Abstract:
본 발명의 유기금속화합물은 하기 화학식 1로 표시되는 것을 특징으로 한다. 상기 유기금속화합물은 이산화탄소와 알코올의 반응성을 향상시켜 탄산에스테르를 고수율로 제조할 수 있다. [화학식 1] M a 3 + [M b (OR 1 ) 5 ] 3 - 상기 화학식 1에서, M a 는 세륨이고, M b 는 4족 또는 14족 금속이며, R 1 은 탄소수 1 내지 10의 탄화수소기이다.
Abstract:
본 발명의 디메틸카보네이트의 제조방법은 세륨 옥사이드(CeO 2 ) 및 징크 옥사이드(ZnO) 중 1종 이상 포함하는 금속산화물 담체에 담지된 촉매를 포함하는 담지 촉매 존재 하에, 메탄올 및 이산화탄소를 반응시키는 단계를 포함하며, 상기 촉매는 니켈 옥사이드(NiO) 및 지르코늄 옥사이드(ZrO 2 )의 금속산화물 중 1종 이상을 포함하는 것을 특징으로 한다. 상기 담지 촉매는 산-염기 특성이 향상되어 메탄올과 이산화탄소로부터 디메틸카보네이트를 고수율로 제조할 수 있다.
Abstract:
PURPOSE: A catalyst system for the synthesis of aromatic carbonate synthesis and a manufacturing method of an aromatic carbonate from the dialkyl carbonate using the same are provided to manufacture aromatic carbonate in a high yield even in low reacting temperature as using dialkyl carbonate as reaction material not the carbon monoxide, making the speed of esterification reactions of dialkyl carbonate faster as having high catalyst activation, and reduce the byproducts of ether. CONSTITUTION: A catalyst system for the synthesis of aromatic carbonate comprises the titan type catalyst and the organic acid group co-catalyst. The titan type catalyst is selected more than one from the group of titan type catalyst which indicated as chemical formula 1 and 2. In the chemical formula 1, R1 is alkyl group of carbon number 1-10 or aryl group of carbon number 6-12. I is an integer between 0 and 4, m is 0 or 1, n is an integer between 0 and 4. When l, m and n are all 0, this case will be excluded. When m is 0, l+n is 4. When m is 1, l+n is 2. In the chemical formula 2, R2 is alkyl group of carbon number 1-10 or aryl group of the carbon number 6-12. K is an integer between 0 and 10. Organic acid group co-catalyst is selected more than one from the group of sulfonic acid group co-catalyst which indicated as chemical formula 3 and carboxylate acid group co-catalyst which indicated as R4COOH.
Abstract:
PURPOSE: A manufacturing method of an aromatic carbonate is provided to able to manufacture an aromatic carbonate with high yield even in low reaction temperature by not using carbon monoxide, but dialkyl carbonate as a reaction raw material. CONSTITUTION: A manufacturing method of an aromatic carbonate comprises a step of reacting an aromatic hydroxy compound and a dialkyl carbonate under the presence of at least one kind or more of samarium based catalysts in chemical formula 1: S_mX_3, or chemical formula 2. In chemical formula 1, X is C1-10 alkoxy, alkylphenoxy, or phenoxy. In chemical formula 2, R1 and R2 is respectively hydrogen or C1-6 alkyl group. The used amount of the catalyst is 1 × 10^(-5) - 5 × 10^(-1) mole per 1 mole of the dialkyl carbonate.