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Method for 3- hydroxyl propionaldehyde hydrogenation to produce 1,3-propanediol

A technology of hydroxypropionaldehyde and hydroxypropionaldehyde mole, which is applied in the field of 3-hydroxypropionaldehyde hydrogenation preparation 1, can solve the problems of low reaction activity, inaccurate definition of catalyst composition, shortened catalyst service life, etc.

Active Publication Date: 2006-02-15
SHANGHAI HUAYI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrogenation of 3-hydroxypropionaldehyde is an important way to synthesize 1,3-propanediol. Since 3-hydroxypropionaldehyde is a very unstable substance, various side reactions such as polymerization, condensation, and decomposition are prone to occur during the hydrogenation reaction. Moreover, these reactions will intensify as the temperature increases, and the generated by-products will reduce the activity of the catalyst and shorten the service life of the catalyst.
This patent only describes the preparation method of the catalyst, but the composition of the catalyst is not accurately defined. This patent is difficult to implement, and the content of cobalt in the auxiliary agent is less than 6%.
In Chinese patent CN1145528, a non-supported catalyst prepared by a mixed method is used to hydrogenate 3-hydroxypropionaldehyde to produce 1,3-propanediol. The catalyst contains 25-60% nickel, 5-20% molybdenum, 10-50% viscose A bonding material, wherein the bonding material is at least one of oxides of silicon or silicates and oxides of zinc, aluminum, zirconium, magnesium or calcium. The catalyst has been tested for 720 hours of reaction activity. The stability of the catalyst Poor sex and low reactivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～19

[0013] 1. Preparation of catalyst:

[0014] Mixing method Add the nickel nitrate aqueous solution and the soluble salt aqueous solution of component X or the oxide of X to the catalyst carrier according to the metering ratio, mix uniformly and extrude or tablet, then dry at 120°C for 20 hours, and then dry at 600°C Bake 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. After the reduction is completed, the conditions are adjusted to the conditions required for the reaction. The composition of catalyst in each embodiment, the kind of starting material of component X is shown in Table 1.

[0015]

Example

Component X

Component X's

starting material

carrier

The mass of Ni

Min content, %

The mass of X

Min content, %

Example 1

co

cobalt nitrate

γ-Al 2 o 3

20

10

Exam...

Embodiment 20

[0022] 180 grams and 100 grams of the catalyst 20%Ni-10%Mo / hydrogen mordenite in Example 9 are respectively packed into the first and second sections of fixed-bed tubular reactors connected in series, and are reduced with hydrogen for 4 hours at 450° C., and the reduction ends Then the temperature was lowered to 50°C. The 10% 3-hydroxy propionaldehyde aqueous solution and hydrogen gas 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 ...

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Abstract

The invention provides a method for 3- hydroxyl propionaldehyde hydrogenation to produce 1,3-propanediol, which comprises using molecular sieve, oxide compound or their mixture as carrier, at the presence of Ni-containing dual-component catalyst, transforming 3-hydroxyl propionic aldehyde aqueous solution into 1,3-propylene glycol through two-stage hydrogenation reaction.

Description

technical field [0001] The invention relates to a method for preparing 1,3-propanediol by hydrogenating 3-hydroxy propionaldehyde. Background technique [0002] 1,3-propanediol is an important organic chemical raw material, which can be directly used as an antifreeze agent, and is also a synthetic raw material for various plasticizers, detergents, preservatives and emulsifiers, and can be used for the synthesis of medicine and organic synthesis Intermediates, but its main application field is used as the main raw material for the synthesis of new polyester materials - poly(1,3-trimethylene terephthalate) (PTT). It makes the PTT molecule have a Z-shaped spring-like structure and unique physical and chemical properties. Therefore, the PTT fiber not only has good properties such as softness and easy coloring, but also has good resilience and anti-pollution properties like nylon. It is used in carpets, engineering plastics, Clothing fabrics and other fields have good applicatio...

Claims

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Application Information

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IPC IPC(8): C07C31/20C07C29/141
Inventor 张春雷宁春利冯世强邵敬铭
Owner SHANGHAI HUAYI NEW MATERIAL
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