Method for preparing DMC, DPC, ortho-carbonate, ortho-formate, dimethyl ether, and the like by using Na2CO3 or sodium formate or CO2 or CO

A technology of dimethyl ether and diethyl ether, which is applied in the fields of Na2CO3 or sodium formate or CO2 or CO to prepare DMC, DPC, orthocarbonate, orthoformate, dimethyl ether, etc. , the problem of high production cost

Inactive Publication Date: 2013-08-21
李坚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0045] Existing processes also have CO 2 Dimethyl carbonate is prepared by direct synthesis, but the process conditions are harsh and special catalysts are required. The main problem is CO 2 The one-way conversion rate is only about 20%, which makes the production cost relatively high and cannot produce a penny of economic benefits, so the so-called CO 2 Direct synthesis technology is still in the laboratory stage, and no domestic enterprise has implemented large-scale industrialization

Method used

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  • Method for preparing DMC, DPC, ortho-carbonate, ortho-formate, dimethyl ether, and the like by using Na2CO3 or sodium formate or CO2 or CO
  • Method for preparing DMC, DPC, ortho-carbonate, ortho-formate, dimethyl ether, and the like by using Na2CO3 or sodium formate or CO2 or CO
  • Method for preparing DMC, DPC, ortho-carbonate, ortho-formate, dimethyl ether, and the like by using Na2CO3 or sodium formate or CO2 or CO

Examples

Experimental program
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Effect test

Embodiment 1

[0106] Under the condition of cutting off the air, put in 30% or 98% NaOH (0.8mol) and 98% sodium carbonate solid (0.2mol), start stirring, the temperature is 40-50°C, react for 3-15 hours, add anhydrous methanol (426g), continue the insulation reaction for 14 to 20 hours, drop to normal temperature, and use carbonic acid or CO 2 Mix with water vapor to adjust the atmosphere to PH5-6, and reflux for 1 hour to obtain a methanol solution of dimethyl carbonate (DMC), Na 2 CO 3 The conversion rate is 37%, the DMC reaction yield is 85%, and dimethyl ether is produced as a by-product.

Embodiment 2

[0108] Drop into 18% sodium methoxide (0.6mol) solution in the autoclave, start stirring, pass into CO 2 Gas (0.2mol), control the temperature at 40-50°C, keep warm for 14-20 hours, then add water (0.2-0.6mol), and re-introduce CO 2 gas, to PH6, to obtain methanol solution of dimethyl carbonate, by-product Na 2 CO 3 solid. CO participating in the reaction 2 The conversion rate is 95%, and the dimethyl carbonate reaction yield is 90%.

Embodiment 3

[0110]Under the condition of cutting off air, drop into 30% NaOH (1.2mol) and 98% sodium carbonate (0.2mol), start stirring, control temperature 40~50 ℃, react 3~15 hours, add phenol (0.4mol), Control the temperature at 70-80°C, keep it warm for 14-20 hours, add 700g of benzene, stir for 0.5-1 hour, drop to room temperature, wash and separate the layers, adjust the PH of the benzene layer to 5-6 with acid, and reflux for 1 hour to obtain diphenyl carbonate Benzene suspension of ester (DPC), DPC reaction yield 90%.

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Abstract

The invention relates to a recently discovered universal synthesis method of tandem-substitution-rearrangement-elimination reaction (TSRE reaction) of elemental organic chemistry, production process synthesis routes of two products of dimethyl carbonate (DMC) and diphenyl carbonate (DPC) and traditional products of ortho-carbonate, ortho-formate, dimethyl ether, and the like through CO2 and CO direct synthesis method are redesigned. Compared with prior arts for producing the products, with the preparation method provided by the invention, energy can be greatly saved, emission can be greatly reduced, and cost can be greatly reduced.

Description

[0001] The present invention relates to a general-purpose synthesis method based on the tandem substitution rearrangement elimination reaction (abbreviation TSRE reaction) of elemental organic chemistry, which redesigns CO 2 , CO direct synthesis method to prepare two commodities of dimethyl carbonate (DMC) and diphenyl carbonate (DPC), as well as the production process synthesis route of traditional products such as orthoformate, orthocarbonate, dimethyl ether, etc., and these products Compared with the existing production process, the preparation method of the patent application of the present invention has achieved the purpose of substantial energy saving, emission reduction and cost reduction. Background technique [0002] I have been engaged in the technical service work of enterprises for a long time, and have applied for dozens of invention patents successively. Recently, after the applicant calmed down, he carefully summarized the past technical service work and his in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/96C07C68/04C07C68/00C07C43/32C07C41/60C07C43/04C07C43/06C07C41/18C07C69/06C07C69/14C07C67/27C07C19/03C07C19/043C07C17/361C07D317/38C08G64/06C08G64/32C08G64/38
Inventor 李坚
Owner 李坚
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