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High carbon polyol hydrocracking catalyst and preparing process and application thereof

A hydrocracking and catalyst technology, applied in the direction of catalyst activation/preparation, Raney-type catalysts, chemical instruments and methods, etc., can solve the problems of easy corrosion and dissolution, difficult molding, easy methanation, etc., and achieve high physical stability and chemical stability, good activity and selectivity, simple preparation process

Inactive Publication Date: 2008-06-18
马波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, activated carbon loaded with metals is prone to methanation under high-pressure hydrogen and high temperature, which restricts the long-term effectiveness of activated carbon as a carrier; while α-Al 2 o 3 、TiO 2 (rutile), ZrO 2 (Monoclinic) As a carrier with a small surface area, it is difficult to improve the catalyst activity, and TiO 2 (rutile) is difficult to form and the price is higher
[0007] Traditional metal catalysts supported by commonly used carriers such as alumina and silica are easily corroded and dissolved under alkaline conditions in the aqueous phase, which affects the strength and life of the catalyst, and the active components are easy to fall off and aggregate, and the pH value of the system Strict control requirements restrict the large-scale industrial application of such catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of Catalyst 1:

[0043] Put 100g of metal aluminum in the crucible, heat and melt it with an electric furnace, add 98g of metal nickel and 2g of metal antimony at about 1000°C, stir with a graphite rod at 1200-1300°C and keep it for 20-30 minutes, then pour out, cool, Crushed and ball milled, it becomes Catalyst A. Alkaline solution was used to remove aluminum, 1.5L of 20% sodium hydroxide was added to 500g of catalyst, kept at 80°C for 2 hours, and then washed with deionized water until pH = 7.5.

[0044] Catalyst 1 for sorbitol hydrocracking reaction

[0045] 24g of catalyst A, 300ml of 25% sorbitol, and 2g of sodium hydroxide were placed in a 500ml autoclave, and after being replaced with nitrogen and hydrogen successively, the temperature was raised to 200°C, and the hydrogen pressure was maintained at 12Mpa. Reaction for 7 hours, sorbitol concentration 3.74%, ethylene glycol concentration 1.82%, propylene glycol concentration 4.15%, 1,4-butanediol con...

Embodiment 2

[0047] Preparation of Catalyst 2:

[0048] The preparation method of catalyst 2 is the same as in Example 1, and the added metals are 100g of metallic aluminum, 80g of metallic nickel, 19g of metallic copper and 1g of metallic iron.

[0049] Catalyst 2 for sorbitol hydrocracking reaction

[0050] Put 15g of catalyst 2, 300ml of 25% sorbitol, and 3g of sodium hydroxide in a 500ml autoclave, replace with nitrogen and hydrogen successively, raise the temperature to 220°C, and keep the hydrogen pressure at 12Mpa. Reaction for 9 hours, sorbitol concentration 0.15%, ethylene glycol concentration 2.57%, propylene glycol concentration 8.20%, 1,4-butanediol concentration 0.25%, 1,2-butanediol concentration 0.87%, methanol concentration 0.33%, ethanol concentration The concentration is 0.43%, the concentration of propanol is 0.09%, the concentration of formic acid is 0.97%, the concentration of acetic acid is 1.98%, and the concentration of lactic acid is 0.87%.

Embodiment 3

[0052] Preparation of Catalyst 3:

[0053] The preparation method of catalyst 3 is the same as that in Example 1, and the added metals are 100g of metallic aluminum, 90g of metallic nickel, and 10g of metallic tin.

[0054] Catalyst 3 for sorbitol hydrocracking reaction

[0055] Put 30g of catalyst 3, 300ml of 25% sorbitol, and 1g of sodium hydroxide in a 500ml autoclave, replace with nitrogen and hydrogen successively, raise the temperature to 215°C, and keep the hydrogen pressure at 10Mpa. Reaction for 10 hours, sorbitol concentration 2.73%, ethylene glycol concentration 2.84%, propylene glycol concentration 7.80%, 1,4-butanediol concentration 0.17%, 1,2-butanediol concentration 0.85%, methanol concentration 0.27%, ethanol concentration The concentration is 0.21%, the concentration of propanol is 0.05%, the concentration of formic acid is 1.12%, the concentration of acetic acid is 2.05%, and the concentration of lactic acid is 1.30%.

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PUM

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Abstract

The invention discloses a novel longevity-type catalyst with high activity and selectivity of high alcohol hydrogenation and chemical stability and physical stability under reacting condition, the preparation method and the application. The catalyst of the invention adopts metal as the catalyst framework, so that the hydrothermal stability and alkali tolerance of the catalyst are high. The catalyst can be prepared by the melting method, the machine-alloying method and the chemical synthesis method. The invention can be used for high alcohol hydrogenation, in particular for the preparation of hydrogenation low-carbon polyatomic alcohol by using regenerated material as D-sorbitol which is made from corn.

Description

technical field [0001] The invention relates to a high-carbon polyol hydrocracking catalyst, its preparation method and application, specifically, the catalyst can be used to prepare low-carbon polyols by hydrocracking high-carbon polyols such as sorbitol obtained from renewable raw materials catalyst, wherein said low-carbon polyols are low-carbon polyols such as ethylene glycol, propylene glycol, glycerol, butanediol, pentanediol or various isomers thereof, or any two or more of them A multi-component low-carbon polyol mixture composed of two low-carbon polyols. Background technique [0002] Low-carbon polyols such as ethylene glycol, propylene glycol, glycerol, and butanediol are widely used in petrochemicals, and can be used in the production of polyester materials, antifreeze, lubricants, plasticizers, surfactants, etc. raw material. For a long time, the industrial production methods and synthetic raw materials of low-carbon polyols have relied on petroleum resources....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/76B01J25/02C07C29/00
CPCC07C29/00B01J25/00B01J37/0201B01J25/02C07C29/60Y02P20/52
Inventor 刘菁徐杰
Owner 马波
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