Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing 1,3-propylene glycol by 3-hydroxypropionaldehyde hydrogenation

A technology of hydroxypropionaldehyde and propylene glycol, which is applied to the hydrogenation of 3-hydroxypropionaldehyde to produce 1, can solve the problems of increased production cost, easy platinum poisoning, and decreased selectivity, and achieves reduced hydrogenation production costs, mild hydrogenation conditions, The effect of activity improvement

Inactive Publication Date: 2005-01-12
SINOPEC SHANGHAI PETROCHEMICAL CO LTD
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantage is that the selectivity of 1,3-propanediol fluctuates greatly. When the conversion rate is low, the selectivity can reach 100%, but if the conversion rate increases, the selectivity will decrease obviously.
And Pt / TiO 2 The catalyst is an improvement of this catalyst, especially in terms of activity stability, but because platinum is easily poisoned, the requirements for the content of sulfur, phosphorus and arsenic in the reaction solution are extremely high, which will also cause a decrease in production costs. Increase

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing 1,3-propylene glycol by 3-hydroxypropionaldehyde hydrogenation
  • Method for preparing 1,3-propylene glycol by 3-hydroxypropionaldehyde hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～12

[0019] Preparation of catalyst:

[0020] Nickel nitrate and a water-soluble compound containing the promoter component A are prepared into an aqueous solution according to a certain proportion, and then the catalyst carrier is added according to the proportion, and stirred evenly. When it reaches a certain viscosity, it is extruded into strips and dried in the shade. In order to improve the strength of the catalyst and decompose the metal compounds into oxides, calcinations were carried out at 80°C, 300°C and 700°C for 3 hours, 4 hours and 5 hours, respectively. After the calcination is completed, it is naturally lowered to room temperature and loaded into the reduction reactor. When the hydrogen pressure is 0.2 MPa, the temperature is raised at 470 ° C and reduced for about 4 hours. The degree of reduction can be judged from the amount of water generated. After the reduction, it was lowered to room temperature in a nitrogen atmosphere and stored in water for later use.

[0...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The method for preparing 1,3-propylene glycol by means of hydrogenation of 3-hydroxy-propionaldehyde is characterized by that the weight percentage concentration of raw material 3-hydroxy-propionaldehyde aqueous solution is 10-20%, in the presence of catalyst two-stage hydrogenation process can be adopted to obtain 1,3-propylene glycol, in which the first stage hydrogenation temp. is 25-60 deg.C, second stage hydrogenation temp. is 110-130 deg.C, hydrogen gas pressure of two-stage hydrogenation is 4.0-7.0 MPa, and its space velocity is 0.1-5 hr (-1), and the active component of the catalyst is Ni-A, in which A is any one of Cr, Zn, Mo or Fe, and its carrier is molecular sieve containing Al2O3 or SiO2 or containing both them simultaneously, and the weight percetnage content of the actigve component of the catalyst is 30-60%.

Description

technical field [0001] The present invention relates to a method for preparing 1,3-propanediol by hydrogenation of 3-hydroxypropionaldehyde. The catalyst active components used contain Ni and Cr, Zn, Mo or Fe. Background technique [0002] 1,3-Propanediol is a versatile compound that, in addition to its use in the production of polyurethanes and cyclic compounds, is the main monomer for poly(1,3-trimethylene terephthalate) fibers. Polypropylene terephthalate fiber is a kind of polyester with excellent performance. Although it has come out in the 1950s, because 1,3-propylene glycol cannot be industrialized, it makes polyethylene terephthalate 1,3-propylene glycol. The development of ester fibers has been stagnant for many years. In recent years, with the successful industrial production of 1,3-propanediol, the development and application of polyethylene terephthalate fiber has attracted attention again. At present, the hydration of acrolein to generate 3-hydroxypropanal, fo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/14C07C31/20
Inventor 徐泽辉郭世卓刘华婷瞿国华
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com