CN102513059A - Method for preparing 13X molecular sieve free of binder - Google Patents
Method for preparing 13X molecular sieve free of binder Download PDFInfo
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- CN102513059A CN102513059A CN2011104190798A CN201110419079A CN102513059A CN 102513059 A CN102513059 A CN 102513059A CN 2011104190798 A CN2011104190798 A CN 2011104190798A CN 201110419079 A CN201110419079 A CN 201110419079A CN 102513059 A CN102513059 A CN 102513059A
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- molecular sieve
- binder free
- product
- binder
- preparation
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- 239000002808 molecular sieve Substances 0.000 title claims abstract description 34
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000011230 binding agent Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 45
- 239000000047 product Substances 0.000 claims abstract description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000013067 intermediate product Substances 0.000 claims abstract description 13
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 11
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 11
- 239000004927 clay Substances 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 9
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 9
- 238000005406 washing Methods 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 5
- 230000000996 additive effect Effects 0.000 claims abstract description 5
- 238000002360 preparation method Methods 0.000 claims description 17
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 14
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 14
- 238000005469 granulation Methods 0.000 claims description 10
- 230000003179 granulation Effects 0.000 claims description 10
- 239000000284 extract Substances 0.000 claims description 8
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 8
- 235000018553 tannin Nutrition 0.000 claims description 8
- 229920001864 tannin Polymers 0.000 claims description 8
- 239000001648 tannin Substances 0.000 claims description 8
- 229910021536 Zeolite Inorganic materials 0.000 claims description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 4
- 239000010457 zeolite Substances 0.000 claims description 4
- HPTYUNKZVDYXLP-UHFFFAOYSA-N aluminum;trihydroxy(trihydroxysilyloxy)silane;hydrate Chemical group O.[Al].[Al].O[Si](O)(O)O[Si](O)(O)O HPTYUNKZVDYXLP-UHFFFAOYSA-N 0.000 claims description 3
- 229960000892 attapulgite Drugs 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 229910052625 palygorskite Inorganic materials 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 2
- 229910001948 sodium oxide Inorganic materials 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 15
- 238000001035 drying Methods 0.000 abstract description 8
- 239000011259 mixed solution Substances 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000003795 desorption Methods 0.000 abstract description 2
- 238000001354 calcination Methods 0.000 abstract 3
- 239000012467 final product Substances 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 238000007873 sieving Methods 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 238000004438 BET method Methods 0.000 description 6
- 230000009466 transformation Effects 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000002336 sorption--desorption measurement Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000000274 adsorptive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052621 halloysite Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
The invention discloses a method for preparing a 13X molecular sieve free of binder, comprising the following steps: mixing 13X molecular sieve raw powder with halloysites and attapulgites clay; adding an additive and then granulating; sieving; drying; calcining at a high temperature; soaking the intermediate product of the calcination into a sodium silicate mixed solution of sodium hydroxide and silicon dioxide; washing and drying; and calcining the granular product at a high temperature again to obtain the final product of 13X molecular sieve free of binder. Compared with a 13X molecular sieve prepared by the prior art, the 13X molecular sieve free of binder disclosed by the invention has larger effective adsorption capacity, higher adsorption rate and desorption rate and higher mechanical strength, and can be applied to pressure swing adsorption hydrogen-making, pressure swing adsorption oxygen-making technology, adsorption separation of gas and liquid and the like.
Description
Technical field
It is dedicated molecular sieve used to the present invention relates to a kind of novel binder free 13X hydrogen manufacturing, is used for transformation absorption hydrogen manufacturing, also can be used for the aspects such as adsorbing separation of omnibus control system, gas-liquid.
Background technology
Transformation adsorption separation technology (PSA) is in recent years in the new isolation technics that emerges of adsorptive separation technology; Its principle is to utilize gas composition; The difference of characterization of adsorption on adsorbent; And adsorption capacity realizes the separation or the purification of gas along with the characteristic of change in pressure through the pressure change procedure.And adsorbent is the key of transformation adsorption separation technology (PSA), and the performance of adsorbent directly influences separating effect, purity, yield, life-span etc.
5A type molecular sieve, binder free 5A type molecular sieve and the common 13X type molecular sieves of adopting such as transformation absorption (PSA) adsorbent more.5A type molecular sieve specific area is smaller, and micropore is about 5A °, and adsorption-desorption speed is under some influence, and adsorption capacity also is restricted.13X type molecular sieve is 20% owing to containing binding agent, though micropore is bigger, is 8-9A °, and adsorption capacity is less, and secondary pore distributes undesirable, also has influence on adsorption-desorption speed.
Novel binder free 13X (NaX) molecular sieve adopts binding agent (halloysite, attapulgite) through chemical reaction, and it is 13X (NaX) molecular sieve that crystallization is changeed crystalline substance, and adsorption capacity is increased, and changes the secondary pore distributed architecture, thereby has improved adsorption-desorption speed.
Summary of the invention
The purpose of this invention is to provide a kind ofly have big adsorption capacity, the novel binder free 13X hydrogen manufacturing of adsorption-desorption speed preferably is dedicated molecular sieve used.
The present invention adopts following technical scheme to achieve these goals:
The preparation method of binder free 13X molecular sieve is characterized in that comprising the steps:
(1) 85-90 weight portion 13X molecular screen primary powder mixes with 10-15 weight portion clay, adds 2-10 weight portion additive, granulation in comminutor, and the rotating speed of comminutor is 30-60 rev/min;
(2) with graininess intermediate product after the granulation, require to sieve according to product granularity, oven dry is after 350 ℃ of-800 ℃ of high-temperature roastings;
(3) intermediate product after the roasting immerses in the sodium silicate solution that contains 5-15% sodium oxide molybdena and 2-10% silica and reacts; Reaction temperature is 80-100 ℃; Reaction time is 4-16 hour; After washing, the oven dry granular disintegration is carried out the high-temperature roasting second time at 200-800 ℃, get binder free 13X zeolite product.
Described binder free 13X molecular sieve preparation method is characterized in that: described clay is halloysite class clay and attapulgite class clay.
Described binder free 13X molecular sieve preparation method, it is characterized in that: described additive is selected from one or more in carboxymethyl cellulose, the tannin extract.
Described binder free 13X molecular sieve preparation method is characterized in that: NaOH, sodium metasilicate mixed liquor volume and intermediate product weight ratio are 2-8 described in the step (3): 1.
Described binder free 13X molecular sieve preparation method is characterized in that: the particle diameter of the binder free 13X zeolite product that makes is 0.30-2.5mm..
Beneficial effect of the present invention:
Binder free 13X molecular sieve effective adsorption capacity of the present invention, the rate of adsorption, desorption rate, mechanical strength all are superior to common 13X molecular sieve, are used for transformation absorption hydrogen manufacturing, also can be used for the aspects such as adsorbing separation of transformation system oxygen, gas-liquid.
The specific embodiment
Embodiment 1: the preparation method of binder free 13X molecular sieve comprises the steps:
85 parts of former powder of 13X mix with 10 parts of halloysites, 5 parts of attapulgites, add 2 parts of carboxymethyl celluloses (CMC), 2 parts of tannin extracts; In comminutor granulation 45-60 minute, through sieve the intermediate product of ￠ 0.3-0.65mm, oven dry is after 700 ℃ of roastings; Product after the roasting immerses in the mixed solution of NaOH and sodium metasilicate of 8% NaOH, 4% silica under 90-94 ℃; Reacted 8 hours, 550 ℃ of following roastings again after the washing and drying, the product that obtains is measured its H with the BET method
2O and CO
2Adsorbance, in the time of 25 ℃, relative humidity is 50% o'clock H
2The O adsorbance is 30.12%, CO during the 250mmHg post
2Adsorbance is 21.08%.
Embodiment 2: the preparation method of binder free 13X molecular sieve comprises the steps:
85 parts of former powder of 13X mix with 12 parts of halloysites, 5 parts of attapulgites, add 2 parts of carboxymethyl celluloses (CMC), 2 parts of tannin extracts; In comminutor granulation 60-80 minute, through sieve the intermediate product of ￠ 1.6-2.5mm, oven dry is after 700 ℃ of roastings; Product after the roasting immerses in the mixed solution of NaOH and sodium metasilicate of 8% NaOH, 4% silica under 90-94 ℃; Reacted 16 hours, 550 ℃ of following roastings again after the washing and drying, the product that obtains is measured its H with the BET method
2O and CO
2Adsorbance, in the time of 25 ℃, relative humidity is 50% o'clock H
2The O adsorbance is 29.93%, CO during the 250mmHg post
2Adsorbance is 20.85%.
Embodiment 3: the preparation method of binder free 13X molecular sieve comprises the steps:
85 parts of former powder of 13X mix with 9 parts of halloysites, 3 parts of attapulgites, add 1.5 parts of carboxymethyl celluloses (CMC), 1.5 parts of tannin extracts; In comminutor granulation 45-60 minute, through sieve the intermediate product of ￠ 0.3-0.65mm, oven dry is after 650 ℃ of roastings; Product after the roasting immerses in the mixed solution of NaOH and sodium metasilicate of 7% NaOH, 3% silica under 90-94 ℃; Reacted 8 hours, 550 ℃ of following roastings again after the washing and drying, the product that obtains is measured its H with the BET method
2O and CO
2Adsorbance, in the time of 25 ℃, relative humidity is 50% o'clock H
2The O adsorbance is 30.34%, CO during the 250mmHg post
2Adsorbance is 21.37%.
Embodiment 4: the preparation method of binder free 13X molecular sieve comprises the steps:
85 parts of former powder of 13X mix with 9 parts of halloysites, 3 parts of attapulgites, add 1.5 parts of carboxymethyl celluloses (CMC), 1.5 parts of tannin extracts; In comminutor granulation 60-80 minute, through sieve the intermediate product of ￠ 1.6-2.5mm, oven dry is after 650 ℃ of roastings; Product after the roasting immerses in the mixed solution of NaOH and sodium metasilicate of 7% NaOH, 3% silica under 90-94 ℃; Reacted 14 hours, 550 ℃ of following roastings again after the washing and drying, the product that obtains is measured its H with the BET method
2O and CO
2Adsorbance, in the time of 25 ℃, relative humidity is 50% o'clock H
2The O adsorbance is 30.09%, CO during the 250mmHg post
2Adsorbance is 21.12%.
Embodiment 5: the preparation method of binder free 13X molecular sieve comprises the steps:
90 parts of former powder of 13X mix with 8 parts of halloysites, 2 parts of attapulgites, add 1.5 parts of carboxymethyl celluloses (CMC), 1.5 parts of tannin extracts; In comminutor granulation 45-60 minute, through sieve the intermediate product of ￠ 0.3-0.65mm, oven dry is after 700 ℃ of roastings; Product after the roasting immerses in the mixed solution of NaOH and sodium metasilicate of 6% NaOH, 2.75% silica under 90-94 ℃; Reacted 6 hours, 550 ℃ of following roastings again after the washing and drying, the product that obtains is measured its H with the BET method
2O and CO
2Adsorbance, in the time of 25 ℃, relative humidity is 50% o'clock H
2The O adsorbance is 30.85%, CO during the 250mmHg post
2Adsorbance is 21.56%.
Embodiment 6: the preparation method of binder free 13X molecular sieve comprises the steps:
90 parts of former powder of 13X mix with 8 parts of halloysites, 2 parts of attapulgites, add 1.5 parts of carboxymethyl celluloses (CMC), 1.5 parts of tannin extracts; In comminutor granulation 60-80 minute, through sieve the intermediate product of ￠ 1.6-2.5mm, oven dry is after 700 ℃ of roastings; Product after the roasting immerses in the mixed solution of NaOH and sodium metasilicate of 6% NaOH, 2.75% silica under 90-94 ℃; Reacted 12 hours, 550 ℃ of following roastings again after the washing and drying, the product that obtains is measured its H with the BET method
2O and CO
2Adsorbance, in the time of 25 ℃, relative humidity is that 50% o'clock H2O adsorbance is 30.61%, CO during the 250mmHg post
2Adsorbance is 21.30%.
Claims (5)
1. the preparation method of a binder free 13X molecular sieve is characterized in that comprising the steps:
(1) 85-90 weight portion 13X molecular screen primary powder mixes with 10-15 weight portion clay, adds 2-10 weight portion additive, granulation in comminutor, and the rotating speed of comminutor is 30-60 rev/min;
(2) with graininess intermediate product after the granulation, require to sieve according to product granularity, oven dry is after 350 ℃ of-800 ℃ of high-temperature roastings;
(3) intermediate product after the roasting immerses in the sodium silicate solution that contains 5-15% sodium oxide molybdena and 2-10% silica and reacts; Reaction temperature is 80-100 ℃; Reaction time is 4-16 hour; After washing, the oven dry granular disintegration is carried out the high-temperature roasting second time at 200-800 ℃, get binder free 13X zeolite product.
2. binder free 13X molecular sieve preparation method according to claim 1 is characterized in that: described clay is halloysite class clay and attapulgite class clay.
3. binder free 13X molecular sieve preparation method according to claim 1, it is characterized in that: described additive is selected from one or more in carboxymethyl cellulose, the tannin extract.
4. binder free 13X molecular sieve preparation method according to claim 1 is characterized in that: NaOH, sodium metasilicate mixed liquor volume and intermediate product weight ratio are 2-8 described in the step (3): 1.
5. binder free 13X molecular sieve preparation method according to claim 1 is characterized in that: the particle diameter of the binder free 13X zeolite product that makes is 0.30-2.5mm..
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104190798A CN102513059A (en) | 2011-12-15 | 2011-12-15 | Method for preparing 13X molecular sieve free of binder |
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| CN2011104190798A CN102513059A (en) | 2011-12-15 | 2011-12-15 | Method for preparing 13X molecular sieve free of binder |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624017A (en) * | 2015-01-23 | 2015-05-20 | 四川省达科特能源科技股份有限公司 | Method for recovering light hydrocarbons from natural gas and oilfield associated gas |
| CN105148835A (en) * | 2015-10-27 | 2015-12-16 | 武汉科技大学 | Particle-type 13X molecule sieve/attapulgite-loaded nanometer iron-nickel material and preparation method thereof |
| CN105749699A (en) * | 2016-03-31 | 2016-07-13 | 四川天采科技有限责任公司 | Full-temperature-range pressure swing adsorption gas separation, refinement and purification method |
| CN106040166A (en) * | 2016-06-23 | 2016-10-26 | 江西科帕克环保化工有限责任公司 | Preparation method of air separation molecular sieve capable of efficiently desorbing |
| CN107159105A (en) * | 2017-07-07 | 2017-09-15 | 洛阳建龙微纳新材料股份有限公司 | Binder-free 13X molecular sieve adsorbent and preparation method thereof |
| CN107262025A (en) * | 2016-04-08 | 2017-10-20 | 正大能源材料(大连)有限公司 | A kind of preparation method of space division adsorbent of molecular sieve |
| CN107365039A (en) * | 2017-08-10 | 2017-11-21 | 芜湖市三山区绿色食品产业协会 | The targeting minimizing technology of heavy metal in a kind of feces of livestock and poultry |
| CN107376835A (en) * | 2017-08-18 | 2017-11-24 | 洛阳建龙微纳新材料股份有限公司 | A kind of efficient hydrogen production adsorbent and preparation method thereof |
| CN109351326A (en) * | 2018-12-19 | 2019-02-19 | 四川省达科特能源科技股份有限公司 | A kind of renewable mercury removal agent and preparation method thereof for natural gas |
| CN109647329A (en) * | 2019-01-29 | 2019-04-19 | 大连理工大学盘锦产业技术研究院 | A kind of binder free composite molecular screen preparation method and its application in oil product absorption desulfurization |
| CN110026151A (en) * | 2019-04-29 | 2019-07-19 | 中国地质科学院郑州矿产综合利用研究所 | Method for improving adsorption capacity and strength of binderless nalsx molecular sieve |
| CN111167404A (en) * | 2020-01-10 | 2020-05-19 | 上海航中实业有限公司 | Molecular sieve of commercial vehicle brake system and preparation method thereof |
| CN112408415A (en) * | 2020-10-30 | 2021-02-26 | 上海绿强新材料有限公司 | Granular low-silicon 13X molecular sieve and preparation method and application thereof |
| CN115818660A (en) * | 2022-12-23 | 2023-03-21 | 中科催化新技术(大连)股份有限公司 | A kind of preparation method of binder-free 4A molecular sieve |
| CN116078346A (en) * | 2022-12-23 | 2023-05-09 | 中科催化新技术(大连)股份有限公司 | Preparation method of X-type molecular sieve and A-type molecular sieve composite adsorbent |
| CN116196890A (en) * | 2021-11-30 | 2023-06-02 | 安徽昊源化工集团有限公司 | A kind of pressure swing adsorption hydrogen extraction adsorbent for synthesizing morpholine and preparation method thereof |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624017A (en) * | 2015-01-23 | 2015-05-20 | 四川省达科特能源科技股份有限公司 | Method for recovering light hydrocarbons from natural gas and oilfield associated gas |
| CN105148835A (en) * | 2015-10-27 | 2015-12-16 | 武汉科技大学 | Particle-type 13X molecule sieve/attapulgite-loaded nanometer iron-nickel material and preparation method thereof |
| CN105749699A (en) * | 2016-03-31 | 2016-07-13 | 四川天采科技有限责任公司 | Full-temperature-range pressure swing adsorption gas separation, refinement and purification method |
| CN107262025A (en) * | 2016-04-08 | 2017-10-20 | 正大能源材料(大连)有限公司 | A kind of preparation method of space division adsorbent of molecular sieve |
| CN106040166A (en) * | 2016-06-23 | 2016-10-26 | 江西科帕克环保化工有限责任公司 | Preparation method of air separation molecular sieve capable of efficiently desorbing |
| CN107159105A (en) * | 2017-07-07 | 2017-09-15 | 洛阳建龙微纳新材料股份有限公司 | Binder-free 13X molecular sieve adsorbent and preparation method thereof |
| CN107365039A (en) * | 2017-08-10 | 2017-11-21 | 芜湖市三山区绿色食品产业协会 | The targeting minimizing technology of heavy metal in a kind of feces of livestock and poultry |
| CN107376835A (en) * | 2017-08-18 | 2017-11-24 | 洛阳建龙微纳新材料股份有限公司 | A kind of efficient hydrogen production adsorbent and preparation method thereof |
| CN109351326A (en) * | 2018-12-19 | 2019-02-19 | 四川省达科特能源科技股份有限公司 | A kind of renewable mercury removal agent and preparation method thereof for natural gas |
| CN109647329A (en) * | 2019-01-29 | 2019-04-19 | 大连理工大学盘锦产业技术研究院 | A kind of binder free composite molecular screen preparation method and its application in oil product absorption desulfurization |
| CN110026151A (en) * | 2019-04-29 | 2019-07-19 | 中国地质科学院郑州矿产综合利用研究所 | Method for improving adsorption capacity and strength of binderless nalsx molecular sieve |
| CN110026151B (en) * | 2019-04-29 | 2021-11-26 | 中国地质科学院郑州矿产综合利用研究所 | Method for improving adsorption capacity and strength of binderless nalsx molecular sieve |
| CN111167404A (en) * | 2020-01-10 | 2020-05-19 | 上海航中实业有限公司 | Molecular sieve of commercial vehicle brake system and preparation method thereof |
| CN112408415A (en) * | 2020-10-30 | 2021-02-26 | 上海绿强新材料有限公司 | Granular low-silicon 13X molecular sieve and preparation method and application thereof |
| CN116196890A (en) * | 2021-11-30 | 2023-06-02 | 安徽昊源化工集团有限公司 | A kind of pressure swing adsorption hydrogen extraction adsorbent for synthesizing morpholine and preparation method thereof |
| CN116196890B (en) * | 2021-11-30 | 2025-05-30 | 安徽昊源化工集团有限公司 | Pressure swing adsorption hydrogen extraction adsorbent for synthesizing morpholine and preparation method thereof |
| CN115818660A (en) * | 2022-12-23 | 2023-03-21 | 中科催化新技术(大连)股份有限公司 | A kind of preparation method of binder-free 4A molecular sieve |
| CN116078346A (en) * | 2022-12-23 | 2023-05-09 | 中科催化新技术(大连)股份有限公司 | Preparation method of X-type molecular sieve and A-type molecular sieve composite adsorbent |
| CN116078346B (en) * | 2022-12-23 | 2024-10-11 | 中科催化新技术(大连)股份有限公司 | Preparation method of X-type molecular sieve and A-type molecular sieve composite adsorbent |
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Application publication date: 20120627 |