CN101584962A - High-strength FeOOH desulfurizer and preparation method thereof - Google Patents
High-strength FeOOH desulfurizer and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a high-strength FeOOH desulfurizer, which consists of 50 to 95 weight percent of amorphous FeOOH, 0 to 45 weight percent of carrier and 5 to 50 weight percent of organic binder, wherein the carrier is one or more of aluminium oxide, diatomite, natural zeolite and catalytic cracking spent catalyst; and the organic binder is one or more of sodium carboxymethyl cellulose, sesbania powder and cellulose powder. The invention further discloses a preparation method for the desulfurizer on the basis. The FeOOH desulfurizer prepared by the preparation method has high sulfur capacity, high mechanical strength and wider applicable desulfurization range.
Description
Technical field
The present invention relates to a kind of high-strength FeOOH desulfurizer, belong to the desulfurizing and purifying technical field with high Sulfur capacity.
Background technology
A lot of occasions in industrial production all can produce sulfide.Such as, producing in the production process of industrial chemicals with coal or oil, and general industry is produced in the waste water or waste gas of discharging.Wherein, producing with coal or oil in the production process of industrial chemicals, the hydrogen sulfide of its generation mainly is owing to contain more sulphur-containing substance in the raw material, make this sulphur-containing substance react in process of production and discharge hydrogen sulfide, thereby directly cause catalyst activity material poisoning and deactivation in the subsequent production workshop section.In addition, contained hydrogen sulfide sulfides in waste water that discharges in the industrial production or the waste gas if directly discharging can have a strong impact on environment, causes the person poultry poisoning even.
At present, the researcher is in order to reduce above-mentioned sulfide effectively to industrial production and environment damage, given enough attention for the research and development of desulfurizing agent.Desulfurizing agent kind of the prior art is a lot, and is most based on Fe-series desulfurizing agent, Mn oxide desulfurizing agent, solid base/liquid base desulfurizing agent, activated carbon desulphurization agent or molecular sieve carried reactive metal desulfurizing agent.Wherein, Fe-series desulfurizing agent is one of comparatively traditional desulfurizing agent, the type desulfurizing agent mainly is with the active component of ferriferous oxide as desulfurizing agent, described ferriferous oxide comprises tri-iron tetroxide, di-iron trioxide and hydrated ferric oxide, and the desulfurizing agent master active component majority in the Fe-series desulfurizing agent comprises two kinds or three kinds in the above-mentioned ferriferous oxide.Such as, the disclosed compound desulfurizing agent of american documentation literature US5102636A is exactly to be made of the iron oxide of 5～95wt% and the iron of 95～5wt%.
In addition, also have the partial desulfurization agent need on the basis of above-mentioned active component, add adhesive or expanding agent etc. in the described Fe-series desulfurizing agent.Such as, american documentation literature US6664210A discloses a kind of bonding metal oxide that can be used for removing impurity in the fluid, and this metal oxide can play the effect that removes hydrogen sulfide impurities equally; Bonding metal oxide described in the document comprises that molecular formula is Me
xO
yMetal oxide in one or more; Wherein, Me is selected from the periodic table metallic element in the 4th, 5,6,7 cycles; X is selected from 1～3, and y is selected from 1～4; In addition, above-mentioned bonding metal oxide also comprises the hydrate and the hydrophobic adhesive of above-mentioned metal oxide.Obviously, when Me selected Fe, disclosed bonding metal oxide was then by Fe in this patent documentation
3O
4, Fe
2O
3, Fe
2O
3H
2O and hydrophobic adhesive constitute.This bonding metal oxide is carried out Sulfur capacity test, show that this compressed metal oxide particle can keep the average magnitude of sulphur here and equal 10% of bonding metal oxide particle weight at least, be more preferably 30%, hold H
2The amount of S is at least every pound of metal oxide particle and holds 0.27 pound; As seen, the sulfur capacity of this bonding metal oxide (removing hydrogen sulfide) can only reach 27%～30%.
As seen, in the disclosed Fe-series desulfurizing agent prior art such as above-mentioned patent documentation, the Sulfur capacity of desulfurizing agent is generally all lower, and desulfurized effect is undesirable.In addition, above-mentioned Fe-series desulfurizing agent majority does not possess higher mechanical strength, removing in the hydrogen sulfide technology such as the refinery gas that contains moisture, liquefied gas, chemical fertilizer industry and Coal Chemical Industry production so, the powdered iron fimily desulfurizing agent that does not possess mechanical strength absorbs above-mentioned large quantity of moisture easily, thereby make the desulfurizing agent caking, reduce the specific area of desulfurizing agent, directly influenced the desulfuration efficiency of described desulfurizing agent.For adding the part binding agent, the Fe-series desulfurizing agent of roller forming, it has certain mechanical strength, if but the not enough certain standard of its mechanical strength, when it is applied to pot type filling desulfurization treatment process so, desulfurizing agent and tank body collision very likely because its insufficient strength causes desulfurizing agent chipping, thereby produce the dust of desulfurizing agent, this dust falls into tank base, increased the resistance of logistics, a jar internal pressure is increased, having influenced sulfur removal technology can't carry out.
Summary of the invention
To be solved by this invention is that the Fe-series desulfurizing agent Sulfur capacity is lower in the prior art, mechanical strength is not high, the unfavorable problem of desulfurized effect, and then a kind of Fe-series desulfurizing agent high-intensity, high Sulfur capacity that has is provided.
For solving the problems of the technologies described above, the invention provides a kind of FeOOH desulfurizer, this desulfurizing agent is made up of the carrier of amorphous FeOOH FeOOH, the 0～45wt% of 50～95wt%, the organic matter binding agent of 5～50wt%.Wherein, described carrier is one or more in alundum (Al, diatomite, natural zeolite, the catalytic cracking spent catalyst.Described organic matter binding agent is in methylcellulose sodium salt, sesbania powder, the cellulose powder one or more of contracting.
The present invention also further discloses the preparation method of above-mentioned desulfurizing agent, and it comprises the steps: (a) with solid solubility ferrous salt and solid hydroxide, is to mix in 1: 2～1: 3 by iron and mol ratio hydroxy; (b) step (a) gained mixed material is finished reaction by mixing to pinch, in described kneading process, the control temperature of charge is no more than 70 ℃; (c) step (b) gained product is dried in air; (d) to washing of step (c) gained material and filtration; (e) with step (d) gained solid air dry or oven dry; (f) material that obtains in the step (e) is mixed with the mixture of organic matter binding agent or carrier and organic matter binding agent and carry out mixed grind, add suitable quantity of water afterwards and carry out extruded moulding, above-mentioned article shaped is got final product in-5 ℃～45 ℃ following air dries or in 60 ℃～90 ℃ oven dry.
Described solid solubility ferrous salt is ferrous sulfate, ferrous nitrate or frerrous chloride; Described solid hydroxide is NaOH or potassium hydroxide.Wherein, described solid solubility ferrous salt is preferably ferrous sulfate heptahydrate, and described solid hydroxide is preferably NaOH.
Mixed pinching by kneader in the step (b) finished; The mixed time of pinching was at least 15 minutes.The preferred described mixed time of pinching is 15～30 minutes.The air dry temperature is-5 ℃～45 ℃ in the step (e), and bake out temperature is 60 ℃～90 ℃.Wherein said carrier is one or more in alundum (Al, diatomite, natural zeolite, the catalytic cracking spent catalyst; Described organic matter binding agent is in methylcellulose sodium salt, sesbania powder, the cellulose powder one or more of contracting.
The present invention has advantage as described below:
(1) desulfurizing agent of the present invention is an active component with amorphous FeOOH (FeOOH), Fe atom in this material is arranged in tetrahedron or the octahedral voids that oxygen atom forms, and the two has formed ownership and has been the unordered structure of shortrange order long-range on overall structure.This structure has extremely strong stability of carrying out combination with sulphur atom, and desulfurized effect is better.In above-mentioned active component, add an amount of appropriate carrier and organic matter binding agent, made full use of the bigger porosity of above-mentioned carrier, amorphous FeOOH (FeOOH) active component is fully disperseed and combine closely in pore passage structure, improved dispersion degree of active components on the one hand, also an amount of filling has been carried out in desulfurizing agent inside on the other hand, improved the mechanical strength of desulfurizing agent on the whole, avoided owing to the desulfurizing agent mechanical strength easily causes the cracked desulfurizing agent loss that causes inadequately.The mechanical strength that shows desulfurizing agent of the present invention after tested can be up to 184N/cm.
(2) desulfurizing agent of the present invention is an active component with amorphous FeOOH (FeOOH), oxygen atom in this material is the cubic closest packing structure, the Fe atom is arranged in tetrahedron or the octahedral voids that oxygen atom forms, and the two has formed ownership and has been the unordered structure of shortrange order long-range on overall structure.This structure has extremely strong stability of carrying out combination with sulphur atom, and desulfurized effect is better.Only add an amount of suitable organic matter binding agent in above-mentioned active component, the combination by this material has improved the combination power between above-mentioned amorphous FeOOH (FeOOH) active component, equally also can improve the mechanical strength of desulfurizing agent.
(3) the present invention adopts dry method, pinch solid solubility ferrous salt and solid hydroxide by mixing, thereby finish the reaction between the said two devices, prepare amorphous FeOOH, and by adding an amount of carrier and organic matter binding agent, by add water, extruded moulding prepares the FeOOH desulfurizer with certain mechanical strength of the present invention; In this preparation process, it has avoided the two reaction to generate Fe (OH) by the ratio between control solid solubility ferrous salt and the solid hydroxide
2With colloid Fe (OH)
3, further avoided the subsequent treatment problem of the filtration colloid that the generation owing to above-mentioned colloid brings; In addition, the present invention also by the temperature of charge in the strict control kneading process, guarantees that it is lower than 70 ℃, the amorphous FeOOH of generation thereby assurance solid solubility ferrous salt and solid hydroxide react; Avoid generating other oxide crystalline phase of the FeOOH or the iron of all the other crystalline phases, improved the stability of the amorphous FeOOH of active component; Of paramount importancely be, this preparation method has also further controlled the temperature of the extruded moulding thing being carried out air dry or oven dry, thereby guaranteed the stability of desulfurizer active component on the one hand, also guarantee the stable existence of organic matter binding agent on the other hand, thereby on the whole the mechanical strength that improves desulfurizing agent has been produced positive role.
(4) preparation method of FeOOH desulfurizer of the present invention, only need disposable feeding intake promptly can realize the mixing of solid solubility ferrous salt and solid hydroxide, and can prepare FeOOH desulfurizer by above-mentioned preparation method with certain mechanical strength, this method is simple and be convenient to operation, is particularly suitable for large-scale industrial production;
(5) use the method for preparing FeOOH desulfurizer of the present invention, the FeOOH desulfurizer for preparing has higher Sulfur capacity, test shows its can be up to 47.0%.
The specific embodiment
Embodiment 1
320g ferrous sulfate powder and 120g NaOH are mixed, and wherein, iron and mol ratio hydroxy are 1: 2.8; The said mixture material is put into kneader, pinch 3h and finish solid phase reaction between the above-mentioned reactant, above-mentioned product is placed in the air dries afterwards, be beneficial to fully finishing of above-mentioned reaction thereby mix.
Material after will drying adds water earlier and stirs, and cyclic washing uses centrifuge that above-mentioned cleaning solution is filtered till the gained filtrate sulfate radical-free (checking with barium chloride usually).
Above-mentioned solid behind washing and filtering is dried, and bake out temperature is 60 ℃, and drying time is 3h, can make amorphous FeOOH active component.
Take by weighing the above-mentioned amorphous hydroxyl oxidize iron powder 95g for preparing, and sesbania powder 5g mixes and carries out mixed grind, adds suitable quantity of water afterwards and carries out extruded moulding, and above-mentioned article shaped is dried in 80 ℃, drying time is 3h, promptly gets FeOOH desulfurizer A of the present invention.
Embodiment 2
640g ferrous sulfate powder and 212g NaOH are mixed, and wherein, iron and mol ratio hydroxy are 1: 2.4; The said mixture material is put into kneader, pinch 0.5h and finish solid phase reaction between the above-mentioned reactant, above-mentioned product is placed in the air dries afterwards thereby mix.
Material after will drying adds water earlier and stirs, and cyclic washing uses centrifuge that above-mentioned cleaning solution is filtered till the gained filtrate sulfate radical-free (checking with barium chloride usually).
Above-mentioned solid behind washing and filtering is carried out air dry, and baking temperature is-5 ℃, and be 10h drying time, can make amorphous FeOOH active component.
Take by weighing the above-mentioned amorphous hydroxyl oxidize iron powder 50g for preparing, and sesbania powder and cellulose powder 50g mix and carry out mixed grind, add suitable quantity of water afterwards and carry out extruded moulding, above-mentioned article shaped is dried in 60 ℃, drying time is 5h, promptly gets FeOOH desulfurizer B of the present invention.
Embodiment 3
342g ferrous nitrate powder and 234g potassium hydroxide are mixed, and wherein, iron and mol ratio hydroxy are 1: 2.0; The said mixture material is put into kneader, pinch 1.0h and finish solid phase reaction between the above-mentioned reactant, above-mentioned product is placed in the air dries afterwards thereby mix.
Material after will drying adds water earlier and stirs, and cyclic washing uses centrifuge that above-mentioned cleaning solution is filtered till the gained filtrate sulfate radical-free (checking with barium chloride usually).
Above-mentioned solid behind washing and filtering is carried out air dry, and baking temperature is 45 ℃, and be 3h drying time, can make amorphous FeOOH active component.
Take by weighing the above-mentioned amorphous hydroxyl oxidize iron powder 75g for preparing, and the methylcellulose sodium salt 25g that contracts mixes and carries out mixed grind, add suitable quantity of water afterwards and carry out extruded moulding, above-mentioned article shaped is carried out air dry until drying in 45 ℃, promptly get FeOOH desulfurizer C of the present invention.
Embodiment 4
640g ferrous sulfate powder and 220g NaOH are mixed, and wherein, iron and mol ratio hydroxy are 1: 2.5; The said mixture material is put into kneader, pinch 15min and finish solid phase reaction between the above-mentioned reactant, above-mentioned product is placed in the air dries afterwards thereby mix.
Material after will drying adds water earlier and stirs, and cyclic washing uses centrifuge that above-mentioned cleaning solution is filtered till the gained filtrate sulfate radical-free (checking with barium chloride usually).
Above-mentioned solid behind washing and filtering is dried, and bake out temperature is 80 ℃, and drying time is 3h, can make amorphous FeOOH active component.
Take by weighing the above-mentioned amorphous hydroxyl oxidize iron powder 50g for preparing, natural zeolite 45g and sesbania powder 5g mixing are also carried out mixed grind, add suitable quantity of water afterwards and carry out extruded moulding, above-mentioned article shaped is dried 3h in 70 ℃, promptly get FeOOH desulfurizer D of the present invention.
Embodiment 5
640g ferrous sulfate powder and 220g NaOH are mixed, and wherein, iron and mol ratio hydroxy are 1: 2.5; The said mixture material is put into kneader, pinch 2.0h and finish solid phase reaction between the above-mentioned reactant, above-mentioned product is placed in the air dries afterwards thereby mix.
Material after will drying adds water earlier and stirs, and cyclic washing uses centrifuge that above-mentioned cleaning solution is filtered till the gained filtrate sulfate radical-free (checking with barium chloride usually).
Above-mentioned solid behind washing and filtering is carried out air dry, and baking temperature is 30 ℃, and be 1h drying time, can make amorphous FeOOH active component.
Take by weighing the above-mentioned amorphous hydroxyl oxidize iron powder 50g for preparing, natural zeolite and diatomite 45g and sesbania powder 5g mixing are also carried out mixed grind, add suitable quantity of water afterwards and carry out extruded moulding, above-mentioned article shaped is dried 3h in 75 ℃, promptly get FeOOH desulfurizer E of the present invention.
Embodiment 6
640g ferrous sulfate powder and 220g NaOH are mixed, and wherein, iron and mol ratio hydroxy are 1: 2.5; The said mixture material is put into kneader, pinch 25min and finish solid phase reaction between the above-mentioned reactant, above-mentioned product is placed in the air dries afterwards thereby mix.
Material after will drying adds water earlier and stirs, and cyclic washing uses centrifuge that above-mentioned cleaning solution is filtered till the gained filtrate sulfate radical-free (checking with barium chloride usually).
Above-mentioned solid behind washing and filtering is carried out air dry, and baking temperature is 30 ℃, and be 1h drying time, can make amorphous FeOOH active component.
Take by weighing the above-mentioned amorphous hydroxyl oxidize iron powder 60g for preparing, alundum (Al 30g and sesbania powder and cellulose powder 10g mixing are also carried out mixed grind, add suitable quantity of water afterwards and carry out extruded moulding, above-mentioned article shaped is dried 3h in 80 ℃, promptly get FeOOH desulfurizer F of the present invention.
Embodiment 7
640g ferrous sulfate powder and 200g NaOH are mixed, and wherein, iron and mol ratio hydroxy are 1: 2.3; The said mixture material is put into kneader, pinch 30min and finish solid phase reaction between the above-mentioned reactant, above-mentioned product is placed in the air dries afterwards thereby mix.
Material after will drying adds water earlier and stirs, and cyclic washing uses centrifuge that above-mentioned cleaning solution is filtered till the gained filtrate sulfate radical-free (checking with barium chloride usually).
Above-mentioned solid behind washing and filtering is dried, and bake out temperature is 90 ℃, and drying time is 1h, can make amorphous FeOOH active component.
Take by weighing the above-mentioned amorphous hydroxyl oxidize iron powder 70g for preparing, alundum (Al 15g and the methylcellulose sodium salt 15g that contracts mixing are also carried out mixed grind, add suitable quantity of water afterwards and carry out extruded moulding, above-mentioned article shaped is dried 2h in 80 ℃, promptly get FeOOH desulfurizer G of the present invention.
Embodiment 8
920g ferrous sulfate powder and 280g NaOH are mixed, and wherein, iron and mol ratio hydroxy are 1: 2.2; The said mixture material is put into kneader, pinch 30min and finish solid phase reaction between the above-mentioned reactant, above-mentioned product is placed in the air dries afterwards thereby mix.
Material after will drying adds water earlier and stirs, and cyclic washing uses centrifuge that above-mentioned cleaning solution is filtered till the gained filtrate sulfate radical-free (checking with barium chloride usually).
Above-mentioned solid behind washing and filtering is carried out air dry, and baking temperature is 45 ℃, and be 1h drying time, can make amorphous FeOOH active component.
Take by weighing the above-mentioned amorphous hydroxyl oxidize iron powder 70g for preparing, catalytic cracking spent catalyst 15g and sesbania powder 15g mixing are also carried out mixed grind, add suitable quantity of water afterwards and carry out extruded moulding, above-mentioned article shaped is dried 2h in 85 ℃, promptly get FeOOH desulfurizer H of the present invention.
Embodiment 9
209g frerrous chloride powder and 217g NaOH are mixed, and wherein, iron and mol ratio hydroxy are 1: 3.0; The said mixture material is put into kneader, pinch 30min and finish solid phase reaction between the above-mentioned reactant, above-mentioned product is placed in the air dries afterwards thereby mix.
Material after will drying adds water earlier and stirs, and cyclic washing uses centrifuge that above-mentioned cleaning solution is filtered till the gained filtrate sulfate radical-free (checking with barium chloride usually).
Above-mentioned solid behind washing and filtering is carried out air dry, and baking temperature is 45 ℃, and be 1h drying time, can make amorphous FeOOH active component.
Take by weighing the above-mentioned amorphous hydroxyl oxidize iron powder 70g for preparing, natural zeolite and catalytic cracking spent catalyst 15g and sesbania powder 15g mixing are also carried out mixed grind, add suitable quantity of water afterwards and carry out extruded moulding, above-mentioned article shaped is dried 1.5h in 90 ℃, promptly get FeOOH desulfurizer I of the present invention.
In the foregoing description 1～9, employed ferrous sulfate powder is FeSO
47H
2O content is the raw material of industry of 88～90wt%; In the NaOH in the content of NaOH or the potassium hydroxide content of KOH be 90～93wt%; Baking step carries out in electric drying oven with forced convection; The model of employed kneader is the multifunction catalyst make-up machine of CD4 * 1TS, and certainly, any commercially available kneader that can realize the object of the invention all goes for the present invention.
Used carrier catalysis cracking dead catalyst in the above embodiment of the present invention, the active component to its inside does not limit, because the active component of dead catalyst inside lost efficacy, can't produce any effect to follow-up desulphurization reaction.Utilizing this material as carrier, only is in order to utilize its bigger porosity to realize active component dispersion thereon, so the catalytic cracking spent catalyst of any active component is all applicable to the present invention.
The activity rating example
Get each 5g of desulfurizing agent A～I that the foregoing description 1 to embodiment 9 prepares, under normal temperature (finger ring border temperature is generally-5 ℃ to 45 ℃) normal pressure (environmental pressure is generally 1 atmospheric pressure), with containing H
2S is that the standard gas of 40000ppm carries out evaluation test.Wherein, qualitative detection, but autogamy 1% liquor argenti nitratis ophthalmicus detects outlet sulphur; Quantitatively detect, can adopt the comprehensive Microcoulomb instrument of homemade WK-2C (Jiangsu Electrical Analysis Instrument Factory's production) to detect, the lowest detection amount of this instrument is 0.2ppm.Detection for the desulfurizing agent mechanical strength for preparing in the foregoing description is measured by its pressure measurement intensity is estimated, wherein particle radially anti-crushing power mean value press the HG/T2782 standard and carry out to measure.Testing result is as follows.
| The embodiment numbering | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| The desulfurizing agent numbering | A | B | C | D | E | F | G | H | I |
| Sulfur capacity (%) | 47.0 | 26.8 | 36.4 | 40.3 | 33.8 | 31.1 | 36.5 | 35.5 | 35.0 |
| Intensity (N/cm) | 70 | 184 | 153 | 84 | 87 | 127 | 143 | 138 | 135 |
From above-mentioned test result as can be seen, FeOOH desulfurizer of the present invention uses at normal temperatures and pressures, and its Sulfur capacity can be up to 47.0%, and its pressure measurement intensity can be up to 184N/cm.
, can clearly see in conjunction with above-mentioned test result by the foregoing description, in the binding agent of described interpolation, add the sesbania powder, can bring more excellent mechanical strength to FeOOH desulfurizer than adding other binding agent.
Though the present invention elaborates it by above-mentioned specific embodiment; but; the any form that does not exceed the claim protection domain that those skilled in the art should be understood that on this basis to be made and the variation of details all belong to invention which is intended to be protected.
Claims (11)
1. a high-strength FeOOH desulfurizer is characterized in that, described desulfurizing agent is made up of the carrier of amorphous FeOOH FeOOH, the 0～45wt% of 50～95wt%, the organic matter binding agent of 5～50wt%.
2. desulfurizing agent according to claim 1 is characterized in that, described carrier is one or more in alundum (Al, diatomite, natural zeolite, the catalytic cracking spent catalyst.
3. desulfurizing agent according to claim 1 is characterized in that, described organic matter binding agent is in methylcellulose sodium salt, sesbania powder, the cellulose powder one or more of contracting.
4. the preparation method of the described desulfurizing agent of claim 1, it comprises the steps:
(a), be to mix in 1: 2～1: 3 by iron and mol ratio hydroxy with solid solubility ferrous salt and solid hydroxide;
(b) step (a) gained mixed material is finished reaction by mixing to pinch, in described kneading process, the control temperature of charge is no more than 70 ℃;
(c) step (b) gained product is dried in air;
(d) to washing of step (c) gained material and filtration;
(e) with step (d) gained solid air dry or oven dry;
(f) material that obtains in the step (e) and organic matter binding agent or carrier and organic matter binding agent mixture are mixed and carry out mixed grind, add suitable quantity of water afterwards and carry out extruded moulding, above-mentioned article shaped is got final product in-5 ℃～45 ℃ following air dries or in 60 ℃～90 ℃ oven dry.
5. preparation method according to claim 4 is characterized in that, described solid solubility ferrous salt is ferrous sulfate, ferrous nitrate or frerrous chloride; Described solid hydroxide is NaOH or potassium hydroxide.
6. preparation method according to claim 5 is characterized in that, described solid solubility ferrous salt is a ferrous sulfate heptahydrate, and described solid hydroxide is preferably NaOH.
7. preparation method according to claim 4 is characterized in that, mixed the pinching by kneader in the described step (b) finished; The mixed time of pinching was at least 15 minutes.
8. preparation method according to claim 7 is characterized in that, the described mixed time of pinching is 15～30 minutes.
9. preparation method according to claim 4 is characterized in that, the air dry temperature is-5 ℃～45 ℃ in the step (e).
10. preparation method according to claim 4 is characterized in that, bake out temperature is 60 ℃～90 ℃ in the step (e).
11. preparation method according to claim 4 is characterized in that, described carrier is one or more in alundum (Al, diatomite, natural zeolite, the catalytic cracking spent catalyst; Described organic matter binding agent is in methylcellulose sodium salt, sesbania powder, the cellulose powder one or more of contracting.
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Application publication date: 20091125 Assignee: Beijing Sanju Chuangjie Technology Development Co.,Ltd. Assignor: BEIJING SANJU ENVIRONMENTAL PROTECTION & NEW MATERIALS Co.,Ltd. Contract record no.: 2012990000952 Denomination of invention: High-strength FeOOH desulfurizer and preparation method thereof Granted publication date: 20120718 License type: Exclusive License Record date: 20121228 |
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