Preparation method of butanediol secondary hydrogenation catalyst by butynediol two-step hydrogenation

A technology for butynediol and butanediol production, which is applied in the direction of hydrogenation preparation, etc. It can solve the problems of poor catalyst stability, influence on normal operation, and reactor pressure fluctuations, etc., and achieve long catalyst service life, high catalytic activity and selectivity Effect

Active Publication Date: 2010-06-02
SHANXI UNIV
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the pulverization of silica gel under the high pressure of the second stage reaction, the fine particles produced will cause the pressure fluctuation of the reactor, resulting in the occurrence of parking accidents
The poor stability of the catalyst greatly affects the normal production

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
  • Preparation method of butanediol secondary hydrogenation catalyst by butynediol two-step hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0022] Take an alumina carrier, impregnate it with a conventional soluble magnesium salt, dry it, and roast it to obtain a carrier containing 4% by weight of magnesium; take 100 g of this carrier and treat it at 150 ° C for 10 min at 0.1 mm Hg pressure, or directly place it in a blast oven at 150 ° C Heat for 3 hours, then lower to room temperature for later use; weigh 59.4g nickel nitrate hexahydrate, 50.8g nickel acetate tetrahydrate and 1g polyethylene glycol 4000 to prepare 200mL mixed nickel salt solution; take 200mL prepared mixed nickel salt solution for immersion Put it into 100g of the treated carrier, let it stand at room temperature for 2h; filter off the excess solution, dry at 120°C for 8h, heat up to 450°C for 8h to decompose the salt, and then put it in H 2 Reduction treatment was carried out at 350° C. for 30 h in a stream, and after cooling down to room temperature, it was deactivated by oxygen to obtain Catalyst No. 1.

Embodiment 2

[0024] An alumina carrier was taken, impregnated with a conventional soluble copper salt, dried, and calcined to obtain a carrier containing 3% by weight of copper; the rest of the steps were the same as in Example 1 to obtain Catalyst No. 2.

Embodiment 3

[0026] An alumina carrier was taken, impregnated with a conventional soluble molybdenum salt, dried, and calcined to obtain a carrier containing 4% by weight of molybdenum; the rest of the steps were the same as in Example 1 to obtain catalyst No. 3.

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

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to view more

Abstract

The invention provides a method for preparing a butanediol secondary hydrogenation catalyst through adopting the butynediol two-step hydrotreation, and the method comprises the following steps: an accelerant is introduced into an alumina carrier; the carrier is heated; mixed nickel complex solution containing organic nickel salt, inorganic nickel salt and surfactant is prepared; the mixed nickel salt solution is dipped on the heated carrier, and the catalyst product with the nickel content of 5-25 w% and the accelerant content of 0.001-6 w% can be obtained by drying, baking, deoxidizing and passivating. The catalyst can be used in the process of preparing the butanediol secondary hydrogenation by adopting the butynediol two-step hydrotreation, the carbonyl can be reduced to be lower than 0.2 mg (KOH)*g<-1>, and the contents of acetal and butylene glycol are enabled to be reduced to the lowest level. Through the subsequent rectification, the butylene glycol product with the purity morethan or equal to 99.5 percent and the chromaticity lower than or equal to 10 AHPA can be produced.

Description

technical field [0001] The invention relates to a two-stage hydrogenation catalyst, in particular to a preparation method of a two-stage hydrogenation catalyst for 1,4-butynediol hydrogenation to 1,4-butanediol. Background technique [0002] The two-step hydrogenation of 1,4-butynediol to 1,4-butanediol involves the following process: the first step (also known as one-stage hydrogenation) generally adopts a suspended bed (or bubbling slurry bed), using Raney-nickel catalyst, low-pressure hydrogenation at 50-80°C, 1-3MPa hydrogen pressure, hydrogenation of 1,4-butynediol to 1,4-butanediol, while the solution contains butanol , unsaturated hydrogenation product butene diol, butene diol isomerization product 4-hydroxybutyraldehyde and acetal obtained by condensation reaction of aldehyde and alcohol; because 4-hydroxybutyraldehyde and acetal cannot pass rectification method to remove, the presence in the product affects the purity and quality of the product, and further high-pr...

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): B01J23/78B01J23/755B01J23/883C07C29/17C07C31/20
Inventor 赵永祥李海涛杨学英孙自瑾张鸿喜梁小元刘滇生张因盖媛媛
Owner SHANXI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap