Alcohol gas phase dehydrogenation catalyst, preparation method thereof and application

A dehydrogenation catalyst and gas-phase dehydrogenation technology, which is applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, oxidation to prepare carbonyl compounds, etc., can solve the problem of fast carbon deposition and deactivation rate of catalysts and high price , Catalysts are easy to pulverize and other problems, to avoid catalyst pulverization and coking problems, reduce production costs, and reduce energy consumption

Active Publication Date: 2012-06-20
DAFENG HEGNO PHARMA +2
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Copper, zinc, nickel, platinum, palladium, rhodium and other metals or their alloys have good activity and high selectivity for the dehydrogenation of alcohols, but platinum and other precious metals are expensive, and copper, zinc and other metals are mainly used as catalysts
[0003] In the early days, alloys such as copper or brass in the shape of particles, meshes, and fibers were used as catalysts for dehydrogenation. This type of catalyst has the following disadvantages: due to the small active surface area per unit mass of the catalyst, the catalyst activity is very low, and th

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. Preparation of Alcohol Gas Phase Dehydrogenation Catalyst

[0042] a) First prepare 1L of copper nitrate aqueous solution with a concentration of 0.5mol / L, then add 50g of polyvinylpyrrolidone and 0.2g of sodium lauryl sulfate;

[0043] b) adding ammonia water with a mass percentage concentration of 1% to the solution system obtained in step a) while stirring until the solution system completely becomes clear;

[0044] c) First prepare 1L of zinc nitrate aqueous solution with a concentration of 0.27mol / L, then add 28g of polyvinylpyrrolidone and 0.11g of sodium lauryl sulfate;

[0045]d) Mix the solution obtained in step b) and step c), then add 15g of silicon dioxide, then adjust the temperature of the solution to 50°C, and add an aqueous solution of hydrazine hydrate with a mass percentage concentration of 0.8% while stirring until the pH value reaches 6.8 ~7.2;

[0046] e) Continue to stir for 20 minutes, then age for 15 hours, centrifuge, wash with water and / or...

Embodiment 2

[0052] 1. Preparation of Alcohol Gas Phase Dehydrogenation Catalyst

[0053] a) First prepare 1 L of copper nitrate aqueous solution with a concentration of 0.1 mol / L, then add 20 g of polyvinylpyrrolidone and 0.1 g of sodium lauryl sulfate;

[0054] b) adding ammonia water with a mass percentage concentration of 5% into the solution system obtained in step a) while stirring until the solution system completely becomes clear;

[0055] c) First prepare 1L of zinc nitrate aqueous solution with a concentration of 0.024mol / L, then add 4.8g of polyvinylpyrrolidone and 0.024g of sodium lauryl sulfate;

[0056] d) Mix the solution obtained in step b) and step c), then add 2.4g of silicon dioxide, then adjust the temperature of the solution to 30°C, and add an aqueous solution of hydrazine hydrate with a mass percentage concentration of 1.5% while stirring until the pH value reaches 6.8~7.2;

[0057] e) Continue to stir for 30 minutes, then age for 25 hours, centrifuge, wash with wa...

Embodiment 3

[0063] 1. Preparation of Alcohol Gas Phase Dehydrogenation Catalyst

[0064] a) First prepare 1L of aqueous copper sulfate solution with a concentration of 0.05mol / L, then add 5g of polyvinylpyrrolidone and 1g of sodium lauryl sulfate;

[0065] b) adding ammonia water with a mass percentage concentration of 15% into the solution system obtained in step a) while stirring until the solution system completely becomes clear;

[0066] c) first prepare 1L of zinc sulfate aqueous solution with a concentration of 0.025mol / L, then add 2.5g of polyvinylpyrrolidone and 0.5g of sodium lauryl sulfate;

[0067] d) Mix the solution obtained in step b) and step c), then add 0.83g of silicon dioxide, then adjust the temperature of the solution to 80°C, and add an aqueous solution of hydrazine hydrate with a mass percentage concentration of 1.0% while stirring until the pH value reaches 6.8~7.2;

[0068] e) Continue to stir for 60 minutes, then age for 40 hours, centrifuge, wash with water an...

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 invention discloses an alcohol gas phase dehydrogenation catalyst, a preparation method thereof and application. The catalyst is composed of cuprous oxide, zinc oxide, silicon dioxide, metal oxides, graphite and magnesium stearate according a certain ratio. The preparation method of the catalyst comprises first preparing silicon dioxide composite powder where cuprous oxide and zinc oxide are loaded, adding the metal oxides, graphite and magnesium stearate into the prepared composite powder, and carrying out mixed preforming. The catalyst enables an alcohol gas phase dehydrogenation reaction to be carried out at a low temperature, energy consumption is reduced, and the problems of chalking and coking of the catalyst caused by high temperature are solved. Besides, under the catalysis of the catalyst, a reaction for preparing isovaleraldehyde by isoamyl alcohol gas phase dehydrogenation can achieve selectivity of 98%-99%, conversion rate of 96%-99% and product purity of 95%-97%, operation of isovaleraldehyde can be simplified, preparation cost of isovaleraldehyde is reduced, and the requirements for industrialized batch production of isovaleraldehyde are fully met.

Description

technical field [0001] The invention relates to an alcohol gas-phase dehydrogenation catalyst and its preparation method and application, belonging to the technical field of catalysts. Background technique [0002] Alcohol dehydrogenation is a major method for the preparation of aldehydes and ketones. Copper, zinc, nickel, platinum, palladium, rhodium and other metals or their alloys have good activity and high selectivity for the dehydrogenation of alcohols, but platinum and other precious metals are expensive, and copper, zinc and other metals are mainly used as catalysts . [0003] In the early days, alloys such as copper or brass in the shape of particles, meshes, and fibers were used as catalysts for dehydrogenation. This type of catalyst has the following disadvantages: due to the small active surface area per unit mass of the catalyst, the catalyst activity is very low, and the conversion rate at low temperatures It is very low, and it is required to be above 400°C....

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
IPC IPC(8): B01J31/28C07C47/02C07C45/29
Inventor 刘德铭鲁向阳戴向前
Owner DAFENG HEGNO PHARMA
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