1,3-propylene glycol preparation catalyst and preparation method thereof

A catalyst, propylene glycol technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the one-time investment of production equipment and expensive production costs, difficult to operate, Respond to problems such as high pressure, achieve the effect of reducing one-time investment and production costs, reducing difficulty, and reducing pressure requirements

Inactive Publication Date: 2009-03-18
FUDAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a catalyst for producing 1,3-propanediol by hydrogenation of 3-hydroxypropionate methyl ester and a preparation method thereof, so as to overcome the need for the hydrogenation of 3-hydroxypropionate methyl ester in existing catalysts. The reaction pressure of hydrogen to produce 1,3-propanediol is relatively high, the one-time investment and production cost of production equipment are expensive, and the defects are not easy to operate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Put 60.8 grams of copper nitrate (Cu(NO 3 ) 2 ·3H 2 O), 2.9 grams of manganese nitrate (Mn(NO 3 ) 2 ) and 66.3 grams of γ-aminopropyltriethoxysilane ((EtO) 3 Si(CH 2 ) 3 NH 2 ) was dissolved in 400 ml of ethanol-water (50vol%) solution. Under heating and stirring, use 10% ammonia solution to neutralize to pH = 8, form a gel within 8 hours, age at room temperature for 6 hours, dry at 110°C for 14 hours, bake at 400°C for 4 hours, and shape. The catalyst was reduced in a hydrogen stream at 300°C for 4 hours before use.

Embodiment 2

[0039] Put 51.5 grams of copper chloride (CuCl 2 2H 2 O), 1.7 g of manganese chloride (MnCl 2 ) and 65.1 grams of N-β-aminoethyl-γ-aminopropyltriethoxysilane ((EtO) 3 Si(CH 2 ) 3 NHCH 2 CH 2 NH 2 ) was dissolved in 400 ml of ethanol-water (50vol%) solution. Under heating and stirring, use 10% nitric acid aqueous solution to neutralize to pH = 6, form a gel within 10 hours, age at room temperature for 6 hours, dry at 120°C for 12 hours, bake at 400°C for 4 hours, and shape. The catalyst code is CSM-64. The catalyst was reduced in a hydrogen stream at 300°C for 4 hours before use.

Embodiment 3

[0041] Put 20.1 grams of copper acetate (Cu(CH 3 OO) 2 ·H 2 O), 1.1 g of manganese acetate (Mn(CH 3 COO) 2 4H 2 O) and 65.1 grams of γ-aminopropylmethyldiethoxysilane ((EtO) 2 CH 3 Si(CH 2 ) 3 NH 2 ) in 400 ml of ethanol-water (50vol%) solution. Under heating and stirring, use 10% ammonia solution to neutralize to pH = 8, form a gel within 12 hours, age at room temperature for 6 hours, dry at 140°C for 10 hours, bake at 400°C for 4 hours, and shape. The catalyst was reduced in a hydrogen stream at 300°C for 4 hours before use.

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PUM

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Abstract

The invention relates to a catalyst used for preparing 1, 3-trimethylene glycol by hydrogenation of 3-hydroxypropanoic acid methyl ester; the catalyst consists of active components as follows: 40-70% of CuO, 20-50% of additive SiO2 and 1-10% of cocatalyst MnO2 according to weight percentage; the preparation method sequentially comprises the steps as follows: a) Cu salt, Mn salt and organosilane are mixed according to the molar percentage thereof in the catalyst and dissolved by alcohol-water solution; b) the prepared mixed solution of various salts is heated and mixed so as to form sol and gel; c) the gel is dried, roasted and formed; wherein, the organosilane containing alkoxy group is chosen from one or more out of Gama-aminopropyltriethoxysilane, Gama- Aminopropylmethyldiethoxysilane, Gama-aminopropyl trimethoxysilane or N-Beta- aminoethyl-Gama-3-aminopropyl triethoxysilane. The reaction pressure of the catalyst can achieve 3-6MPa, thus reducing the investment and production cost of the production device and reducing the operation difficulty.

Description

technical field [0001] The invention belongs to the field of organic synthesis, in particular to a catalyst for preparing 1,3-propanediol from 3-hydroxypropionate methyl ester. Background technique [0002] 1,3-propanediol is an important organic chemical raw material, mainly used in the production of polymers, such as thermoplastic polyurethane, poly(trimethylene terephthalate) (PTT), copolyester ether, etc., and can also be used as a solvent, Intermediates of organic synthesis such as antifreeze, protective agent or synthetic medicine. Among them, the PTT prepared by using it as an important monomer to replace ethylene glycol and 1,4-butanediol is much better than PET (polyethylene terephthalate) and PBT (polyethylene terephthalate 1, 4-butanediol ester). High-performance polyester fibers made of PTT not only have excellent resilience, bulkiness, and easy-to-dye properties, but also have inherent stain resistance, antistatic properties, etc., and have great development p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889C07C31/20C07C29/149
Inventor 曹勇刘倩赵正康王路存应于舟杨菊群张旭红范康年
Owner FUDAN UNIV
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