Synthesis of N-methylmethyl carbamate

A technology of methyl methyl carbamate and dimethyl carbonate, which is applied in the field of synthesizing methyl N-methyl carbamate, can solve problems such as the study of un-MMC systems, and achieve economical efficiency, easy operation and mild reaction conditions. Effect

Inactive Publication Date: 2014-01-22
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new technology allows for better ways to produce chemicals from carbon sources like coal or biomass without relying on fossil fuels that have negative environmental impacts such as air pollution caused by burning them at certain times during production processes.

Problems solved by technology

The technical problem addressed in this patented text relating to the current process described in the literature involves developing an effective way to produce specific types of carbohydrate compounds that can effectively prevent harmful effects caused by certain drugs while being cost-effective compared to existing ways like synthetic ones.

Method used

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  • Synthesis of N-methylmethyl carbamate
  • Synthesis of N-methylmethyl carbamate
  • Synthesis of N-methylmethyl carbamate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: catalyst is NaOH

[0027] 1,3-Dimethylurea (14.91g, 169.2mmol), NaOH (0.81g, 20.30mmol) and 15.23g of dimethyl carbonate were added into a 50mL stainless steel reaction kettle. At 0.1MP, 150 ° C under closed stirring reaction for 6h. The result is:

[0028] DMU conversion rate%

Embodiment 2

[0029] Embodiment 2: Catalyst is DBTO

[0030] Will Bu 2 SnCl 2 (9.48g, 31.2mmol) was dissolved in 30mL of diethyl ether, stirred, set aside, and set aside. Add 30mL of 10% NaOH solution into a 100mL three-necked flask equipped with a thermometer, a stirring distillation device, and a dropping funnel, heat it to 50°C, and slowly add the above-mentioned clear diethyl ether solution dropwise under stirring, and at the same time recover the distilled water with a distillation device. Ether was released, and after dripping, the reflux device was changed to boil the solution for 0.5h. The white precipitate was filtered off. Wash with distilled water until neutral, and dry to obtain DBTO as a white granular solid.

[0031] 1,3-Dimethylurea (1.35g, 15.34mmol), DBTO (0.15g, 0.60mmol) and 15.23g of dimethyl carbonate were added into a 50mL stainless steel reaction kettle. Dimethyl carbonate acts as both a reactant and a reaction solvent. In 0.1MP, 150 ° C closed stirring reaction...

Embodiment 3

[0033] Embodiment 3: catalyst is MgO

[0034] 1,3-Dimethylurea (1.35g, 15.34mmol), MgO (0.061g, 1.53mmol) and 15.23g of dimethyl carbonate were added into a 50mL stainless steel reaction kettle. Dimethyl carbonate acts as both a reactant and a reaction solvent. At 2.0MP, 160 ° C under closed stirring reaction for 10h. The result is:

[0035] DMU conversion rate%MMC yield%

[0036] 63.140.4

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Abstract

The invention relates to synthesis of N-methylmethyl carbamate, which comprises the following steps: adding dimethyl carbonate and 1,3-dimethylurea in a mol ratio of (15-1):1 and a catalyst into a stainless steel reaction kettle, wherein the catalyst accounts for 1-12 mol% of the raw material 1,3-dimethylurea; and reacting in the closed reaction kettle at 80-200 DEG C under the reaction pressure of 0.1-5.0 MPa for 0.5-10 hours to obtain the N-methylmethyl carbamate. The method has the advantages of mild reaction conditions and simple process, and is easy to operate; and the generated MMC is high in yield and easy to separate.

Description

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Claims

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Application Information

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Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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