CN102580785A - Hydrated alumina forming matter and preparation method thereof - Google Patents

Hydrated alumina forming matter and preparation method thereof Download PDF

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CN102580785A
CN102580785A CN2011100932341A CN201110093234A CN102580785A CN 102580785 A CN102580785 A CN 102580785A CN 2011100932341 A CN2011100932341 A CN 2011100932341A CN 201110093234 A CN201110093234 A CN 201110093234A CN 102580785 A CN102580785 A CN 102580785A
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article shaped
hydrated alumina
cellulose ether
crushing strength
benchmark
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CN102580785B (en
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杨清河
曾双亲
李丁健一
刘滨
孙淑玲
任亮
聂红
李大东
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Sinopec Research Institute of Petroleum Processing
China Petroleum and Chemical Corp
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Sinopec Research Institute of Petroleum Processing
China Petroleum and Chemical Corp
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Abstract

Provided are hydrated alumina forming matter and a preparation method thereof. The hydrated alumina forming matter comprises hydrated alumina and cellulose ether. The radial crushing strength of the forming matter is larger than or equal to 12N/mm, the water absorption rate is 0.4 to 1.5, and a delta value is smaller than or equal to 10%. Delta = ((Q1-12)/Q1)*100%, wherein the Q1 is the radial crushing strength of the hydrated alumina forming matter, and the Q2 is the radial crushing strength of the hydrated alumina forming matter soaked for 30 minutes in water and dried. The hydrated alumina forming matter is high in radial crushing strength and water absorption rate and low in strength loss rate, and can be directly used as an adsorbent or a carrier without being roasted.

Description

A kind of hydrated alumina article shaped and preparation method thereof
Technical field
The present invention relates to a kind of hydrated alumina article shaped and preparation method thereof.
Background technology
In conventional method, aluminium oxide, particularly gama-alumina, because of it has better pore structure, specific surface and heat-resistant stability, the carrier of Chang Zuowei adsorbent or loaded catalyst uses.This aluminium oxide is usually by hydrated alumina, as boehmite etc. through moulding, dry after, high-temperature roasting obtains again.
Based on above-mentioned cognition, and meet the characteristics that water or aqueous solution are easy to efflorescence, it is generally acknowledged and can not the hydrated alumina article shaped directly be used as adsorbent or carrier according to the hydrated alumina article shaped of conventional method preparation.
Summary of the invention
The technical problem that the present invention will solve provides a kind of new, hydrated alumina article shaped of can be directly using as adsorbent or carrier and preparation method thereof.
The present invention relates to following invention:
1, a kind of hydrated alumina article shaped contains hydrated alumina and cellulose ether, and the radially crushing strength of said article shaped is more than or equal to 12N/mm, and water absorption rate is 0.4-1.5, and the δ value is smaller or equal to 10%; Wherein, δ=((Q1-Q2)/Q1) * 100%, Q1 are radially crushing strength of hydrated alumina article shaped, and Q2 is that the hydrated alumina article shaped is through water logging bubble 30 minutes, through dried radially crushing strength.
According to 1 described article shaped, it is characterized in that 2, the radially crushing strength of said article shaped is 15-30N/mm, water absorption rate is 0.6-1, and δ is smaller or equal to 5%.
3, according to 1 or 2 described article shaped, it is characterized in that, is benchmark with said article shaped, and the content of said cellulose ether is 0.5-8 weight %.
4, according to 3 described article shaped, it is characterized in that, is benchmark with said article shaped, and the content of said cellulose ether is 1-6 weight %.
5, according to 4 described article shaped, it is characterized in that, is benchmark with said article shaped, and the content of said cellulose ether is 2-5 weight %.
According to 1 described article shaped, it is characterized in that 6, said cellulose ether is selected from methylcellulose, HEMC, the hydroxypropyl methylcellulose one or more.
According to 6 described article shaped, it is characterized in that 7, said cellulose ether is methylcellulose, HEMC and their mixture.
According to 1 described article shaped, it is characterized in that 8, said hydrated alumina is selected from one or more in boehmite, boehmite, aluminium hydroxide, three water-aluminum hydroxides.
According to 8 described article shaped, it is characterized in that 9, said hydrated alumina is a boehmite.
10, according to 1 described article shaped, it is characterized in that, contain starch, is benchmark with said article shaped, and said contents of starch is no more than 8 weight %.
According to 1 described article shaped, it is characterized in that 11, said starch is the sesbania powder, is benchmark with said article shaped, and said contents of starch is no more than 5 weight %.
12, a kind of preparation method of hydrated alumina article shaped; Comprise hydrated alumina, cellulose ether and water mixing, moulding and dry; The consumption of said each component and moulding and dry condition make the radially crushing strength of final molding thing more than or equal to 12N/mm; Water absorption rate is 0.4-1.5, and the δ value is smaller or equal to 10%; Wherein, δ=((Q1-Q2)/Q1) * 100%, Q1 are radially crushing strength of hydrated alumina article shaped, and Q2 is that the hydrated alumina article shaped is through water logging bubble 30 minutes, through dried radially crushing strength.
According to 12 described methods, it is characterized in that 13, the consumption of said each component and moulding make that with dry condition the radially crushing strength of final said article shaped is 15-30N/mm, water absorption rate is 0.6-1, and δ is smaller or equal to 5%.
14, according to 12 or 13 described methods; It is characterized in that, be benchmark with said article shaped, and it is 0.5-8 weight % that the consumption of each component makes the content of the said cellulose ether in the final molding thing; Said drying condition comprises: 60 ℃ of temperature are to less than 350 ℃, 1-48 hour drying time.
15, according to 14 described methods, it is characterized in that, is benchmark with said article shaped, and it is 1-6 weight % that the consumption of each component makes the content of the said cellulose ether in the final molding thing, and said drying condition comprises: temperature 80-300 ℃, and 2-24 hour drying time.
16, according to 15 described methods, it is characterized in that, is benchmark with said article shaped, and it is 2-5 weight % that the consumption of each component makes the content of the said cellulose ether in the final molding thing, and said drying condition comprises: temperature 120-250 ℃, and 2-12 hour drying time.
According to 12 described methods, it is characterized in that 17, said cellulose ether is selected from methylcellulose, HEMC, the hydroxypropyl methylcellulose one or more.
According to 17 described methods, it is characterized in that 18, said cellulose ether is methylcellulose, HEMC and their mixture.
According to 12 described methods, it is characterized in that 19, said hydrated alumina is selected from one or more in boehmite, boehmite, aluminium hydroxide, three water-aluminum hydroxides.
According to 19 described methods, it is characterized in that 20, said hydrated alumina is a boehmite.
21, according to 12 described methods, it is characterized in that, comprise a step of in forming process, introducing starch, is benchmark with said article shaped, and the introducing amount of said starch is no more than 8 weight %.
According to 21 described article shaped, it is characterized in that 22, said starch is the sesbania powder, is benchmark with said article shaped, and the introducing amount of said starch is no more than 5 weight %.
According to hydrated alumina article shaped provided by the invention, the radially crushing strength of preferred said article shaped is 15-30N/mm, and water absorption rate is 0.6-1, and δ is smaller or equal to 5%.Wherein, δ=((Q1-Q2)/Q1) * 100%, Q1 are radially crushing strength of hydrated alumina article shaped, and Q2 is that the hydrated alumina article shaped was steeped 30 minutes through water logging, through the radially crushing strength of 120 ℃ of heating, dryings after 4 hours.The size of δ value is representing the hydrated alumina article shaped through the variation (or be called loss of strength rate) of water logging bubble anteroposterior diameter to crushing strength.Among the present invention, the said article shaped radially measuring method of crushing strength is carried out according to RIPP 25-90 catalyst compressive resistance determination method, about article shaped radially the concrete steps measured of crushing strength at RIPP25-90 detailed introduction is arranged, do not give unnecessary details here.
Said water absorption rate is meant that dry hydrated alumina article shaped soaks the weight value added behind the 30min with excessive deionized water.The present invention adopts following concrete grammar to measure: earlier with 120 ℃ of oven dry of testing sample 4 hours.Take out sample, be positioned over and be cooled to room temperature in the desiccator, sieve with 40 mesh standard sieves; (numbering: w1) testing sample adds the 50g deionized water, immersion 30min to take by weighing oversize 20g; Filter, solid phase drains 5min, weighing solid phase weight (numbering: w2); Solid phase is transferred in the baking oven, and 120 ℃ of heating, dryings 4 hours are positioned over and are cooled to room temperature in the desiccator.Water absorption rate=(w1-w2)/w1
Under the prerequisite that the radially crushing strength that is enough to make article shaped, water absorption rate and loss of strength rate meet the demands; The present invention is to the not special restriction of the content of cellulose ether; In concrete embodiment, be benchmark with hydrated alumina article shaped total amount, the content of cellulose ether is preferably 0.5-8 weight %; Further be preferably 1-6 weight %, more be preferably 2-5 weight %.Said cellulose ether preferably in methylcellulose, HEMC, hydroxypropyl methylcellulose one or more, further preferred methylcellulose, HEMC and their mixture wherein.
According to hydrated alumina article shaped provided by the invention, wherein can contain the adjuvant component that does not influence or be of value to radially crushing strength, water absorption rate and the δ value of improving said article shaped.For example, contain starch and add component, said starch can be the powder that is obtained through pulverizing by vegetable seeds arbitrarily, like the sesbania powder.
Said hydrated alumina is selected from any hydrated alumina that can be used as adsorbent and catalyst carrier precursor, for example, can be boehmite, boehmite, aluminium hydroxide, three water-aluminum hydroxides, preferred boehmite.
According to the preparation method of hydrated alumina article shaped provided by the invention, described forming method can be a prior art arbitrarily, to this, and the not special restriction of the present invention.For example, said forming method can be the forming method of extrusion, spraying, round as a ball, compressing tablet and their combination.For guaranteeing carrying out smoothly of moulding; When moulding, can in material (being the mixture of hydrated alumina and cellulose ether), introduce auxiliary agent and water etc. here, for example, when adopting the moulding of extrusion method; Comprise with described hydrated alumina and cellulose ether with water, contain or do not contain extrusion aid and mix; Extrusion molding then obtains wet bar, obtains article shaped of the present invention through drying again.Said auxiliary agent is selected from starch, and said starch can be the powder that is obtained through pulverizing by vegetable seeds arbitrarily, like the sesbania powder.Preferred forming method is the method for extruded moulding.
Hydrated alumina article shaped provided by the invention has lower loss of strength rate after higher radially crushing strength, water absorption rate and the suction, can directly use as adsorbent or carrier without roasting.
The specific embodiment
To further specify the present invention through embodiment below.
Agents useful for same in the instance except that specifying, is chemically pure reagent.
Embodiment 1
Get the boehmite powder 100g that catalyst Chang Ling branch company produces, add the 4.0g methylcellulose, 3.0g sesbania powder and 95mL deionized water fully mix, through banded extruder mix pinch even after, extruded moulding obtains the wet article shaped of aluminium hydroxide.Wet hydrogen aluminium oxide article shaped was positioned in the baking oven 150 ℃ of dryings 12 hours.Measure radially crushing strength, water absorption rate and the δ value (loss of strength rate) of dry aftershaping carrier, the result lists in table 1.
Embodiment 2
Get the boehmite powder 50g that catalyst Chang Ling branch company produces; Self-control unformed aluminium hydroxide powder 50g; Add the 2.0g methylcellulose, 3.0g HEMC and 95mL deionized water fully mix; After pinching evenly through banded extruder is mixed, extruded moulding obtains the wet article shaped of aluminium hydroxide.Wet hydrogen aluminium oxide article shaped was positioned in the baking oven 220 ℃ of dryings 6 hours.Measure radially crushing strength, water absorption rate and the δ value of dry aftershaping carrier, the result lists in table 1.
Embodiment 3
Get the boehmite powder 60g that catalyst Chang Ling branch company produces; Three water-aluminum hydroxide 40g add the 1.0g methylcellulose, the 2.0g hydroxypropyl methylcellulose; 3.0g sesbania powder and 95mL deionized water; Fully mix, through banded extruder mix pinch evenly after, extruded moulding obtains the wet article shaped of aluminium hydroxide.Wet hydrogen aluminium oxide article shaped was positioned in the baking oven 80 ℃ of dryings 12 hours.Measure radially crushing strength, water absorption rate and the δ value of dry aftershaping carrier, the result lists in table 1.
Embodiment 4
Get the boehmite SB powder 100g that Sasol company produces, add 3.0g HEMC and 90mL deionized water, fully mix, through banded extruder mix pinch even after, extruded moulding obtains the moulding bar.Aluminium hydroxide moulding bar was positioned in the baking oven 150 ℃ of dryings 12 hours.Measure radially crushing strength, water absorption rate and the δ value of dry aftershaping carrier, the result lists in table 1.
Embodiment 5
Get the boehmite SB powder 100g that Sasol company produces, add the 3.0g HEMC, the 2g hydroxypropyl methylcellulose; 3.0g sesbania powder and 90mL deionized water; Fully mix, through banded extruder mix pinch evenly after, extruded moulding obtains the moulding bar.Aluminium hydroxide moulding bar was positioned in the baking oven 250 ℃ of dryings 4 hours.Measure radially crushing strength, water absorption rate and the δ value of dry aftershaping carrier, the result lists in table 1.
Embodiment 6
Get the boehmite powder 100g that Yantai, Shandong permanent brightness chemical industry Co., Ltd produces, add the 5.0g hydroxypropyl methylcellulose, 3.0g sesbania powder and 90mL deionized water fully mix, through banded extruder mix pinch even after, extruded moulding obtains the moulding bar.The moulding bar was positioned in the baking oven 120 ℃ of dryings 4 hours.Measure radially crushing strength, water absorption rate and the δ value of dry aftershaping carrier, the result lists in table 1.
Comparative Examples 1
Get the boehmite powder 100g that catalyst Chang Ling branch company produces, add red fuming nitric acid (RFNA) 2.5mL, 3.0g sesbania powder and 95mL deionized water fully mix, through banded extruder mix pinch even after, extruded moulding obtains the moulding bar.The moulding bar was positioned in the baking oven 80 ℃ of dryings 4 hours.Measure the intensity of dried strip.Take by weighing 10g gained dried strip and add the 50mL deionized water, be soaked in water 30 minutes, measure radially crushing strength, water absorption rate and the δ value of dry aftershaping carrier, the result lists in table 1.
Comparative Examples 2
Get the boehmite SB powder 100g that Condea company produces, add 20ml aluminium colloidal sol, 3.0g sesbania powder and 90mL deionized water fully mix, through banded extruder mix pinch even after, extruded moulding obtains the moulding bar.The moulding bar was positioned in the baking oven 150 ℃ of dryings 4 hours.The moulding bar was positioned in the baking oven 150 ℃ of dryings 4 hours.Measure the intensity of dried strip.Take by weighing 10g gained dried strip and add the 50mL deionized water, be soaked in water 30 minutes, measure radially crushing strength, water absorption rate and the δ value of dry aftershaping carrier, the result lists in table 1.
Comparative Examples 3
Get the boehmite powder 100g that Yantai, Shandong permanent brightness chemical industry Co., Ltd produces, add 5.0mL acetic acid, 3.0g sesbania powder and 90mL deionized water fully mix, through banded extruder mix pinch even after, extruded moulding obtains the moulding bar.The moulding bar was positioned in the baking oven 180 ℃ of dryings 4 hours.Measure the intensity of dried strip.Take by weighing 10g gained dried strip and add the 50mL deionized water, be soaked in water 30 minutes, measure radially crushing strength, water absorption rate and the δ value of dry aftershaping carrier, the result lists in table 1.
Comparative Examples 4
Get the boehmite powder 100g that catalyst Chang Ling branch company produces, add red fuming nitric acid (RFNA) 2.5mL, 3.0g sesbania powder and 95mL deionized water fully mix, through banded extruder mix pinch even after, extruded moulding obtains the moulding bar.The moulding bar was positioned in the baking oven 80 ℃ of dryings 4 hours.600 ℃ of roastings of dried strip 4 hours.Measure radially crushing strength, water absorption rate and the δ value of roasting aftershaping carrier, the result lists in table 1.
Table 1
Figure BSA00000473404500071
Soaking effect when this embodiment 7-12 and Comparative Examples 5-10 are used to hydrated alumina article shaped provided by the invention is described as drier.
Embodiment 7
The boehmite article shaped dried strip of getting among the embodiment 1 was put into 600 ℃ of roastings of Muffle furnace after 4 hours, and recording butt is 71.2%.
Measure hygroscopic capacity: get the boehmite dried strip that N1 (g) embodiment 1 obtains and put into the desiccator container that the bottom is equipped with deionized water; Room temperature held 10 days; The N2 (g) that weighs, hygroscopic capacity=((N2-N1)/(butt * N1)) * 100% (down with), the result lists in table 2.
Comparative Examples 5
Get boehmite article shaped dried strip among the embodiment 1 through the article shaped of 600 ℃ of roastings after 4 hours, measure its hygroscopic capacity, the result lists in table 2.
Embodiment 8
The boehmite article shaped dried strip of getting among the embodiment 2 was put into 600 ℃ of roastings of Muffle furnace after 4 hours, and recording butt is 70.3%.
Measure the hygroscopic capacity of the boehmite dried strip that embodiment 2 obtains according to embodiment 7 with quadrat method, the result lists in table 2.
Comparative Examples 6
Get boehmite article shaped dried strip among the embodiment 2 through the article shaped of 600 ℃ of roastings after 4 hours.Measure its hygroscopic capacity, the result lists in table 2.
Embodiment 9
The boehmite article shaped dried strip of getting among the embodiment 3 was put into 600 ℃ of roastings of Muffle furnace after 4 hours, and recording butt is 68.9%.
Measure the hygroscopic capacity of the boehmite dried strip that embodiment 3 obtains according to embodiment 7 with quadrat method, the result lists in table 2.
Comparative Examples 7
Get boehmite article shaped dried strip among the embodiment 3 through the article shaped of 600 ℃ of roastings after 4 hours.Measure its hygroscopic capacity, the result lists in table 2.
Embodiment 10
The boehmite article shaped dried strip of getting among the embodiment 4 was put into 600 ℃ of roastings of Muffle furnace after 4 hours, and recording butt is 68.9%.
Measure the hygroscopic capacity of the boehmite dried strip that embodiment 4 obtains according to embodiment 7 with quadrat method, the result lists in table 2.
Comparative Examples 8
Get boehmite article shaped dried strip among the embodiment 4 through the article shaped of 600 ℃ of roastings after 4 hours.Measure its hygroscopic capacity, the result lists in table 2.
Embodiment 11
The boehmite article shaped dried strip of getting among the embodiment 5 was put into 600 ℃ of roastings of Muffle furnace after 4 hours, and recording butt is 68.9%.
Measure the hygroscopic capacity of the boehmite dried strip that embodiment 5 obtains according to embodiment 7 with quadrat method, the result lists in table 2.
Contrast 9
Get boehmite article shaped dried strip among the embodiment 5 through the article shaped of 600 ℃ of roastings after 4 hours.Measure its hygroscopic capacity, the result lists in table 2.
Embodiment 12
The boehmite article shaped dried strip of getting among the embodiment 6 was put into 600 ℃ of roastings of Muffle furnace after 4 hours, and recording butt is 68.9%.
Measure the hygroscopic capacity of the boehmite dried strip that embodiment 6 obtains according to embodiment 7 with quadrat method, the result lists in table 2.
Comparative Examples 10
Get boehmite article shaped dried strip among the embodiment 6 through the article shaped of 600 ℃ of roastings after 4 hours.Measure its hygroscopic capacity, the result lists in table 2.
Table 2
Embodiment Weight Butt, % Hygroscopic capacity/%
7 20.0 71.2 67.8
Comparative Examples 5 20.0 100.0 63.8
8 20.0 70.3 56.8
Comparative Examples 6 20.0 100.0 54.6
9 20.0 68.9 75.3
Comparative Examples 7 20.0 100.0 73.1
10 20.0 67.8 55.9
Comparative Examples 8 20.0 100.0 54.8
11 20.0 78.2 56.7
Comparative Examples 9 20.0 100.0 54.7
12 20.0 71.3 65.9
Comparative Examples 10 20.0 100.0 64.8

Claims (22)

1. a hydrated alumina article shaped contains hydrated alumina and cellulose ether, and the radially crushing strength of said article shaped is more than or equal to 12N/mm, and water absorption rate is 0.4-1.5, and the δ value is smaller or equal to 10%; Wherein, δ=((Q1-Q2)/Q1) * 100%, Q1 are radially crushing strength of hydrated alumina article shaped, and Q2 is that the hydrated alumina article shaped is through water logging bubble 30 minutes, through dried radially crushing strength.
2. according to 1 described article shaped, it is characterized in that the radially crushing strength of said article shaped is 15-30N/mm, water absorption rate is 0.6-1, and δ is smaller or equal to 5%.
3. according to 1 or 2 described article shaped, it is characterized in that, is benchmark with said article shaped, and the content of said cellulose ether is 0.5-8 weight %.
4. according to 3 described article shaped, it is characterized in that, is benchmark with said article shaped, and the content of said cellulose ether is 1-6 weight %.
5. according to 4 described article shaped, it is characterized in that, is benchmark with said article shaped, and the content of said cellulose ether is 2-5 weight %.
6. according to 1 described article shaped, it is characterized in that said cellulose ether is selected from methylcellulose, HEMC, the hydroxypropyl methylcellulose one or more.
7. according to 6 described article shaped, it is characterized in that said cellulose ether is methylcellulose, HEMC and their mixture.
8. according to 1 described article shaped, it is characterized in that said hydrated alumina is selected from one or more in boehmite, boehmite, aluminium hydroxide, three water-aluminum hydroxides.
9. according to 8 described article shaped, it is characterized in that said hydrated alumina is a boehmite.
10. according to 1 described article shaped, it is characterized in that, contain starch, is benchmark with said article shaped, and said contents of starch is no more than 8 weight %.
11., it is characterized in that said starch is the sesbania powder according to 1 described article shaped, be benchmark with said article shaped, said contents of starch is no more than 5 weight %.
12. the preparation method of a hydrated alumina article shaped; Comprise hydrated alumina, cellulose ether and water mixing, moulding and dry; The consumption of said each component and moulding and dry condition make the radially crushing strength of final molding thing more than or equal to 12N/mm; Water absorption rate is 0.4-1.5, and the δ value is smaller or equal to 10%; Wherein, δ=((Q1-Q2)/Q1) * 100%, Q1 are radially crushing strength of hydrated alumina article shaped, and Q2 is that the hydrated alumina article shaped is through water logging bubble 30 minutes, through dried radially crushing strength.
13., it is characterized in that the consumption of said each component and moulding make that with dry condition the radially crushing strength of final said article shaped is 15-30N/mm according to 12 described methods, water absorption rate is 0.6-1, δ is smaller or equal to 5%.
14. according to 12 or 13 described methods; It is characterized in that, be benchmark with said article shaped, and it is 0.5-8 weight % that the consumption of each component makes the content of the said cellulose ether in the final molding thing; Said drying condition comprises: 60 ℃ of temperature are to less than 350 ℃, 1-48 hour drying time.
15., it is characterized in that according to 14 described methods, be benchmark with said article shaped, it is 1-6 weight % that the consumption of each component makes the content of the said cellulose ether in the final molding thing, said drying condition comprises: temperature 80-300 ℃, 2-24 hour drying time.
16., it is characterized in that according to 15 described methods, be benchmark with said article shaped, it is 2-5 weight % that the consumption of each component makes the content of the said cellulose ether in the final molding thing, said drying condition comprises: temperature 120-250 ℃, 2-12 hour drying time.
17., it is characterized in that said cellulose ether is selected from methylcellulose, HEMC, the hydroxypropyl methylcellulose one or more according to 12 described methods.
18., it is characterized in that said cellulose ether is methylcellulose, HEMC and their mixture according to 17 described methods.
19., it is characterized in that said hydrated alumina is selected from one or more in boehmite, boehmite, aluminium hydroxide, three water-aluminum hydroxides according to 12 described methods.
20., it is characterized in that said hydrated alumina is a boehmite according to 19 described methods.
21., it is characterized in that according to 12 described methods, comprise a step of in forming process, introducing starch, be benchmark with said article shaped, the introducing amount of said starch is no more than 8 weight %.
22., it is characterized in that said starch is the sesbania powder according to 21 described article shaped, be benchmark with said article shaped, the introducing amount of said starch is no more than 5 weight %.
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CN101316805A (en) * 2005-11-30 2008-12-03 康宁股份有限公司 Narrow pore size distribution cordierite ceramic honeycomb articles and methods for manufacturing same
CN1907567A (en) * 2006-08-16 2007-02-07 天津化工研究设计院 Forming method for porous composite metallic oxide catalytic carrier
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