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Method for preparing catalyst for preparing 1,4-cis-butanediol by dimethyl maleate hydrogenation

A technology of dimethyl maleate and catalyst, applied in the chemical industry, can solve the problems such as easy drop of catalyst activity, and achieve the effects of simple preparation method, high activity and convenient process realization.

Inactive Publication Date: 2007-03-28
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently used Cu-based catalysts (Cu / ZnO / Al 2 o 3 or Cu / ZnO, etc.), because the active component metal copper is easy to agglomerate, so the catalyst activity is easy to decrease

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: Cu / MCM-41-1 catalyst

[0016] At room temperature, 5.528g CTAB was dissolved in 440ml of water, stirred for 4h, then continued to add 31ml of ammonia water, continued to stir for 5h, then added 26ml of TEOS, stirred for 3h, filtered, washed 3 times with distilled water, dried at 90°C, and roasted at 550°C for 5h to obtain MCM -41 carrier.

[0017] 10.0g Cu(NO 3 ) 2 ·3H 2 O dissolved in 50ml H 2 O was made into a metal ion solution, and 4g of MCM-41 with a pore size of 10nm was added under stirring, evaporated to dryness at 60°C, baked at 120°C for 12h, and baked in a muffle furnace at 10K / min to 450°C for 4h.

[0018] Granulate the catalyst powder to 40-60 mesh, and use H 2 / N 2 The activity test is carried out after the mixture is reduced. The results of selective hydrogenation are shown in Table 1.

Embodiment 2

[0019] Embodiment 2: Cu / MCM-41-2 catalyst

[0020] 5.0g Cu(NO 3 ) 2 ·3H 2 O dissolved in 50ml H 2 O was made into a metal ion solution, and 4.5 g of commercially available MCM-41 with a pore size of 3nm was added under stirring, evaporated to dryness at 60°C, baked at 120°C for 12 hours, and baked in a muffle furnace at 10K / min to 450°C for 4 hours.

[0021] Granulate the catalyst powder to 40-60 mesh, and use H 2 The activity test was carried out after reduction of the / Ar mixture. The results of selective hydrogenation are shown in Table 2.

Embodiment 3

[0022] Embodiment 3: Cu / MCM-41-3 catalyst

[0023] 7.5g Cu(NO 3 ) 2 ·3H 2 O dissolved in 105ml H 2 O was made into a metal ion solution, and 4.0 g of MCM-41 of Example 1 was added under stirring, evaporated to dryness at 90°C, baked at 120°C for 12 hours, and then heated to 550°C for 4 hours in a muffle furnace at 10K / min.

[0024] Granulate the catalyst powder to 40-60 mesh, and use H 2 The activity test was carried out after reduction of the / Ar mixture. Selective hydrogenation results are shown in Table 3

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Abstract

The present invention belongs to the field of chemical engineering technology. It relates to a new catalyst for preparing 1,4-butanediol by utilizing hydrogenation of dimethyl maleate. Said invention uses mesopore molecular sieve MCM-41 as carrier and impregnates it with Cu salt solution to prepare catalyst precursor, then the precursor is calcined so as to obtain the invented Cu / MCM41 catalyst. Said catalyst has higher activity and higher 1,4-butanediol selectivity.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a method for preparing a catalyst for hydrogenating dimethyl maleate to prepare 1,4-butanediol. Background technique [0002] 1,4-Butanediol is an important basic organic synthetic raw material that has developed rapidly in recent years. Due to the longer carbon chain, the polyester or polyurethane synthesized from it has more balanced physical properties than the polymer synthesized from ethylene glycol or propylene glycol. 1,4-Butanediol is widely used, and it mainly has 3 product chains: 1. Production of tetrahydrofuran (referred to as THF), tetrahydrofuran undergoes ring-opening polymerization to produce polytetramethylene ether glycol (abbreviated as PTMEG), pharmaceutical intermediate 2. Production of γ-butyrolactone (abbreviated as GBL), and γ-butyrolactone is further reacted with acetylene to generate 2-pyrrolidone, vinylpyrrolidone and polyvinylpyrrolidone; 3. P...

Claims

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Application Information

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IPC IPC(8): B01J29/76C07C31/20C07C29/149
Inventor 陈梁峰沈伟乔明华范康年徐华龙
Owner FUDAN UNIV
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