CN1162517C - Catalyst for producing diesel oil from Fischer-Tropsch synthetic wax and its prepn and use - Google Patents

Catalyst for producing diesel oil from Fischer-Tropsch synthetic wax and its prepn and use Download PDF

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CN1162517C
CN1162517C CNB011114398A CN01111439A CN1162517C CN 1162517 C CN1162517 C CN 1162517C CN B011114398 A CNB011114398 A CN B011114398A CN 01111439 A CN01111439 A CN 01111439A CN 1162517 C CN1162517 C CN 1162517C
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zeolite
oxide
diesel oil
catalyzer
fischer
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CN1374373A (en
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孙予罕
任杰
李到
李永红
李芳�
姜建卫
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Zhongke Synthetic Oil Technology Co Ltd
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Shanxi Institute of Coal Chemistry of CAS
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Abstract

The present invention relates to a catalyst for producing diesel oil by using fischer-tropsch synthetic wax, which comprises (by weight percentage): 30 to 50w% of Y zeolite, 5 to 20% of tungsten oxide or molybdenum oxide, 1 to 10% of oxide and 30 to 60% of the mixture of aluminum oxide or silicon and aluminium. The specific surface area of the hydrocracking catalyst of the present invention is from 250 to 400m<2>/g, the pore volume is from 0.30 to 0.70 ml/g, and the TPD acidity is from 0.75 to 1.5 mmol/g. The present invention can carry out selectivity chain breaking operation for straight chain saturated hydrocarbons, and thereby, the yield of the cut fraction of diesel oil is improved; products are isomerized, cut fractions of the diesel oil in the products have a lower solidifying point, better combustion performance, good catalyst activity and high diesel oil selectivity.

Description

A kind of Catalysts and its preparation method and purposes of producing diesel oil by Fischer-Tropsch synthetic wax
The invention belongs to a kind of catalyzer of producing diesel oil, relate in particular to a kind of Catalysts and its preparation method and purposes of producing diesel oil by Fischer-Tropsch synthetic wax.
In recent years, along with the atrophy of world's crude resources and raising up of crude oil price, energy consumption structure changes to oil, coal and Sweet natural gas alliance type gradually from oil dependent form, particularly SMDS (the Shell Middle Distillate Synthesis) technology of Shell company exploitation realizes industrial-scale production, makes coal/Sweet natural gas indirect liquefaction technology become one of the most attractive approach of back petroleum industry epoch liquid fuel.Also there is the research as the CO hydrogenation catalyst of a large amount of reports, particularly cobalt series catalyst domestic at present Fischer-Tropsch being synthesized.But the research to the deep processing of its product wax is still blank.
Fischer-Tropsch is synthetic can produce heavy hydrocarbon to greatest extent, its solid product---wax, and based on straight chain saturation alkane, impurity such as sulfur-bearing, nitrogen not, therefore aromatic free need not to carry out pre-treatment before further transforming, simplified technical process greatly.But the C-C key bond energy of straight chain saturation alkane makes comparatively difficulty of its selectivity scission of link than equalization, therefore, Preparation of catalysts is had higher requirement.
Hydrocracking technology is a kind of important refining of petroleum means, and it has good cracking selectivity, and can adapt to the variation of raw material and product demand neatly, therefore is Fischer-Tropsch synthetic wax is carried out the most effectively means of deep processing.With the amorphous silicon aluminium is the hydrocracking catalyst of cracking activity component, in cracking process to wax, show intermediate oil selectivity preferably, by the adjusting of acidity, specific surface and secondary pore, can obtain the diesel oil of highly selective, but products obtained therefrom is based on straight-chain paraffin, although such diesel oil has higher cetane value, but its condensation point height, combustionproperty is poor, needs further pour point depression and interpolation auxiliary agent to use.The use of zeolite is a qualitative leap of hydrocracking technology.It not only makes activity of such catalysts and stability significantly improve, and flexibility of operation is greatly strengthened, and the more important thing is that it makes in the alkane cracked product a certain amount of isomer is arranged.But present contain the processing that the zeolite hydrocracking catalyst all is applied to heavy crude, the cracking performance of these catalyzer is stronger relatively, is applied to the man-hour that adds of wax, and intermediate oil (comprising boat coal and diesel oil) selectivity is relatively poor.
The US4517074 patent disclosure a kind of hydrogenation crude cracking catalyst, produce 150-370 ℃ intermediate oil, this catalyzer is except using zeolite component, its characteristics are to use a kind of Al 2O 3-SiO 2Dispersion system, its SiO 2Content reaches 20-65%, though the amorphous aluminum silicide in the dispersion system has certain lytic activity, need be dispersed on the alumina substrate, to obtain the pore volume and the specific surface of a large amount of hydrogenation metal component of carrying.Though this catalyzer has higher middle distillates oil selectivity, generally more than 80%, activity is lower, reach 60v% and transform, and temperature of reaction is generally more than 400 ℃.
The object of the present invention is to provide a kind of activity good, isomery ratio height, the catalyzer that is used for the hydrocracking Fischer-Tropsch synthetic wax that the diesel oil selectivity is high.
The weight percent of catalyzer of the present invention consists of:
Y zeolite 30-50% cobalt oxide or nickel oxide 1-10%
Aluminum oxide or silicon-aluminum mixture 48.5-60%
Aforesaid catalyzer can also include Mo or the W oxide compound that weight percent is 5-20%.
Hydrocracking catalyst of the present invention has specific surface 250-400m 2/ g, pore volume 0.30-0.70ml/g, the feature of TPD acidity 0.75-1.5mmol/g.
Preparation of catalysts method of the present invention is as follows:
(1) NaY zeolite and ammonium nitrate solution are carried out ion-exchange 3~6 times, filtration, washing, oven dry obtain NH 4Y zeolite.
(2) with NH 4Y, ammonium nitrate, oxalic acid and handle after water mixes by 1: 1: 0.1~0.3: 10 weight ratio obtain super-hydrophobic Y zeolite.
(3) super-hydrophobic Y zeolite is contacted with the solution that contains Xiao Suangu or nickelous nitrate, obtain being impregnated with the Y zeolite (A) of hydrogenation metal.
(4) with (A) in 90~120 ℃ dry 4~6 hours down, in 400~600 ℃ down activation obtained (B) in 4~6 hours.
(5) with aluminum oxide with (B) mix after, add salpeter solution and prepare tackiness agent, become paste after rolling the enough time, use the banded extruder moulding, obtain the cylinder bar (C) of diameter 1.2~1.8mm.
(6) with (C) in 90~120 ℃ dry 4~6 hours down, in 400~600 ℃ of activation 4~6 hours down, obtain the catalyzer of the related use of hydrocracking process of the present invention.
Wherein the weight percent of each component consists of:
Y zeolite 30-50% cobalt oxide or nickel oxide 1-10%
Aluminum oxide or silicon-aluminum mixture 48.5-60%
Preparation of catalysts method of the present invention can also be as follows:
(1) NaY zeolite and ammonium nitrate solution are carried out ion-exchange 3~6 times, filtration, washing, oven dry obtain NH 4Y zeolite.
(2) with NH 4Y, ammonium nitrate, oxalic acid and handle after water mixes by 1: 1: 0.1~0.3: 10 weight ratio obtain super-hydrophobic Y zeolite.
(3) super-hydrophobic Y zeolite is contacted with the solution that contains metatungstic acid ammonia or molybdenum acid ammonia, obtain being impregnated with the Y zeolite (A) of promoter metal.
(4) with (A) in 90~120 ℃ dry 4~6 hours down, in 400~600 ℃ down activation obtained (B) in 4~6 hours.
(5) (B) contacted with the solution that contains Xiao Suangu or nickelous nitrate, obtains being impregnated with the Y zeolite of hydrogenation metal, with its in 90~120 ℃ dry 4~6 hours down, in 400~600 ℃ of activation 4~6 hours down.
(6) with aluminum oxide with (C) mix after, add salpeter solution and prepare tackiness agent, become paste after rolling the enough time, use the banded extruder moulding, obtain the cylinder bar (D) of diameter 1.2~1.8mm.
(7) with (D) in 90~120 ℃ dry 4~6 hours down, in 400~600 ℃ of activation 4~6 hours down, obtain the catalyzer of the related use of hydrocracking process of the present invention.
Wherein the weight percent of each component consists of:
Y zeolite 30-50% cobalt oxide or nickel oxide 1-10%
Aluminum oxide or silicon-aluminum mixture 48.5-60% Tungsten oxide 99.999 or molybdenum oxide 5-20%
The weight percent sum of each component is 100%.
Catalyzer of the present invention is used for Fischer-Tropsch synthetic wax production diesel oil processing condition: under the hydrogen existence condition, reaction pressure is 1.5-8.0MPa, hydrogen to oil volume ratio 800-5000, air speed 0.1-5.0h -1, temperature of reaction 280-400 ℃.
The present invention compared with prior art has following advantage:
(1) catalyzer of the present invention can carry out the selectivity chain rupture to straight chain saturation alkane, thereby has improved the yield of diesel oil distillate.
(2) catalyzer of the present invention carries out isomerization to product in cracking stock, makes the condensation point of the diesel oil distillate in the product lower, and combustionproperty is better.
(3) good catalyst activity of the present invention, diesel oil selectivity height.
Embodiment 1
Catalyst A with the inventive method preparation
(1) gets 500gNaY zeolite (production of Wenzhou catalyst plant), be added to the NH that 2L concentration is 2M 4NO 3In the solution, stir down at 90 ℃, ion-exchange 2 hours exchanges 5 times altogether, filters then, washs to neutrality, oven dry.
(2) with product in (1) and ammonium nitrate, oxalic acid, water by 1: 1: 0.1: 10 mixed, stirred 1 hour under the room temperature, be warming up to 90 ℃ after, constant temperature stirred 1 hour, dried, and obtained super-hydrophobic Y zeolite.
(3) in the clean container of a 1L, add solid Ni (NO 3) 26H 2O 174 grams, with the less water dissolving, dropping ammonia is to forming the transparent nickel ammonia solution of mazarine, PH=12.
(4) super-hydrophobic Y zeolite involved in the present invention 300 grams be impregnated in the above-mentioned solution, stir and make it to form stable slurry, place more than 12 hours.
(5) descended dry 4 hours at 120 ℃, 500 ℃ of following roastings 4 hours.
(6) material that 700 gram aluminum oxide and (5) are obtained mixes, and adds salpeter solution, becomes paste after rolling the enough time, uses the banded extruder moulding, obtains the cylinder bar of diameter 1.2~1.8mm.
(7) with the bar that obtains in (6) in 120 ℃ dry 4 hours down, obtained the catalyzer of the related use of hydrocracking process of the present invention in 4 hours in 500 ℃ of following roastings.Catalyzer consists of: Y zeolite 28.7%, nickel oxide 4.2%, aluminum oxide 67.1%.
The physico-chemical property of catalyzer sees Table 1, and evaluation result sees Table 2.
Embodiment 2
Catalyst B with the inventive method preparation
(1) in the clean container of a 1L, adds metatungstic acid ammonia 93 grams, dissolve with less water.
(2) super-hydrophobic Y zeolite of the present invention 300 grams be impregnated in this solution, place more than 12 hours, 110 ℃ of dryings 6 hours, 400 ℃ of roastings 6 hours.
All the other preparation process are with embodiment 1.Catalyzer consists of: Y zeolite 27.3%, nickel oxide 5.9%, aluminum oxide 58.6%, Tungsten oxide 99.999 8.2%.
The physico-chemical property of catalyzer sees Table 1, and evaluation result sees Table 2.
Embodiment 3
Catalyzer C with the inventive method preparation.
(1) gets 500gNaY zeolite (production of Wenzhou catalyst plant), be added to the NH that 2L concentration is 2M 4NO 3In the solution, stir down at 90 ℃, ion-exchange 2 hours exchanges 6 times altogether, filters then, washs to neutrality, oven dry.
(2) with product in (1) and ammonium nitrate, oxalic acid, water by 1: 1: 0.3: 10 mixed, stirred 1 hour under the room temperature, be warming up to 90 ℃ after, constant temperature stirred 1 hour, dried, and obtained super-hydrophobic Y zeolite.
(3) all the other preparation process are with embodiment 2.Catalyzer consists of: Y zeolite 37.3%, nickel oxide 5.7%, aluminum oxide 48.5%, Tungsten oxide 99.999 8.5%.
The physico-chemical property of catalyzer sees Table 1, and evaluation result sees Table 2.
Embodiment 4
Catalyzer D with the inventive method preparation.
The Preparation of catalysts process is with embodiment 2.Catalyzer consists of: Y zeolite 46.9%, nickel oxide 8.3%, aluminum oxide 38.5%, molybdenum oxide 6.3%.
The physico-chemical property of catalyzer sees Table 1, and evaluation result sees Table 2.
Embodiment 5
Catalyzer E with the inventive method preparation.
(1) gets 500gNaY zeolite (production of Wenzhou catalyst plant), be added to the NH that 2L concentration is 2M 4NO 3In the solution, stir down at 90 ℃, ion-exchange 2 hours exchanges 6 times altogether, filters then, washs to neutrality, oven dry.
(2) with product in (1) and ammonium nitrate, oxalic acid, water by 1: 1: 0.2: 10 mixed, stirred 1 hour under the room temperature, be warming up to 90 ℃ after, constant temperature stirred 1 hour, dried, and obtained super-hydrophobic Y zeolite.
(3) in the clean container of a 1L, add metatungstic acid ammonia, dissolve with aquae destillata.
(4) super-hydrophobic Y zeolite of the present invention 300 grams be impregnated in this solution, place more than 12 hours, 90 ℃ of dryings 6 hours, 400 ℃ of roastings 6 hours.
(5) in the clean container of a 1L, add Xiao Suangu, dissolve with aquae destillata.
(6) material that obtains in the step (4) 300 grams be impregnated in this solution, place more than 12 hours, 90 ℃ of dryings 6 hours, 400 ℃ of roastings 6 hours.
(7) make shaping of catalyst by the step among the embodiment 1 (6) (7).Catalyzer consists of: Y zeolite 37.3%, cobalt oxide 5.7%, aluminum oxide 48.5%, Tungsten oxide 99.999 8.5%.
The physico-chemical property of catalyzer sees Table 1, and evaluation result sees Table 2.
The physico-chemical property of table 1 catalyzer
Catalyzer A B C D E
Specific surface (m 2/g) 337 262 359 397 367
Pore volume (ml/g) 0.55 0.33 0.52 0.63 0.48
>2.0nm pore distribution, % 43 62 71 68 57
TPD acidity, mmol/g 1.2 1.0 0.8 0.9 1.1
The reaction evaluating result of table 2 catalyzer
Catalyzer A B C D E
Temperature of reaction (℃) 320 320 320 320 320
Transformation efficiency (w%) 70 68 75 75 73
Diesel oil selectivity (%) 35.2 42.1 44.8 41.7 40.3

Claims (5)

1. produce the catalyzer of diesel oil by Fischer-Tropsch synthetic wax for one kind, it is characterized in that the weight percent of catalyzer consists of:
Y zeolite 30-50% cobalt oxide or nickel oxide 1-10%
Aluminum oxide or silicon-aluminum mixture 48.5-60%;
The specific surface area 250-400m of catalyzer 2/ g, pore volume 0.30-0.70ml/g, TPD acidity 0.75-1.5mmol/g.
2. a kind of catalyzer by Fischer-Tropsch synthetic wax production diesel oil according to claim 1 is characterized in that described catalyzer also includes Mo or the W oxide compound that weight percent is 5-20%, and the weight percent sum of each component is 100%.
3. a Preparation of catalysts method of producing diesel oil by Fischer-Tropsch synthetic wax is characterized in that the preparation method comprises the steps:
(1) NaY zeolite and ammonium nitrate solution are carried out ion-exchange 3~6 times, filtration, washing, oven dry obtain NH 4Y zeolite;
(2) with NH 4Y, ammonium nitrate, oxalic acid and handle after water mixes by 1: 1: 0.1~0.3: 10 weight ratio obtain super-hydrophobic Y zeolite;
(3) super-hydrophobic Y zeolite is contacted with the solution that contains Xiao Suangu or nickelous nitrate, obtain being impregnated with the Y zeolite (A) of hydrogenation metal;
(4) with (A) in 90~120 ℃ dry 4~6 hours down, in 400~600 ℃ down activation obtained (B) in 4~6 hours;
(5) with aluminum oxide with (B) mix after, add salpeter solution and prepare tackiness agent, become paste after rolling the enough time, use the banded extruder moulding, obtain the cylinder bar (C) of diameter 1.2~1.8mm;
(6) with (C) in 90~120 ℃ dry 4~6 hours down, in 400~600 ℃ of activation 4~6 hours down, obtain the catalyzer of the related use of hydrocracking process of the present invention;
Wherein the weight percent of each component consists of:
Y zeolite 30-50% cobalt oxide or nickel oxide 1-10%
Aluminum oxide or silicon-aluminum mixture 48.5-60%.
4. a Preparation of catalysts method of producing diesel oil by Fischer-Tropsch synthetic wax is characterized in that the preparation method comprises the steps:
(1) NaY zeolite and ammonium nitrate solution are carried out ion-exchange 3~6 times, filtration, washing, oven dry obtain NH 4Y zeolite;
(2) with NH 4Y, ammonium nitrate, oxalic acid and handle after water mixes by 1: 1: 0.1~0.3: 10 weight ratio obtain super-hydrophobic Y zeolite;
(3) super-hydrophobic Y zeolite is contacted with the solution that contains metatungstic acid ammonia or molybdenum acid ammonia, obtain being impregnated with the Y zeolite (A) of promoter metal;
(4) with (A) in 90~120 ℃ dry 4~6 hours down, in 400~600 ℃ down activation obtained (B) in 4~6 hours;
(5) (B) contacted with the solution that contains Xiao Suangu or nickelous nitrate, obtains being impregnated with the Y zeolite of hydrogenation metal, with its in 90~120 ℃ dry 4~6 hours down, in 400~600 ℃ of activation 4~6 hours down;
(6) with aluminum oxide with (C) mix after, add salpeter solution and prepare tackiness agent, become paste after rolling the enough time, use the banded extruder moulding, obtain the cylinder bar (D) of diameter 1.2~1.8mm;
(7) with (D) in 90~120 ℃ dry 4~6 hours down, in 400~600 ℃ of activation 4~6 hours down, obtain the catalyzer of the related use of hydrocracking process of the present invention;
Wherein the weight percent of each component consists of:
Y zeolite 30-50% cobalt oxide or nickel oxide 1-10%
Aluminum oxide or silicon-aluminum mixture 48.5-60% Tungsten oxide 99.999 or molybdenum oxide 5-20%
The weight percent sum of each component is 100%.
5. one kind is used for the Application of Catalyst method that Fischer-Tropsch synthetic wax is produced diesel oil, it is characterized in that processing condition are: under the hydrogen existence condition, and reaction pressure 1.5-8.0MPa, hydrogen to oil volume ratio 800-5000, air speed 0.1-5.0h -1, temperature of reaction 280-400 ℃.
CNB011114398A 2001-03-09 2001-03-09 Catalyst for producing diesel oil from Fischer-Tropsch synthetic wax and its prepn and use Expired - Lifetime CN1162517C (en)

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Publication number Priority date Publication date Assignee Title
CN100345944C (en) * 2005-09-08 2007-10-31 中科合成油技术有限公司 Hydroconversion process of uncured Fisher-Tropsch process synthesized oil product
CN105618111B (en) * 2014-11-03 2018-10-12 中国石油化工股份有限公司 A kind of preparation method and hydrogenation technique of catalytic diesel oil hydrogenation conversion catalyst
CN105983407B (en) * 2015-01-29 2018-07-13 中国石油天然气股份有限公司 A kind of Co based Fischer-Tropsch synthesis catalyst and preparation method thereof for producing naphtha and drilling fluid

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