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

Process for preparing ethandiol by catalyzing epoxyethane hydration

A technology for catalytic hydration of ethylene oxide and ethylene oxide, applied in hydrolysis preparation, organic chemistry, bulk chemical production, etc., can solve problems such as high energy consumption, environmental pollution by ethylene glycol catalysts, and impact on product quality

Inactive Publication Date: 2003-12-31
CHINA PETROLEUM & CHEM CORP +1
View PDF3 Cites 68 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to overcome the high reaction water ratio of non-catalytic hydration to prepare ethylene glycol in the previous literature, and the catalyst used to prepare ethylene glycol pollutes the environment, affects product quality, poor stability, and the catalyst reaction water ratio. high, resulting in huge energy consumption and high production costs. A method for preparing ethylene glycol by catalytic hydration of ethylene oxide is provided. The catalyst used in the method has good activity, selectivity and good stability. , especially suitable for low water ratio operation, which greatly reduces the heat energy required to treat excess water, and has the characteristics of low energy consumption and low production cost

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

[0043] Take by weighing 12 grams of commercially available niobium oxalate and dissolve in 40 milliliters of water to make niobium oxalate solution; weigh 1.8 grams of Zn(NO 3 ) 2 ·6H 2 O was dissolved in 5 ml of 10% dilute nitric acid aqueous solution to make zinc nitrate solution. Weigh 100 grams of α-alumina, add it to a kneader, then add the niobium oxalate and zinc nitrate solution prepared above, knead with α-alumina fully to form a lump material, extrude it, and put it in the air at 150°C Dry for 2 hours, and bake in air at 600° C. for 4 hours to obtain catalyst A. The catalyst composition is shown in Table 1.

Embodiment 2

[0045] Take by weighing 90 grams of α-alumina, 10 grams of titanium dioxide and 12 grams of commercially available niobic acid respectively, add them into a kneader and mix well to obtain a mixed material, and weigh 8.1 grams of Cd(NO 3 ) 2 ·6H 2 O was dissolved in 40 ml of 10% dilute nitric acid aqueous solution to make a cadmium nitrate solution, which was added to the aforementioned mixture, kneaded and extruded, dried in vacuum at 120°C for 2 hours, and roasted in an ammonia atmosphere at 500°C for 4 hours , to obtain catalyst B. The catalyst composition is shown in Table 1.

Embodiment 3

[0047] Catalyst C is prepared by the method of Example 2, and the difference is that in the preparation process, the niobium amine complex consumption is 7.6 grams, titanium dioxide 100 grams, Cd (NO 3 ) 2 ·6H 2 O2.7 g was dissolved in 40 ml of water, dried in air at 100°C for 3 hours, and calcined in air at 200°C for 4 hours. 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

The present invention relates to process of catalytic hydration of ethylene epoxide to prepare glycol and aims at solving the problems of available corresponding process. The said process is especially suitable for low water ratio operation, and has the features of very low heat energy consumption and power consumption, high activity, selectivity and stability of catalyst, and low production cost. The said process may be used in industrial production of glycol.

Description

technical field [0001] The invention relates to a method for preparing ethylene glycol by catalytic hydration of ethylene oxide, in particular to a method for preparing ethylene glycol by using a supported niobic acid as a catalyst. Background technique [0002] Ethylene glycol is an important aliphatic dihydric alcohol with a wide range of uses, mainly for the production of polyester resins, including fibers, films and engineering plastics. It can also be directly used as coolant and antifreeze, and it is also an indispensable substance in the production of alkyd resins, plasticizers, paints, adhesives, surfactants, explosives and capacitor electrolytes. [0003] The preparation of ethylene glycol with ethylene oxide as raw material is mainly divided into two methods, one is the direct hydration method, that is, ethylene oxide directly reacts with water under certain conditions to form ethylene glycol, and the reaction can be achieved without...

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): C07C29/10C07C31/20
CPCY02P20/52
Inventor 李应成何文军费泰康王嘉华
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