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Y molecular sieve and preparation method for carbonylation of methyl nitrite to synthesize dimethyl carbonate

A technology of methyl nitrite and dimethyl carbonate is applied in the preparation of carbonate/haloformate, the preparation of organic compounds, molecular sieve catalysts, etc., to achieve the effect of improving space-time yield and improving conversion rate

Active Publication Date: 2022-04-19
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the Y molecular sieves used in the synthesis of dimethyl carbonate are common commercial Y molecular sieves, and there are no related articles and patent reports on the adjustment of the skeleton structure of Y molecular sieves or the application of new molecular sieve-like carriers to the synthesis of dimethyl carbonate.

Method used

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  • Y molecular sieve and preparation method for carbonylation of methyl nitrite to synthesize dimethyl carbonate
  • Y molecular sieve and preparation method for carbonylation of methyl nitrite to synthesize dimethyl carbonate
  • Y molecular sieve and preparation method for carbonylation of methyl nitrite to synthesize dimethyl carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Add 25ml of water to a 100ml beaker, and then add 1.6g of NaAlO 2 and 1.6g NaOH. Also add 25ml water to another 100ml beaker, add 11.1gNaSiO 3 ·5H 2 O. After the water in the two beakers is completely dissolved, mix together and stir for 10 minutes, and age at room temperature for 24 hours to make a directing agent;

[0026] 2. Add 30g NaSiO to a 250ml beaker 3 ·5H 2 O and 100ml water, stir to make it dissolve completely to obtain the silicon source solution; take another 250ml beaker and add 5.5g NaAlO 2 , 2.5gNaOH and 100ml water, stir until completely dissolved, add to the silicon source solution and mix evenly; add 1.2gNaOH in a water bath at 50°C while stirring 4 TiO 4 And the directing agent of 5g step 1; Continue to stir 30min, make the gel reaction mixture.

[0027] Put the above-mentioned gel reaction mixture into a reaction kettle, place it in a microwave device for treatment for 10min; Roasting to obtain Y molecular sieve.

Embodiment 2

[0029] 1. Add 25ml of water to a 100ml beaker, and then add 1.6g of NaAlO 2 and 1.6g NaOH. Also add 25ml water to another 100ml beaker, add 11.1gNaSiO 3 ·5H 2 O. After the water in the two beakers is completely dissolved, mix together and stir for 10 minutes, and age at room temperature for 24 hours to make a directing agent;

[0030] 2. Add 30g NaSiO to a 250ml beaker 3 ·5H 2 O and 100ml water, stir to make it completely dissolve to obtain silicon source solution; take another 250ml beaker and add 5.5g NaAlO 2, 2.5gNaOH and 100ml water, stir until completely dissolved, add to the silicon source solution and mix evenly; add 1.5gNaOH in a water bath at 50°C while stirring 3 PO 4 And 5g of the directing agent of the above-mentioned step 1, continue stirring for 30min to prepare a gel reaction mixture.

[0031] Put the above-mentioned gel reaction mixture into a reaction kettle, place it in a microwave device for treatment for 10 minutes, then transfer it to a polytetrafl...

Embodiment 3

[0033] 1. Add 25ml of water to a 100ml beaker, and then add 1.6g of NaAlO 2 and 1.6g NaOH. Also add 25ml water to another 100ml beaker, add 11.1gNaSiO 3 ·5H 2 O. After the water in the two beakers is completely dissolved, mix together and stir for 10 minutes, and age in a water bath at 50°C for 24 hours to make a directing agent;

[0034] 2. Add 45g NaSiO to a 250ml beaker 3 ·5H 2 O and 100ml water, stirred to make it completely dissolved to obtain the silicon source solution; another 250ml beaker was added with 3.8g NaAlO 2 , 5gNaOH and 100ml water, stir until completely dissolved, add to the silicon source solution and mix evenly; add 1.2gNaOH in a water bath at 50°C while stirring 4 TiO 4 And 8g of the directing agent of the above-mentioned step 1, continue stirring for 30min to prepare a gel reaction mixture.

[0035] Put the above-mentioned gel reaction mixture into a reaction kettle, place it in a microwave device for treatment for 15 minutes, then transfer it to...

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Abstract

The invention discloses a Y molecular sieve for carbonylation of methyl nitrite to synthesize dimethyl carbonate and a preparation method thereof. The Y molecular sieve is synthesized by a hydrothermal method and a microwave-assisted crystallization method. Sources control the composition of the mother liquor, and the crystallization reaction is carried out after microwave pre-crystallization treatment to obtain Y molecular sieve. The characteristic of the Y molecular sieve is that on the basis of maintaining the framework structure of the Y molecular sieve, titanium and phosphorus heteroatoms are doped into the framework; after the molecular sieve is loaded with active components, it is used for the carbonylation of methyl nitrite to synthesize dimethyl carbonate A chlorine-free system catalyst for esters; exhibits better catalytic activity.

Description

technical field [0001] The invention belongs to the field of molecular sieve preparation and application, and in particular relates to the synthesis of Y molecular sieve, a carrier of a catalyst for carbonylation of methyl nitrite to synthesize dimethyl carbonate. Background technique [0002] Dimethyl carbonate (Dimethyl carbonate, DMC) is an important green chemical, which has important applications in medicine, pesticides, solvents, and electrolyte additives. There are various methods for synthesizing dimethyl carbonate, including urea synthesis, transesterification, methanol oxidative carbonylation, methyl nitrite carbonylation, etc. In coal chemical industry projects, coal-to-dimethyl carbonate is favored by many researchers, and the key technology is the relevant catalysts involved in the carbonylation of methyl nitrite. [0003] Catalysts used for the carbonylation of methyl nitrite to dimethyl carbonate mainly include two types, one is a chlorine-containing system c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/06C01B39/10C01B39/24B01J29/08B01J29/89B01J29/85B01J32/00B01J29/12B01J29/14B01J35/10C07C68/00C07C69/96
CPCC01B39/24C01B39/10C01B39/065B01J29/084B01J29/89B01J29/85B01J29/126B01J29/146B01J35/1057C07C68/00B01J2229/183C07C69/96
Inventor 姚元根郭榕覃业燕陈建珊丁一凡
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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