WO2008019582A1 - Catalyseur pd/c supporté et son procédé de préparation - Google Patents
Catalyseur pd/c supporté et son procédé de préparation Download PDFInfo
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- WO2008019582A1 WO2008019582A1 PCT/CN2007/002322 CN2007002322W WO2008019582A1 WO 2008019582 A1 WO2008019582 A1 WO 2008019582A1 CN 2007002322 W CN2007002322 W CN 2007002322W WO 2008019582 A1 WO2008019582 A1 WO 2008019582A1
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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
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/44—Palladium
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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
- 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
- B01J35/391—Physical properties of the active metal ingredient
- B01J35/393—Metal or metal oxide crystallite size
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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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
- B01J35/45—Nanoparticles
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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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
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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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0201—Impregnation
- B01J37/0203—Impregnation the impregnation liquid containing organic compounds
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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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0201—Impregnation
- B01J37/0207—Pretreatment of the support
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C55/00—Saturated compounds having more than one carboxyl group bound to acyclic carbon atoms
- C07C55/22—Tricarboxylic acids
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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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/18—Carbon
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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
- B01J2235/00—Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
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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
- B01J2235/00—Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
- B01J2235/15—X-ray diffraction
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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
- 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
- B01J35/391—Physical properties of the active metal ingredient
- B01J35/394—Metal dispersion value, e.g. percentage or fraction
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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
- 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
- B01J35/397—Egg shell 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/10—Heat treatment in the presence of water, e.g. steam
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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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/16—Reducing
Definitions
- the present invention relates to a metal palladium catalyst supported on activated carbon (hereinafter referred to as supported palladium/carbon catalyst) and a preparation method thereof, and particularly to a method for refining crude terephthalic acid by selective hydrogenation reaction Acid-supported palladium/carbon catalyst and preparation method thereof.
- supported palladium/carbon catalyst a metal palladium catalyst supported on activated carbon
- Supported palladium/carbon catalysts are widely used for the selective hydrogenation of unsaturated organics.
- a negative-supporting palladium/carbon catalyst is suitable for the purification of crude terephthalic acid, in which some impurities in crude terephthalic acid such as p-carboxyphenyl hydrazine (cylinder called 4-CBA) are converted into hydrogenation by hydrogenation.
- Other compounds, followed by terephthalic acid products, can be isolated and purified by crystallization. Since the palladium/carbon catalyst usually employs a single active component, the improvement in the prior art has mainly focused on the structure of the support and the distribution of the metal Pd on the support, and these aspects do have a great effect on the performance of the catalyst. Impact.
- the hydrotreating reaction of terephthalic acid is a first-order reaction, the reaction rate is fast, and it is difficult for the reactants to penetrate into the inside of the catalyst particles to carry out the reaction, which makes the active components inside the particles ineffective. Therefore, in order to make full use of the noble metal, the palladium/carbon catalyst is usually made into an eggshell type, that is, the active component precious metal is mainly supported on the surface of the carrier.
- a solution containing a Pd-containing compound such as sodium chloropalladate or palladium chloride
- a very thin and shiny metal Pd layer will appear on the surface of the activated carbon, mainly because the surface of the activated carbon contains a ruthenium. Reducing groups and free electrons, which are highly susceptible to the reduction of Pd ions to zero-valent metal Pd. Therefore, the catalyst thus obtained has a very low metal Pd dispersion.
- One method for overcoming this problem is to convert Pd ions in an immersion liquid containing a Pd compound into an insoluble compound before the impregnation process.
- the water-soluble compound of Pd is hydrolyzed to insoluble Pd(OH) 2 or PdO H 2 0 at room temperature, and then loaded on activated carbon, followed by reduction with formaldehyde, sodium citrate, glucose, citric acid or hydrogen. The agent is reduced, which prevents migration of Pd and grain growth. Hydrogen peroxide is added to the impregnation solution to hydrolyze the water-soluble compound of Pd to form an insoluble compound, which is then impregnated, as taught in U.S. Patent No. 3,138,560.
- 4,476,242 teaches the use of an organic solvent such as decyl alcohol or pyridine to prepare an impregnating solution containing a Pd compound, which is said to be very effective in preventing the migration of Pd.
- an organic solvent such as decyl alcohol or pyridine
- the conversion of the chloropalladium acid solution into a palladium-containing colloidal solution by adjusting the pH value is said to prevent the reducing group on the surface of the activated carbon from directly reducing the Pd ion to the zero-valent metal Pd.
- CN1698952A discloses the addition of a nitrogen-containing polycarboxylic acid agent to an impregnation liquid for preparing a palladium/carbon catalyst. Summary of invention
- the metal Pd in the catalyst has a higher dispersion, a higher crystallite content, and better thermal stability.
- the catalyst can provide high conversion to p-carboxybenzaldehyde (4-CBA).
- Another object of the present invention is to provide a process for preparing the supported palladium on carbon catalyst. Detailed description of a preferred embodiment
- the present invention provides a supported palladium/carbon catalyst in which palladium supported on a supported activated carbon exists in a nanometer-sized crystal form, and wherein the crystallite having a particle size of less than 2.5 nm accounts for the total amount of palladium crystallites. 80% by weight or more, preferably 85% by weight or more, more preferably 88% by weight or more, and most preferably 90% by weight or more.
- the weight content of the metal Pd is preferably in the range of from 0.05 to 5%, more preferably in the range of from 0.2 to 3.5%, based on the total weight of the catalyst.
- the supported palladium is concentrated in the surface layer of the supported activated carbon such that the palladium/carbon catalyst has a palladium content of 0.50 ⁇ 0.10% by weight based on the total weight of the catalyst, under the surface of the supported activated carbon.
- the metal palladium in the layer having a depth of 5 nm accounts for 30% by weight or more, preferably 40% by weight or more, more preferably 50% by weight or more based on the total atomic weight in the layer; the metal palladium in the layer having a depth of 300 nm under the surface of the supported activated carbon
- the total atomic weight in the layer is 5% by weight or more, preferably 10% by weight or more, more preferably 15% by weight or more, and most preferably 20% by weight or more.
- the supported palladium is highly dispersed on the surface of the supported activated carbon, and its dispersion is not less than 5%, preferably not less than 10%, more preferably not less than 15%, and most preferably not less than 20 %.
- the supported palladium has an average grain size of not more than 10 nm, preferably not more than 8.0 nm, more preferably not more than 7.0 nm, and most preferably not more than 6.0 nm.
- the invention provides a method of preparing a supported palladium on carbon catalyst, the method comprising the steps of:
- n, m and 1 are independently selected from 0 and an integer from 1 to 5, and R, R 2 and R 3 are independently selected from the group consisting of H, CH 3 , NH 2 , OH and COOH; pH adjustment of the palladium solution To 7 ⁇ 3; and
- the catalyst precursor is reduced with a reducing agent to obtain a supported palladium/carbon catalyst.
- the above method further comprises aging the catalyst precursor at a temperature of from 0 to 80 ° C for from 1 to 50 hours prior to subjecting the catalyst precursor to a reduction treatment.
- activated carbon used in the present invention.
- An example of activated carbon is coconut shell char having a surface area greater than 900 m 2 /g and a particle size of 4-8.
- the concentration of the aqueous mineral acid solution used in the process of the present invention may be in the range of 0.01 to 5 mol/liter, preferably in the range of 0.01 to 3.0 mol/liter.
- the inorganic acid include, but are not limited to, hydrochloric acid, nitric acid, and phosphoric acid.
- the pickling time is not critical, but is preferably in the range of 0.5 - 8, hours, more preferably in the range of 0.5 - 4 hours.
- the activated carbon is washed with the aqueous solution of the inorganic acid, washed with water until neutral, and then dried. Drying can usually be done at 80 ⁇ 150. It is dried at a temperature of C for 0.5 to 10 hours, preferably 0.5 to 6 hours.
- Pd compounds useful in the present invention include, but are not limited to, halides of Pd, Palladium acetate, palladium nitrate, chloropalladium acid, a basic salt of chloropalladium acid, a palladium ammonia complex, and combinations thereof.
- the Pd compound is chloropalladic acid or ethyl palladium acid.
- the pH of the solution containing the Pd compound and the additive is preferably in the range of 4 to 9.
- the concentration of the Pd compound in the solution in terms of Pd is preferably in the range of 0.01 to 20% by weight, more preferably in the range of 0.1 to 10% by weight, most preferably in the range of 0.2 to 3.6 % by weight.
- the amount of the additive in the Pd solution may vary depending on the Pd compound used and the additive used, but usually the molar ratio of the additive in the solution to the Pd in the Pd compound is in the range of 0.01:1 to 2:1, and the additive The molar ratio to Pd in the Pd compound is preferably in the range of 0.05:1 to 1.5:1, more preferably in the range of 0.1:1 to 1.0:1.
- reducing agents for reducing the catalyst precursor include, but are not limited to, citric acid, sodium formate, formaldehyde, hydrazine hydrate, glucose, hydrogen, and combinations thereof.
- the reducing agent is sodium formate or hydrazine hydrate.
- the amount of the reducing agent depends on the amount of the active component Pd, and is generally 1 to 10 times, preferably 2 to 5 times, the amount required for the reduction reaction theory.
- the reminder The reduction treatment of the precursor of the agent can be carried out according to procedures and conditions well known to those skilled in the art.
- the restore process can be from 0 to 200. C, preferably at a temperature of 20 to 120 ° C for 0.5 to 24 hours, preferably 1 to 10 hours, more preferably 1 to 4 hours.
- the method of preparing a supported palladium on carbon catalyst of the present invention comprises the steps of:
- the acid concentration of the aqueous acid solution is 0.01 to 3.0 moles / liter, and the acid is one selected from the group consisting of hydrochloric acid, nitric acid and phosphoric acid;
- n, m and 1 are independently 0 or any integer of 1 to 5; and, and are independently selected from the group consisting of OH, H, CH 3 , NH 2 and COOH;
- the catalyst precursor from step 3) is from 0 to 80.
- the aged catalyst precursor is subjected to a reduction treatment with a reducing agent to reduce Pd ions in the Pd compound to metal Pd to obtain a catalyst product.
- the invention Compared with the prior art, the invention has the advantages that the prepared catalyst has higher metal Pd dispersion and higher crystallite content, and the catalyst has high activity and length. The service life. detailed description
- test methods are employed:
- M Pd represents the atomic weight of palladium
- W sample represents the weight of the sample
- C Pd represents the content of palladium in the sample.
- crystallite content means the content of crystal grains having a particle diameter of less than 2.5 nm.
- the average particle diameter of the palladium crystal grains of the palladium/carbon catalyst was measured by an X-ray diffractometer (XRD).
- the catalyst was then at 500. C, in the bubble through 25. Baking in a nitrogen stream of C water After burning for 10 hours, the average particle diameter of the palladium crystal grains was measured by an X-ray diffractometer (XRD).
- XRD X-ray diffractometer
- the catalyst surface was subjected to argon etching. After etching to a certain depth, the content of palladium in the exposed surface layer was measured by photoelectron spectroscopy XPS and Auger spectroscopy AES, and the palladium content in the layer at different depths under the catalyst surface was obtained.
- coconut shell activated carbon passing through a 4-mesh sieve but remaining on an 8-mesh sieve at a surface of 1100 m 2 /g was washed with 200 ml of a 0.4 mol/liter aqueous solution of nitric acid for 2 hours. After removing the acid solution, the activated carbon was washed with deionized water until neutral, and then dried at 120 ° C for 6 hours.
- the catalyst precursor was aged at room temperature for 24 hours and then at 20 in a reducing solution prepared from 20 g of a 5% by weight aqueous hydrazine solution and 200 pure water. Immerse for 3 hours under C. After removing the liquid by filtration, the solid was washed with neutral water to neutrality and dried to obtain a catalyst product.
- Pd-containing solutions were prepared using different Pd compounds and different additives, the same as in Example 1.
- the specific Pd compound, the content of the Pd compound in the Pd-containing solution (in terms of Pd), the specific additives, and the molar ratio of the additive to Pd are listed in Table 1.
- Examples 25 to 30 According to the procedure of Example 1, but different additives were used to prepare the Pd-containing solution (see Table 1 for the specific additives used), and the Pd-containing solution was sprayed on the activated carbon to obtain a catalyst precursor, and the other uses as shown in Table 2.
- the inorganic acid, the concentration of the inorganic acid, the pickling time, the drying time, the temperature, the pH of the solution containing the additive and the Pd compound, the reducing agent, the reduction treatment temperature, and the reduction treatment time were used to prepare the Pd-containing solution (see Table 1 for the specific additives used), and the Pd-containing solution was sprayed on the activated carbon to obtain a catalyst precursor, and the other uses as shown in Table 2.
- the inorganic acid, the concentration of the inorganic acid, the pickling time, the drying time, the temperature, the pH of the solution containing the additive and the Pd compound, the reducing agent, the reduction treatment temperature, and the reduction treatment time were used to prepare the Pd-containing solution (see Table 1
- the catalysts prepared in the respective examples and comparative examples were subjected to measurement of dispersity, crystallite content, thermal stability, and palladium content in layers at different depths of the catalyst surface, and the catalysts were evaluated under the following evaluation conditions. 3 and Table 4.
- Catalyst dosage 2.0 g
- Example 1 0.50 20 90 3.5 5.9 69 99.5
- Example 2 0.50 23 91 3.6 6.0 67 99.7
- Example 3 0.20 29 90 3.4 5.3 56 89.2
- Example 4 0.08 21 92 2.7 5.3 96 ⁇
- Example 5 0.50 20 90 3.5 5.9 69 99.4
- Example 6 0.60 26
- Example 7 0.50 28 93 3.8 5.8 53 99.5
- Example 8 3.50 20 92 3.3 5.9 79 99.6
- Example 9 0.50 20 91 2.9 5.7 97 99.6
- Example 10 0.50 22 92 3.8 5.6 47 99.8
- Example 11 0.49 25 90 3.6 5.8 61 99.7
- Example 12 0.15 28 91 3.0 5.7 90 ⁇
- Example 13 0.50 20 90 3.6 5.9 64 99.5
- Example 14 0.40 21 92 3.3 5.6 70 99.5
- Example 15 0.50 26 91 3.4 5.8 71 99.8
- Example 16 0.49 25 90 3.2 5.9
- Example 1 0.50 50.2 22.3 Example 2 0.50 51.2 23.7 Example 3 0.20 43.1 11.8 Example 4 0.08 30.1 5.9 Example 5 0.50 52.6 20.4 Example 6 0.60 57.8 28.0 Example 7 0.50 60.1 23.5 Example 8 3.50 63.4 29.3 Example 9 0.50 54.3 24.2 Example 10 0.50 51.4 23.6 Example 11 0.49 50.3 23.2 Example 12 0.15 40.6 11.3 Example 13 0.50 52.3 23.7 Example 14 0.40 50.4 20.5 Example 15 0.50 52.9 24.9 Example 16 0.49 50.4 23.1 Example 17 0.50 56.3 23.0 Example 18 0.98 70.1 30.3 Example 19 0.50 57.8 23.6 Example 20 0.50 53.5 23.8 Example 21 4.48 83.2 40.2 Example 22 0.50 56.1 21.2 Example 23 0.50 50.6 24.7 Example 24 0.50 53.4 25.3 Example 25 0.50 54.5 23.0 Example 26 0.50 55.6 27.4 Example 27 0.50 56.4 23.7 Example 28 0.49 53.3 23.9 Example 29 0.50 50.1 20.1 Example 30 0.50 55.0 54.3 24.2 Example 10 0.50
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Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020097003452A KR101424042B1 (ko) | 2006-08-11 | 2007-08-02 | 지지된 팔라듐/탄소 촉매 및 그의 제조방법 |
| BRPI0714962A BRPI0714962B1 (pt) | 2006-08-11 | 2007-08-02 | catalisadores de paládio/carbono e suas preparações |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610029964.4 | 2006-08-11 | ||
| CNA2006100299644A CN101121127A (zh) | 2006-08-11 | 2006-08-11 | 负载型钯/碳催化剂的制备方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008019582A1 true WO2008019582A1 (fr) | 2008-02-21 |
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ID=38973456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2007/002322 Ceased WO2008019582A1 (fr) | 2006-08-11 | 2007-08-02 | Catalyseur pd/c supporté et son procédé de préparation |
Country Status (6)
| Country | Link |
|---|---|
| KR (1) | KR101424042B1 (zh) |
| CN (1) | CN101121127A (zh) |
| BR (1) | BRPI0714962B1 (zh) |
| DE (1) | DE102007038045B4 (zh) |
| TW (1) | TW200906484A (zh) |
| WO (1) | WO2008019582A1 (zh) |
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| CN114249660A (zh) * | 2021-12-10 | 2022-03-29 | 浙江工业大学 | 一种利用含醚键醇类衍生物的n-烷基化反应制备含醚芳胺衍生物的方法 |
| CN114425328A (zh) * | 2020-09-27 | 2022-05-03 | 中国石油化工股份有限公司 | 一种α,α-二甲基苄醇氢解催化剂及其制备方法与应用 |
| CN114931946A (zh) * | 2022-07-04 | 2022-08-23 | 上海大学 | 一种Pt/C复合催化剂及其制备方法和应用 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103120936B (zh) * | 2011-11-18 | 2015-07-08 | 中国石油化工股份有限公司 | Pd/C催化剂的制备方法 |
| CN103721706B (zh) * | 2012-10-15 | 2016-08-03 | 中国石油化工股份有限公司 | 对苯二甲酸精制钯炭催化剂还原洗涤方法 |
| CN103877974B (zh) * | 2012-12-19 | 2016-01-20 | 沈阳有色金属研究院 | 一种低载量超小尺寸选择性加氢用钯/碳催化剂的制备方法 |
| CN104549237B (zh) * | 2013-10-28 | 2017-01-18 | 中国石油化工股份有限公司 | 粗对苯二甲酸加氢精制催化剂的制备方法 |
| CN105498833B (zh) * | 2014-09-25 | 2018-08-17 | 中国石油化工股份有限公司 | 粗对苯二甲酸加氢精制催化剂及其制备方法 |
| CN107282080B (zh) * | 2016-04-12 | 2020-05-01 | 中国石油化工股份有限公司 | 粗对苯二甲酸加氢精制催化剂及其制备方法 |
| KR101950902B1 (ko) * | 2016-10-21 | 2019-02-21 | 엘티메탈 주식회사 | 수소화 반응 활성을 향상시킬 수 있는 팔라듐/탄소 촉매의 제조방법 및 이에 따라 제조된 팔라듐/탄소 촉매 |
| KR20180074286A (ko) * | 2016-12-23 | 2018-07-03 | 희성금속 주식회사 | 내구성이 향상된 팔라듐/탄소 촉매의 제조방법 및 이로부터 제조된 팔라듐/탄소 촉매 |
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| CN114669293A (zh) * | 2022-03-28 | 2022-06-28 | 易高卓新节能技术(上海)有限公司 | 用于合成碳酸二甲酯的负载型钯基催化剂及其制备方法和应用 |
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| CN114249660B (zh) * | 2021-12-10 | 2024-04-09 | 浙江工业大学 | 一种利用含醚键醇类衍生物的n-烷基化反应制备含醚芳胺衍生物的方法 |
| CN114931946A (zh) * | 2022-07-04 | 2022-08-23 | 上海大学 | 一种Pt/C复合催化剂及其制备方法和应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0714962A2 (pt) | 2013-07-30 |
| DE102007038045A1 (de) | 2008-02-28 |
| BRPI0714962B1 (pt) | 2017-04-25 |
| DE102007038045B4 (de) | 2021-05-06 |
| TWI355293B (zh) | 2012-01-01 |
| KR101424042B1 (ko) | 2014-07-28 |
| KR20090037949A (ko) | 2009-04-16 |
| TW200906484A (en) | 2009-02-16 |
| CN101121127A (zh) | 2008-02-13 |
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