Catalyst of succinic acid dicarboxylic ester and preparation method thereof

A technology of succinic acid dicarboxylate and catalyst, which is applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of easy deactivation, equipment corrosion, many side reactions, etc. Active, easy-to-operate, low-cost effects

Active Publication Date: 2011-02-23
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the strong oxidizing properties of concentrated sulfuric acid, this process has many side reactions, which makes the product color darker, the yield is low, the post-treatment is complicated, the equipment is severely corroded, and the by-products seriously pollute the environment.
[0004] Patent CN101745396A discloses a catalyst for preparing dialkyl succinate by hydrogenation of dialkyl maleate. The catalyst used is a copper-zinc catalyst. Due to the poor thermal shock performance of the copper-zinc catalyst, especially for carbon-carbon double bonds For strong exothermic reactions such as hydrogenation, the stability of the catalyst is poor, the life is short, and it is easy to deactivate, and copper-based catalysts are the most commonly used carbonyl hydrogenation catalysts, which can easily generate 1,4-butanediol, γ- Butyrolactone, tetrahydrofuran and other by-products, hydrogenation products need to be separated and purified to obtain qualified products

Method used

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  • Catalyst of succinic acid dicarboxylic ester and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 10.0gNi(NO 3 ) 2 ·6H 2 O, 0.14gNaNO 3 Make a mixed solution with deionized water, add the prepared solution to 17.9gAl 2 o 3 The carrier is impregnated with a medium volume, dried at 100°C for 36 hours, and calcined at 450°C for 3 hours to obtain the desired catalyst. The obtained catalyst was loaded into a fixed bed reactor, and the catalyst was reduced under hydrogen at 400°C for 5h, the reaction temperature was 120°C, the pressure was 1MPa, the molar ratio of hydrogen to oil was 50, and the LHSV was 0.5h -1 , and the results are shown in Table 1.

Embodiment 2

[0019] Take 12.7gNiCl 2 ·6H 2 O, 0.21g KNO 3 Make a mixed solution with deionized water, add the prepared solution to 15.8gAl 2 o 3 The carrier is impregnated with a medium volume, dried at 150°C for 6h, and calcined at 350°C for 12h to obtain the desired catalyst. The obtained catalyst was loaded into a fixed bed reactor, and the catalyst was reduced under hydrogen at 400°C for 5h, the reaction temperature was 120°C, the pressure was 1MPa, the molar ratio of hydrogen to oil was 50, and the LHSV was 0.5h -1 , and the results are shown in Table 1.

Embodiment 3

[0021] Take 5.0gNi(NO 3 ) 2 ·6H 2 O, 0.42gCa(NO 3 ) 2 Make a mixed solution with deionized water, add the prepared solution to 19.0gAl 2 o 3 The carrier is impregnated with a medium volume, dried at 130°C for 12 hours, and calcined at 400°C for 8 hours to obtain the desired catalyst. The obtained catalyst was loaded into a fixed bed reactor, and the catalyst was reduced under hydrogen at 400°C for 5h, the reaction temperature was 120°C, the pressure was 1MPa, the molar ratio of hydrogen to oil was 50, and the LHSV was 0.5h -1 , and the results are shown in Table 1.

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Abstract

The invention discloses a catalyst of succinic acid dicarboxylic ester. The catalyst consists of the following components in percentage by weight: 5 to 25 percent of nickel serving as an active ingredient, 0.5 to 8 percent of aid and the balance of carrier, wherein the carrier is alumina, silicon oxide, silicon-aluminum composite oxide or active carbon; and the aid is one of Na, K, Ca, Mg, Mn, Ba or Cu. The catalyst is prepared by an immersion method. The catalyst has the advantages of high heat stability, high activity and high selectivity.

Description

technical field [0001] The invention relates to a catalyst for succinic acid dicarboxylate and a preparation method thereof. technical background [0002] Succinic acid dicarboxylate is an important synthetic spice, food additive, organic solvent, and also an intermediate in organic synthesis and pharmaceutical synthesis. It is widely used in food, spice, daily chemical, pharmaceutical, coating, rubber, plastic and other industries . Especially in recent years, due to the enhanced awareness of environmental protection, green environmental protection products are favored by people. Environmentally friendly coatings with succinic acid dicarboxylate as solvent and pigments (such as quinacridone pigments) prepared with it as intermediates ), will have a broad market prospect, which will drive the demand for succinic acid dicarboxylate. [0003] At present, the preparation method of succinic acid dicarboxylate is mainly based on succinic acid and corresponding C 1 -C 5 Alcoho...

Claims

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Application Information

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IPC IPC(8): B01J23/755C07C69/40B01J23/889C07C67/303
Inventor 李学宽唐明兴吕占军齐永琴周立功杜明仙葛晖
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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