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Supported catalyst as well as preparation method and application thereof

A supported catalyst and carrier technology, applied in chemical instruments and methods, physical/chemical process catalysts, preparation of hydroxyl groups, etc., can solve the problems of low conversion efficiency and high equipment requirements, and achieve the effect of improving selectivity

Pending Publication Date: 2021-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, there have been related researches on the use of non-precious metals such as cobalt, copper, molybdenum and manganese as catalysts. Since no precious metals are used, the cost can be reduced, but the conversion efficiency of the reaction is low or the reaction needs to be carried out under high pressure, which requires high equipment requirements.

Method used

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  • Supported catalyst as well as preparation method and application thereof
  • Supported catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Catalyst preparation:

[0030] 2.35g of chloroplatinic acid solution with a platinum content of 1.1% and 5ml of an aqueous solution containing 0.79g of sodium tungstate were fully stirred and mixed evenly. Commercial manganese oxide was selected as the carrier, and 19.5g of manganese oxide was mixed with the above solution. Vacuum on the instrument at 60°C for 1h until the solution is completely dry, then dry the solid product at 120°C overnight and roast at 400°C for 4h to obtain a composition of 0.1%Pt-2%WO 3 / MnO Catalyst A1.

Embodiment 2

[0032] Catalyst A2 was prepared in the same steps as in Example 1, except that commercially available manganese dioxide was selected as the carrier. Catalyst A2 composition 0.2%Pt-2%WO 3 / MnO 2 .

Embodiment 3

[0034] Catalyst preparation:

[0035] Mix 250ml of 5.5mol / L NaOH solution with 0.5mol / L MnCl 2 200ml of the solution was quickly mixed, and an appropriate amount of chloroplatinic acid and zinc nitrate solution was added to the mixed solution to obtain a mixed solution. Oxygen was passed into the mixed solution at a flow rate of 50L / h, and the solution was continuously stirred. After 4 hours of reaction, the reaction solution was deionized Suction filtration of water until the pH value of the solution is 7.0-7.5, and drying at 120°C to obtain catalyst A3, the composition of which is 0.1%Pt-2%Zn-δ-MnO 2 .

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Abstract

The invention discloses a supported catalyst, which comprises a carrier and active components, wherein the carrier is a manganese oxide or a manganese oxide molecular sieve, the active components comprise a first active component and a second active component, the first active component is one or more of group VIII metals, and the second active component is one or more oxides of W, Cu, Zn, Ni and Fe. The invention also discloses a preparation method of the supported catalyst. The catalyst provided by the invention takes the manganese oxide or the molecular sieve as a carrier, is loaded with specific active components, is particularly suitable for catalyzing direct hydrogenation reaction of glycerol, and can obviously improve the selectivity of a target product. Furthermore, the content of the active metal with high cost is low, so that the catalyst is more economical.

Description

technical field [0001] The invention belongs to the field of organic chemical synthesis catalysts, and in particular relates to supported catalysts and their preparation methods and applications. Background technique [0002] Glycerol is the main by-product of biodiesel production. Currently, glycerin on the market mainly comes from the biodiesel and oil industries. With the continuous increase of biodiesel production, the current glycerin market is basically saturated, and the supply is obviously oversupplied, which keeps the price of glycerin stable at a low level. Propylene glycol (PG) is mainly used to produce coatings and unsaturated polyester resins (UPR). In addition, it is used as an antifreeze agent to replace ethylene glycol for antifreeze aircraft and as a coolant in food. In addition, a large amount of propylene glycol is used in the production of plasticizers and hydraulic brake fluids. It can also be used in non-ionic detergents and as a humectant in pharmace...

Claims

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Application Information

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IPC IPC(8): B01J23/656B01J23/89C07C31/20C07C29/60
CPCB01J23/6562B01J23/8986C07C29/60
Inventor 晋超刘锋褚阳翟维明
Owner CHINA PETROLEUM & CHEM CORP