CN103553075A - Method for continuously synthesizing SAPO-34 molecular sieve by ionothermal process - Google Patents
Method for continuously synthesizing SAPO-34 molecular sieve by ionothermal process Download PDFInfo
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- CN103553075A CN103553075A CN201310516836.2A CN201310516836A CN103553075A CN 103553075 A CN103553075 A CN 103553075A CN 201310516836 A CN201310516836 A CN 201310516836A CN 103553075 A CN103553075 A CN 103553075A
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Abstract
The invention relates to a method for continuously synthesizing a SAPO-34 molecular sieve by an ionothermal process, belonging to the technical field of molecular sieve synthesis. The method comprises the following step: by using an ionic liquid as a circulating solvent, carrying out continuous feed, gelatinization, crystallization and separation on the reactant to obtain a molecular sieve product, wherein the ionic liquid and unreacted raw material are separated by distillation for cyclic utilization. The method provided by the invention is different from the traditional intermittent molecular sieve hydrothermal synthesis method, can implement continuous synthesis of the molecular sieve under near normal pressure conditions, can recycle the unreacted component in the mother solution, has the advantages of continuous industrial production, high production efficiency and no waste liquid discharge, lowers the synthesis cost, shortens the production cycle, and is environment-friendly.
Description
Technical field
The present invention relates to Zeolite synthesis technical field, be specifically related to a kind of with the hot method of the ion method of synthetic SAPO-34 molecular sieve continuously.
Background technology
Aluminium phosphate molecular sieve is after Si-Al molecular sieve, and U.S. combinating carbide company is at the molecular sieve of new generation (USP4310440) of early eighties exploitation in last century.The aluminium silicophosphate SAPO(MAPO that silicon (or other metal heteroatom M) is introduced) molecular sieve, skeleton has acidic site, has therefore expanded the purposes of this molecular sieve.
2004, Morris professor's people from research group reported and used ionic liquid as the ion process for thermosynthesizing (Nature430,1012-1016 (2004)) of solvent and the synthetic microporous aluminium phosphate molecular sieve of template.Ion thermal synthesis can be carried out under normal pressure, and this is mainly because ionic liquid has insignificant saturated vapor pressure.The research of Tian Zhijian research group shows, ion thermal synthesis crystallization time can shorten to 1-10 minute (Xu, Y.P.et al.Angew.Chem., Int.Ed.45,3965-3970 (2006)).This also makes the fast rapid-result molecular sieve that produces of ionic liquid continous way become possibility.
SAPO-34 molecular sieve is U.S. associating carbon compound company (UCC) in nineteen eighty-two a member in synthetic SAPO-n Series Molecules sieve first, and at present, this molecular sieve is all synthetic with traditional hydrothermal method.
No matter synthesizing of above-mentioned molecular sieve is that traditional hydrothermal synthesis method or ion thermal synthesis method is step synthesis technique.The mode of production operating in batches.This process, material adds in batches, emits in batches, and reaction process is without the turnover of material, and the reactor volume of scale operation is large, facility investment is high.
Summary of the invention
The object of the invention is for solving fast and quantity-produced problem, a kind of method of continuously synthetic SAPO-34 aluminium phosphate molecular sieve is provided, it is circulating solvent that the method adopts ionic liquid, utilize ion thermal synthesis method reactant to obtain molecular sieve product through continous way charging, plastic, crystallization after separated, serialization industrial production, production efficiency is high, the recycle after fractionation by distillation of ionic liquid and unreacting material, greatly reduce synthetic cost, shorten the production cycle, and environmentally friendly without the discharge of waste liquid.
The present invention is a kind of with the hot method of the ion method of synthetic SAPO-34 molecular sieve continuously, it is characterized in that, employing ionic liquid is circulating solvent, the reactant of continuously feeding enters in tubular reactor crystallization rapidly through pre-plastic is laggard, after washing separation, obtain molecular sieve product, the recycle after fractionation by distillation of ionic liquid and unreacting material; Specifically comprise:
A) silicon source ,Lv source, masterplate agent, phosphorus source and mineralizer add to according to a certain percentage in the plastic cans containing ionic liquid and stir pre-plastic, and temperature is controlled at 60～120 ℃, pre-plastic 1～300 minute; Wherein said plastic cans Raw mixture has following mole of composition: ionic liquid: SiO
2: Al
2o
3: P
2o
5: mineralizer: template: H
2o=5～200:0～1.2:0.01～1.2:0.01～1.2:0.01～1.2:0.05～2.0:0.01～0.2;
B) the pre-plastic product in plastic cans is squeezed into tubular reactor through fresh feed pump and is heated at 100～250 ℃ crystallization 1～300 minute, and more excellent crystallization temperature is 140～190 ℃, and crystallization time is 10～60 minutes;
C) and b) step, is fed to fresh ,Lv source, silicon source, masterplate agent, phosphorus source and mineralizer in plastic cans simultaneously; Preferred feedstock flow velocity is 1-10ml/min.
D) separation after washing of the crystallization product mixtures after step b) crystallization obtains molecular sieve product;
E) water lotion is delivered to rectifying tower rectifying separation;
F) ionic liquid after rectifying and unreacted raw material cycling stream are continued to participate in reaction to plastic cans; Distilled water cycling stream after rectifying is washed reaction after product to filtration washing device;
Wherein, described silicon source is one or more in solid silicone, silicon sol, white carbon black, kaolin, polynite, water glass and tetraethoxy;
Described aluminium source is one or more in aluminium powder, aluminum oxide, aluminium hydroxide, sodium metaaluminate, potassium metaaluminate, Tai-Ace S 150, aluminum chloride, aluminum nitrate and Burow Solution;
Described phosphorus source is one or more in phosphoric acid, ammonium phosphate, ammonium hydrogen phosphate, Secondary ammonium phosphate; Described ionic liquid is one or more in 1-butyl-3-methyl-bromination imidazoles, 1-propyl group-3-methyl-bromination imidazoles, 1-ethyl-3-methyl-bromination imidazoles, 1-butyl-3-methyl-imidazolitm chloride, 1-propyl group-3-methyl-imidazolitm chloride, 1-ethyl-3-methyl-imidazolitm chloride, and preferred ion liquid is one or more in 1-butyl-3-methyl-bromination imidazoles, 1-propyl group-3-methyl-bromination imidazoles, 1-ethyl-3-methyl-bromination imidazoles;
Described masterplate agent is one or more in N-Methylimidazole, glyoxal ethyline, N-picoline, 2-picoline;
The type of heating of described tubular reactor is conventional heating by electric cooker, steam-heated cal(l)andria, oil bath heating or Microwave-assisted firing, is preferably oil bath heating or Microwave-assisted firing;
Described mineralizer is one or more in hydrofluoric acid, Neutral ammonium fluoride, Sodium Fluoride and Potassium monofluoride.
The present invention is the method for synthetic SAPO-34 aluminium phosphate molecular sieve continuously, and its beneficial effect is: 1) reactant obtains molecular sieve product through continous way charging, plastic, crystallization after separated, and reaction is with Guan Suiting; 2) ionic liquid and unreacting material recycle after fractionation by distillation, reclaims the molecular sieve crystallite that has the reaction of having neither part nor lot in the raw material circulating, and can in circulation crystallization process, promote crystallization; Ionic liquid synthesis of molecular sieve can complete crystallization at normal pressure and within very short time, and this continous way is produced becomes possibility, greatly shortens the production cycle, and without the discharge of waste liquid waste water, environmental friendliness.
Accompanying drawing explanation
Fig. 1 is that the present invention synthesizes the process flow diagram of the method for SAPO-34 molecular sieve continuously with the hot method of ion;
Fig. 2 is that the embodiment of the method 1 that the present invention synthesizes SAPO-34 molecular sieve continuously with the hot method of ion obtains sieve sample XRD figure.
In figure, 1. plastic cans, 2. fresh feed pump, 3. tubular reactor, 4. rectifying tower, 5. filtration washing device.
Specific embodiment
Below in conjunction with drawings and Examples, the present invention will be further described, but not thereby limiting the invention.
Fig. 1 is that the present invention synthesizes the process flow diagram of SAPO-34 molecular sieve continuously with the hot method of ion, in this technical process the reaction unit that adopts for teflon-lined tubular reactor 3, design parameter is that liner useful length is 127.4cm, the effective internal diameter of liner is 5mm, and tubular reactor 3 effective volumes are 100ml.
Embodiment 1
According to mol ratio, be ionic liquid: SiO
2: Al
2o
3: P
2o
5: HF:N-Methylimidazole=7.37:0:1:1:1:0.33 stirs plastic 30 minutes by 31.6g1-butyl-3-methyl-bromination imidazoles, 3.8g aluminum isopropylate, 2.18 phosphoric acid, 0.5g hydrofluoric acid and 0.27g N-Methylimidazole in plastic cans 1, and temperature is at 60 ℃; By coutroi velocity, 1-butyl-3-methyl-bromination imidazoles, Tai-Ace S 150, phosphoric acid, hydrofluoric acid and N-Methylimidazole are fed in plastic cans 1 according to aforementioned proportion, make each material component keep constant; Colloidal sol in plastic cans is squeezed into tubular reactor 3 at 150 ℃ of heating crystallizations through fresh feed pump 2 simultaneously, by coutroi velocity be 5ml/min to make crystallization time be 20 minutes, the reactant after crystallization obtains zeolite product through washing; Washing obtains water lotion and is delivered to rectifying tower 4 rectifying separation, and the ionic liquid after rectifying and unreacted feedstream continue to participate in reaction to head tank, and the distilled water after rectifying flows to 5 pairs of reaction after products of filtration washing device and washes.To obtaining reaction product SAPO-34 sieve sample, carry out the test of productive rate and relative crystallinity.In the present invention, related productive rate is the butt weight/g of the sieve sample obtaining per hour, and relative crystallinity involved in the present invention is to stipulate that the degree of crystallinity of embodiment 1 gained sample is 100%, and other embodiment samples result is by comparison its relative crystallinity.Sieve sample productive rate and relative crystallinity that the present embodiment is obtained are listed in table 1.
With embodiment 1, wherein material molar ratio is ionic liquid: SiO
2: Al
2o
3: P
2o
5: HF: masterplate agent=7.37:0.5:1:1:0.27:0.54,31.6g1-butyl-3-methyl-bromination imidazoles, 2g silicon sol, 3.8g aluminum isopropylate, 2.18 phosphoric acid, 0.14g hydrofluoric acid and 0.44g N-Methylimidazole; Tubular reactor is that to make crystallization time be 30 minutes to 3.3ml/min by coutroi velocity.Sieve sample productive rate and relative crystallinity that the present embodiment is obtained are listed in table 1.
Embodiment 3
With embodiment 2, wherein material molar ratio is ionic liquid: SiO
2: Al
2o
3: P
2o
5: HF: masterplate agent=7.2:0.7:1:1:1:0.5,30.8g1-butyl-3-methyl-bromination imidazoles, 2.8g silicon sol, 3.8g aluminum isopropylate, 2.18 phosphoric acid, 0.5g hydrofluoric acid and 0.41g N-Methylimidazole; Tubular reactor is at 170 ℃ of heating crystallizations, and by coutroi velocity 2.5ml/min, making crystallization time is 40 minutes.Sieve sample productive rate and relative crystallinity that the present embodiment is obtained are listed in table 1.
Embodiment 4
With embodiment 2, wherein material molar ratio is ionic liquid: SiO
2: Al
2o
3: P
2o
5: HF: masterplate agent=7.4:0.8:1:1:1.07:0.6,31.7g1-butyl-3-methyl-bromination imidazoles, 3.2g silicon sol, 3.8g aluminum isopropylate, 2.18 phosphoric acid, 0.54g hydrofluoric acid and 0.5g N-Methylimidazole; Tubular reactor is at 160 ℃ of heating crystallizations, by coutroi velocity, is that to make crystallization time be 50 minutes to 2ml/min.Sieve sample productive rate and relative crystallinity that the present embodiment is obtained are listed in table 1.
With embodiment 2, wherein tubular reactor type of heating is Microwave-assisted firing, and well heater is crystallization at 130 ℃, by coutroi velocity, is that to make crystallization time be 10 minutes to 10ml/min.Sieve sample productive rate and relative crystallinity that the present embodiment is obtained are listed in table 1.
Embodiment 6
With embodiment 2, wherein aluminium source is Tai-Ace S 150 3.2g.Sieve sample productive rate and relative crystallinity that the present embodiment is obtained are listed in table 1.
Embodiment 7
With embodiment 2, wherein template is glyoxal ethyline.Sieve sample productive rate and relative crystallinity that the present embodiment is obtained are listed in table 1.
Embodiment 8
With embodiment 2, wherein ionic liquid is 1-butyl-3-methyl-imidazolitm chloride 25.1g.Sieve sample productive rate and relative crystallinity that the present embodiment is obtained are listed in table 1.
Table 1. embodiment 1-8 molecular sieve productive rate and relative crystallinity
| Sample | Productive rate (butt g/h) | Relative crystallinity % * |
| 1 | 15 | 100 |
| 2 | 9.9 | 98 |
| 3 | 7.5 | 95 |
| 4 | 6 | 102 |
| 5 | 30 | 89 |
| 6 | 9.9 | 105 |
| 7 | 10 | 98 |
| 8 | 9.7 | 96 |
*note: the degree of crystallinity of embodiment 1 sieve sample of take is 100%.
Claims (2)
1. one kind is synthesized the method for SAPO-34 molecular sieve continuously with the hot method of ion, it is characterized in that, employing ionic liquid is circulating solvent, the reactant of continuously feeding enters in tubular reactor crystallization rapidly through pre-plastic is laggard, after washing separation, obtain molecular sieve product, the recycle after fractionation by distillation of ionic liquid and unreacting material; Specifically comprise:
A) silicon source ,Lv source, masterplate agent, phosphorus source and mineralizer add to according to a certain percentage in the plastic cans containing ionic liquid and stir pre-plastic, and temperature is controlled at 60～120 ℃, pre-plastic 1～300 minute; Wherein said plastic cans Raw mixture has following mole of composition: ionic liquid: SiO
2: Al
2o
3: P
2o
5: template: H
2o: mineralizer=5～200:0～1.2:0.01～1.2:0.01～1.2:0.05～2.0:0.01～0.2:0.01～1.2;
B) the pre-plastic product in plastic cans is squeezed into tubular reactor through fresh feed pump and is heated at 100～250 ℃ crystallization 1～300 minute;
C) and b) step, is fed to fresh ,Lv source, silicon source, masterplate agent, phosphorus source and mineralizer in plastic cans simultaneously;
D) separation after washing of the crystallization product mixtures after step b) crystallization obtains molecular sieve product;
E) water lotion is delivered to rectifying tower rectifying separation;
F) ionic liquid after rectifying and unreacted raw material cycling stream are continued to participate in reaction to plastic cans; Distilled water cycling stream after rectifying is washed reaction after product to filtration washing device;
Wherein, described silicon source is one or more in solid silicone, silicon sol, white carbon black, kaolin, polynite, water glass and tetraethoxy; Described aluminium source is one or more in aluminium powder, aluminum oxide, aluminium hydroxide, sodium metaaluminate, potassium metaaluminate, Tai-Ace S 150, aluminum chloride, aluminum nitrate and Burow Solution; Described ionic liquid is one or more in 1-butyl-3-methyl-bromination imidazoles, 1-propyl group-3-methyl-bromination imidazoles, 1-ethyl-3-methyl-bromination imidazoles, 1-butyl-3-methyl-imidazolitm chloride, 1-propyl group-3-methyl-imidazolitm chloride, 1-ethyl-3-methyl-imidazolitm chloride; Described masterplate agent is one or more in N-Methylimidazole, glyoxal ethyline, N-picoline, 2-picoline; The type of heating of tubular reactor is conventional heating by electric cooker, steam-heated cal(l)andria, oil bath heating or Microwave-assisted firing; Mineralizer is one or more in hydrofluoric acid, Neutral ammonium fluoride, Sodium Fluoride, Potassium monofluoride; Phosphorus source is one or more in phosphoric acid, ammonium phosphate, ammonium hydrogen phosphate, Secondary ammonium phosphate.
2. method according to claim 1, is characterized in that: specifically comprise:
A) silicon source ,Lv source, masterplate agent, phosphorus source and mineralizer add in the plastic cans containing ionic liquid and stir pre-plastic, and temperature is controlled at 60～120 ℃, pre-plastic 1～300 minute;
B) the pre-plastic product in plastic cans is squeezed into tubular reactor through fresh feed pump and be heated to 140-190 ℃ of crystallization 10～60min;
C) and b) simultaneously, fresh ,Lv source, silicon source, masterplate agent, phosphorus source and mineralizer are fed in plastic cans step, make each material component keep constant;
D) separation after washing of the reaction mixture after crystallization obtains molecular sieve product;
E) water lotion step d) being obtained is delivered to rectifying tower rectifying separation;
F) ionic liquid after rectifying and unreacted raw material cycling stream are continued to participate in reaction to plastic cans; Distilled water cycling stream after rectifying is washed reaction after product to filtration washing device;
The type of heating of described tubular reactor is oil bath heating or Microwave-assisted firing;
Described ionic liquid is 1-butyl-3-methyl-bromination imidazoles, 1-propyl group-3-methyl-bromination imidazoles or 1-ethyl-3-methyl-bromination imidazoles.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107324353A (en) * | 2017-06-26 | 2017-11-07 | 神华集团有限责任公司 | The preparation method of the molecular sieves of SAPO 34 and the preparation method of catalyst |
| CN108147427A (en) * | 2016-12-05 | 2018-06-12 | 中国科学院大连化学物理研究所 | A kind of CHA types hetero atom Metal-aluminophosphate Molecular Siever and preforming synthetic method |
| CN108147422A (en) * | 2016-12-05 | 2018-06-12 | 中国科学院大连化学物理研究所 | A kind of CHA types Activity of Magnesium Aluminophosphate Molecular Sieve and preforming synthetic method |
| CN115215351A (en) * | 2022-06-12 | 2022-10-21 | 中海油天津化工研究设计院有限公司 | Method and device for continuously producing molecular sieve in tubular reactor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1834015A (en) * | 2005-03-18 | 2006-09-20 | 中国科学院大连化学物理研究所 | Synthetic process of SAPO-11 Molecular sieve |
| CN1850606A (en) * | 2006-06-07 | 2006-10-25 | 中国科学院大连化学物理研究所 | Method for preparing AlPO4 or SAPO molecular sieve |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1834015A (en) * | 2005-03-18 | 2006-09-20 | 中国科学院大连化学物理研究所 | Synthetic process of SAPO-11 Molecular sieve |
| CN1850606A (en) * | 2006-06-07 | 2006-10-25 | 中国科学院大连化学物理研究所 | Method for preparing AlPO4 or SAPO molecular sieve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108147427A (en) * | 2016-12-05 | 2018-06-12 | 中国科学院大连化学物理研究所 | A kind of CHA types hetero atom Metal-aluminophosphate Molecular Siever and preforming synthetic method |
| CN108147422A (en) * | 2016-12-05 | 2018-06-12 | 中国科学院大连化学物理研究所 | A kind of CHA types Activity of Magnesium Aluminophosphate Molecular Sieve and preforming synthetic method |
| CN107324353A (en) * | 2017-06-26 | 2017-11-07 | 神华集团有限责任公司 | The preparation method of the molecular sieves of SAPO 34 and the preparation method of catalyst |
| CN115215351A (en) * | 2022-06-12 | 2022-10-21 | 中海油天津化工研究设计院有限公司 | Method and device for continuously producing molecular sieve in tubular reactor |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Patentee after: CNOOC TIANJIN CHEMICAL RESEARCH & DESIGN INSTITUTE Co.,Ltd. Patentee after: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. Patentee before: CNOOC TIANJIN CHEMICAL RESEARCH & DESIGN INSTITUTE Patentee before: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. |
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Effective date of registration: 20161008 Address after: No. three road 300131 Tianjin city Hongqiao District dingzigu No. 85 Patentee after: CNOOC TIANJIN CHEMICAL RESEARCH & DESIGN INSTITUTE Co.,Ltd. Patentee after: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. Patentee before: CNOOC TIANJIN CHEMICAL RESEARCH & DESIGN INSTITUTE Co.,Ltd. Patentee before: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. |