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Process for preparing olefine acid acid and/or olefine acid ester

A process and technology of acidic molecular sieve, applied in the field of preparation of alkenoic acid and/or alkenoic acid ester, can solve the problems of low repeatability, cumbersome preparation, easy loss of active ingredients, etc., and achieve the effects of good stability and long life

Active Publication Date: 2018-06-01
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the catalysts used in the above studies are basic catalysts or acid-base bifunctional catalysts. The preparation process generally uses methods such as impregnation, ion exchange, and co-precipitation to load the active components on the carrier. There are cumbersome preparations, complex influencing factors and The shortcomings of low repeatability and easy loss of active ingredients cannot meet the needs of industrial mass production

Method used

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  • Process for preparing olefine acid acid and/or olefine acid ester
  • Process for preparing olefine acid acid and/or olefine acid ester
  • Process for preparing olefine acid acid and/or olefine acid ester

Examples

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Effect test

Embodiment 1

[0059] Ammonium mordenite was obtained by exchanging sodium MCM-22 molecular sieve with Si / Al=2.5 (atomic ratio) (Nankai University Catalyst Factory) with 0.8 mol / L ammonium nitrate aqueous solution at 80° C. for 3 times. Calcined at 500°C for 4 hours in an air atmosphere to obtain a hydrogen-form MCM-22 molecular sieve, and then added 20% by mass of alumina binder to extrude into a rod-shaped solid acid catalyst A containing acidic MCM-22 molecular sieves of Ф3mm×3mm .

Embodiment 2

[0061] The sodium ZSM-35 molecular sieve with Si / Al=15 (atomic ratio) (Nankai University Catalyst Factory) was exchanged three times with 0.8 mol / L ammonium nitrate aqueous solution at 80° C. to obtain the ammonium ZSM-35 molecular sieve. Calcined at 500°C for 4 hours in an air atmosphere to obtain hydrogen ZSM-35 molecular sieve, then add 10% kaolin binder by mass percentage to extrude and prepare catalyst B containing acidic ZSM-35 molecular sieve in rod shape of Ф3mm×3mm.

Embodiment 3

[0063] Sodium ZSM-5 molecular sieve with Si / Al=25 (atomic ratio) (Nankai University Catalyst Factory) was exchanged three times with 0.8 mol / L ammonium nitrate aqueous solution at 80° C. to obtain ammonium ZSM-5 molecular sieve. Calcined at 500°C for 4 hours in an air atmosphere to obtain a hydrogen ZSM-5 molecular sieve, then added 30% by mass of silica binder to extrude into a bar-shaped catalyst C containing acidic ZSM-5 molecular sieve of Ф3mm×3mm.

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Abstract

The invention relates to a preparation process. The preparation process comprises the following steps: reaction raw materials containing material flow I and material flow II pass through a reactor containing a catalyst for reaction, and a reaction discharged material is formed; the obtained reaction discharged material is separated in a separation system, material flow III, material flow IV and material flow V are obtained, and the material flow IV and the material flow V obtained after separation return to the reactor; the material flow I contains formaldehyde compounds and the material flowII contains at least one of compounds shown in the formula I-1 and / or at least one of compounds shown in the formula I-2 in the description; the material flow III is at least one of compounds shown inthe formula II-1 and / or at least one of compounds shown in the formula II-2 in the description; the material flow IV is a reaction by-product; the material flow V is an unreacted raw material, wherein R1 is selected from H or C1-C8 alkyl; R2 is selected from C1-C4 alkyl.

Description

technical field [0001] The invention relates to a process for preparing enoic acid and / or enoic acid ester. Background technique [0002] Acrylic acid and methyl acrylate are important chemical raw materials, which can be used as coatings, flocculants, dispersants and binders, and are widely used in construction, water treatment, daily chemical, soil treatment and leather industries. People's daily life is closely related. At present, the most commonly used method in the industry to prepare acrylic acid and methyl acrylate is the two-stage oxidation of propylene, that is, the first step of oxidizing propylene to acrolein, and further oxidation to obtain acrylic acid. However, the raw material propylene comes from petroleum, which is a non-renewable resource and does not conform to the concept of sustainable development. [0003] With the rapid development of C1 chemistry, there is an overcapacity of acetic acid and methyl acetate. The preparation of acrylic acid and methy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/353C07C57/04C07C57/03C07C67/343C07C69/54C07C69/533
CPCC07C51/353C07C67/343C07C57/04C07C57/03C07C69/54C07C69/533
Inventor 马占玲朱文良马现刚刘红超刘勇倪友明刘世平陈其伟刘中民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI