Supported solid alkali catalyst for synthesis of propylene glycol

A solid base catalyst, propylene glycol ether technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, organic chemistry, etc., can solve problems such as equipment corrosion and product post-treatment process complexity, and achieve Low cost, simple preparation method, and easy-to-obtain raw materials

Inactive Publication Date: 2006-04-26
MAOMING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional acid-base catalysts mainly include BF 3 , NaOH (KOH), sodium alcoholate (potassium alcoholate) and tertiary amines, they are homogeneous catalysts, which are c

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Roast magnesium oxide, calcium oxide, zinc oxide, and zirconium oxide at 400°C for 3 hours, then press KNO 3 15%, MgO, CaO, ZnO, ZrO 2 Impregnation of magnesium oxide, calcium oxide, zinc oxide, zirconium oxide into KNO for a composition (weight percent) of 85% 3 In the solution, vacuumize, stand still for 12 hours, dry at 120°C, and activate at 600°C for 5 hours to obtain the catalyst KNO 3 / MgO, KNO 3 / CaO, KNO 3 / ZnO, KNO 3 / ZrO 2 , respectively denoted as catalysts A, B, C, D.

Embodiment 2

[0022] Prepare the catalyst according to the same conditions as in Example 1, except that the loaded substance is changed to potassium fluoride to obtain catalyst KF / MgO, KF / CaO, KF / ZnO, KF / ZrO 2 , respectively denoted as catalysts E, F, G, H.

Embodiment 3

[0024] According to the ratio of magnesium oxide and zinc oxide each accounting for 50% when MgO-ZnO is formed, magnesium nitrate and zinc nitrate are made into a mixed salt solution, and 20% ammonia water is used as a precipitant for reaction, filtered, washed, and the filter cake is dried at 120 ° C. , and then baked at 400 ° C for 3 hours to obtain MgO-ZnO.

[0025] All the other prepare catalyst KNO according to the same conditions of embodiment 1 3 / MgO-ZnO, denoted as catalyst I.

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PUM

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Abstract

The carrier-type solid base catalyst to synthesize propylene glycol comprises: carrier selected at least one from potassium fluoride, potassium nitrate and potassium carbonate; and metal oxide. This invention is simple, can filter the catalyst for recycle, and has high activity and selectivity and isomerization proportion.

Description

technical field [0001] The invention relates to a supported solid base catalyst for synthesizing propylene glycol ether from propylene oxide and lower aliphatic alcohols. Background technique [0002] Propylene glycol ether is an industrial solvent with excellent performance, widely used in coatings, inks, dyes, printing, cleaning agents, antirust agents, anticoagulants and other industries. The performance of propylene glycol ether is similar to that of ethylene glycol ether, but its toxicity is much lower than that of ethylene glycol ether. Therefore, in the past ten years, propylene glycol ether products have developed rapidly. [0003] The synthesis of propylene glycol ether can be realized by propylene oxide and lower aliphatic alcohol under the action of catalyst. Due to the ring-opening orientation problem of propylene oxide, there are two isomers 2-hydroxypropyl methyl ether (primary ether) and 1-hydroxypropyl methyl ether (secondary ether) in the product. The resea...

Claims

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Application Information

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IPC IPC(8): B01J21/00B01J23/00C07C43/13
CPCY02P20/584
Inventor 苏秋芳陈小平刘宝生王乐夫
Owner MAOMING COLLEGE
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