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Preparation method for ZSM-35 molecular sieve carbonylation catalyst

A carbonylation catalyst, ZSM-35 technology, applied in the direction of molecular sieve catalysts, physical/chemical process catalysts, carbon monoxide or formate reaction preparation, etc., can solve the problems not involved in the application of ZSM-35 molecular sieves, to improve the reaction activity and The effect of reaction stability

Active Publication Date: 2013-07-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In the above publications, only the ZSM-35 molecular sieve with FER structure is applied to the dimethyl ether carbonylation reaction, and the application of the modified ZSM-35 molecular sieve is not involved.

Method used

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  • Preparation method for ZSM-35 molecular sieve carbonylation catalyst
  • Preparation method for ZSM-35 molecular sieve carbonylation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Treat 100g of ZSM-35 molecular sieve in 500ml of 0.1mol / L sodium hydroxide solution at 80°C for 2h, filter and wash until neutral. Take 80g of alkali-treated ZSM-35 molecular sieve, mix 27g of pseudo-boehmite with 10.0% dilute nitric acid and extrude into strips. After drying and roasting, exchange three times with 0.5Mol / L ammonium nitrate solution (2 hours / time) , washed with water twice (1 hour / time), and roasted to obtain the catalyst Cat-B. Gained catalyst detects through XRF, and the Na in this catalyst 2 O is less than 0.05 wt%.

Embodiment 2

[0025] Treat 100g of ZSM-35 molecular sieve in 500ml of 0.3mol / L sodium hydroxide solution at 80°C for 2h, filter and wash until neutral. Take 80g of alkali-treated ZSM-35 molecular sieve, mix 27g of pseudo-boehmite with 10.0% dilute nitric acid and extrude into strips. After drying and roasting, exchange three times with 0.5Mol / L ammonium nitrate solution (2 hours / time) , washed with water twice (1 hour / time), and roasted to obtain the catalyst Cat-C. Gained catalyst detects through XRF, and the Na in this catalyst 2 O is less than 0.05 wt%.

Embodiment 3

[0027] Treat 100g of ZSM-35 molecular sieve in 500ml of 0.6mol / L sodium hydroxide solution at 80°C for 2h, filter and wash until neutral. Take 80g of alkali-treated ZSM-35 molecular sieve, mix 27g of pseudoboehmite with 10.0% dilute nitric acid and extrude into strips, after drying and roasting, exchange with 0.5Mol / L ammonium nitrate solution three times (2 hours / time) , washed with water twice (1 hour / time), and roasted to obtain the catalyst Cat-D. Gained catalyst detects through XRF, and the Na in this catalyst 2 O is less than 0.05 wt%.

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Abstract

The invention provides a preparation method for a ZSM-35 molecular sieve carbonylation catalyst. Specifically, the method comprises the steps of treating a Na-type ZSM-35 molecular sieve for 0.5-10 hours at a temperature of 30-90 DEG C with a 0.01-1.0 mol / L alkali solution; washing an obtained product to neutral, extrusion molding with an adhesive; exchanging with a ammonium nitrate solution; filtering; washing with deionized water; drying; and roasting to an H-type catalyst. The alkali modified ZSM-35 molecular sieve catalyst prepared by the invention has significantly increased reaction activity and stability in comparison with the ZSM-35 molecular sieve catalyst without alkali treatment.

Description

technical field [0001] The invention belongs to the field of molecular sieve catalysts, and in particular relates to a preparation method of a ZSM-35 molecular sieve carbonylation catalyst. Background technique [0002] Ethyl acetate is one of the most widely used fatty acid esters. It has excellent solubility and is mainly used as an active solvent in the formulation of coatings, inks and adhesives. It can also be used as a process solvent for pharmaceutical and organic chemical synthesis. Since it exists naturally in many fruits, it has many applications in the flavor and fragrance industry, and can be used as a flavoring agent and process extractant. The downstream products of methyl acetate mainly include acetic acid, acetic anhydride, methyl acrylate, vinyl acetate and acetamide, all of which are important basic chemical raw materials. The traditional production process of methyl acetate mostly uses methanol and acetic acid as raw materials, and concentrated sulfuric a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/65C07C69/14C07C67/37
Inventor 李秀杰谢素娟徐龙伢刘盛林张宇辛文杰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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