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Catalyst for hydrogenating 3-hydroxy propaldehyde to prepare 1, 3-propylene glycol

A technology of hydroxypropionaldehyde and catalysts, which is applied in the preparation of hydroxyl compounds, molecular sieve catalysts, metal/metal oxides/metal hydroxide catalysts, etc., and can solve problems such as difficult implementation, inaccurate definition of catalyst composition, poor catalyst stability, etc.

Active Publication Date: 2007-10-24
SHANGHAI HUAYI NEW MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent only describes the preparation method of the catalyst, but the composition of the catalyst is not accurately defined, making the patent difficult to implement
In patent CN1145528, a non-supported catalyst prepared by a mixing method is used to hydrogenate 3-hydroxypropionaldehyde to produce 1,3-propanediol. The catalyst contains 25-60% nickel, 5-20% molybdenum, and 10-50% bond material, wherein the bonding material is at least one of oxides and silicates of silicon and oxide species of zinc, aluminum, zirconium, magnesium and calcium, and the reaction activity of the catalyst has been investigated for 720 hours, and the stability of the catalyst is relatively high. Poor and not very reactive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～17

[0013] Preparation of catalyst by mixing method: a certain concentration of nickel nitrate aqueous solution, MoO 3 Add the soluble salt solution of component X or the oxide of X to the catalyst carrier according to a certain metering ratio, mix evenly and extrude or press into tablets, then dry at 120°C for 20 hours, and bake at 600°C for 4 hours . After the roasting is completed, it is lowered to room temperature, put into the reactor, and reduced with hydrogen at 450°C for 4 hours, and adjusted to the required reaction conditions after the reduction. The composition of catalyst in each embodiment, the kind of starting material of component X is shown in Table 1.

[0014]

[0015] Catalyst preparation by impregnation method: prepare a certain concentration of nickel nitrate aqueous solution, ammonium molybdate solution and soluble salt aqueous solution of component X, add it to the catalyst carrier for impregnation according to a certain metering ratio, and then ...

Embodiment 18

[0021] 180 g and 100 g of the catalysts in Example 11 were loaded into the first and second fixed-bed tubular reactors connected in series, respectively, and reduced with hydrogen at 450° C. for 4 hours. After the reduction, the temperature was lowered to 50° C. The raw material 10% (mass) 3-hydroxy propionaldehyde aqueous solution and hydrogen are mixed and preheated and then enter the first-stage reactor for reaction, and the materials at the outlet of the first-stage reactor enter the second-stage reactor for reaction after heating up. The conditions of the first-stage hydrogenation reaction are reaction temperature 50°C, reaction pressure 5.0MPa, space velocity of 3-hydroxypropanal aqueous solution 2.0h -1 、H 2 / 3-hydroxypropionaldehyde molar ratio is 4:1; the second stage hydrogenation reaction conditions are reaction temperature 120°C, reaction pressure 5.0MPa, space velocity of 3-hydroxypropionaldehyde aqueous solution is 3.6h -1 、H 2 / 3-hydroxypropionaldehyde molar r...

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Abstract

The catalyst for hydrogenating 3-hydroxy propaldehyde to prepare 1, 3-propylene glycol is supported Ni-Mo-X / A catalyst with the molecular sieve, oxide or their mixture as carrier and Ni, Mo and one third metal as the active components. The catalyst is used in the hydrogenating water solution of 3-hydroxy propaldehyde to prepare 1, 3-propylene glycol, and has high activity, high selectivity, mild reaction condition and high stability.

Description

technical field [0001] The invention relates to a catalyst for preparing 1,3-propanediol through hydrogenation of 3-hydroxy propionaldehyde. Background technique [0002] The hydrogenation of 3-hydroxypropionaldehyde is an important way to synthesize 1,3-propanediol. 1,3-propanediol is an important chemical raw material, mainly used in the production of polymers, such as poly(1,3-trimethylene terephthalate) (PTT), thermoplastic polyurethane, etc., and a small amount is used as solvent, antifreeze and protection agent etc. PTT molecules have a Z-shaped spring-like structure and unique physical and chemical properties. Therefore, PTT fibers not only have good properties such as softness and easy coloring, but also have good resilience and anti-pollution properties. They are used in carpets, engineering plastics, clothing fabrics and other fields. It has a good application prospect. 3-Hydroxypropionaldehyde can be prepared by hydration of acrolein and hydroformylation of eth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/883B01J29/00B01J37/02B01J37/04C07C29/141C07C31/20
Inventor 宁春利张春雷冯世强赵小歧邵敬铭
Owner SHANGHAI HUAYI NEW MATERIAL
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