35466-85-4

Upstream product

• 4544-20-1 2-ethoxy-1,3-dioxolane 
• 114915-54-7 (1,3-dioxolan-2-yl)-ethoxy-1,3-dioxolan-2-yl peroxide 
• 96-49-1 [1,3]-dioxolan-2-one 
• 64-17-5 ethanol 
• 67-56-1 methanol 

Relevant academic research and scientific papers

PROCESS FOR PREPARING ALKANEDIOL AND DIALKYL CARBONATE

The invention relates to a process for the preparation of an alkanediol and a dialkyl carbonate comprising reacting an alkylene carbonate and an alkanol in the presence of a catalyst, wherein the catalyst is aluminum phosphate.

The design of efficient carbonate interchange reactions with catechol carbonate

Catechol carbonate (CC) has been investigated as an innovative and highly active reactant for carbonate interchange reactions (CIRs). Under mild conditions (atmospheric pressure, and 60-80°C), the selective synthesis of symmetric aliphatic carbonates (ROCO2R) has been achieved by the reaction of a slight excess of both primary and secondary alcohols with CC in the presence of NaOMe or MgO as a catalyst. Quantitative conversions have been reached in only 1 hour and products have been isolated in yields of up to 58% for dibutylcarbonate. Of note is that the reaction of glycerol with CC also proceeded under similar conditions (40-60°C, 1 atm) to afford glycerol carbonate (96-98%). The comparison of the reactivity of CC with that of conventional dialkyl carbonates, including dimethyl carbonate (DMC) and ethylene carbonate (EC), proved the superior performance of CC in all the investigated CIR processes. Accordingly, a mechanism has been formulated based on the leaving group ability of a catecholate anion originating from CC.

Efficient synthesis of dimethyl carbonate via transesterification of ethylene carbonate over a new mesoporous ceria catalyst

Mesoporous ceria materials (CeO2-meso) have been prepared through a soft-templating method using cetyltrimethylammonium bromide as a template and cerium nitrate as a precursor. The synthesized CeO2-meso materials possess narrow pore size distributions of 5.1-5.4 nm and tunable surface areas (109-182 m2 g-1). As heterogeneous catalysts in the transesterification of ethylene carbonate (EC) with methanol to dimethyl carbonate (DMC), CeO2-meso materials demonstrate superior catalytic performance to the commercial ceria. N2 adsorption-desorption and CO2-TPD characterization results indicate that the catalytic activity obtained over various CeO2-meso samples depends on their surface areas and basicity. The highest activity is achieved over CeO 2-meso-400, affording a DMC yield as much as 73.3%, together with excellent recycling ability. Besides the transesterification of EC with methanol, CeO2-meso is found to be able to catalyze the reactions of other cyclic carbonates and alcohols. In view of the high catalytic performance along with the convenience in catalyst preparation, CeO2-meso-400 compares favorably with the ionic liquids as well as other ceria-based catalytic systems.

PRODUCING PROCESS DIALKYL CARBONATE

An object of the present invention is to provide an industrially advantageous process for simultaneously producing a symmetric dialkyl carbonate and an asymmetric dialkyl carbonate by performing a transesterification reaction of an alkylene carbonate with two or more kinds of alcohols; and a process for efficiently producing diethyl carbonate in high purity by performing transesterification of ethylene carbonate or propylene carbonate with ethanol, The present invention relates to a process for simultaneously producing a symmetric dialkyl carbonate and an asymmetric dialkyl carbonate, comprising performing a transesterification reaction of an alkylene carbonate with two or more kinds of alcohols in the same reactor, and a process for producing diethyl carbonate, comprising performing a transesterification reaction of ethylene carbonate or propylene carbonate with ethanol, wherein the process comprises a step of subjecting the reaction product obtained in the transesterification reaction to extractive distillation using ethylene glycol or propylene glycol as the extraction solvent to separate by distillation a fraction containing an ether compound.