Preparation method and use of catalyst for preparation of cyclopentanone through hydrogenation of water phase furfural

A technology for preparing cyclopentanone and catalyst, which is applied to the preparation of heterocyclic compounds, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of cumbersome preparation process of carbon aerogel, collapse of molecular sieve shares, and difficult removal of carriers, etc. The operating conditions are easy to control, the industrial prospect is good, and the catalytic effect is good.

Inactive Publication Date: 2014-10-01
SOUTHEAST UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, acid dealumination or alkali desiliconization are post-treatment methods, which have many disadvantages: the process is not easy to control, and it is easy to cause the collapse of the molecular sieve stock price, and the demetallization speed is affected by the sodium content of zeolite, roasting temperatur

Method used

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  • Preparation method and use of catalyst for preparation of cyclopentanone through hydrogenation of water phase furfural
  • Preparation method and use of catalyst for preparation of cyclopentanone through hydrogenation of water phase furfural
  • Preparation method and use of catalyst for preparation of cyclopentanone through hydrogenation of water phase furfural

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preparation example Construction

[0031] A preparation method for a catalyst for the hydrogenation of furfural in aqueous phase to cyclopentanone, comprising the steps of:

[0032] Step 1. Press Na 2 O: Al 2 o 3 : SiO 2 :H 2 O molar ratio is 10~16:1:10~16:180~370, mix sodium metaaluminate, sodium hydroxide, water glass and deionized water evenly, stir for 0.5h, and age for 24~72h to obtain Y-type molecular sieve Directing agent; in the calculation of molar ratio, Na 2 The quality of O refers to the Na in the three substances of sodium hydroxide, sodium metaaluminate and water glass. 2 Sum of O, Al 2 o 3 The quality refers to the Al in sodium metaaluminate 2 o 3 mass of SiO 2 The mass refers to SiO in water glass 2 mass, H 2 The mass of O refers to the H in water glass and deionized water 2 The sum of O; wherein, the molar weight of Al in sodium metaaluminate is expressed as Al 2 o 3 In terms of, the molar amount of Na is expressed as Na 2 In terms of O; the molar weight of Na in sodium hydroxid...

Embodiment 1

[0041] (1) Mix 0.68g of sodium metaaluminate, 3.68g of sodium hydroxide, 14.86g of water glass and 18mL of deionized water evenly, stir for 0.5h and then age at room temperature for 24h to obtain a Y-type molecular sieve directing agent.

[0042] (2) Dissolve 3.11g of sodium metaaluminate in 58mL of deionized water, add 1.94g of sodium hydroxide, then slowly add 32.51g of water glass dropwise, then add 0.9g of 3-aminopropyltriethoxysilane and 9.31g of step (1) The prepared Y-type molecular sieve directing agent was stirred at room temperature for 3 hours to obtain an aluminosilicate gel.

[0043] (3) Put the obtained aluminosilicate gel into a hydrothermal kettle for crystallization at 90° C. for 15 hours. After the crystallization, the solid product was suction filtered, washed and dried, and then calcined in a muffle furnace at 550° C. for 5 hours to remove the mesoporous template agent to obtain a multi-stage Y-type molecular sieve.

[0044] (4) the obtained multi-stage po...

Embodiment 2

[0047] (1) Mix 0.89g of sodium metaaluminate, 2.65g of sodium hydroxide, 18.22g of water glass and 15mL of deionized water evenly, stir for 0.5h and then age at room temperature for 36h to obtain a Y-type molecular sieve directing agent.

[0048] (2) Dissolve 1.46g of sodium metaaluminate in 34mL of deionized water, add 1.528g of sodium hydroxide, then slowly add 18.99g of water glass dropwise, then add 1.6g of sodium alginate and 7.35g of sodium alginate prepared in step (1) Y-type molecular sieve guide agent, stirred at room temperature for 3 hours to obtain aluminosilicate gel.

[0049] (3) Put the obtained aluminosilicate gel into a hydrothermal kettle for crystallization at 110° C. for 20 h. After the crystallization, the solid product was suction filtered, washed and dried, and then calcined in a muffle furnace at 550° C. for 5 hours to remove the mesoporous template agent to obtain a hierarchically porous Y molecular sieve.

[0050] (4) the obtained multi-stage porous ...

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Abstract

The invention discloses a preparation method of a catalyst for preparation of cyclopentanone through hydrogenation of water phase furfural. The preparation method comprises the following steps: firstly, performing in situ synthesis of a hierarchical pore Y-type molecular sieve carrier by using a one-step hydrothermal crystallization process, and then preparing a molecular sieve loaded type catalyst by using a dipping process. The invention further discloses a method for preparing cyclopentanone through hydrogenation of water phase furfural in the presence of the catalyst. The method disclosed by the invention is simple in steps; and operation conditions are easily controlled. The synthesized hierarchical pore Y-type molecular sieve is relatively high in crystallization degree, contains micropores and mesopores, and also is large in specific surface area. The catalyst prepared by using the molecular sieve has a developed hierarchical pore structure to ensure that a reactant is quickly diffused and transferred; carbon deposition is not easily formed on the surface of the catalyst, and meanwhile, the side effects are reduced. Compared with a catalyst prepared by using a conventional molecular sieve, the catalyst has the advantages of remarkably increasing the reaction rate, increasing the yield of a target product, and being or in catalysis effect, and better in industrial prospect.

Description

technical field [0001] The invention relates to the technical field of molecular sieve-supported catalysts, in particular to a preparation method and application of a catalyst for hydrogenating furfural in aqueous phase to prepare cyclopentanone. Background technique [0002] Cyclopentanone is an important fine chemical intermediate, and it is a raw material for the preparation of new spices such as methyl dihydrojasmonate and brandyne, and the anxiolytic drug buspirone. Because of its good solubility to various resins, it is widely used as a solvent in the electronics industry. There are many synthetic methods of cyclopentanone. The traditional synthesis of cyclopentanone is the cyclization of adipic acid under the action of a catalyst to synthesize cyclopentanone. The method uses acids to react, which has a corrosive effect on equipment, and cyclopentanone is easy to polymerize in the reaction process. In recent years, with C 5 The research on the production of cyclopen...

Claims

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Application Information

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IPC IPC(8): B01J29/14B01J29/12B01J35/10C07C49/395C07C45/59
Inventor 魏瑞平刘传英肖国民高李璟周铭昊耿高丽
Owner SOUTHEAST UNIV
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