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A kind of catalyst for producing 1,3-propanediol by hydrogenation of aqueous glycerin solution and preparation method thereof

A glycerin aqueous solution and catalyst technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve complex problems such as solvent recovery, achieve large market value and industrial application prospects, high stability, and high production rate Effect

Active Publication Date: 2021-08-10
JIANGSU SEVENCONTINENT GREEN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The solvents in Chinese patents 200810224899.X and 201010262066.X all use composite solvent 1,3-dimethyl-2-imidazolidinone-water or alcohol-water mixture, and solvent recovery is more complicated
But none of its 1,3-propanediol yields exceeded 6%

Method used

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  • A kind of catalyst for producing 1,3-propanediol by hydrogenation of aqueous glycerin solution and preparation method thereof
  • A kind of catalyst for producing 1,3-propanediol by hydrogenation of aqueous glycerin solution and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] The catalyst used is Pt / Mo / W-molecular sieve, and the mass percentage of metal is Pt:Mo:W=2:1:10. The catalyst preparation steps include: 1) impregnating molecular sieves with the required amount of ammonium metatungstate aqueous solution, keeping at 90°C for 20 hours, drying at 110°C, and roasting at 700°C for 3 hours to obtain a tungsten-molecular sieve composite oxide carrier; 2) The required amount of chloroplatinic acid and molybdenum nitrate was mixed with the carrier, impregnated for 9 hours, dried at 110°C, and calcined at 400°C for 3 hours to obtain catalyst A.

Embodiment 2

[0035] The catalyst used is Pt / Mo / W-molecular sieve, and the mass percentage of metal is Pt:Mo:W=2:1:10. The preparation steps were the same as in Example 1, except that the calcination temperature in the second step was changed to 500° C. to obtain catalyst B.

Embodiment 3

[0037] The catalyst used is Pt / Mo / W-molecular sieve, and the mass percentage of metal is Pt:Mo:W=2:2:10. The preparation steps were the same as in Example 1 to obtain catalyst C.

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Abstract

The invention relates to a catalyst for preparing 1,3-propanediol by hydrogenation of aqueous glycerin solution and a method for preparing 1,3-propanediol. The catalyst includes molecular sieves, Pt, X and W loaded on the molecular sieves, wherein X is Mo and / or Co. The preparation method of 1,3-propanediol is that the glycerin aqueous solution with a mass percentage concentration of 10% to 60%, in the presence of the above-mentioned catalyst, at a reaction temperature of 130 to 200°C, feed hydrogen to control the pressure at 1 to 6MPa, The air speed is 0.1~5h ‐1 , the reaction produces 1,3-propanediol. The catalyst of the present invention has high stability, and is suitable for preparing 1,3-propanediol by hydrogenation of glycerin aqueous solution. The method of the present invention is used to prepare 1,3-propanediol. The raw materials are easy to obtain, the reaction conditions are mild, and the reaction temperature requires only water as a solvent. 1,3-propylene glycol has a high production rate, meets the requirements of green chemical industry, and has great market value and industrial application prospects.

Description

technical field [0001] The invention relates to a catalyst for preparing 1,3-propanediol by hydrogenating glycerin aqueous solution and a preparation method of the catalyst. Background technique [0002] The rapid expansion of biodiesel production capacity around the world has created overcapacity in the by-product glycerol. This makes glycerin an extremely attractively priced raw material. [0003] 1,3-propanediol is an important chemical raw material. The polyester fiber trimethylene terephthalate (PTT) synthesized from it as a monomer has the high performance of polyethylene terephthalate (PET). Performance and easy processability of polybutylene terephthalate (PBT), it has broad application prospects in the production of plasticizers, detergents, preservatives, emulsifiers and other fields. [0004] At present, the preparation methods of 1,3-propanediol mainly include: ethylene oxide method, acrolein hydration method, microbial fermentation method and glycerol hydrogen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/00B01J37/02B01J37/08C07C29/60C07C31/20
CPCB01J29/00B01J37/0201B01J37/08B01J2229/18C07C29/60C07C31/205
Inventor 孟楠蔡军义刘玉超陶亚春周东熠
Owner JIANGSU SEVENCONTINENT GREEN CHEM CO LTD