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

Catalyst used for hydrating epoxy ethane to prepare ethandiol

A technology of ethylene oxide hydration and catalyst, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, hydroxyl addition preparation, etc. Acid catalyst poor stability, high reaction water ratio and other problems, to achieve the effect of long life, high selectivity, low operating water ratio

Active Publication Date: 2008-08-27
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is that the water ratio of the non-catalytic hydration reaction of ethylene oxide in the previous literature is relatively high, the energy consumption is large, the production cost is high, or the liquid acid catalyst used for catalytic hydration corrodes the equipment, pollutes the environment, and the solid acid catalyst The problem of poor stability or the inability to balance stability and activity at the same time provides a new catalyst for the hydration of ethylene oxide to prepare ethylene glycol

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

[0039] Mix 113 grams of aluminum hydroxide raw powder, 5 grams of graphite, and 5 grams of sesame powder, and then add 60 milliliters of 4% (weight) dilute nitric acid, knead fully in a kneader to form a mass of material, and extrude it. , Dry at room temperature for 24 hours, 150°C for 2 hours, and 1200°C for 4 hours to obtain strip α-Al 2 O 3 Carrier. The oxalic acid solution containing 6.25 g of niobic acid was impregnated on the prepared carrier and dried at 120°C for 2 hours; then ammonium metavanadate was dissolved in 5% (weight) hydrogen peroxide, and then impregnated on the catalyst again, and dried at 120°C 2 Hours; Finally, the lanthanum trichloride aqueous solution was impregnated on the catalyst and dried at 120°C for 2 hours. The above catalyst precursor was calcined in air at 700°C for 4 hours to obtain catalyst A. The catalyst composition is shown in Table 1.

Embodiment 2

[0041] Mix 67.6 g of aluminum hydroxide, 40 g of silica, 8 g of graphite, and 4 g of cyclodextrin thoroughly, then add 60 ml of 4% (weight) dilute nitric acid and knead it in a kneader to form a mass , Extruded into a strip, dried at 150°C for 2 hours, and calcined at 1400°C for 4 hours to obtain a strip carrier. Impregnate the above-mentioned carrier with a certain amount of ammonium molybdate solution with a concentration of 125 mmol / L at room temperature. The solid volume ratio of the impregnating liquid is 2:1, soak for 2 hours, filter off the solution, and vacuum dry at 120°C for 2 hours; 15% ammonium niobium complex solution (NH 4 [NbO(C 2 O 4 ) 2 (H 2 O) 2 ]·(H 2 O) n ) Continue to immerse the carrier after the above treatment at room temperature. The solid volume ratio of the immersion liquid is 2:1, the immersion time is 2 hours, the solution is filtered off, and the solution is vacuum dried at 120°C for 2 hours, so that the immersion is performed three times; then a cert...

Embodiment 3

[0043] Mix 40.5 grams of commercially available niobium oxalate, 15 grams of polyvinyl alcohol, 8 grams of precipitated sulfur, the required ammonium tungstate and 100 grams of titanium dioxide to obtain a mixture, then add an appropriate amount of water and knead it in a kneader to form The mass is extruded and dried at 200°C for 3 hours, and then the praseodymium trichloride solution with a concentration of 0.12 mol / L is impregnated into the catalyst, dried at 150°C for 2 hours, and calcined in a carbon dioxide atmosphere at 400°C. 4 Hours, catalyst C was obtained. The catalyst composition is shown in Table 1.

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

A catalyst for preparing ethanediol by hydrating epoxy ethane is composed of the oxide of carried Nb, at least one element or compound chosen from V, Mo, W, Sn and Pb, and at least one element or compound chosen from La, Pr and Nd. Its advantages are low consumption of water and energy and no corrosion and pollution.

Description

Technical field [0001] The invention relates to a catalyst used for the hydration of ethylene oxide to prepare ethylene glycol, in particular to a niobium oxide catalyst used for the hydration reaction of ethylene oxide to prepare ethylene glycol. Background technique [0002] Ethylene glycol is an important aliphatic diol with a wide range of uses. The main purpose is to produce polyester resins, including fibers, films and engineering plastics. It can also be used directly as a coolant and antifreeze. It is also an indispensable substance for the production of alkyd resins, plasticizers, paints, adhesives, surfactants, explosives and capacitor electrolytes. [0003] There are two main research methods for preparing ethylene glycol from ethylene oxide: one is direct hydration, that is, ethylene oxide reacts with water under certain conditions to produce ethylene glycol; the other is ethylene carbonate Ester method, that is, ethylene oxide is first combined with CO under the acti...

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): B01J23/20B01J23/30C07C29/05
Inventor 李应成何文军费泰康何立
Owner CHINA PETROLEUM & CHEM CORP
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