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Prehydrogenation catalyst for preparing 1,4-butanediol, its preparation method and application

A catalyst, pre-hydrogenation technology, used in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. Problems such as powdering

Active Publication Date: 2018-10-02
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the copper-based catalysts in the prior art are used in the process of preparing 1,4-butanediol by the hydrogenation of dimethyl succinate prepared by biological methods, and there are defects such as catalyst poisoning and fragmentation. There is a small amount of by-product impurity formic acid and acetic acid in the process of preparing dimethyl succinate raw material succinic acid
On the other hand, in the process of succinate esterification, there is a small amount of incompletely esterified monomethyl succinate impurity
These carboxylic acid impurities firmly adhere to the surface of the catalyst or react with the catalyst, leading to catalyst poisoning or catalyst pulverization, resulting in a decrease in the conversion rate of raw materials or an increase in the pressure drop of the reactor bed, and an increase in power consumption

Method used

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  • Prehydrogenation catalyst for preparing 1,4-butanediol, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The prehydrogenation catalyst, the Al 2 o 3 Three types of Al with particle diameters of 200-500 μm, 50-200 μm, and 10-50 μm 2 o 3 The gradation of the powder is conducive to improving the pore volume of the catalyst, especially the pore volume of large pores with a pore diameter between 100 and 1000 nm; the preparation method of the prehydrogenation catalyst comprises the following steps:

[0020] (1) According to the mass ratio of 50-70:10-20:10-40, respectively weigh three kinds of Al with particle diameters ranging from 200-500 μm, 50-200 μm, and 10-50 μm 2 o 3 powder; then weighed Al 2 o 3 The total mass of the powder is 2% of the binder hydroxypropyl methylcellulose, and mixed evenly to obtain material Ⅰ;

[0021] (2) adding an aqueous solution containing an alkali metal oxide precursor to the material I, kneading and extruding into strips, drying and roasting to obtain the material II;

[0022] (3) The material II is impregnated with an aqueous solution co...

Embodiment 1

[0034] Catalyst preparation:

[0035] (1) According to the ratio of mass ratio of 50:10:40, respectively weigh Al with particle diameter ranges of 200-500 μm, 50-200 μm, and 10-50 μm 2 o 3 powder; then weighed Al 2 o 3 The total mass of the powder is 2% of the binder hydroxypropyl methylcellulose, and mixed evenly to obtain material Ⅰ;

[0036] (2) Add an aqueous solution containing KOH to the material I, knead and extrude into strips with a diameter of 2mm, dry at 100°C for 10 hours, and roast at 600°C for 4 hours to obtain material II;

[0037] (3) The material II was impregnated with an aqueous solution containing copper nitrate, dried at 100°C for 10 hours, and calcined at 400°C for 4 hours to obtain the catalyst of this example.

[0038] The composition, pore volume, and ratio of macropore (100-1000 nm) pore volume of the catalyst obtained in this example are shown in Table 1.

[0039] Catalyst evaluation:

[0040] In addition to dimethyl succinate, the dimethyl suc...

Embodiment 2

[0043] Catalyst preparation:

[0044] (1) According to the ratio of mass ratio of 70:20:10, respectively weigh Al with particle diameters ranging from 200 to 500 μm, 50 to 200 μm, and 10 to 50 μm 2 o 3 powder; then weighed Al 2 o 3 The total mass of the powder is 2% of the binder hydroxypropyl methylcellulose, and mixed evenly to obtain material Ⅰ;

[0045] (2) Add KNO containing KNO to material Ⅰ 3 After kneading, it was extruded into strips with a diameter of 2mm, dried at 100°C for 10 hours, and roasted at 600°C for 4 hours to obtain material II;

[0046] (3) The material II was impregnated with an aqueous solution containing copper acetate, dried at 100°C for 10 hours, and calcined at 400°C for 4 hours to obtain the catalyst of this example.

[0047] The composition, pore volume, and ratio of macropore (100-1000 nm) pore volume of the catalyst obtained in this example are shown in Table 1.

[0048] Catalyst evaluation:

[0049] In addition to dimethyl succinate, the...

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Abstract

The invention discloses a dimethyl succinate pre-hydrogenation catalyst for preparing 1,4-butanediol, a preparation method and application thereof. The catalyst provided by the invention can be used for effectively removing few amount of impurities, such as formic acid, acetic acid and dimethyl succinate existing in the process of preparing succinic acid in dimethyl succinate through a fermentation method and the catalyst poisoning and breaking can be prevented.

Description

technical field [0001] The invention belongs to the technical field of hydrogenation refining of biochemical products, and more specifically relates to a prehydrogenation catalyst used for hydrogenation of dimethyl succinate to prepare 1,4-butanediol and a preparation method thereof. Background technique [0002] 1,4-Butanediol is an important basic organic chemical and fine chemical raw material, widely used in solvents, medicines, cosmetics, plasticizers, curing agents, pesticides, herbicides, artificial leather, fibers, engineering plastics and other fields , which is also the basic raw material for the production of tetrahydrofuran (THF), γ-butyrolactone (GBL), N-methylpyrrolidone (NMP), polyurethane elastomers and other products. The current global market demand for 1,4-butanediol is 1.3 million tons per year. [0003] At present, the production of 1,4-butanediol and succinic acid is based on non-renewable petroleum raw materials. The production process consumes a lot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78C07C29/149C07C31/20
CPCB01J23/002B01J23/78B01J2523/00C07C29/149B01J2523/13B01J2523/17B01J2523/31B01J2523/12C07C31/207
Inventor 王继元刘波堵文斌杨爱武柏基业刘建新
Owner SINOPEC YANGZI PETROCHEM
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