Solid acid catalyst for preparing ethylene glycol by ethylene oxide hydration

A technology of ethylene oxide hydration and solid acid catalyst, which is applied in the direction of hydrolysis preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. Acid catalyst poor stability, high production cost and other problems, to achieve the effect of long life, high selectivity, no corrosion of equipment

Inactive Publication Date: 2005-01-19
CHINA PETROLEUM & CHEM CORP +1
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  • 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 to overcome the high ratio of water in the non-catalytic hydration reaction of ethylene oxide, high energy consumption, high production cost, or the liquid acid catalyst used for catalytic hydration corrodes equipment, pollutes the environment, and solid acid Catalyst poor stability or the defect that stability and activity cannot be taken into account at the same time, provide a kind of solid acid catalyst of ethylene oxide hydration to prepare ethylene glycol, this catalyst is used for ethylene oxide hydration reaction to prepare ethylene glycol, not only has good Activity and selectivity, suitable for low water ratio operation, and at the same time have good stability, can significantly reduce energy consumption and greatly reduce production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 6.3 grams of commercially available niobic acid are dissolved in hot oxalic acid solution (dissolved in 500 milliliters of water by 70 grams of oxalic acid and made), making niobic acid solution; 50 milliliters of 10% (weight) dilute nitric acid aqueous solution is prepared according to conventional methods. Weigh α-Al 2 o 3 Add 100 grams of carrier powder and 0.5 grams of germanium dioxide into the kneader, then add the niobic acid and nitric acid solution prepared above, and fully knead with the carrier in the kneader to form a lumpy material, which is extruded and formed. Dry at 150°C for 2 hours, and calcinate in air at 600°C for 4 hours to obtain catalyst A. The catalyst composition is shown in Table 1.

Embodiment 2

[0038] Dissolve 20 grams of commercially available niobium acetate in 40 milliliters of fumaric acid solution to make niobic acid solution; dissolve 3.6 grams of SnCl 2 2H 2 O is dissolved in concentration 10% (weight) in 15 milliliters of dilute hydrochloric acid solution, makes stannous chloride solution. Weigh Al 2 o 3 Powder 60g and SiO 2 40 grams of powder, mixed well, soaked in the above niobic acid solution for 2 hours, filtered off the solution, vacuum dried at 120°C for 2 hours, then soaked in stannous chloride solution for 2 hours, filtered, and vacuum dried at 120°C for 2 hours , and then add 70 grams of polyvinyl alcohol solution, and fully knead with the carrier in a kneader to form a lump material, extrusion molding, vacuum drying at 120 ° C for 2 hours, and roasting at 500 ° C for 4 hours in an ammonia atmosphere to obtain catalyst B . The catalyst composition is shown in Table 1.

Embodiment 3

[0040] 18.8 grams of niobic acid, 100 grams of ZrO 2 Add the carrier into the kneader and mix well, then add a certain amount of lead nitrate aqueous solution and 40 ml of dilute nitric acid binder with a concentration of 2% (weight), fully knead to form a doughy material, extrude, and dry at 100 ° C for 3 hours , Calcined in air at 200°C for 4 hours to obtain catalyst C. The catalyst composition is shown in Table 1.

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PUM

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Abstract

The invention relates to a solid acid catalyst for preparing ethylene glycol by ethylene oxide hydration, wherein the niobium oxide loaded on oxide carrying agent is used as the main active component, metallic compounds selected from IVA and antimony, phosphor, sulfur, ferrum or cobalt as catalyst promoters, the obtained catalyst can be used for preparing ethylene glycol by ethylene oxide catalytic hydration, which possesses not only good activity, selectivity, but also fine steadiness.

Description

technical field [0001] The invention relates to a solid acid catalyst used for the hydration reaction of ethylene oxide to prepare ethylene glycol, in particular to a niobic acid catalyst used for the hydration reaction of ethylene oxide to prepare ethylene glycol. 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] There are two main processes for preparing ethylene glycol from ethylene oxide: one is the direct hydration method, in which ethylene oxide and water react to form ethylene glycol under certain conditions, and the reaction can be carried out without a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/20C07C29/10C07C31/20
CPCY02P20/52
Inventor 李应成何文军费泰康李道贵
Owner CHINA PETROLEUM & CHEM CORP
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