CN105692647A - Preparation method of SSZ-13 molecular sieve - Google Patents
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- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/04—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof using at least one organic template directing agent, e.g. an ionic quaternary ammonium compound or an aminated compound
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Abstract
The invention discloses a preparation method of an SSZ-13 molecular sieve. According to the method, by adopting the supplement crystallization technology and taking the measures of adding an organic amine crystallization accelerant and seed crystals and the like, the utilization rate of synthesis raw materials is increased, the crystallization induction period is effectively shortened, the synthesis time of the molecular sieve is shortened, and the integrity of molecular sieve crystals is improved. Triethylamine or pyridine and N,N,N-trimethyl-1-adamantyl ammonium hydroxide are used for forming a mixed template agent, expensive N,N,N-trimethyl-1-adamantyl ammonium hydroxide is replaced with triethylamine or pyridine, and thus the synthesis cost of the SSZ-13 molecular sieve is greatly reduced. According to the preferred scheme, sodium tripolyphosphate and guar gum are adopted as flocculant to treat wastewater in filter liquor so as to settle silico-aluminum compounds and the template agent contained in mother liquor, obtained recycled water can be used in production or directly discharged, and thus environmental pollution caused when filter liquor is directly discharged and consequently the chemical oxygen demand (COD) and ammonia-nitrogen compounds of wastewater exceed the standard is avoided.
Description
Technical field
The present invention relates to technical field of molecular sieve, the preparation method being specifically related to a kind of SSZ-13 molecular sieve。
Background technology
SSZ-13 molecular sieve has a superior selective catalysis performance at petrochemical industries such as air purifying preparation, auto-exhaust catalyst, alkene aromatisation and olefin hydrocarbon making by coals, but current preparation technology manufacturing cost is higher, yield is low, synthesis technique is complicated limits it and widely use；Template N owing to using in the preparation process of SSZ-13 molecular sieve on the one hand, N, N-trimethyl-1-adamantyl ammonium hydroxide is expensive, on the other hand, useful constituent in crystallization mother liquor is not effectively utilized, building-up process needs add excessive silicon source, aluminum source and organic formwork agent, to promote the realization of crystallization process, therefore containing substantial amounts of silicoaluminate and template in the filtrated stock after crystallization terminates, this dirty underwater drainage can cause chemical oxygen consumption of sewage COD and ammonia nitriding compound severe overweight。
Summary of the invention
For solving the problems referred to above, the preparation method that it is an object of the invention to provide a kind of SSZ-13 molecular sieve。
The present invention for achieving the above object, is achieved through the following technical solutions:
The preparation method of a kind of SSZ-13 molecular sieve, comprises the steps:
1. in autoclave, it is sequentially added in water by silicon source, aluminum source, sodium hydroxide and the first template mix homogeneously, obtains mixed liquor, in mixed liquor, add SSZ-13 molecular sieve and organic amine accelerator mix homogeneously obtains reactant liquor；The first described template is N, N, N-trimethyl-1-adamantyl ammonium hydroxide, and described organic amine accelerator is cetyl trimethylammonium bromide, H in described reactant liquor2O:Na2O:Al2O3:SiO2: the mol ratio of the first template is 15 ~ 30:0.1 ~ 0.3:0.02 ~ 0.04:1:0.05 ~ 0.08；The mass ratio of described SSZ-13 molecular sieve, cetyl trimethylammonium bromide and mixed liquor is 1:2 ~ 3:280 ~ 320；
2. reactant liquor is warming up to 115 ~ 125 DEG C under agitation react 9 ~ 10 hours, then heats to 155 ~ 165 DEG C and react 35 ~ 45 hours, be then added thereto to the second template and continue stirring reaction 45 ~ 50 hours, obtain crystallization product；The second described template is triethylamine or pyridine；The mol ratio of the second template and the first template is 1:2 ~ 4；
3. step 2. gained crystallization product is performing centrifugal separation on, obtain filtrate and filter cake, by gained filter cake through washing, dry obtain SSZ-13 molecular screen primary powder, be placed in 500 ~ 600 DEG C of Muffle furnaces by gained SSZ-13 molecular screen primary powder roasting 4 ~ 6 hours, obtain SSZ-13 molecular sieve。
For realizing the purpose of the present invention further, it is also possible to by the following technical solutions:
Preferably, silicon source is silica gel, Ludox or aerosil；Aluminum source is aluminum sulfate or aluminium hydroxide。
Preferably, the second template is triethylamine。
Preferably, add sodium tripolyphosphate and guar gum to step 3. gained filtrate, obtain mixed liquor, by mixed liquor standing sedimentation 10 ~ 12 hours, isolated by filtration, be precipitated and recirculated water；The mass ratio of described filtrate, sodium tripolyphosphate and guar gum is 190 ~ 210:1:2 ~ 3。
It is preferred that the preparation method of SSZ-13 molecular sieve, comprise the steps:
1. in autoclave, it is sequentially added in water by silica gel, aluminum sulfate, sodium hydroxide and the first template mix homogeneously, obtains mixed liquor, in mixed liquor, add SSZ-13 molecular sieve and organic amine accelerator mix homogeneously obtains reactant liquor；The first described template is N, N, N-trimethyl-1-adamantyl ammonium hydroxide, and described organic amine accelerator is cetyl trimethylammonium bromide, H in described reactant liquor2O:Na2O:Al2O3:SiO2: the mol ratio of the first template is 25:0.2:0.03:1:0.06；The mass ratio of described SSZ-13 molecular sieve, cetyl trimethylammonium bromide and mixed liquor is 1:3:280；
2. reactant liquor is warming up to 120 DEG C of under agitation reaction 9 hours, then heats to 160 DEG C and react 40 hours, be then added thereto to the second template and continue stirring reaction 48 hours, obtain crystallization product；The second described template is triethylamine；The mol ratio of the second template and the first template is 1:3；
3. step 2. gained crystallization product is performing centrifugal separation on, obtains filtrate and filter cake, by gained filter cake through washing, dry obtain SSZ-13 molecular screen primary powder, be placed in 550 DEG C of Muffle furnaces by gained SSZ-13 molecular screen primary powder roasting 5 hours, obtain SSZ-13 molecular sieve。
It is an advantage of the current invention that:
Present invention uses double template, cheap triethylamine or pyridine is used to replace N, N, N-trimethyl-1-adamantyl ammonium hydroxide, greatly reducing the synthesis cost of molecular sieve, and the second template triethylamine or pyridine are to add in the crystallization later stage, now the first template major part is in the duct of established SSZ-13 molecular sieve, template concentration in crystallization system is relatively low, and crystallization motive force dies down。Now, adding the second template, may proceed to keep crystallization motive force, silicon superfluous in system and aluminum can assemble further, and modify the segmental defect of the crystal generated, thus, relative crystallinity improves, and raw silicon is also relative with the utilization rate of aluminum to be improved；The present invention adds isostructural molecular sieve as crystal seed in the synthetic system of molecular sieve, and with the addition of quaternary ammonium salt organic amine accelerator, both additions add the dissolubility of organic formwork agent in Primogel, improve crystallization rate, shorten crystallization induction period, significantly improve combined coefficient, save synthesis cost；Preferred embodiments of the present invention adopt sodium tripolyphosphate and guar gum to process the waste water in filtrate as flocculant, the silicoaluminate contained in mother solution and template are settled, gained recirculated water can be used for producing or directly discharging, it is to avoid filtrate directly lower row causes that chemical oxygen consumption of sewage COD and ammonia nitriding compound exceed standard the environmental pollution caused。
Detailed description of the invention
The preparation method of a kind of SSZ-13 molecular sieve, comprises the steps:
1. in autoclave, it is sequentially added in water by silicon source, aluminum source, sodium hydroxide and the first template mix homogeneously, obtains mixed liquor, in mixed liquor, add SSZ-13 molecular sieve and organic amine accelerator mix homogeneously obtains reactant liquor；The first described template is N, N, N-trimethyl-1-adamantyl ammonium hydroxide, and described organic amine accelerator is cetyl trimethylammonium bromide, H in described reactant liquor2O:Na2O:Al2O3:SiO2: the mol ratio of the first template is 15 ~ 30:0.1 ~ 0.3:0.02 ~ 0.04:1:0.05 ~ 0.08；The mass ratio of described SSZ-13 molecular sieve, cetyl trimethylammonium bromide and mixed liquor is 1:2 ~ 3:280 ~ 320；
2. reactant liquor is warming up to 115 ~ 125 DEG C under agitation react 9 ~ 10 hours, then heats to 155 ~ 165 DEG C and react 35 ~ 45 hours, be then added thereto to the second template and continue stirring reaction 45 ~ 50 hours, obtain crystallization product；The second described template is triethylamine or pyridine；The mol ratio of the second template and the first template is 1:2 ~ 4；
3. step 2. gained crystallization product is performing centrifugal separation on, obtain filtrate and filter cake, by gained filter cake through washing, dry obtain SSZ-13 molecular screen primary powder, be placed in 500 ~ 600 DEG C of Muffle furnaces by gained SSZ-13 molecular screen primary powder roasting 4 ~ 6 hours, obtain SSZ-13 molecular sieve。
For realizing the purpose of the present invention further, it is also possible to by the following technical solutions:
Preferably, silicon source is silica gel, Ludox or aerosil；Aluminum source is aluminum sulfate or aluminium hydroxide。
Preferably, the second template is triethylamine。
Preferably, add sodium tripolyphosphate and guar gum to step 3. gained filtrate, obtain mixed liquor, by mixed liquor standing sedimentation 10 ~ 12 hours, isolated by filtration, be precipitated and recirculated water；The mass ratio of described filtrate, sodium tripolyphosphate and guar gum is 190 ~ 210:1:2 ~ 3。
It is preferred that the preparation method of SSZ-13 molecular sieve, comprise the steps:
1. in autoclave, it is sequentially added in water by silica gel, aluminum sulfate, sodium hydroxide and the first template mix homogeneously, obtains mixed liquor, in mixed liquor, add SSZ-13 molecular sieve and organic amine accelerator mix homogeneously obtains reactant liquor；The first described template is N, N, N-trimethyl-1-adamantyl ammonium hydroxide, and described organic amine accelerator is cetyl trimethylammonium bromide, H in described reactant liquor2O:Na2O:Al2O3:SiO2: the mol ratio of the first template is 25:0.2:0.03:1:0.06；The mass ratio of described SSZ-13 molecular sieve, cetyl trimethylammonium bromide and mixed liquor is 1:3:280；
2. reactant liquor is warming up to 120 DEG C of under agitation reaction 9 hours, then heats to 160 DEG C and react 40 hours, be then added thereto to the second template and continue stirring reaction 48 hours, obtain crystallization product；The second described template is triethylamine；The mol ratio of the second template and the first template is 1:3；
3. step 2. gained crystallization product is performing centrifugal separation on, obtains filtrate and filter cake, by gained filter cake through washing, dry obtain SSZ-13 molecular screen primary powder, be placed in 550 DEG C of Muffle furnaces by gained SSZ-13 molecular screen primary powder roasting 5 hours, obtain SSZ-13 molecular sieve。
Embodiment 1
The preparation method of a kind of SSZ-13 molecular sieve, comprises the steps:
1. in autoclave, 60kg Ludox, 6.84kg aluminum sulfate, 8kg sodium hydroxide, 10.55kg the first template are sequentially added into mix homogeneously in 270kg water, obtain mixed liquor, in mixed liquor, add 1.27kgSSZ-13 molecular sieve and 2.54kg organic amine accelerator mix homogeneously obtains reactant liquor；The first described template is N, N, N-trimethyl-1-adamantyl ammonium hydroxide, and described organic amine accelerator is cetyl trimethylammonium bromide；
2. reactant liquor is warming up to 115 DEG C of under agitation reaction 9 hours, then heats to 155 DEG C and react 35 ~ 45 hours, be then added thereto to 2.53kg the second template triethylamine and continue stirring reaction 45 hours, obtain crystallization product；
3. step 2. gained crystallization product is performing centrifugal separation on, obtains filtrate and filter cake, by gained filter cake through washing, dry obtain SSZ-13 molecular screen primary powder, be placed in 500 DEG C of Muffle furnaces by gained SSZ-13 molecular screen primary powder roasting 4 hours, obtain SSZ-13 molecular sieve。
Embodiment 2
The preparation method of a kind of SSZ-13 molecular sieve, comprises the steps:
1. in autoclave, 60kg silica gel, 6.24kg aluminium hydroxide, 24kg sodium hydroxide and 16.88kg the first template are sequentially added into mix homogeneously in 540kg water, obtain mixed liquor, in mixed liquor, add 2.02kgSSZ-13 molecular sieve and 6.06kg organic amine accelerator mix homogeneously obtains reactant liquor；The first described template is N, N, N-trimethyl-1-adamantyl ammonium hydroxide, and described organic amine accelerator is cetyl trimethylammonium bromide；
2. reactant liquor is warming up to 125 DEG C of under agitation reaction 10 hours, then heats to 165 DEG C and react 45 hours, be then added thereto to 1.58kg the second template and continue stirring reaction 50 hours, obtain crystallization product；The second described template is pyridine；
3. step 2. gained crystallization product is performing centrifugal separation on, obtains filtrate and filter cake, by gained filter cake through washing, dry obtain SSZ-13 molecular screen primary powder, be placed in 600 DEG C of Muffle furnaces by gained SSZ-13 molecular screen primary powder roasting 6 hours, obtain SSZ-13 molecular sieve。
Embodiment 3
The preparation method of a kind of SSZ-13 molecular sieve, comprises the steps:
1. in autoclave, 60kg aerosil, 4.68kg aluminium hydroxide, 16kg sodium hydroxide and 12.66kg the first template are sequentially added into mix homogeneously in 360kg water, obtain mixed liquor, in mixed liquor, add 1.51kgSSZ-13 molecular sieve and 3.78kg organic amine accelerator mix homogeneously obtains reactant liquor；The first described template is N, N, N-trimethyl-1-adamantyl ammonium hydroxide, and described organic amine accelerator is cetyl trimethylammonium bromide；
2. reactant liquor is warming up to 120 DEG C of under agitation reaction 9.5 hours, then heats to 160 DEG C and react 40 hours, be then added thereto to 2.02kg the second template and continue stirring reaction 48 hours, obtain crystallization product；The second described template is triethylamine；
3. step 2. gained crystallization product is performing centrifugal separation on, obtains filtrate and filter cake, by gained filter cake through washing, dry obtain SSZ-13 molecular screen primary powder, be placed in 580 DEG C of Muffle furnaces by gained SSZ-13 molecular screen primary powder roasting 5 hours, obtain SSZ-13 molecular sieve；
4. adding 1.81kg sodium tripolyphosphate and 3.63kg guar gum in step 3. gained 345kg filtrate, obtain mixed liquor, by mixed liquor standing sedimentation 10 hours, isolated by filtration, be precipitated and recirculated water, gained recirculated water can be directly used for the production of SSZ-13 molecular sieve。
Embodiment 4
The preparation method of a kind of SSZ-13 molecular sieve, comprises the steps:
1. in autoclave, 60kg silica gel, 10.26kg aluminum sulfate, 16kg sodium hydroxide and 12.66kg the first template are sequentially added into mix homogeneously in 450kg water, obtain mixed liquor, in mixed liquor, add 1.96kgSSZ-13 molecular sieve and 5.88kg organic amine accelerator mix homogeneously obtains reactant liquor；The first described template is N, N, N-trimethyl-1-adamantyl ammonium hydroxide, and described organic amine accelerator is cetyl trimethylammonium bromide；
2. reactant liquor is warming up to 120 DEG C of under agitation reaction 9 hours, then heats to 160 DEG C and react 40 hours, be then added thereto to 2.02kg the second template and continue stirring reaction 48 hours, obtain crystallization product；The second described template is triethylamine；
3. step 2. gained crystallization product is performing centrifugal separation on, obtains filtrate and filter cake, by gained filter cake through washing, dry obtain SSZ-13 molecular screen primary powder, be placed in 550 DEG C of Muffle furnaces by gained SSZ-13 molecular screen primary powder roasting 5 hours, obtain SSZ-13 molecular sieve。
The detection data of embodiment 1 ~ 4 gained SSZ-13 molecular sieve are as shown in table 1。
The detection tables of data of table 1 embodiment 1 ~ 4 gained SSZ-13 molecular sieve
| Relative crystallinity/% | Total specific surface area/m2/g | |
| Embodiment 1 | 105 | 565 |
| Embodiment 2 | 98 | 570 |
| Embodiment 3 | 99 | 576 |
| Embodiment 4 | 100 | 582 |
Claims (5)
1. the preparation method of a SSZ-13 molecular sieve, it is characterised in that: comprise the steps:
1. in autoclave, it is sequentially added in water by silicon source, aluminum source, sodium hydroxide and the first template mix homogeneously, obtains mixed liquor, in mixed liquor, add SSZ-13 molecular sieve and organic amine accelerator mix homogeneously obtains reactant liquor；The first described template is N, N, N-trimethyl-1-adamantyl ammonium hydroxide, and described organic amine accelerator is cetyl trimethylammonium bromide, H in described reactant liquor2O:Na2O:Al2O3:SiO2: the mol ratio of the first template is 15 ~ 30:0.1 ~ 0.3:0.02 ~ 0.04:1:0.05 ~ 0.08；The mass ratio of described SSZ-13 molecular sieve, cetyl trimethylammonium bromide and mixed liquor is 1:2 ~ 3:280 ~ 320；
2. reactant liquor is warming up to 115 ~ 125 DEG C under agitation react 9 ~ 10 hours, then heats to 155 ~ 165 DEG C and react 35 ~ 45 hours, be then added thereto to the second template and continue stirring reaction 45 ~ 50 hours, obtain crystallization product；The second described template is triethylamine or pyridine；The mol ratio of the second template and the first template is 1:2 ~ 4；
3. step 2. gained crystallization product is performing centrifugal separation on, obtain filtrate and filter cake, by gained filter cake through washing, dry obtain SSZ-13 molecular screen primary powder, be placed in 500 ~ 600 DEG C of Muffle furnaces by gained SSZ-13 molecular screen primary powder roasting 4 ~ 6 hours, obtain SSZ-13 molecular sieve。
2. the preparation method of a kind of SSZ-13 molecular sieve according to claim 1, it is characterised in that: silicon source is silica gel, Ludox or aerosil；Aluminum source is aluminum sulfate or aluminium hydroxide。
3. the preparation method of a kind of SSZ-13 molecular sieve according to claim 1, it is characterised in that: the second template is triethylamine。
4. the preparation method of a kind of SSZ-13 molecular sieve according to claim 1, it is characterized in that: add sodium tripolyphosphate and guar gum to step 3. gained filtrate, obtain mixed liquor, by mixed liquor standing sedimentation 10 ~ 12 hours, isolated by filtration, is precipitated and recirculated water；The mass ratio of described filtrate, sodium tripolyphosphate and guar gum is 190 ~ 210:1:2 ~ 3。
5. the preparation method of a SSZ-13 molecular sieve, it is characterised in that: comprise the steps:
1. in autoclave, it is sequentially added in water by silica gel, aluminum sulfate, sodium hydroxide and the first template mix homogeneously, obtains mixed liquor, in mixed liquor, add SSZ-13 molecular sieve and organic amine accelerator mix homogeneously obtains reactant liquor；The first described template is N, N, N-trimethyl-1-adamantyl ammonium hydroxide, and described organic amine accelerator is cetyl trimethylammonium bromide, H in described reactant liquor2O:Na2O:Al2O3:SiO2: the mol ratio of the first template is 25:0.2:0.03:1:0.06；The mass ratio of described SSZ-13 molecular sieve, cetyl trimethylammonium bromide and mixed liquor is 1:3:280；
2. reactant liquor is warming up to 120 DEG C of under agitation reaction 9 hours, then heats to 160 DEG C and react 40 hours, be then added thereto to the second template and continue stirring reaction 48 hours, obtain crystallization product；The second described template is triethylamine；The mol ratio of the second template and the first template is 1:3；
3. step 2. gained crystallization product is performing centrifugal separation on, obtains filtrate and filter cake, by gained filter cake through washing, dry obtain SSZ-13 molecular screen primary powder, be placed in 550 DEG C of Muffle furnaces by gained SSZ-13 molecular screen primary powder roasting 5 hours, obtain SSZ-13 molecular sieve。
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106276953A (en) * | 2016-08-26 | 2017-01-04 | 天津南化催化剂有限公司 | A kind of preparation method of SSZ 13 molecular sieve |
| CN106334577A (en) * | 2016-09-29 | 2017-01-18 | 南昌大学 | Preparation method of Mo modified Cu-SSZ-13 catalyst |
| CN106587097A (en) * | 2016-12-26 | 2017-04-26 | 中国地质大学（武汉） | Method for synthesizing SSZ-13 zeolite molecular sieve by utilizing micron-silicon powder |
| CN106629761A (en) * | 2016-12-20 | 2017-05-10 | 上海卓悦化工科技有限公司 | Synthesis method of SSZ-13 molecular sieve |
| CN107627422A (en) * | 2017-11-01 | 2018-01-26 | 徐州得铸生物科技有限公司 | A kind of garden landscape wood of resistance to deformation |
| CN108059172A (en) * | 2017-12-13 | 2018-05-22 | 山东齐鲁华信高科有限公司 | The preparation method of H-SSZ-13 molecular sieves |
| CN108529642A (en) * | 2018-05-24 | 2018-09-14 | 山东泓泰恒瑞新材料有限公司 | A kind of preparation method of Cu-SSZ-13 molecular sieves |
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| CN109534354A (en) * | 2018-11-12 | 2019-03-29 | 山东国瓷功能材料股份有限公司 | A kind of synthetic method of SSZ-13 molecular sieve |
| CN109569320A (en) * | 2018-12-26 | 2019-04-05 | 韩小学 | A method of mixing crystal seed method prepares pure phase SSZ-13 molecular screen membrane |
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| CN110156610A (en) * | 2019-05-22 | 2019-08-23 | 无锡威孚环保催化剂有限公司 | A method of recycling template from SSZ-13 Zeolite synthesis waste liquid |
| CN110357121A (en) * | 2019-08-02 | 2019-10-22 | 太原理工大学 | A kind of preparation method of little crystal grain nanometer hierarchical pore SSZ-13 molecular sieve |
| CN112939020A (en) * | 2021-04-09 | 2021-06-11 | 南京诚志清洁能源有限公司 | Stepped crystallization preparation method and application of Cu-SSZ-13 molecular sieve catalyst |
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| CN106276953A (en) * | 2016-08-26 | 2017-01-04 | 天津南化催化剂有限公司 | A kind of preparation method of SSZ 13 molecular sieve |
| CN106334577A (en) * | 2016-09-29 | 2017-01-18 | 南昌大学 | Preparation method of Mo modified Cu-SSZ-13 catalyst |
| CN106629761A (en) * | 2016-12-20 | 2017-05-10 | 上海卓悦化工科技有限公司 | Synthesis method of SSZ-13 molecular sieve |
| CN106629761B (en) * | 2016-12-20 | 2017-11-24 | 上海卓悦化工科技有限公司 | A kind of synthetic method of the molecular sieves of SSZ 13 |
| CN106587097A (en) * | 2016-12-26 | 2017-04-26 | 中国地质大学（武汉） | Method for synthesizing SSZ-13 zeolite molecular sieve by utilizing micron-silicon powder |
| CN107627422A (en) * | 2017-11-01 | 2018-01-26 | 徐州得铸生物科技有限公司 | A kind of garden landscape wood of resistance to deformation |
| CN108059172B (en) * | 2017-12-13 | 2020-07-10 | 山东齐鲁华信高科有限公司 | Preparation method of H-SSZ-13 molecular sieve |
| CN108059172A (en) * | 2017-12-13 | 2018-05-22 | 山东齐鲁华信高科有限公司 | The preparation method of H-SSZ-13 molecular sieves |
| CN108529642A (en) * | 2018-05-24 | 2018-09-14 | 山东泓泰恒瑞新材料有限公司 | A kind of preparation method of Cu-SSZ-13 molecular sieves |
| CN109126862A (en) * | 2018-08-20 | 2019-01-04 | 中国汽车技术研究中心有限公司 | It is a kind of accelerate synthesis CHA structure molecular sieve method and its catalyst NH3-SCR reaction in application |
| CN109534354A (en) * | 2018-11-12 | 2019-03-29 | 山东国瓷功能材料股份有限公司 | A kind of synthetic method of SSZ-13 molecular sieve |
| CN109569320A (en) * | 2018-12-26 | 2019-04-05 | 韩小学 | A method of mixing crystal seed method prepares pure phase SSZ-13 molecular screen membrane |
| CN109665545A (en) * | 2019-02-14 | 2019-04-23 | 正大能源材料(大连)有限公司 | A kind of synthetic method of controllable appearance SSZ-13 molecular sieve |
| CN109665545B (en) * | 2019-02-14 | 2022-07-01 | 正大能源材料(大连)有限公司 | Synthesis method of morphology-controllable SSZ-13 molecular sieve |
| CN110156610A (en) * | 2019-05-22 | 2019-08-23 | 无锡威孚环保催化剂有限公司 | A method of recycling template from SSZ-13 Zeolite synthesis waste liquid |
| CN110156610B (en) * | 2019-05-22 | 2021-12-24 | 无锡威孚环保催化剂有限公司 | Method for recovering template from SSZ-13 molecular sieve synthesis waste liquid |
| CN110357121A (en) * | 2019-08-02 | 2019-10-22 | 太原理工大学 | A kind of preparation method of little crystal grain nanometer hierarchical pore SSZ-13 molecular sieve |
| CN112939020A (en) * | 2021-04-09 | 2021-06-11 | 南京诚志清洁能源有限公司 | Stepped crystallization preparation method and application of Cu-SSZ-13 molecular sieve catalyst |
| CN112939020B (en) * | 2021-04-09 | 2023-09-29 | 南京诚志清洁能源有限公司 | Stepped crystallization preparation method and application of Cu-SSZ-13 molecular sieve catalyst |
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