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A kind of catalyst for 1,2 propanediol and preparation method thereof

A catalyst, propylene glycol technology, used in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low selectivity, low reactivity, and short catalyst activity stability. and other problems, to achieve the effects of long stability, high hydrogenolysis activity and simple preparation process

Active Publication Date: 2017-10-31
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The copper-based glycerol hydrogenolysis catalysts reported in the literature have the following problems to varying degrees: either low reactivity, low selectivity, complex catalyst system, and short stability of catalyst activity

Method used

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  • A kind of catalyst for 1,2 propanediol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 Preparation of alumina catalyst carrier

[0019] Weigh 400g of alumina (produced by Sinopec Changling Catalyst Factory), grind and dropwise add 100g of dilute nitric acid aqueous solution with a mass concentration of 10% to stir, knead, and then extrude on a extrusion machine with a plate hole diameter of 0.5mm . Bake the extruded alumina strips at 120°C for 24 hours, then roast the dried alumina strips at 540°C for 4 hours with nitrogen gas, and cut the roasted alumina into 10-20 mesh particles, which are called oxide particles. Aluminum catalyst carrier, spare.

Embodiment 2

[0020] Example 2 Preparation of 5% B 2 o 3 / Al 2 o 3 catalyst precursor

[0021] Weigh 100 g of the alumina carrier in Example 1. Weigh 8.88g of boric acid and dissolve it in 70g of distilled water to form a boric acid solution. Then add the prepared solution dropwise to the previously weighed 100g alumina carrier, stir while adding dropwise, and place it at room temperature for 8 hours after the dropwise addition is completed, then bake the alumina particles impregnated with boric acid at 120°C for 24 Hours, then bake the dried alumina strips impregnated with boric acid at 540°C for 4 hours under nitrogen to make B-containing 2 o 3 B with a mass fraction of 5% 2 o 3 / Al 2 o 3 Catalyst precursor, spare.

Embodiment 3

[0022] Example 3 Preparation of 10% B 2 o 3 / Al 2 o 3 catalyst precursor

[0023] Weigh 100 g of the alumina carrier in Example 1. Take boric acid 17.76g, be dissolved in 70g distilled water and be configured into boric acid solution. Then add the prepared solution dropwise to the previously weighed 100g alumina carrier, stir while adding dropwise, and place it at room temperature for 8 hours after the dropwise addition is completed, then bake the alumina particles impregnated with boric acid at 120°C for 24 Hours, then bake the dried alumina strips impregnated with boric acid at 540°C for 4 hours under nitrogen to make B-containing 2 o 3 B with a mass fraction of 10% 2 o 3 / Al 2 o 3 Catalyst precursor, spare.

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Abstract

The invention provides a catalyst for 1,2-propylene glycol and a preparation method thereof, wherein: the catalyst is CuO-ZnO-B2O3 / Al2O3, wherein the content of CuO is 8-15% of the mass fraction of the catalyst, and the content of ZnO is 10-30% of the mass fraction of the catalyst, B2O The content is 5-15% of the mass fraction of the catalyst, the content of the carrier alumina is 40-82% of the mass fraction of the catalyst, and the mol ratio of copper oxide to zinc oxide is 1.0:(1.0 -2.0); CuO-ZnO-B2O3 / Al2O3 The specific surface area of ​​the catalyst is 150-170m2 / g, the pore volume is 0.4-0.45ml / g, and the average pore diameter is 100±10nm. The preparation method is detailed in the instruction manual. The conversion rate of glycerol of the catalyst can reach 100%, and the selectivity of 1,2-propanediol can reach more than 97%. The invention has the advantages that the catalyst has high activity for hydrogenolysis of glycerin, the catalyst activity is stable for a long time, and the preparation process of the catalyst is simple and clean.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst for 1,2-propanediol and a preparation method thereof. technical background [0002] In recent years, with the rapid development of the biodiesel industry, the output of glycerin has increased rapidly, and the supply has exceeded demand, and the price has dropped significantly. Therefore, how to use glycerol to produce high value-added chemical products is one of the important ways to promote the healthy development of biodiesel industry. The downstream chemical products of glycerin include epichlorohydrin, glyceraldehyde, dihydroxyacetone, propylene glycol, etc. Among them, propylene glycol has a wide range of uses and a large market demand, and the technology of producing propylene glycol by hydrogenolysis of glycerol has received great attention. [0003] The key to the hydrogenolysis of glycerol to propylene glycol is the development of catalysts. There are two main categories of gly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80
Inventor 姚志龙王娟闵恩泽孙培永高俊斌尹振晏
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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