Ni catalyst, process for making catalysts and selective hydrogenation process

A catalyst and selective technology, applied in the field of new selective hydrogenation catalyst and its preparation, can solve the problems of large reactor, large catalyst volume and low activity

Inactive Publication Date: 2008-01-02
CHEM RES & LICENSING CO
View PDF2 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the very low activity of copper-based catalysts compared to palladium-based catalysts, a large volume of the catalyst is required and a large reactor is required

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
  • Ni catalyst, process for making catalysts and selective hydrogenation process
  • Ni catalyst, process for making catalysts and selective hydrogenation process
  • Ni catalyst, process for making catalysts and selective hydrogenation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1C

[0056] (this invention)

[0057] The catalysts were prepared by performing a two-step spray impregnation at ambient temperature. The gamma-alumina used for the preparation of the nickel catalyst was prepared by oil droplet gelation as particles with a diameter of 1.68 mm. Table 1 summarizes the physical properties of the alumina obtained from the manufacturer. More than about 90% of the pores in this alumina have a diameter greater than 100A. The average pore diameter is 214 Ȧ. According to the invention, this alumina is unsuitable in its present nature for the preparation of catalysts. Thus, calcining the alumina in air at 1100° C. for 3 hours yields alumina suitable for use in the preparation of catalysts. After roasting, the average diameter of alumina particles was reduced from 1.68mm to 1.45mm. The average pore diameter is 362 Ȧ. Table 2 lists the physical properties of this calcined alumina. XRD of this calcined alumina showed it to be theta alumina with some delt...

Embodiment 2B

[0076] (this invention)

[0077] It is shown below that the performance of the catalyst of the present invention is superior to that of the catalyst of Comparative Example 2A. The catalyst was prepared by a two-step spray impregnation of nickel nitrate solution on a hot alumina support. The nickel catalyst in this example was prepared using the same alumina obtained by calcination at 1100°C for 3 hours as used in Example 1C.

[0078] By dissolving 86.5g NiNO in 48g water 3 .6H 2 O to prepare a nickel nitrate solution for the first step of impregnation. 300 grams of calcined alumina was preheated in an oven to about 205°C and then added to a rotary impregnator and impregnated with the nickel nitrate solution in about 20 minutes using an atomizer. During spray impregnation, the rotary impregnator is heated with hot air. The impregnated product was dried at about 200°C by bubbling hot air into a rotary impregnator, and then the dried product was fired at 420°C for 3 hours. ...

Embodiment 2C

[0081] (this invention)

[0082] The catalyst of this example was prepared by a two-step impregnation of nickel nitrate solution at ambient temperature.

[0083] By dissolving 86.5g NiNO in 25.95g water 3 .6H 2 O to prepare a nickel nitrate solution for the first step of impregnation. The same 300 g of calcined alumina as used in Example 1C was added to the rotary impregnator and the nickel nitrate solution was sprayed using an atomizer over the alumina particles tumbled in the rotary impregnator in about 10 minutes. Dipping. The impregnated product was dried at about 200°C by bubbling hot air into a rotary impregnator, and then the dried product was fired at 350°C for 3 hours. By dissolving 47.3 g NiNO in 14.19 g water 3 .6H 2 O to prepare another nickel nitrate solution for the second impregnation step. The roasted first-stage impregnation product is subjected to a second-stage impregnation in a manner similar to that of the first-stage impregnation. Dry at 200°C and...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

More selective and efficient Ni hydrotreating catalysts are those which contain more than about 60% of the Ni content on the peripheral surface of porous supports, such as extruded alumina, which may be obtained by spraying an atomized solution of a Ni compound onto the support and drying it at a temperature in the range of from 200 to 600 DEG C. When used, for example, to remove acetylenic compounds from butadiene streams, higher recovery of the desired butadiene with lower acetylenic content and low heavy polymer deposition is obtained than was possible with prior catalysts.

Description

technical field [0001] The present invention relates to novel selective hydrogenation catalysts and methods for their preparation for use in hydrogenation reactions, such as the selective hydrogenation of acetylenic impurities in crude streams of olefins and dienes. The invention particularly relates to nickel-based catalysts. Background technique [0002] In the production process of olefins such as ethylene, propylene, butadiene, isoprene, etc., it is necessary to remove various C 2 -C 5 Mix acetylenic impurities in the crude stream such as acetylene, methylacetylene, vinylacetylene, ethylacetylene, 2-methyl-1-butene-3-yne, etc., and try to avoid loss of useful materials in the feed stream such as Ethylene, propylene, butene, butadiene, isoprene, etc. [0003] 1,3-Butadiene is an important raw material for the production of various polymers such as butadiene-styrene copolymers. One process for producing 1,3-butadiene is by steam cracking petroleum fractions to co-gener...

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 Applications(China)
IPC IPC(8): B01J23/58
Inventor 荣·J·吕
Owner CHEM RES & LICENSING CO
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