CN105363481A - Preparation method of ultra low aromatic hydrocarbon white oil hydrofining catalyst - Google Patents
Preparation method of ultra low aromatic hydrocarbon white oil hydrofining catalyst Download PDFInfo
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- CN105363481A CN105363481A CN201510807446.XA CN201510807446A CN105363481A CN 105363481 A CN105363481 A CN 105363481A CN 201510807446 A CN201510807446 A CN 201510807446A CN 105363481 A CN105363481 A CN 105363481A
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Abstract
The invention discloses a preparation method of an ultra low aromatic hydrocarbon white oil hydrofining catalyst. The method includes: subjecting pseudo-boehmite and assistants to mixing kneading and molding, and performing drying and roasting to obtain a solid catalyst carrier, preparing a non precious metal tungsten metal salt, a molybdenum metal salt and a nickel metal salt into an aqueous solution, loading W, Mo and Ni on the carrier by dipping, and carrying out drying and roasting to obtain the ultra low aromatic hydrocarbon white oil hydrofining catalyst. The catalyst has large pore volume and specific surface area, high metal dispersity, multiple edge activity center sites, good hydrodenitrification, aromatic hydrocarbon saturation activity and ultra deep hydrodesulfurization activity, high mechanical strength, good hydrodesulfurization, denitrification and aromatic hydrocarbon saturation properties, and good low-temperature activity, stability and regeneration performance, and is suitable for hydrodearomatization and desulfurization reaction of light diesel oil containing heavy aromatic hydrocarbon.
Description
Technical field
The invention belongs to method for preparing catalyst technical field, especially a kind of preparation method of ultralow aromatic hydrocarbons white oil Hydrobon catalyst is related to, this catalyst is suitable for the hydrogenation process of light diesel, is specially adapted to the process of producing ultralow aromatic hydrocarbons white oil containing the light diesel of heavy aromatics.
Background technology
The white oil impurity such as aromatic hydrocarbons and sulfide that is lube cut in deep refining removing lube cut and the class oil product that obtains.It is colourless, tasteless, odorless, has chemical inertness and excellent light, heat endurance, is widely used in the fields such as chemical industry, commodity, food, medicine, weaving and agricultural.Different with refining depth by purposes, white oil can be divided into the classifications such as technical grade, cosmetic level, food-grade and pharmaceutical grade.
Producing white oil by hydrogenation technique have pollution-free, yield is high, raw material sources are extensive, product category is many, viscosity advantages of higher, has now been developed rapidly and extensive use.White oil product is very strict to the requirement of arene content.Along with white oil product quality requires more and more higher, require that product has good light and heat stability.Solution is that deep hydrogenation post-refining carries out aromatic saturation, obtains the white oil product of low arene content.
What CN1769379A, CN1140748A, CN1070215A related to is all conventional metallic catalyst, and activity is lower, effectively can not solve the deeply de-aromatizing problem of lubricating oil; CN1245204A, CN90100187.2 all relate to platiniferous and the bimetallic noble metal hydrogenation catalyst of palladium, but due to A1 in these two kinds of catalyst carriers
2o
3content is lower, is all no more than 30wt%, and therefore the acidity of this catalyst is more weak, is only suitable for the hydrogenation process of light-end products, distillate, and is not suitable for the deeply hydrodearomatized process of heavy grease.
US5393408 relates to two kinds of catalyst of a kind of macropore amorphous aluminum silicide and a kind of mesoporous amorphous silica-alumina supports carried noble metal, need adopt two-stage hydrogenation, just can reach the object of Arene removal to hydro-treated lubricating base oil.Describe in US5308814 a kind of be applicable to boiling range scope 66 ~ 371 DEG C hydro carbons Porous deproteinized bone, desulfurization, denitrogenation noble metal catalyst, in catalyst, carrier is made up of y-type zeolite and aluminium oxide, content 50 ~ the 80wt% of y-type zeolite, hydrogenation metal is Pt and Pd, content is 0.1 ~ 2.0wt%, the arene content of outlet oil is 9.9v%, and aromatics conversion rate is 84%, and sulfur content is 17 μ gg
-1.US5391291 describes a kind of boiling range scope that is applicable at the raw material aromatic hydrogenation of 125 ~ 625 DEG C, this catalyst carrier adopts a kind of y-type zeolite, the aqueous solution of y-type zeolite and one or more alkaline including earth metal ions is carried out ion-exchange by the preparation method of carrier, make the alkaline earth metal content on it be 1.5 times of alkaline earth metal content on original y-type zeolite or more, then mix with aluminium oxide.On carrier, Pt, Pd content is 0.03% ~ 3.0%.Below 20wt% can be down to the distillate arene content after this catalyst treatment.
US4263127, US4325804 disclose the method for a kind of Hydrogenation for ultralow aromatic hydrocarbons white oil, and its catalyst related to is noble metal catalyst, and the carrier of this catalyst is aluminium oxide, and aided metal is silicon, zinc or magnesium.CN101745383A discloses a kind of preparation method of deeply hydrodearomatized catalyst, and main active component is Pt, and auxiliary agent is Pd, and carrier is amorphous silicon alumina supporter, SiO
2content is 40% ~ 60% of vehicle weight.The support acidity of catalyst prepared by above method is low, and metal dispersion is poor, and catalyst activity is lower, Porous deproteinized bone weak effect.
CN20140045471 discloses a kind of preparation method of catalytic hydro-dearomatization catalyst.The method adopts silica alumina ratio higher, degree of crystallinity is high, the NaY type Molecular sieve raw material of good stability, successively through ammonium exchange, first time hydrothermal treatment consists, containing alkaline solution treatment, second time hydrothermal treatment consists and with acid and ammonium salt mixed solution process after, obtain small crystal grain Y-shaped molecular sieve.Using this small crystal grain Y-shaped molecular sieve as acidic components, match with amorphous aluminum silicide and active component and adjuvant component, there is higher hydrogenation aromatics-removing active.Catalyst activity prepared by above method is high, but its catalyst is noble metal catalyst, and production cost is high, and complex manufacturing.
Therefore, the white oil catalyst of current domestic use mostly is noble metal catalyst, and its hydrogenation reaction characteristic is good, but cost is high, and with the generation of cracking reaction in unifining process, generates small molecule hydrocarbon compounds.
Summary of the invention
For solving the problem, the object of this invention is to provide a kind of preparation method of ultralow aromatic hydrocarbons white oil Hydrobon catalyst, the catalyst that the method is prepared has the advantages that specific area is large, pore volume large, acid centre distribution is reasonable, cost is low, hydrogenation activity is high, is particularly suitable for the light diesel hydrogenation reaction containing heavy aromatics.
For achieving the above object, the present invention adopts following technical scheme:
A preparation method for ultralow aromatic hydrocarbons white oil Hydrobon catalyst, it comprises the following steps:
Prepared by step a, carrier:
By boehmite and auxiliary agent according to (80wt% ~ 95wt%): the proportioning of (5wt% ~ 20wt%) is through kneading, shaping, and dry and roasting, obtains white strip or cellular solids catalyst carrier;
Step b, base metal tungsten slaine, molybdenum salt, nickel slaine are configured to the aqueous solution;
Step c, employing infusion process are in supported on carriers W, Mo and Ni of step a, and drying and roasting, obtain ultralow aromatic hydrocarbons white oil Hydrobon catalyst.
In the preparation method of above-mentioned ultralow aromatic hydrocarbons white oil Hydrobon catalyst, in its step a, carrier preparation process is:
Step a1, be the pseudo-thin diasphore with great pore volume of 0.6 ~ 1.3ml/g and pore volume by pore volume be that 0.1 ~ 0.5ml/g holds aperture boehmite by 5wt% ~ 40wt% and 60wt% ~ 95wt% proportioning, mix with the auxiliary agent of 5wt% ~ 20wt% again, the material prepared is dropped into batch mixer, be dry mixed 10 ~ 60 minutes, take out powder by 20 ~ 120 object screen clothes, to remove coarse granule;
Step a2, drop in kneader by powder, add the water of powder weight 0.4 ~ 1.5 times, sealing kneading 20 ~ 90 minutes, makes powder become pug;
Step a3, pug is sent into pug mill practice into closely knit mud section;
Step a4, mud section is molded into the moulded pottery not yet put in a kiln to bake with contour structures by extruder and mould;
Step a5, moulded pottery not yet put in a kiln to bake under room temperature to 130 DEG C temperature conditions dry 0.5 ~ 24 hour, until base substrate moisture content is below 10%;
Step a6, dried moulded pottery not yet put in a kiln to bake is broken into the semi-finished product base substrate of 1 ~ 30mm length by disconnected bar machine;
Step a7, by kiln by base substrate under 350 ~ 650 DEG C of temperature conditions, oxidizing atmosphere roasting 5 ~ 15 hours;
Step a8, by 10 ~ 40 eye mesh screens remove impurity.
Further, in the preparation method of above-mentioned ultralow aromatic hydrocarbons white oil Hydrobon catalyst, auxiliary agent in its step a comprises adhesive, forming agent and phosphoric acid, adhesive is one or more mixing in methylcellulose, carboxymethyl cellulose, hydroxypropyl methylcellulose, polyethylene glycol oxide, and forming agent is one or more mixing in nitric acid, acetic acid, citric acid, lactic acid, glycerine, stearic acid, oleic acid.
Further, in above-mentioned step a2, in kneader, also can add the colloidal sol acid of powder weight 0.5 ~ 20%.
Further, in the preparation method of above-mentioned ultralow aromatic hydrocarbons white oil Hydrobon catalyst, its tungsten slaine is ammonium metatungstate, ammonium tungstate or sodium tungstate, and molybdenum salt is Nickelous nitrate hexahydrate or nickelous carbonate, and nickel slaine is ammonium tetramolybdate, ammonium heptamolybdate or nitric acid molybdenum.
Further, in the preparation method of above-mentioned ultralow aromatic hydrocarbons white oil Hydrobon catalyst, it is with the weight of catalyst for benchmark, and the content of the content of W to be the content of 10wt% ~ 50wt%, Mo be 5wt% ~ 30wt%, Ni is 0.5wt% ~ 20wt%.
Metal involved in the present invention is tungsten, molybdenum, nickel, nonmetal is phosphorus, its predecessor is respectively tungsten slaine, molybdenum salt, nickel slaine, phosphoric acid, predecessor is 10wt% ~ 50wt% by the content of W in catalyst, the content of Ni is 0.5wt% ~ 20wt%, the content of Mo is 2wt% ~ 30wt%, the content of P is 0.1 ~ 15%, calculate predecessor proportioning solution, adopt the method for saturated dipping or excessive dipping by solution loadings on carrier, after dipping solution, dry under room temperature to 130 DEG C temperature conditions to its moisture content lower than 10%, finally the carrier of supported compound is sent into kiln and carry out peroxide roasting 5 ~ 15 hours until above-mentioned slaine becomes oxidation state species.
The ultralow aromatic hydrocarbons white oil Hydrobon catalyst character of gained of the present invention is as follows: specific area is 100 ~ 400m
2/ g, is preferably 150 ~ 350m
2/ g, pore volume is 0.3 ~ 1.2ml/g, is preferably 0.4 ~ 0.9ml/g, bulk density: 0.35 ~ 0.9g/ml, preferably 0.45 ~ 0.7g/ml, meleic acid amount is 0.3 ~ 1.0mmol/g, the ratio being preferably 0.4 ~ 0.8mmol/g, B acid/L acid is 1.5 ~ 2.0, is preferably 1.6 ~ 1.9.
Owing to adopting technical scheme as above, the present invention has following superiority:
The preparation method of the present invention's ultralow aromatic hydrocarbons white oil Hydrobon catalyst, its preparation process is simple, convenient, is easy to operation, is applicable to industrial production.Catalyst of the present invention is suitable for the hydrogenation process of light diesel, is particularly suitable for the hydrogenation aromatics-removing containing the light diesel of heavy aromatics and desulphurization reaction.
Catalyst of the present invention is to contain the modified aluminas of acidic components for carrier, adopt complexing technology load W-Mo-Ni active component, pore volume and specific area large, metal dispersity is high, position, activated centre, edge is many, hydrodenitrogeneration, arene saturating activity and ultra-deep hydrodesulfuration activity are good, mechanical strength is high, tenor is at about 15 ~ 30wt%, there is good hydrodesulfurization, denitrogenation and aromatic saturation performance, low temperature active, stability and regenerability are good, can meet the requirement of long-term operation.
Catalyst of the present invention is adding man-hour to light diesel, reaction condition generally under hydrogen existence condition, the best 10 ~ 20MPa of reaction pressure, hydrogen to oil volume ratio 500 ~ 2000, volume space velocity 0.5 ~ 3.0h during liquid
- 1, reaction temperature 280 ~ 380 DEG C.
Detailed description of the invention
Can be described in further detail the present invention with reference to following examples; But following examples are only illustrations, and the present invention is not limited to these embodiments.
The specific area of catalyst of the present invention and pore volume adopt low temperature liquid nitrogen determination of adsorption method, and acid amount and Acidity employing infrared spectrometer record, use adsorbent for pyridine.Wt% is mass fraction.
Embodiment 1
45g pore volume is the pseudo-thin diasphore with great pore volume of 1.1ml/g and 105g pore volume is after the little pore volume boehmite of 0.2ml/g mixes with 10g methylcellulose, be dry mixed 30 minutes, take out powder by 80 object screen filtrations, powder is dropped in kneader, add 90g water, sealing kneading 20 minutes, powder is made to become pug, pug is sent into pug mill and practice into closely knit mud section, by extruder and mould, mud section is squeezed into the trifolium-shaped moulded pottery not yet put in a kiln to bake that external diameter is 1.5 ~ 2.1mm, moulded pottery not yet put in a kiln to bake at 70 DEG C dry 13 hours, dried moulded pottery not yet put in a kiln to bake is broken into the semi-finished product base substrate of 10mm length by disconnected bar machine, base substrate roasting 7 hours under temperature is 589 DEG C of oxidizing atmosphere environment, filtered by 30 eye mesh screens again and remove impurity, obtain white solid catalyst carrier, ammonium heptamolybdate, ammonium metatungstate, nickel nitrate and phosphoric acid are total to 75g to be dissolved in 105g water, above-mentioned slaine fully dissolves, do not have precipitation and after there is the stability of long period, drying and roasting is carried out after fully being flooded in metallic solution by carrier, obtain ultralow aromatic hydrocarbons white oil Hydrobon catalyst, condition that is dry and roasting is as follows: drying 13 hours under the baking oven environment of 55 DEG C, roasting 7 hours at 470 DEG C.
Obtained catalyst property is as follows:
Specific area: 130m
2/ g, pore volume: 0.41ml/g, radial crushing strength 21N/mm, bulk density: 0.68g/ml.
Catalyst chemical forms: Al
2o
346.6%, NiO8.1%, MoO
312%, WO
330%, P
2o
52%, all the other total impurities are 1.3%.
Embodiment 2
Be pseudo-thin diasphore with great pore volume and the 135g pore volume of 1.0ml/g by 15g pore volume be after the little pore volume boehmite of 0.3ml/g mixes with carboxymethyl cellulose and nitric acid 8g, be dry mixed 50 minutes, take out powder by 100 object screen filtrations, powder is dropped in kneader, add 130g water, sealing kneading 50 minutes, powder is made to become pug, pug is sent into pug mill and practice into closely knit mud section, by extruder and mould, mud section is squeezed into column type moulded pottery not yet put in a kiln to bake, moulded pottery not yet put in a kiln to bake at 100 DEG C dry 10 hours, dried moulded pottery not yet put in a kiln to bake is broken into the semi-finished product base substrate of 20mm length by disconnected bar machine, base substrate roasting 7 hours under temperature is 600 DEG C of oxidizing atmosphere environment, filtered by 30 eye mesh screens again and remove impurity, obtain white solid catalyst carrier, ammonium heptamolybdate, ammonium tungstate, nickel nitrate and phosphoric acid are total to 40g to be dissolved in 105g water, above-mentioned slaine fully dissolves, do not have precipitation and after there is the stability of long period, drying and roasting is carried out after fully being flooded in metallic solution by carrier, obtain ultralow aromatic hydrocarbons white oil Hydrobon catalyst, condition that is dry and roasting is as follows: at the baking oven inner drying 13 hours of 55 DEG C, at 470 DEG C of temperature, roasting 7 hours under oxidizing atmosphere environment.
Catalyst sample specific area: 220m
2/ g, pore volume: 0.51ml/g, radial crushing strength: 16N/mm, bulk density: 0.56g/ml.
Catalyst chemical forms: Al
2o
372.7%, NiO3%, MoO
34.1%, WO
317.6%, P
2o
51.5%, all the other total impurities are 1.1%.
Embodiment 3
Be pseudo-thin diasphore with great pore volume and the 123g pore volume of 1.2ml/g by 27g pore volume be the little pore volume boehmite of 0.5ml/g and methylcellulose, hydroxypropyl methylcellulose, after acetic acid and citric acid are total to 15g mixing, be dry mixed 60 minutes, take out powder by 120 object screen filtrations, powder is dropped in kneader, add 100g water, sealing kneading 80 minutes, powder is made to become pug, pug is sent into pug mill and practice into closely knit mud section, by extruder and mould, mud section is squeezed into honeycomb type moulded pottery not yet put in a kiln to bake, moulded pottery not yet put in a kiln to bake at 120 DEG C dry 8 hours, dried moulded pottery not yet put in a kiln to bake is broken into the semi-finished product base substrate of 30mm length by disconnected bar machine, base substrate roasting 5 hours under temperature is 650 DEG C of oxidizing atmosphere environment, filtered by 40 eye mesh screens again and remove impurity, obtain white solid catalyst carrier, ammonium tetramolybdate, ammonium metatungstate, nickel nitrate and phosphoric acid are total to 60g to be dissolved in 105g water, above-mentioned slaine fully dissolves, do not have precipitation and after there is the stability of long period (not precipitating in 2 hours), drying and roasting is carried out after fully being flooded in metallic solution by carrier, obtain ultralow aromatic hydrocarbons white oil Hydrobon catalyst, condition that is dry and roasting is as follows: at the baking oven inner drying 13 hours of 85 DEG C, at 460 DEG C of temperature, roasting 9 hours under oxidizing atmosphere environment.
Catalyst sample specific area: 180m
2/ g, pore volume: 0.53ml/g, radial crushing strength: 19N/mm, bulk density: 0.62g/ml.
Catalyst chemical forms: Al
2o
370.5%, NiO2%, MoO
34%, WO
317.6%, P
2o
55%, all the other total impurities are 0.9%.
Embodiment 4
Little pore volume boehmite and the methylcellulose of to be the pseudo-thin diasphore with great pore volume of 1.0ml/g and 105g pore volume by 45g pore volume be 0.3ml/g, hydroxypropyl methylcellulose, after acetic acid and citric acid are total to 10g mixing, be dry mixed 60 minutes, take out powder by 120 object screen filtrations, powder is dropped in kneader, add water 128g, sealing kneading 15 minutes, powder is made to become pug, pug is sent into pug mill and practice into closely knit mud section, by extruder and mould, mud section is squeezed into honeycomb type moulded pottery not yet put in a kiln to bake, moulded pottery not yet put in a kiln to bake at 70 DEG C dry 8 hours, dried moulded pottery not yet put in a kiln to bake is broken into the semi-finished product base substrate of 30mm length by disconnected bar machine, base substrate roasting 5 hours under temperature is 620 DEG C of oxidizing atmosphere environment, filtered by 40 eye mesh screens again and remove impurity, obtain white solid catalyst carrier, ammonium heptamolybdate, ammonium metatungstate, nickel nitrate and phosphoric acid are total to 40g to be dissolved in 105g water, above-mentioned slaine fully dissolves, do not have precipitation and after there is the stability of long period (not precipitating in 2 hours), drying and roasting is carried out after fully being flooded in metallic solution by carrier, obtain ultralow aromatic hydrocarbons white oil Hydrobon catalyst, condition that is dry and roasting is as follows: at the baking oven inner drying 13 hours of 80 DEG C, at 460 DEG C of temperature, roasting 9 hours under oxidizing atmosphere environment.
Catalyst sample specific area: 105m
2/ g, pore volume: 0.31ml/g, radial crushing strength: 28N/mm, bulk density: 0.71g/ml.
Catalyst chemical forms: Al
2o
367.5%, NiO2.2%, MoO
34.5%, WO
318.7%, P
2o
56.1%, all the other total impurities are 1.0%.
Embodiment 5
Little pore volume boehmite and the methylcellulose of to be the pseudo-thin diasphore with great pore volume of 1.0ml/g and 90g pore volume by 60g pore volume be 0.3ml/g, hydroxypropyl methylcellulose, after acetic acid and citric acid are total to 10g mixing, be dry mixed 60 minutes, take out powder by 120 object screen filtrations, powder is dropped in kneader, add water 155g, sealing kneading 15 minutes, powder is made to become pug, pug is sent into pug mill and practice into closely knit mud section, by extruder and mould, mud section is squeezed into honeycomb type moulded pottery not yet put in a kiln to bake, moulded pottery not yet put in a kiln to bake at 85 DEG C dry 7 hours, dried moulded pottery not yet put in a kiln to bake is broken into the semi-finished product base substrate of 20mm length by disconnected bar machine, base substrate roasting 5 hours under temperature is 600 DEG C of oxidizing atmosphere environment, filtered by 40 eye mesh screens again and remove impurity, obtain white solid catalyst carrier, ammonium heptamolybdate, ammonium metatungstate, nickel nitrate and phosphoric acid are total to 40g to be dissolved in 105g water, above-mentioned slaine fully dissolves, do not have precipitation and after there is the stability of long period (not precipitating in 2 hours), drying and roasting is carried out after fully being flooded in metallic solution by carrier, obtain ultralow aromatic hydrocarbons white oil Hydrobon catalyst, condition that is dry and roasting is as follows: at the baking oven inner drying 13 hours of 85 DEG C, at 460 DEG C of temperature, roasting 9 hours under oxidizing atmosphere environment.
Catalyst sample specific area: 110m
2/ g, pore volume: 0.34ml/g, radial crushing strength: 20N/mm, bulk density: 0.61g/ml.
Catalyst chemical forms: Al
2o
369.5%, NiO2.3%, MoO
34.3%, WO
317.8%, P
2o
55.3%, all the other total impurities are 0.8%.
The ultralow aromatic hydrocarbons white oil Hydrobon catalyst that the present invention obtains is when carrying out hydrofining reaction to light diesel, and can obtain ultralow aromatic hydrocarbons white oil product, its raw material, reaction condition and product property are as follows:
Table 1 feedstock property
Table 2 product property
Claims (9)
1. a preparation method for ultralow aromatic hydrocarbons white oil Hydrobon catalyst, is characterized in that: it comprises the following steps:
Prepared by step a, carrier:
By boehmite and auxiliary agent according to (80wt% ~ 95wt%): the proportioning of (5wt% ~ 20wt%) is through kneading, shaping, and dry and roasting, obtains white strip or cellular solids catalyst carrier;
Step b, base metal tungsten slaine, molybdenum salt, nickel slaine are configured to the aqueous solution;
Step c, employing infusion process are in supported on carriers W, Mo and Ni of step a, and drying and roasting, obtain ultralow aromatic hydrocarbons white oil Hydrobon catalyst.
2. the preparation method of ultralow aromatic hydrocarbons white oil Hydrobon catalyst according to claim 1, it is characterized in that: the auxiliary agent in its step a comprises adhesive, forming agent and phosphoric acid, adhesive is one or more mixing in methylcellulose, carboxymethyl cellulose, hydroxypropyl methylcellulose, polyethylene glycol oxide, and forming agent is one or more mixing in nitric acid, acetic acid, citric acid, lactic acid, glycerine, stearic acid, oleic acid.
3. the preparation method of ultralow aromatic hydrocarbons white oil Hydrobon catalyst according to claim 1, is characterized in that: in its step a, carrier preparation process is:
Step a1, be the pseudo-thin diasphore with great pore volume of 0.6 ~ 1.3ml/g and pore volume by pore volume be that 0.1 ~ 0.5ml/g holds aperture boehmite by 5wt% ~ 40wt% and 60wt% ~ 95wt% proportioning, mix with the auxiliary agent of 5wt% ~ 20wt% again, the material prepared is dropped into batch mixer, be dry mixed 10 ~ 60 minutes, take out powder by 20 ~ 120 object screen clothes, to remove coarse granule;
Step a2, drop in kneader by powder, add the water of powder weight 0.4 ~ 1.5 times, sealing kneading 20 ~ 90 minutes, makes powder become pug;
Step a3, pug is sent into pug mill practice into closely knit mud section;
Step a4, mud section is molded into the moulded pottery not yet put in a kiln to bake with contour structures by extruder and mould;
Step a5, moulded pottery not yet put in a kiln to bake under room temperature to 130 DEG C temperature conditions dry 0.5 ~ 24 hour, until base substrate moisture content is below 10%;
Step a6, dried moulded pottery not yet put in a kiln to bake is broken into the semi-finished product base substrate of 1 ~ 30mm length by disconnected bar machine;
Step a7, by kiln by base substrate under 350 ~ 650 DEG C of temperature conditions, oxidizing atmosphere roasting 5 ~ 15 hours;
Step a8, by 10 ~ 40 eye mesh screens remove impurity.
4. the preparation method of ultralow aromatic hydrocarbons white oil Hydrobon catalyst according to claim 3, is characterized in that: in step a2, also can add the colloidal sol acid of powder weight 0.5 ~ 20% in kneader.
5. the preparation method of ultralow aromatic hydrocarbons white oil Hydrobon catalyst according to claim 1, it is characterized in that: its tungsten slaine is ammonium metatungstate, ammonium tungstate or sodium tungstate, molybdenum salt is Nickelous nitrate hexahydrate or nickelous carbonate, and nickel slaine is ammonium tetramolybdate, ammonium heptamolybdate or nitric acid molybdenum.
6. the preparation method of ultralow aromatic hydrocarbons white oil Hydrobon catalyst according to claim 1, it is characterized in that: its with the weight of catalyst for benchmark, the content of the content of W to be the content of 10wt% ~ 50wt%, Mo be 5wt% ~ 30wt%, Ni is 0.5wt% ~ 20wt%.
7. a ultralow aromatic hydrocarbons white oil Hydrobon catalyst, is characterized in that: adopt claim 1 ~ 6 either method to prepare.
8. ultralow aromatic hydrocarbons white oil Hydrobon catalyst according to claim 7, is characterized in that: ultralow aromatic hydrocarbons white oil Hydrobon catalyst character is as follows: specific area is 100 ~ 400m
2/ g, pore volume is 0.3 ~ 1.2ml/g, and bulk density is 0.35 ~ 0.9g/ml, and meleic acid amount is the ratio of 0.3 ~ 1.0mmol/g, B acid/L acid is 1.5 ~ 2.0.
9. ultralow aromatic hydrocarbons white oil Hydrobon catalyst according to claim 7, is characterized in that: ultralow aromatic hydrocarbons white oil Hydrobon catalyst character is as follows: specific area is 150 ~ 350m
2/ g, pore volume is 0.4 ~ 0.9ml/g, and bulk density is 0.45 ~ 0.7g/ml, and meleic acid amount is the ratio of 0.4 ~ 0.8mmol/g, B acid/L acid is 1.6 ~ 1.9.
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