CN106902821A - 一种蛋黄型的负载型催化剂的制备方法 - Google Patents
一种蛋黄型的负载型催化剂的制备方法 Download PDFInfo
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- 238000002803 maceration Methods 0.000 claims abstract description 17
- 239000002253 acid Substances 0.000 claims abstract description 12
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 6
- 238000007598 dipping method Methods 0.000 claims abstract description 6
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- 238000005979 thermal decomposition reaction Methods 0.000 claims abstract description 4
- 239000004480 active ingredient Substances 0.000 claims abstract description 3
- 239000000969 carrier Substances 0.000 claims abstract description 3
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- 229910052763 palladium Inorganic materials 0.000 claims description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical group [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 12
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 10
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- 238000001035 drying Methods 0.000 claims description 3
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- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 3
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- 238000006243 chemical reaction Methods 0.000 abstract description 9
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 3
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- 229910052739 hydrogen Inorganic materials 0.000 abstract description 3
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- 239000007788 liquid Substances 0.000 description 5
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- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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- 230000009849 deactivation Effects 0.000 description 1
- 210000003278 egg shell Anatomy 0.000 description 1
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- 238000001802 infusion Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- GPNDARIEYHPYAY-UHFFFAOYSA-N palladium(ii) nitrate Chemical compound [Pd+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O GPNDARIEYHPYAY-UHFFFAOYSA-N 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/396—Distribution of the active metal ingredient
- B01J35/398—Egg yolk like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/58—Platinum group metals with alkali- or alkaline earth metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
- B01J23/8906—Iron and noble metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
- B01J23/8933—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/8946—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with alkali or alkaline earth metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Abstract
本申请公开了一种蛋黄型的负载型催化剂的制备方法,在载体上负载活性成分形成催化剂,活性成分含量为0.05‑0.3%,活性成分均匀分布于载体内部,催化剂外部形成惰性层,具体步骤如下:S1,将活性成分和助剂加入到酸溶液中制成浸渍液;S2,将载体浸入到浸渍液中进行浸渍获得催化剂;S3,将催化剂加入到酸溶液中超声,除去催化剂表面的活性成份,载体的外表面成为催化剂外部的惰性层,获得蛋黄型催化剂;S4,蛋黄型催化剂通过中和或热分解方式进行固化。由此,制备的催化剂,活性成分以氧化物形式存在,使用前用氢气还原成单质,外层有惰性层,降低反应初活性,中间的活性成分均匀分布,提高催化剂的有效利用率,还提高了安全性。
Description
技术领域
本发明涉及催化剂,尤其涉及一种蛋黄型的负载型催化剂的制备方法。
背景技术
CO气相催化偶联合成草酸二烷基酯是快速高放热的反应,反应过程中飞温会引起催化剂快速失活,甚至导致安全事故。
现有催化剂生产技术基本都是采用浸渍法,把活性成分负载在球形氧化铝上,根据活性组分的在球体分布情况分为蛋壳、蛋白、蛋黄和均匀型。在相同活性组分负载量的情况下,活性组分越集中在表层,其催化活性越高,现有的催化剂,追求活性成分钯分布集中于外层,虽然初活性高,但是表层放热集中,导致使用寿命短。外层的钯在反应气流的冲击下随粉末脱落,难以回收,造成钯流失。而且流失的含钯粉末可能在管道内局部聚积造成过热点,引起燃烧爆炸等安全事故。
发明内容
本发明的目的是在于提供一种蛋黄型的负载型催化剂的制备方法,解决上述现有技术问题中的一个或者多个。
根据本发明的一个方面,提供一种蛋黄型的负载型催化剂的制备方法,在载体上负载活性成分形成催化剂,活性成分含量为0.05-0.3%,活性成分均匀分布于载体内部,催化剂外部形成惰性层,具体步骤如下:
S1,将活性成分和助剂加入到酸溶液中制成浸渍液;
S2,将载体浸入到浸渍液中进行浸渍1.5-3h获得催化剂,取出催化剂,沥去多余溶液;
S3,将步骤S2得到的催化剂加入到酸溶液中超声1-3min,除去催化剂表面的活性成份,使载体的表面位于催化剂表面的最外层,载体的外表面成为催化剂外部的惰性层,获得蛋黄型催化剂,取出蛋黄型催化剂,沥去多余溶液;
S4,将步骤S3得到的蛋黄型催化剂通过中和或热分解方式进行固化。
由此,制备的催化剂,活性成分以氧化物形式存在,使用前用氢气还原成单质,外层有0.1-1mm的惰性层,降低反应初活性,减缓反应放热。中间的活性成分均匀分布,提高催化剂的有效利用率,减少活性成分的流 失,防止流失的活性成分引起燃烧爆炸等危险。
在一些实施方式中:载体为α-氧化铝、γ-氧化铝、二氧化硅、碳化硅、硅藻土、活性炭、浮石、沸石、分子筛或二氧化钛。
在一些实施方式中:酸溶液为浓度为0.5-10%的盐酸、硝酸、柠檬酸、EDTA或硫脲。
在一些实施方式中:活性成分为钯、铂、钌或铑。
在一些实施方式中:助剂为铁盐、锌盐、镁盐、镍盐、钴盐、铈盐、钛盐或锆盐。
在一些实施方式中:步骤S4为将蛋黄型催化剂进行干燥和焙烧;干燥温度20-90℃,时间10-600min,焙烧过程在含氧气氛中进行,温度200-400℃,时间60-600min。
在一些实施方式中:步骤S4为用5%的氢氧化钠溶液洗涤蛋黄型催化剂1次,用去离子水洗涤蛋黄型催化剂5次;再用120度热空气干燥30-300min。
具体实施方式
下面对本发明作进一步详细说明。
一种蛋黄型的负载型催化剂的制备方法,在载体上负载活性成分形成催化剂,活性成分含量为0.05-0.3%,活性成分均匀分布于载体内部,催化剂外部形成惰性层,具体步骤如下:
S1,将活性成分和助剂加入到酸溶液中制成浸渍液;
S2,将载体浸入到浸渍液中进行浸渍1.5-3h获得催化剂,取出催化剂,沥去多余溶液;
S3,将步骤S2得到的催化剂加入到酸溶液中超声1-3min,除去催化剂表面的活性成份,使载体的表面位于催化剂表面的最外层,载体的外表面成为催化剂外部的惰性层,获得蛋黄型催化剂,取出蛋黄型催化剂,沥去多余溶液;
S4,将步骤S3得到的蛋黄型催化剂通过中和或热分解方式进行固化。
由此,制备的催化剂外层有0.5-5mm的惰性层,降低反应初活性,减缓反应放热。中间的活性成分均匀分布,提高催化剂的有效利用率,减少活性成分的流失,防止流失的活性成分引起燃烧爆炸等危险。
其中,载体可以是α-氧化铝、γ-氧化铝、二氧化硅、碳化硅、硅藻土、活性炭、浮石、沸石、分子筛或二氧化钛。
其中,酸溶液可以是浓度为0.5-10%的盐酸、硝酸、柠檬酸、EDTA或硫脲。
其中,活性成分可以是钯、铂、钌或铑。
其中,助剂可以是铁盐、锌盐、镁盐、镍盐、钴盐、铈盐、钛盐或锆盐。
其中,步骤S4可以为将蛋黄型催化剂进行干燥和焙烧;干燥温度20-90℃,时间10-600min,焙烧过程在含氧气氛中进行,温度200-400℃,时间60-600min。
其中,步骤S4可以为用5%的氢氧化钠溶液洗涤蛋黄型催化剂1次,用去离子水洗涤蛋黄型催化剂5次;再用120度热空气干燥30-300min。
实施例1:
用氯化钯、氯化铁、盐酸配制成钯含量0.52%,铁含量0.20%、盐酸浓度0.5%的浸渍液,取球形α-氧化铝载体50g在100mL浸渍液浸渍2小时,载体从浸渍液中取出,吸去表面游离水分;放入100mL0.5%盐酸超声1分钟,取出吸取表面残留水分,用5%的氢氧化钠溶液洗涤1次,去离子水洗涤5次;产品用120度热空气干燥;最终产品钯含量为0.21%。
实施例2:
用硝酸钯、硝酸盐、EDTA配制成钯含量0.40%,锌含量0.08%、EDTA浓度5%的浸渍液,取球形α-氧化铝载体50g在100mL浸渍液浸渍2小时,载体从浸渍液中取出,吸去表面游离水分;放入100mL5%EDTA溶液中超声1分钟,取出在350下焙烧;最终产品钯含量0.16%。
实施例3:
用氯化钯、氯化铁、氯化镁、盐酸配制成钯含量0.63%,铁含量0.10%、镁含量0.05%、盐酸浓度5%的浸渍液,取球形α-氧化铝载体50g在100mL浸渍液浸渍2小时,载体从浸渍液中取出,吸去表面游离水分;放入100mL0.1%盐酸超声1分钟,取出吸取表面残留水分,用10%的氢氧化钠溶液洗涤1次,去离子水洗涤5次;产品用120度热空气干燥;最终产品钯含量为0.25%。
实施例4:
用氯铂酸、氯化镁、盐酸配制成铂含量0.25%,镁含量0.05%,盐酸浓度3%的浸渍液,取球形α-氧化铝载体50g在100mL浸渍液浸渍2小时,载体从浸渍液中取出,吸去表面游离水分;放入100mL2%盐酸超声1分钟,取出吸取表面残留水分,用10%的碳酸钠溶液洗涤1次,去离子水洗涤5次;产品用120度热空气干燥;最终产品铂含量为0.10%。
综上所述,本发明制备的催化剂,活性成分以氧化物形式存在,使用前用氢气还原成单质,外层有0.1-1mm的惰性层,降低反应初活性,减缓反应放热。中间的活性成分均匀分布,提高催化剂的有效利用率,减少活 性成分的流失,防止流失的活性成分引起燃烧爆炸等危险。
以上所述仅是本发明的一种实施方式,应当指出,对于本领域普通技术人员来说,在不脱离本发明创造构思的前提下,还可以做出若干相似的变形和改进,这些也应视为本发明的保护范围之内。
Claims (7)
1.一种蛋黄型的负载型催化剂的制备方法,其特征在于:在载体上负载活性成分形成催化剂,活性成分含量为0.05-0.3%,活性成分均匀分布于载体内部,催化剂外部形成0.1-1mm惰性层,具体步骤如下:
S1,将活性成分和助剂加入到酸溶液中制成浸渍液;
S2,将载体浸入到浸渍液中进行浸渍1.5-3h获得催化剂,取出催化剂,沥去多余溶液;
S3,将步骤S2得到的催化剂加入到酸溶液中超声1-3min,除去催化剂表面的活性成份,使载体的表面位于催化剂表面的最外层,载体的外表面成为催化剂外部的惰性层,获得蛋黄型催化剂,取出蛋黄型催化剂,沥去多余溶液;
S4,将步骤S3得到的蛋黄型催化剂通过中和或热分解方式进行固化。
2.根据权利要求1所述的一种蛋黄型的负载型催化剂的制备方法,其特征在于:所述载体为α-氧化铝、γ-氧化铝、二氧化硅、碳化硅、硅藻土、活性炭、浮石、沸石、分子筛或二氧化钛。
3.根据权利要求1所述的一种蛋黄型的负载型催化剂的制备方法,其特征在于:所述酸溶液为浓度为0.5-10%的盐酸、硝酸、柠檬酸、EDTA或硫脲。
4.根据权利要求1所述的一种蛋黄型的负载型催化剂的制备方法,其特征在于:所述活性成分为钯、铂、钌或铑。
5.根据权利要求1所述的一种蛋黄型的负载型催化剂的制备方法,其特征在于:所述助剂为铁盐、锌盐、镁盐、镍盐、钴盐、铈盐、钛盐或锆盐。
6.根据权利要求1所述的一种蛋黄型的负载型催化剂的制备方法,其特征在于:所述步骤S4为将蛋黄型催化剂进行干燥和焙烧;干燥温度20-90℃,时间10-600min,所述焙烧过程在含氧气氛中进行,温度200-400℃,时间60-600min。
7.根据权利要求1所述的一种蛋黄型的负载型催化剂的制备方法,其特征在于:所述步骤S4为用5%的氢氧化钠溶液洗涤蛋黄型催化剂1次,用去离子水洗涤蛋黄型催化剂5次;再用120度热空气干燥30-300min。
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