Non-noble metal catalyst for preparing succinic anhydride by liquid-phase continuous hydrogenation of maleic anhydride and preparation method of non-noble metal catalyst

A technology of succinic anhydride and non-precious metals, which is applied in the field of non-precious metal catalysts and their preparation, can solve the problems of unsatisfactory market demand, large solvent circulation, high catalyst cost, etc., and achieves accelerated hydrogenation reaction rate, simple preparation process, and improved The effect of reduction

Pending Publication Date: 2022-04-08
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the implementation of the plastic ban, it is estimated that the market demand for succinic anhydride in my country will exceed 2 million tons per year in the future. At present, the domestic production capacity of succinic anhydride is less than 50,000 tons, which cannot meet the market demand. The limited production capacity of succinic anhydride has become a bottleneck for the development of the PBS industry. bottleneck
The method has the disadvantages of low processing amount of maleic anhydride, large amount of solvent circulation, high energy consumption, and high separation cost.
[0007] Patents SU1541210, Ru2058311, and EP0691335 disclose a method for preparing succinic anhydride by one-step hydrogenation of maleic anhydride in the presence of a solvent. The catalyst used is noble metal Pd, and the noble metal content is as high as 2-10 wt%. The cost of the catalyst is relatively high

Method used

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  • Non-noble metal catalyst for preparing succinic anhydride by liquid-phase continuous hydrogenation of maleic anhydride and preparation method of non-noble metal catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Take 38.9g nickel nitrate hexahydrate, 12.1g copper nitrate trihydrate, 2.2g potassium nitrate, 4.7g citric acid and 5.5g nitric acid and add water to prepare 190ml active metal colloid solution, weigh 156g pseudo-boehmite on a dry basis Mix evenly with 6.2g of scallop powder, add active metal colloid solution, knead, extrude, and cut into pellets to obtain wet carrier; firstly cure the wet carrier for 12 hours, then dry it in an oven at 120°C for 4 hours, and finally place it in a muffle furnace Calcined at a constant temperature of 500°C for 4 hours to obtain a support containing nickel-copper active components.

[0035] 2. Take 116.8g of nickel nitrate hexahydrate and 2.7g of lanthanum nitrate hexahydrate and add water to prepare an impregnating solution, spray the impregnating solution evenly on the above-mentioned carrier by equal volume method, first dry it naturally, then dry it in an oven at 120°C for 4 hours, and finally Placed in a muffle furnace at a const...

Embodiment 2

[0038] 1. Take 54.5g of nickel nitrate hexahydrate, 24.3g of copper nitrate trihydrate, 12.7g of magnesium nitrate hexahydrate, 4.7g of citric acid and 5.5g of nitric acid and add water to prepare 172ml of active metal colloid solution, and weigh 140g of pseudo thin water on a dry basis Mix bauxite and 6.2g squat powder evenly, add active metal colloid solution, knead, extrude, and cut into pellets to get wet carrier; wet carrier is first cured for 12 hours, then dried in an oven at 120°C for 4 hours, and finally placed in a muffle Roasting at a constant temperature of 550° C. for 4 hours in a furnace to obtain a carrier containing nickel-copper active components.

[0039] 2. Take 140.1g of nickel nitrate hexahydrate and 2.5g of cerium nitrate hexahydrate and add water to prepare the impregnating solution. Spray the impregnating solution evenly on the above-mentioned carrier by equal volume method, first dry it naturally, then dry it in an oven at 120°C for 4 hours, and finally...

Embodiment 3

[0042] 1. Take 54.5g of nickel nitrate hexahydrate, 24.3g of copper nitrate trihydrate, 8.4g of calcium nitrate tetrahydrate, 4.7g of citric acid and 5.5g of nitric acid and add water to prepare 172ml of active metal colloid solution, and weigh 140g of pseudo-thin water on a dry basis Mix bauxite and 6.2g squat powder evenly, add active metal colloid solution, knead, extrude, and cut into pellets to get wet carrier; wet carrier is first cured for 12 hours, then dried in an oven at 120°C for 4 hours, and finally placed in a muffle Roasting at a constant temperature of 550° C. for 4 hours in a furnace to obtain a carrier containing nickel-copper active components.

[0043] 2. Take 140.1g of nickel nitrate hexahydrate, 1.3g of cerium nitrate hexahydrate and 1.4g of lanthanum nitrate hexahydrate and add water to prepare the impregnating solution. Spray the impregnating solution evenly on the above-mentioned carrier by equal volume method, first dry it naturally, and then put it in ...

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Abstract

The invention provides a non-noble metal catalyst for preparing butanedioic anhydride through maleic anhydride liquid-phase continuous hydrogenation. A catalyst carrier is prepared by mixing, kneading and forming a copper precursor, a part of a nickel precursor, a colloidal solution of a first auxiliary agent and pseudo-boehmite powder, and then drying and roasting to prepare a carrier containing active metal. And then loading the residual active metal nickel and a second auxiliary agent by adopting an equivalent-volume impregnation method to prepare the catalyst. The catalyst comprises the following components in percentage by weight (in terms of oxide): 20%-30% of nickel oxide, 2%-5% of copper oxide, 0.1%-5.0% of a first aid, 0.1%-2.0% of a second aid and the balance of aluminum oxide. The catalyst has the advantages of simple preparation process, easiness in industrial production, wide reaction temperature range, high activity, high selectivity and high stability, and can be used for treating high-concentration and high-airspeed materials.

Description

technical field [0001] The invention relates to a non-precious metal catalyst for preparing succinic anhydride by liquid-phase continuous hydrogenation of maleic anhydride and a preparation method thereof. Background technique [0002] Succinic anhydride, also known as succinic anhydride, is widely used in food processing, medicine and health, agriculture and other industries. The most promising market is as an important raw material for the synthesis of degradable polyester PBS. With the implementation of the plastic ban, it is estimated that the market demand for succinic anhydride in my country will exceed 2 million tons per year in the future. At present, the domestic production capacity of succinic anhydride is less than 50,000 tons, which cannot meet the market demand. The limited production capacity of succinic anhydride has become a bottleneck for the development of the PBS industry. bottleneck. [0003] At present, the production processes of succinic anhydride at h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C07D307/60
CPCY02P20/584
Inventor 宋国良张景成肖寒许岩张尚强张国辉朱金剑张玉婷陈永生孙彦民
Owner CHINA NAT OFFSHORE OIL CORP
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