Catalyzer for the oxalic ester hydrogenation synthesizing of ethylene glycol and method of preparing the same

A technology of catalyst and oxalate, applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of favorable catalytic hydration

Active Publication Date: 2008-03-12
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method still uses petroleum as raw material, and needs to rebuild the ethylene glycol production device, which is more suitable for the newly constructe...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take by weighing two parts of silica sol 100g carrier, one part is modified (recorded as SiO 2 (M)), one unmodified (denoted as SiO 2 (W). According to 25wt%Cu+10wt%Zn / SiO 2 content preparation catalyst, the steps are as follows: select copper nitrate, prepare impregnation solution according to the Cu loading amount, prepare the impregnation solution according to the loading amount, and prepare the modified SiO 2 After the carrier was soaked in the solution for 24 hours, it was vacuum-dried for 8 hours to obtain a solid. Choose ZnCl 2 According to the Zn load, the impregnating solution is formulated. In order to prevent metal ions from being hydrolyzed to form hydroxides or oxides, a small amount of hydrochloric acid is added to the impregnating solution to make the pH of the impregnating solution = 5-6. Soak for 10 hours, dry it in a water bath to become a solid after fully absorbed, then dry the solid at 120°C for 8 hours, bake at 650°C for 6 hours, and then use a...

Embodiment 2

[0018] Weigh two parts of 100g modified silica sol carrier, according to 35wt% Cu+15wt% Zn / SiO 2 Content preparation catalyst, its steps are as follows: select cupric chloride, prepare impregnating liquid according to Cu loading amount, load amount is formulated into impregnating liquid, after immersing the prepared modified silica sol carrier in this solution for 10 hours, vacuum-dry for 6 hours. hours to get solids. Choose Zn(NO 3 ) 3 , according to the loading capacity of Ag, the impregnating solution was formulated. In order to prevent metal ions from being hydrolyzed to form hydroxide or oxide precipitation, a small amount of nitric acid was added to the impregnating solution to make the pH of the impregnating solution = 6.5, and then the modified silica sol carrier was impregnated Soak in the solution for 10 hours, dry it in a water bath after being fully absorbed, and then dry the solid at 120°C for 6 hours, and roast it at 500°C for 6 hours, respectively use nitrogen...

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PUM

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Abstract

A catalyst for hydrogenated synthesis of glycol with oxalate and a preparation method for the catalyst belong to the glycol preparation technical field. The catalyst of the present invention uses the copper metal as the main active component, and zinc as the promoter, and is manufactured with the method of deposition. A carrier of the catalyst is the modified silica sol. The select content of the copper metal is 5 to 45 percent of the carrier weight, and the optimal content of the copper metal is 10 to 40 percent. The content of zinc metal is 0.1 to 15 percent of the carrier weight, and the optimal content of zinc metal is 1 to 8.0 percent. The select specific surface area of the carrier is 90-350m2/g, and the optimal is 150-300m2/g. Proven by experiments, the catalyst is provided with the very high reaction activity and glycollate selectivity in the reaction to synthesize glycollate with oxalate and hydrogen Moreover, the catalyst is provided with the long usable life and the stable reaction performance, and can be easily controlled.

Description

technical field [0001] The invention belongs to the technical field of preparation of ethylene glycol, and further relates to a catalyst for synthesizing ethylene glycol by vapor-phase hydrogenation of oxalic acid ester and a preparation method thereof. Background technique [0002] Ethylene glycol is an important basic organic raw material in petrochemical industry. It can be mixed with water in any proportion. It has a high boiling point and a low freezing point. It reacts with terephthalic acid (PTA) to form polyethylene terephthalate, which can be used as The raw materials of polyester fibers and polyester plastics are also widely used in the production of lubricants, plasticizers, paints, adhesives, surfactants, explosives and other industrial fields. They can also be used to prepare antifreeze or directly as organic solvents. In addition, it can also be used in industries such as paint, photographic developer, brake fluid and ink. [0003] At present, large-scale ethy...

Claims

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Application Information

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IPC IPC(8): B01J23/80C07C31/20C07C29/149
CPCY02P20/52
Inventor 王保伟马新宾许根慧
Owner TIANJIN UNIV
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