CN103769171A - Preparation method of sulfurization type hydro-treatment catalyst - Google Patents
Preparation method of sulfurization type hydro-treatment catalyst Download PDFInfo
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Abstract
The invention discloses a preparation method of a sulfurization type hydro-treatment catalyst. The preparation method comprises the following steps: adding water into carrier powder, evenly mixing and pulping so as to obtain slurry (d), adding an ammonium molybdate and/or ammonium tungstate solution (a), an ammonium sulphide solution (b) and a nickel salt and/or cobalt salt solution (c) into the slurry (d) to carry out reactions, filtering, washing, then drying the reaction product in the protection of inert gas, adding an adhesive, carrying out a kneading treatment, extruding the product into strips, drying in the protection of inert gas, and finally burning so as to obtain the sulfurization type hydro-treatment catalyst. The preparation method assists the active metal to be evenly dispersed on the catalyst surface, moreover the method is easy to generate an II type Ni(Co)Mo(W)S active phase with a higher catalytic activity, thus the vulcanization degree of the catalyst is high, the utilization rate of active metal is high, and thus the hydrogenation performance of the catalyst is improved.
Description
Technical field
The present invention relates to a kind of sulfurized hydrogenation and process the preparation method of catalyst.
Background technology
Current industrialized hydrotreating catalyst, its metal active constituent major part is all to exist with oxide form, and reactive metal oxides on catalyst need to be converted into sulfide when actual use, therefore, catalyst needs before use through over cure or claims presulfurization.
Conventional catalyst vulcanization process adopts " in device " sulfuration or claims " original position " sulfuration, first the catalyst of oxidation state is packed in hydrogenation reactor, then in the process constantly heating up to passing into hydrogen in reactor and vulcanizing agent carries out presulfurization, this method is brought following problem: (1) will set up special presulfurization equipment on hydrogenation plant; (2) water that the vulcanizing agent adding in sulfidation and reaction generate and hydrogen sulfide very easily cause the corrosion of high-pressure reactor and relevant devices, cause device damage and potential safety hazard; (3) sulfidation is longer, incurs loss through delay on-stream time.(4) vulcanizing agent used is inflammable, poisonous, in sulfidation to environment; (5) in device, the cost of presulfurization is higher.
For this reason, there is pre-curing technology outside scene simple, efficient, pollution-free and that cost is low (or claiming " device is outer " presulfurization), being transferred to by the presulfurization of catalyst the catalyst carrying out on special vulcanization reaction device or make has been the catalyst of sulphided state, thereby catalyst is packed in hydrogenation reactor can be used, need not vulcanize, this technology has become the development trend of hydrogenation catalyst technology of preparing in recent years again.
At present, the hydrogenation catalyst of open report " device is outer " pre-curing technology mainly contains two kinds of technology paths:
(1) the first technology path is first vulcanizing agent to be adopted the method for distillation, melting or dipping to be incorporated in the space of hydrogenation catalyst of oxidation state, then under existing, inert gas makes catalyst member presulfurization through hyperthermic treatment, finally catalyst is packed in hydrogenation reactor, in temperature-rise period, under the existence at hydrogen, complete the presulfurization of catalyst going into operation;
(2) the second technology path is in special prevulcanisation-devices, completes the presulfurization of catalyst under the existence of hydrogen and hydrogen sulfide or labile organic sulfurizing agent, then makes non-hypergolic presulfurization type catalyst through oxygen-containing gas Passivation Treatment.
CN85107953 discloses a kind of method of processing hydrogenation catalyst, wherein mainly comprise first with petroleum solvent dissolve and the elementary sulfur of dilution, multiple organic polysulfide at 50～150 ℃ of impregnation process hydrogenation catalysts, then in the atmosphere of no hydrogen, at lower than 275 ℃, process, reactive metal oxides is vulcanized, finally under the existence of hydrogen, at the temperature higher than 275 ℃, activate.CN91101805.7 discloses a kind of method in hole of sulphur being mixed to hydrocarbon processing catalysts, and its feature is: first adopt solvent dilution vulcanizing agent process catalyst, then steam exist under, vulcanizing treatment at the temperature higher than 250 ℃.The organosulfur compound that vulcanizing agent used easily decomposites hydrogen sulfide by elementary sulfur with under hydrogen exists forms, and solvent used is the solvent naphtha that contains olefine fraction or vegetable oil.US 6,365,542 discloses a kind of hydrogenating catalyst method of sulfuration outward, is characterized in first processing catalyst with the oil containing elementary sulfur, alkene at 100～120 ℃, then process inert gas treatment at the temperature of 100～300 ℃.US 6,417,134 disclose a kind of outer method for pre-sulphuration of device of hydrotreating catalyst, be characterized in first with the elementary sulfur of solvent dilution, organic sulfur compound, organic polysulfide, containing the oil of alkene, containing component impregnation process catalyst at the temperature of 300 ℃ of ethylene linkage, then at the temperature of 250～600 ℃, use hydrogen treat, finally use oxygen-containing gas passivation.Said method is all that ready-made oxidized catalyst is carried out to presulfurization processing, has the following disadvantages like this in preparation process: the oxide M oO of activity of hydrocatalyst metal M o, W, Co, Ni
3, WO
3, there is strong interaction in CoO, NiO and carrier surface, causes active metal component sulfuration difficulty and not exclusively, the hydrogenation activity of catalyst is reduced, and can cause serious environmental pollution in sulfidation.
CN200410039449.5 discloses a kind of preparation method of sulfide type catalyst, it is that mode by incipient impregnation is by the molybdenum dithiophosphate of solubility (tungsten) hydrochlorate and Co(Ni) atom substep or a step load on the carrier of catalyst, and in inert gas through heat treated, have the sulfide type catalyst of metal sulfide thereby make load.Because Thiomolybdate and thiqtung state etc. are water insoluble, obtain solution need to add organic solvent, and complicated process of preparation is unsuitable for large-scale industrial production.In addition, the method, in high-temperature process, due to the volatilization of organic solvent, has been strengthened the interaction of hydrogenation component and carrier, has affected the sulfuration of catalyst, and sulphidity is relatively low, and catalyst performance declines.
The impact of the reactivity worth of sintering temperature on sulfur-bearing precursor hydrocracking catalyst has been studied in " petroleum refining and chemical industry " (2011,42 (6): 50-56).Mode by kneading loads on ammonium thiomolybdate and nickel nitrate on the carrier of catalyst, and in inert gas through heat treated, obtain the sulfide type catalyst of sulfur-bearing metal sulfide.The method technique is simple, and state of cure (vulcanization) is high, makes the sulfurized hydrogenation catalyst making have higher activity and selectivity, but the catalyst metals dispersing uniformity of preparing due to kneading method is poor, and using rate of metal is low, has affected activity and the product property of catalyst.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art part, the invention provides the preparation method of the sulfurized hydrogenation processing catalyst that a kind of metal is uniformly dispersed, state of cure (vulcanization) is high, activity is high and product is of fine quality.
The preparation method of sulfurized hydrogenation catalyst of the present invention, comprising:
(l) preparation ammonium molybdate and/or ammonium tungstate salting liquid a, formulating vulcanization ammonium salt solution b, preparation nickel salt and/or cobalt salt slurries c;
(2) needed carrier powder is added water making beating, obtains slurries d;
(3) solution a, solution b and solution c are passed into slurries d, hierarchy of control temperature is at 50 ~ 80 ℃, and the time of passing into is 0.5 ~ 2.0 hour;
(4) material of step (3) gained filtered, wash, under the protection of inert gas, be dried, obtain catalyst intermediate;
(5) catalyst intermediate is added to adhesive kneading, through extruded moulding, dry under the protection of inert gas, roasting, makes sulfurized hydrogenation and processes catalyst.
In step (1), in ammonium molybdate and/or ammonium tungstate solution, every 100 ml contain 5 ~ 30gMo and/or W, are preferably 5 ~ 20gMo and/or W.The concentration of ammonium sulfide solution is 5wt% ~ 30wt%, is preferably 10wt% ~ 15wt%.In nickel salt and/or cobalt salt slurries, every 100ml contains 5 ~ 20gNi and/or Co, is preferably 5 ~ 15gNi and/or Co.Described nickel salt and/or cobalt salt are selected from one or more in nitrate, carbonate, subcarbonate, acetate, chloride.
In step (2), the volume ratio of carrier powder and water is 1:5 ~ 1:30, is preferably 1:10 ~ 1:20.
Described carrier is generally refractory inorganic oxides, as one or more in aluminium oxide, silica, zirconia, titanium oxide, magnesia etc.Described carrier powder is hydroxide and/or the oxide powder that can generate carrier component.The active metal component of hydrotreating catalyst of the present invention is W and/or Mo and Ni and/or Co, can contain auxiliary agent simultaneously.The selection of catalyst carrier for hydrgenating, active metal component and auxiliary agent and consumption can specifically be determined according to the needs of application according to this area general knowledge.
The ratio of controlling Mo and/or the molal quantity of W and the molal quantity of ammonium sulfide in step (3) is 1:10 ~ 1:2.
Hydrotreating catalyst of the present invention, take the weight of catalyst as benchmark, Mo and/or W be take the content of element as 10wt%～30wt%, and Co and/or Ni are take the content of element as 2wt%～10wt%.
In step (4), described inert gas is preferably nitrogen, and described drying condition is as follows: be dried 4 ~ 10 hours at 90 ~ 140 ℃.
In step (5), binding agent is generally the little porous aluminum oxide through peptization.Moulding can be determined according to the shape of final catalyst, as extrusion etc.Described drying condition is as follows: be dried 4 ~ 14 hours at 100 ~ 130 ℃, roasting condition was as follows: 450 ~ 600 ℃ of roastings 3 ~ 10 hours.
Sulfurized hydrogenation of the present invention is processed in the preparation method of catalyst, the imbibition ability of carrier powder is very strong, after making beating is processed, carrier powder is through fully water suction, be present in slurries d with graininess, as ammonium molybdate and/or ammonium tungstate solution a, when ammonium sulfide solution b and solution c pass into slurries d, ammonium molybdate or ammonium tungstate react the water-fast particle tiny and uniform Thiomolybdate or the thiqtung state that generate with ammonium sulfide, because carrier component powder does not substantially have capillary absorption ability after making beating, so Thiomolybdate and/or thiqtung state are deposited on the surface of carrier powder equably, in subsequent processes, be decomposed to form MoS tiny and lower valency that be evenly distributed at carrier surface
2and WS
2plates, form more corner angle, be conducive to molybdenum and/cobalt is adsorbed onto edges and corners, form active higher II type Ni(Co with Mo or W) Mo(W) the active phase of S, make the state of cure (vulcanization) of catalyst high, improved the utilization ratio of active metal, thereby improved the Hydrogenation of catalyst.And in the inventive method, the active metallic content of catalyst can be adjusted flexibly, avoid low the brought difficulty of Thiomolybdate and/or thiqtung state solubility.In addition, pore volume, aperture and the specific area impact of the inventive method on carrier component is less, and therefore, pore volume, the specific area of gained hydrotreating catalyst are larger.
Hydrotreating catalyst prepared by the inventive method, the Thiomolybdate and/or the thiqtung state decomposes that generate due to reaction are molybdenum sulfide and/or tungsten sulfide, nickel salt and/or cobalt salt are converted into the sulfide of nickel and/or cobalt after follow-up heat treated, therefore, the hydrotreating catalyst of gained itself is sulphided state, in use without vulcanizing again.Result of study proves, load have the catalyst of the lower valency sulfide of Mo, W, Co, Ni in room temperature and drier air, be safe, not self-heating with diergolic, therefore, according to the prepared catalyst of the method for this invention, as long as through inert gas treatment, and adopt the airtight and lucifuge of room temperature packing, can guarantee the security of catalyst stores, transportation and filling process.
The sulfurized hydrogenation processing catalyst of the inventive method gained is applicable to need the catalytic process of sulphided state hydrotreatment, is particularly useful in hydrocracking preprocessing process.
The specific embodiment
Below in conjunction with embodiment in detail technical characterstic of the present invention is described in detail.In the present invention, wt% is mass fraction, and v% is volume fraction.
Embodiment 1
Catalyst catA involved in the present invention.
Preparation Ammoniun Heptamolybdate Solution 250 ml(a), in solution, contain 10gMo/100ml, preparation 10wt% ammonium sulfide solution 100ml(b), prepare phosphorous nickel nitrate solution 40ml(c), in solution, containing 5g nickel/100ml, in solution, contain 0.5g phosphorus/100ml, take 150g aluminum oxide dry glue powder, join in 1500g water and be beaten into slurries (d), (a) and (b), (c) are slowly added in slurries (d), stir.65 ℃ of hierarchy of control temperature, react after 1 hour filter, washing, by gained material under the protection of inert gas 100 ℃ dry 6 hours dry, obtain catalyst intermediate.After catalyst intermediate is put into roller and evenly mixed, then the adhesive that adds 180g to be made up of nitric acid and SB aluminium oxide peptization, kneading, rolls, make can extrusion paste, extruded moulding.Under the protection of nitrogen, 120 ℃ dry 6 hours, 500 ℃ of roastings 4 hours, make catalyst catA.
Embodiment 2
Catalyst catB involved in the present invention.
Preparation ammonium tetramolybdate solution 600 ml(a), in solution, contain 5gMo/100ml, preparation 15wt% ammonium sulfide solution 200ml(b), prepare phosphorous nickel nitrate solution 40ml(c), in solution, containing 7g nickel/100ml, in solution, contain 0.4g phosphorus/100ml, take 160g aluminum oxide dry glue powder, join in 1500g water and be beaten into slurries (d), (a) and (b), (c) are slowly added in slurries (d), stir.Hierarchy of control temperature 70 C, react after 1 hour filter, washing, by gained material under the protection of inert gas 100 ℃ dry 6 hours dry, obtain catalyst intermediate.After catalyst intermediate is put into roller and evenly mixed, then the adhesive that adds 180g to be made up of nitric acid and SB aluminium oxide peptization, kneading, rolls, make can extrusion paste, extruded moulding.Under the protection of nitrogen, 120 ℃ dry 6 hours, 500 ℃ of roastings 4 hours, make catalyst catB.
Embodiment 3
Catalyst catC involved in the present invention
Preparation ammonium metatungstate solution 250 ml(a), in solution, contain 10g tungsten/100ml, preparation 10wt% ammonium sulfide solution 100ml(b), prepare phosphorous nickel nitrate solution 40ml(c), in solution, containing 5g nickel/100ml, in solution, contain 0.5g phosphorus/100ml, take 150g aluminum oxide dry glue powder, join in 1500g water and be beaten into slurries (d), (a) (b) He (c) slowly added in slurries (d), stir.75 ℃ of hierarchy of control temperature, react after 1 hour filter, washing, by gained material under the protection of inert gas 100 ℃ dry 6 hours dry, obtain catalyst intermediate.After catalyst intermediate is put into roller and evenly mixed, then the adhesive that adds 180g to be made up of nitric acid and SB aluminium oxide peptization, kneading, rolls, make can extrusion paste, extruded moulding.Under the protection of nitrogen, 120 ℃ dry 6 hours, 500 ℃ of roastings 4 hours, make catalyst catC
Comparative example 1
Reference catalyst D preparation.Take 150g aluminum oxide dry glue powder, put into after roller, then add 180g by nitric acid and SB aluminium oxide peptization and the adhesive of making, kneading, rolls, make can extrusion paste, extruded moulding.110 ℃ dry 6 hours, be then placed in Muffle furnace, be roasting 4 hours in the air of 500 ℃ in temperature, obtain reference agent carrier D.
Take four thio ammonium molybdate 56.9g, add 30ml monoethanolamine and 20ml distilled water, stir lower dissolving, obtain sanguine settled solution A.Take nickel oxide powder 6.5g, add 20ml monoethanolamine and 5.0g tartaric acid, add under thermal agitation and dissolve, obtain blue-green settled solution B.Solution A and solution B are mixed to get to solution C.With this solution impregnation 100g reference agent carrier D, at room temperature place and dry for 24 hours.Catalyst after drying is placed in to tube furnace, and at 350 ℃, logical nitrogen treatment 4 hours, obtains reference catalyst catD.
Comparative example 2
With 200ml Mo-Ni-P co-impregnated solution (MoO
3,niO and P
2o
5concentration be respectively 36g/100ml, 10g/100ml and 2g/100ml) excessive dipping 100g reference agent carrier D 2 hours, 100 ℃ dry 6 hours, 500 ℃ of roastings 4 hours, make reference catalyst catE.
It is sulfurized oil that reference catalyst catE sulfuration adopts containing the kerosene of carbon disulfide.Presulfurization condition is as follows: hydrogen dividing potential drop 14.7MPa, 370 ℃ of curing temperatures, vulcanizing agent content 2wt%, volume space velocity 1.0h
-1, hydrogen to oil volume ratio 1000.
Comparative example 3
In " petroleum refining and chemical industry " (2011,42 (6): 50-56), the preparation method of catalyst prepares reference catalyst F.Take 140g aluminium oxide, 55.0g ammonium thiomolybdate, 40g nickel nitrate, after putting into roller and evenly mixing, then the adhesive that adds 180g to be made up of nitric acid and SB aluminium oxide peptization, kneading, rolls, make can extrusion paste, extruded moulding.Under the protection of nitrogen, 110 ℃ dry 6 hours, be then placed in Muffle furnace roasting 4 hours at 500 ℃, make catalyst catF.
The physico-chemical property of table 1 embodiment and comparative example gained catalyst
| Catalyst numbering | catA | catB | catC | catD | catE | caF |
| Catalyst composition, in element, wt% | ? | ? | ? | ? | ? | ? |
| Mo | 14.9 | 17.2 | － | 16.2 | 16.3 | 16.0 |
| W | － | － | 15.3 | － | － | － |
| Ni | 4.2 | 5.1 | 3.8 | 4.3 | 4.7 | 4.1 |
| Catalyst property | ? | ? | ? | ? | ? | ? |
| Specific area, m 2/g | 234 | 230 | 228 | 176 | 181 | 194 |
| Pore volume, ml/g | 0.39 | 0.37 | 0.38 | 0.30 | 0.31 | 0.34 |
The invention described above catalyst catA, catB, catD and comparative example catalyst caD, catE, catF are carried out to active evaluation test.Test is carried out on 200ml small hydrogenation device, and raw materials used oil nature is in table 2.Operating condition is as follows: hydrogen dividing potential drop 14.7MPa, hydrogen to oil volume ratio 1500:1, volume space velocity 1.5h when liquid
-1.Catalyst activity result of the test is in table 3.
Table 2 evaluation is used feedstock oil character
| Feedstock oil | Iran VGO |
| Density (20 ℃)/gcm -3 | 0.9025 |
| Boiling range/℃ | ? |
| IBP/10%/50% | 308/369/430 |
| 90%/95%/EBP | 50/3526/560 |
| Carbon residue, wt% | 0.2 |
| S，wt% | 1.5 |
| N，wt% | 0.11 |
| BMCI value | 41.5 |
Table 3 catalyst activity evaluation result
| Catalyst numbering | catA | catB | catC | catD | catE | catF |
| Reaction temperature, ℃ | 363 | 362 | 364 | 377 | 376 | 370 |
| S，μg/g | <10 | <10 | <10 | <10 | <10 | <10 |
| N，μg/g | 5~8 | 5~8 | 5~8 | 5~8 | 5~8 | 5~8 |
Claims (11)
1. sulfurized hydrogenation is processed a preparation method for catalyst, comprising:
(l) preparation ammonium molybdate and/or ammonium tungstate salting liquid a, formulating vulcanization ammonium salt solution b, preparation nickel salt and/or cobalt salt slurries c;
(2) needed carrier powder is added water making beating, obtains slurries d;
(3) solution a, solution b and solution c are passed into slurries d, hierarchy of control temperature is at 50 ~ 80 ℃, and the time of passing into is 0.5 ~ 2.0 hour;
(4) material of step (3) gained filtered, wash, under the protection of inert gas, be dried, obtain catalyst intermediate;
(5) catalyst intermediate is added to adhesive kneading, through extruded moulding, dry under the protection of inert gas, roasting, makes sulfurized hydrogenation and processes catalyst.
2. in accordance with the method for claim 1, it is characterized in that in step (1), in ammonium molybdate and/or ammonium tungstate solution, every 100 ml contain 5 ~ 30gMo and/or W; The concentration of ammonium sulfide solution is 5wt% ~ 30wt%; In nickel salt and/or cobalt salt slurries, every 100 ml contain 5 ~ 20gNi and/or Co.
3. in accordance with the method for claim 1, it is characterized in that in step (1), in ammonium molybdate and/or ammonium tungstate solution, every 100 ml contain 5 ~ 20gMo and/or W; The concentration of ammonium sulfide solution is 10wt% ~ 15wt%; In nickel salt and/or cobalt salt slurries, every 100 ml contain 5 ~ 10gNi and/or Co.
4. in accordance with the method for claim 1, it is characterized in that, in step (2), the volume ratio of carrier powder and water is 1:5 ~ 1:30.
5. in accordance with the method for claim 1, it is characterized in that, in step (2), the volume ratio of carrier powder and water is 1:10 ~ 1:20.
6. in accordance with the method for claim 1, it is characterized in that described carrier is one or more in aluminium oxide, silica, zirconia, titanium oxide, magnesia.
7. the ratio that in accordance with the method for claim 1, it is characterized in that controlling in step (3) Mo and/or the molal quantity of W and the molal quantity of ammonium sulfide is 1:10 ~ 1:2.
8. in accordance with the method for claim 1, it is characterized in that described hydrotreating catalyst, take the weight of catalyst as benchmark, Mo and/or W be take the content of element as 10wt%～30wt%, and Co and/or Ni are take the content of element as 2wt%～10wt%.
9. in accordance with the method for claim 1, it is characterized in that described nickel salt and/or cobalt salt are selected from one or more in nitrate, carbonate, subcarbonate, acetate, chloride.
10. in accordance with the method for claim 1, it is characterized in that in step (4), described drying condition is as follows: be dried 4 ~ 10 hours at 90 ~ 140 ℃.
11. in accordance with the method for claim 1, it is characterized in that in step (5), described drying condition is as follows: be dried 4 ~ 14 hours at 100 ~ 130 ℃, roasting condition was as follows: 450 ~ 600 ℃ of roastings 3 ~ 10 hours.
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Cited By (3)
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| CN105521799A (en) * | 2014-09-29 | 2016-04-27 | 中国石油化工股份有限公司 | Vulcanized hydrogenation catalyst, and preparation method and application thereof |
| CN109012702A (en) * | 2018-08-31 | 2018-12-18 | 西安向阳航天材料股份有限公司 | A kind of preparation method of presulfurization Hydrobon catalyst |
| CN112941558A (en) * | 2020-12-30 | 2021-06-11 | 河南科技大学 | Preparation method of composite material catalytic electrode |
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Cited By (4)
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| CN105521799A (en) * | 2014-09-29 | 2016-04-27 | 中国石油化工股份有限公司 | Vulcanized hydrogenation catalyst, and preparation method and application thereof |
| CN109012702A (en) * | 2018-08-31 | 2018-12-18 | 西安向阳航天材料股份有限公司 | A kind of preparation method of presulfurization Hydrobon catalyst |
| CN112941558A (en) * | 2020-12-30 | 2021-06-11 | 河南科技大学 | Preparation method of composite material catalytic electrode |
| CN112941558B (en) * | 2020-12-30 | 2023-08-22 | 河南科技大学 | Preparation method of composite material catalytic electrode |
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