improved, nickel salt, zinc salt are dissolved in deionized water, impregnate to catalyst surface, so Catalyst is obtained by drying, roasting, controls the zinc oxide in catalyst including 25.0-50.0wt%, 0.5-25.0wt%'s Nickel oxide.Catalyst surface nickel oxide, zinc oxide mass percentage content than catalytic inner nickel oxide, zinc oxide percentage Content is 0.1-2.0 times high.It is desulphurizing activated and selective to be conducive to raising Catalyst Adsorption, absorption desulfurization degree is high.Again through 8-10 times The catalyst that raw rear catalyst is desulphurizing activated and selectivity is more modified than unused nickel oxide, zinc oxide progress surface is high.
A kind of catalytic gasoline absorbing desulfurization catalyst, the quality percentage of the catalyst surface nickel oxide, zinc oxide It is 0.1-2.0 times higher than catalytic inner nickel oxide, zinc oxide mass percentage content than content.
Further preferably, a kind of catalytic gasoline absorbing desulfurization catalyst, by weight percentage, catalyst includes: The zinc oxide of 25.0-45.0wt%, the nickel oxide of 0.5-20.0wt%, 10.0-55.0wt%ZSM-5 molecular sieve, 20.0- The macroporous aluminium oxide of 40.0wt%, the cerium zirconium sosoloid of 1.0-20.0wt%.
The alkaline solution includes: one of sodium bicarbonate, ammonium hydrogencarbonate, sodium carbonate, sodium hydroxide, ammonium hydroxide or several Kind.The catalyst maturing temperature is 450-650 DEG C.
The preparation of cerium zirconium sosoloid: stoichiometrically weighing cerous nitrate, zirconium nitrate is placed in a beaker, and is configured to mix molten Liquid adds expanding agent, in the case where being stirred continuously, to mixed solution and dripping ammonium hydroxide or carbonic acid sodium solution, carries out coprecipitated It forms sediment and reacts, then filtered, dried, 800~950 DEG C roast 4~8 hours, then crush, are ground into powder.The addition of expanding agent Amount accounts for the 1-30% of cerium zirconium sosoloid quality.
Expanding agent of the present invention is methylcellulose, and active carbon, polyvinyl alcohol, urea is also possible to Sodium Polyacrylate; Polyacrylic acid;One or more of ammonium polyacrylate, preferably Sodium Polyacrylate.
Expanding agent is added in catalyst substep, and the catalyst has mesoporous, macroporous structure, nickeliferous in terms of metal oxide The mass percentage of expanding agent is starched than the mixture containing ZSM-5 molecular sieve, macroporous aluminium oxide, cerium zirconium sosoloid in the acid solution of zinc The high 2 times or more of the mass percentage of expanding agent in material is conducive to the working sulfur capacity for improving absorbing desulfurization catalyst, catalyst alkene Hydrocarbon saturation factor is low, and loss of octane number is low.
Catalyst of the present invention includes: the zinc oxide of 25.0-50.0wt%, the nickel oxide of 0.5-25.0wt%, 2.0- 55.0wt%ZSM-5 molecular sieve, the macroporous aluminium oxide of 20.0-50.0wt%, the cerium zirconium sosoloid of 1.0-25.0wt%, especially Cerium zirconium sosoloid is introduced into and (expanding agent is added in cerium zirconium sosoloid and ZSM-5 molecular sieve, macroporous aluminium oxide mixed process), effectively Inhibit zinc aluminate/zinc silicate generation in high temperature reduction and regenerative process, improves reduction, the regenerating stability of catalyst.This hair Sulphur in bright suitable removing catalytically cracked gasoline, absorbing desulfurization catalyst after 8 regeneration, urge by Sulfur capacity decline 2~7% Agent stability is good.
In order to illustrate measuring method of the present invention, by embodiment, the invention will be further elaborated, but this hair It is bright to be not limited to these embodiments.
Specific embodiment
All raw materials of the present invention come from commercial product.
Embodiment 1
The preparation of cerium zirconium sosoloid: stoichiometrically weighing 38.8g cerous nitrate, 33.9g zirconium nitrate is placed in a beaker, and matches Mixed solution is made, adds 4g Sodium Polyacrylate, in the case where being stirred continuously, to mixed solution and dripping ammonium hydroxide or carbonic acid Sodium solution carries out coprecipitation reaction, is then filtered, and dries, and 840 DEG C roast 6 hours, then crush, are ground into powder.
The preparation of catalyst: (1) 67.4g nickel nitrate, 136g zinc nitrate are dissolved in nitric acid, and 16g polypropylene is added Sour sodium obtains the acid solution containing nickel zinc;(2) acid solution of the Sodium Polyacrylate containing 5.5g is configured, 23g ZSM-5 molecular sieve, 17g is big Porous aluminum oxide, 5.7g cerium zirconium sosoloid be added the acid solution containing Sodium Polyacrylate in, stir evenly, obtain containing ZSM-5 molecular sieve, The mixture paste of macroporous aluminium oxide, cerium zirconium sosoloid;Then the acid solution containing nickel salt, zinc salt is added into mixture paste, then Sodium carbonate and ammonia spirit is added, carries out precipitation reaction, obtained reaction product temperature is increased to 90 DEG C of agings 5 hours, filter, Catalyst is obtained after washing, dry, molding, roasting.The composition of catalyst is shown in Table 1.
Embodiment 2
The preparation of cerium zirconium sosoloid in terms of metal oxide, contains with embodiment 1, the preparation step of catalyst with embodiment 1 The mass percentage of expanding agent is higher than the mixing containing ZSM-5 molecular sieve, macroporous aluminium oxide, cerium zirconium sosoloid in the acid solution of nickel zinc 3.2 times of the mass percentage of expanding agent in object slurry, the composition of catalyst is shown in Table 1.
Embodiment 3
The preparation of cerium zirconium sosoloid is with embodiment 1, and the preparation step of catalyst is with embodiment 1, in terms of oxide, contains nickel zinc Acid solution in expanding agent mass percentage be higher than containing ZSM-5 molecular sieve, macroporous aluminium oxide, cerium zirconium sosoloid mixture slurry 3.8 times of the mass percentage of expanding agent in material.After obtaining catalyst, configuration nickel salt, zinc salt are dissolved in deionized water, to urging Agent surface is impregnated, and then drying, roasting obtain the catalyst modified through nickel, zinc surface.The catalyst surface oxygen Change nickel, the mass percentage content of zinc oxide is higher than catalytic inner nickel oxide, 0.9 times of mass percentage content of zinc oxide. The composition of catalyst is shown in Table 1.
Embodiment 4
The preparation of cerium zirconium sosoloid is with embodiment 3, and the preparation step of catalyst is the same as embodiment 3, the catalyst surface oxygen Change nickel, the mass percentage content of zinc oxide is higher than catalytic inner nickel oxide, 1.5 times of mass percentage content of zinc oxide. The composition of catalyst is shown in Table 1.
1 embodiment of table/comparative example catalyst composition/wt%
Embodiment/comparative example Zinc oxide Nickel oxide ZSM-5 Macroporous aluminium oxide Cerium zirconium sosoloid
Embodiment 1 37 17.3 23 17 5.7
Embodiment 2 46 16 20 13 5.0
Embodiment 3 29 20 33 13.5 4.5
Embodiment 4 31 23 19 23.5 3.5
Comparative example 1
The preparation of catalyst: (1) 67.4g nickel nitrate, 136g nitric acid zinc salt are dissolved in nitric acid, and 16g poly- third is added Olefin(e) acid sodium obtains the acid solution containing nickel zinc;(2) acid solution for configuring the Sodium Polyacrylate containing 5.5g, by 23g ZSM-5 molecular sieve, 17g Macroporous aluminium oxide is added in the acid solution containing Sodium Polyacrylate, stirs evenly, and obtains containing ZSM-5 molecular sieve, macroporous aluminium oxide Mixture paste;Then the acid solution containing nickel salt, zinc salt is added into mixture paste, adds sodium carbonate and ammonia spirit, into Row precipitation reaction, obtained reaction product temperature are increased to 90 DEG C of agings 5 hours, after being filtered, washed, dry, forming, roasting To comparative catalyst 1.
Comparative example 2
The preparation of cerium zirconium sosoloid: stoichiometrically weighing 38.8g cerous nitrate, 33.9g zirconium nitrate is placed in a beaker, and matches Mixed solution is made, adds 4g Sodium Polyacrylate, in the case where being stirred continuously, to mixed solution and dripping ammonium hydroxide or carbonic acid Sodium solution carries out coprecipitation reaction, is then filtered, and dries, and 840 DEG C roast 6 hours, then crush, are ground into powder.
67.4g nickel nitrate, 136g nitric acid zinc salt: (1) being dissolved in nitric acid by the preparation of catalyst, and it is poly- that 21.5g is added Sodium acrylate obtains the acid solution containing nickel zinc;(2) 23g ZSM-5 molecular sieve, 17g macroporous aluminium oxide, 5.7g cerium zirconium sosoloid are added Enter in the acid solution containing nickel zinc, stir evenly, add sodium carbonate and ammonia spirit, carries out precipitation reaction, obtained reaction product Temperature is increased to 90 DEG C of agings 5 hours, be filtered, washed, dry, forming, roast after obtain comparative catalyst 2.
Using full fraction FCC gasoline, absorbing desulfurization catalyst and comparative example catalyst are evaluated, alkene in gasoline stocks Hydrocarbon content 38.5v%, sulfur content 127ppm, octane number 91.1.
It is evaluated using 100ml adiabatic reactor, catalyst or comparative catalyst are first restored with hydrogen, pressure 1.8MPa, bed temperature is first increased to 360 DEG C and is stopped 5 hours, then bed temperature is increased to 460 DEG C and is stopped 8 hours Reduction terminates.Evaluating catalyst process conditions: 330 DEG C of reactor inlet temperature, pressure 1.3MPa, air speed 5.5h-1, hydrogen oil volume Than 1.3, evaluation result is as shown in table 2.Catalyst desulfurizing rate is 90.8% or more, and loss of octane number is lower than 0.4, and working sulfur capacity is high In 27%, alkene saturation factor is lower than 15%.1 loss of octane number of comparative catalyst is big, and 2 desulfurization degree of comparative catalyst is low, octane number Loss is big, and working sulfur capacity is low.After absorption Sulfur capacity reaches saturation, regeneration treatment, work are carried out to catalyst or comparative catalyst Skill condition are as follows: in a nitrogen atmosphere, with the heating rate of 35 DEG C/h, be warming up to 260 DEG C, stop 7h;Regenerated catalyst later, institute It is the gaseous mixture of oxygen and nitrogen with regeneration gas, wherein oxygen volume content accounts for the 7% of total gas.
2 catalyst of table and comparative catalyst's reaction result
Catalyst 1 and 3 after regeneration, comparative example 1 and 2 are empty at 330 DEG C of reactor inlet temperature, pressure 1.3MPa Fast 5.5h-1, under the conditions of hydrogen to oil volume ratio 1.3, evaluation result is as shown in table 3.Catalyst desulfurizing effect can be substantially restored to newly Fresh dose of level effectively inhibits the generation of zinc silicate and zinc aluminate in high temperature reduction and regenerative process, improves the reduction, again of catalyst Raw stability.The activity decline after regeneration of comparative catalyst 1 and 2, loss of octane number is big, and working sulfur capacity reduces.Again by 8 times After life, 1 catalyst desulfurizing rate 84.1% of embodiment, Sulfur capacity decline 6%;3 catalyst desulfurizing rate 87.5% of embodiment, Sulfur capacity decline 3%.
3 catalyst of table and comparative catalyst's reaction result
Desulfurization degree/% Loss of octane number Working sulfur capacity/%
Embodiment 1 91.1 0.3 29
Embodiment 3 92.4 0.3 31
Comparative example 1 86.1 2.4 23
Comparative example 2 76.9 1.6 14

Claims (10)

1. a kind of desulfurizing method by adsorption of catalytically cracked gasoline, which is characterized in that use fixed bed reactors, gasoline and absorption are de- Sulfur catalyst contact, by weight percentage, catalyst includes: the zinc oxide of 25.0-50.0wt%, the oxygen of 0.5-25.0wt% Change nickel, 2.0-55.0wt%ZSM-5 molecular sieve, the macroporous aluminium oxide of 20.0-50.0wt%, the cerium zirconium solid solution of 1.0-25.0wt% Body;Reaction process condition are as follows: 280-400 DEG C of reaction temperature, reaction pressure 0.4-2.5MPa, volume space velocity 3-8h-1, hydrogen oil volume Compare 1-50.
2. the desulfurizing method by adsorption of catalytically cracked gasoline according to claim 1, which is characterized in that the absorption desulphurization reaction Process conditions are as follows: 280-360 DEG C of reaction temperature, reaction pressure 0.5-2.0MPa, volume space velocity 5-8h-1, hydrogen to oil volume ratio 1-40.
3. the desulfurizing method by adsorption of catalytically cracked gasoline according to claim 1, which is characterized in that the fixed bed reactors It is fixed bed adiabatic reactor or fixed bed isothermal reactor.
4. the desulfurizing method by adsorption of catalytically cracked gasoline according to claim 1, which is characterized in that the catalyst surface oxygen It is 0.1-2.0 higher than catalytic inner nickel oxide, zinc oxide mass percentage content to change nickel, the mass percentage content of zinc oxide Times.
5. the desulfurizing method by adsorption of catalytically cracked gasoline according to claim 1, which is characterized in that the absorption desulfurization catalyst The preparation method of agent includes the following steps: that nickel salt, zinc salt are dissolved in nitric acid by (1), and expanding agent is added, obtain containing nickel salt, The acid solution of zinc salt;(2) acid solution containing expanding agent is configured, ZSM-5 molecular sieve, macroporous aluminium oxide, cerium zirconium sosoloid addition are contained It in the acid solution of expanding agent, stirs evenly, obtains the mixture slurry containing ZSM-5 molecular sieve, macroporous aluminium oxide, cerium zirconium sosoloid Material, in terms of oxide, the mass percentage ratio of expanding agent contains ZSM-5 molecular sieve, macroporous aluminium oxide, cerium in the acid solution containing nickel zinc The high 2 times or more of the mass percentage of expanding agent in the mixture paste of zirconium solid solution;Then in the slurry obtained to step (2) The acid solution containing nickel salt, zinc salt is added, adds alkaline solution, carries out precipitation reaction;Be filtered, washed, dried after the reaction was completed, Catalyst is obtained after molding, roasting.
6. the desulfurizing method by adsorption of catalytically cracked gasoline according to claim 4, which is characterized in that the absorption desulfurization catalyst The preparation method of agent includes the following steps: that nickel salt, zinc salt are dissolved in nitric acid by (1), and expanding agent is added, obtain containing nickel salt, The acid solution of zinc salt;(2) acid solution containing expanding agent is configured, ZSM-5 molecular sieve, macroporous aluminium oxide, cerium zirconium sosoloid addition are contained It in the acid solution of expanding agent, stirs evenly, obtains the mixture slurry containing ZSM-5 molecular sieve, macroporous aluminium oxide, cerium zirconium sosoloid Material, in terms of oxide, the mass percentage ratio of expanding agent contains ZSM-5 molecular sieve, macroporous aluminium oxide, cerium in the acid solution containing nickel zinc The high 2 times or more of the mass percentage of expanding agent in the mixture paste of zirconium solid solution;Then in the slurry obtained to step (2) The acid solution containing nickel salt, zinc salt is added, adds alkaline solution, carries out precipitation reaction;Be filtered, washed, dried after the reaction was completed, Catalyst is obtained after molding, roasting;Then be further improved to catalyst: nickel salt, zinc salt are dissolved in deionized water, to catalysis Agent surface is impregnated, and then drying, roasting obtain finished catalyst, and controlling includes 25.0-50.0wt%'s in catalyst Zinc oxide, the nickel oxide of 0.5-25.0wt%.
7. according to the desulfurizing method by adsorption of any one of claim 5 or 6 catalytically cracked gasoline, which is characterized in that the cerium The preparation process of zirconium solid solution is as follows: stoichiometrically weighing cerous nitrate, zirconium nitrate is placed in a beaker, is configured to mix molten Liquid adds expanding agent, in the case where being stirred continuously, to mixed solution and dripping ammonium hydroxide or carbonic acid sodium solution, carries out coprecipitated It forms sediment and reacts, then filtered, dried, 800~950 DEG C of 4~8h of roasting, then crush, be ground into powder.
8. according to the desulfurizing method by adsorption of any one of claim 5 or 6 catalytically cracked gasoline, which is characterized in that the alkali Property solution include: one or more of sodium bicarbonate, ammonium hydrogencarbonate, sodium carbonate, sodium hydroxide, ammonium hydroxide, the catalyst roasting Burning temperature is 450-650 DEG C.
9. according to the desulfurizing method by adsorption of any one of claim 5 or 6 catalytically cracked gasoline, which is characterized in that the step Suddenly the additional amount of expanding agent accounts for the 1-35% of nickel zinc oxide gross mass in (1).
10. according to the desulfurizing method by adsorption of any one of claim 5 or 6 catalytically cracked gasoline, which is characterized in that the expansion Hole agent is one or more of Sodium Polyacrylate, polyacrylic acid, ammonium polyacrylate.
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