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The synthetic method of diisopropyl succinate

A technology of diisopropyl succinate and a synthesis method is applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., and can solve the problems of high cost, low yield of diisopropyl succinate, The problem of high process cost, to achieve the effect of simple preparation, high reaction yield and high product purity

Active Publication Date: 2020-05-08
黑龙江邦普生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the yield of the catalytic synthesis of diisopropyl succinate of the ionic liquid is low, only 82.8%, and the cost of the ionic liquid is higher, so that the overall process cost is high

Method used

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  • The synthetic method of diisopropyl succinate
  • The synthetic method of diisopropyl succinate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1SO 4 2- / SnO 2 Preparation of Nano Solid Superacid

[0027] Disperse 100 g of crystalline tin tetrachloride in 300 ml of ethanol, stir, add ammonia solution dropwise, and control the pH=6.0 to obtain Sn(OH) 4 Sol, gelled in a water bath at 70°C for 15 hours to obtain SnO 2 gel, the SnO 2 The gel was dried at 100°C for 15h, soaked in sulfuric acid with a concentration of 3mol / L for 2.5h, filtered with suction, dried at 100°C, calcined at 600°C for 3h, and prepared into a gel with an average particle size of 50nm using a superfine pulverizer after cooling. SO 4 2- / SnO 2 Nano solid superacid catalyst.

Embodiment 2

[0028] Example 2SO 4 2- / TiO 2 Preparation of Nano Solid Superacid

[0029] Disperse 100 g of titanium tetrachloride in 300 ml of ethanol, stir, add ammonia solution dropwise, and control the pH=6.0 to obtain Ti(OH) 4 Sol, gelled in a water bath at 70°C for 15 hours to obtain TiO 2 gel, the TiO 2 The gel was dried at 100°C for 15h, soaked in sulfuric acid with a concentration of 3mol / L for 2.5h, filtered with suction, dried at 100°C, calcined at 600°C for 3h, and prepared into a gel with an average particle size of 50nm using a superfine pulverizer after cooling. SO 4 2- / SnO 2 Nano solid superacid catalyst.

Embodiment 3

[0030] Example 3SO 4 2- / SnO 2 -CeO 2 Preparation of Nano Solid Superacid

[0031] Disperse 100 g of crystalline tin tetrachloride in 300 ml of ethanol, stir, add ammonia solution dropwise, and control the pH=6.0 to obtain Sn(OH) 4 Sol, take 51.7g of cerium sulfate tetrahydrate and disperse in 20ml of water, add 1g of polyethylene glycol, dropwise add ammonia solution to pH=10, and mix it with Sn(OH)4 The sol was mixed and stirred continuously, and gelled in a water bath at 70°C for 15 hours to obtain SnO 2 -CeO 2 Gel, immersed in sulfuric acid with a concentration of 3mol / L for 2.5h, suction filtered, dried at 100°C, calcined at 600°C for 3.5h, cooled and prepared into SO with an average particle size of 50nm using a superfine pulverizer 4 2- / SnO 2 -CeO 2 Nano solid superacid catalyst.

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Abstract

The invention discloses a diisopropyl succinate synthesis method. According to the synthesis method, succinic anhydride and isopropanol serve as raw materials, a tubular reactor is used for segmented catalysis by taking acid resin and nano-solid super-acid as catalysts to continuously produce diisopropyl succinate, segmented catalysis is performed by the aid of different acidity and catalytic activity of the acid resin catalysts and the nano-solid super-acid, so that reaction yield and product purity are high, and products are easily purified. The preparation method is green, environmentally friendly, simple in preparation, low in cost, high in yield and purity and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a method for synthesizing diisopropyl succinate, in particular to a method for sequentially producing diisopropyl succinate by using different catalysts in a tubular reactor. Background technique [0002] Diisopropyl succinate, also known as diisopropyl succinate (DIPS), is an aliphatic carboxylic acid derivative. Mainly used in organic pigments, pharmaceuticals, spice intermediates, food additives, agricultural product processing, gas chromatography stationary liquid and other fields. In the early 1980s, Ciba Specialty Chemicals first applied diisopropyl succinate to a new high-performance organic pigment—the structure containing 1,4-diketopyrrolopyrrole in the molecule (DPP pigment). The succinic acid diester compound has good light resistance, heat resistance and solvent resistance. After pigmentation treatment, it has high tinting strength, bright color and good dispersibility. In 1986, the company realized the industrial...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/08C07C69/40B01J27/053
CPCB01J27/053C07C67/08C07C69/40
Inventor 高美容
Owner 黑龙江邦普生物科技有限公司
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