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Catalyst for co-production of methyl acetate and acetone from dimethyl ether and preparation method and application thereof

A methyl acetate and catalyst technology, applied in the field of heterogeneous catalysis, can solve the problems of long process flow, dependence on petroleum resources, strong corrosion, etc., and achieve the effects of simple process, guaranteed flexibility, and strong industrial application background

Active Publication Date: 2020-08-11
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

The method has a long process flow; and uses inorganic acid as a catalyst, which is highly corrosive
In addition, the method is overly dependent on petroleum resources

Method used

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  • Catalyst for co-production of methyl acetate and acetone from dimethyl ether and preparation method and application thereof
  • Catalyst for co-production of methyl acetate and acetone from dimethyl ether and preparation method and application thereof
  • Catalyst for co-production of methyl acetate and acetone from dimethyl ether and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Put 100 grams of MOR (Si / Al=15) molecular sieves into 1000 ml of 0.5 mol / L NaOH solution at 80° C. for 2 hours, filter and wash until neutral. Take out the MOR after alkali treatment of 80g, mix 28g pseudo-boehmite with 10% dilute nitric acid and extrude into strips, after roasting, exchange with 0.5mol / L ammonium nitrate three times (2 hours / time), wash with deionized water , dried, and calcined at 550°C for 4 hours, and the obtained sample was treated at 300°C in an atmosphere containing pyridine for 2 hours to obtain Catalyst 1.

Embodiment 2

[0048] 100 grams of MOR (Si / Al respectively 6.8, 10.5, 20, 30) molecular sieves were placed in 1000 ml of NaOH solution with a concentration of 0.5 mol / L and treated at 80 ° C for 2 hours, filtered and washed until neutral. Take out the MOR after alkali treatment of 80g, mix 28g pseudo-boehmite with 10% dilute nitric acid and extrude into strips, after roasting, exchange with 0.5mol / L ammonium nitrate three times (2 hours / time), wash with deionized water , dried, and calcined at 550°C for 4 hours, and the obtained samples were treated at 300°C in an atmosphere containing pyridine for 2 hours to obtain catalysts 2, 3, 4, and 5.

Embodiment 3

[0050] The content of iron in the MOR catalyst is 0.01wt%, 1.8wt%, 5wt%; the content of gallium is 0.01wt%, 1.8wt%, 5wt%; the content of iron (gallium) is 0.01wt% (0.03wt%), 3wt% (0.5wt%), and the other conditions were consistent with Example 1 to prepare catalysts 6, 7, 8, 9, 10, 11, 12, and 13.

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Abstract

The invention provides a catalyst for co-production of methyl acetate and acetone from dimethyl ether and a preparation method and application thereof. The catalyst is prepared by performing alkali treatment modification on a molecular sieve sample containing an MOR and / or EMT structure and then performing treatment under the atmosphere of pyridine and / or a pyridine substitute. Raw material gas containing dimethyl ether and carbon monoxide passes through the fixed bed reactor filled with the catalyst sample and reacts at the reaction temperature of 170-380 DEG C, the reaction pressure of 0.5-20.0 MPa and the gas volume space velocity of 500-10000 h <-1 >, and acetone is produced. The flexibility and the economy of the device for producing methyl acetate through carbonylation of dimethyl ether can be improved, and acetone production can get rid of the defects that traditional industrial production excessively depends on petroleum resources, the production process is complex, corrosion exists and the like. The whole process is simple, high in practicability and extremely high in industrial application background.

Description

technical field [0001] The invention belongs to the field of heterogeneous catalysis, and in particular relates to a catalyst for the production of methyl acetate and co-production of acetone by dimethyl ether, its preparation method and its application. Background technique [0002] Methyl acetate is a colorless, scented liquid with low toxicity and strong dissolving ability. It is an excellent cellosolve and paint solvent. As an important intermediate in the chemical industry, methyl acetate can produce its downstream products mainly ethanol, acetic acid, acetic anhydride, methyl acrylate, vinyl acetate and acetamide, etc., and its application prospects are very broad. [0003] Acetone (acetone, CH 3 COCH 3 ), also known as dimethyl ketone, is the simplest saturated ketone. It is a colorless transparent liquid with a special spicy smell. It is easily soluble in water and methanol, ethanol, ether, chloroform, pyridine, etc. It is an excellent organic solvent and is wide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/18B01J29/24B01J29/70B01J29/76B01J31/02C07C67/37C07C69/14C07C45/49C07C49/08
CPCB01J29/185B01J29/24B01J29/7069B01J29/7638B01J31/0244B01J37/0018B01J2229/18C07C45/49C07C67/37C07C69/14C07C49/08
Inventor 刘红超朱文良刘中民文富利刘勇刘世平周子乔倪友明马现刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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