Method for producing carbonate esters, and catalytic structure for producing carbonate esters
A manufacturing method and carbonate technology, which are used in catalyst activation/preparation, physical/chemical process catalysts, carbon dioxide or inorganic carbonate preparation, etc., can solve the problems of easy pulverization of cerium oxide powder, achieve excellent efficiency, inhibit powder effect of disintegration and disengagement
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Embodiment 1
[0155] 1. Manufacture of catalyst structure
[0156] Cerium oxide (manufactured by Solvay Special Chem Japan, HSA-20SP, average particle diameter of about 10 μm, impurity concentration of 0.02% or less) was fired at 873 K in an air atmosphere for 3 hours to obtain a powdery solid catalyst. Specifically, 20 g of cerium oxide was placed in a crucible in a muffle furnace (FO310 manufactured by Yamato Scientific Co., Ltd.), and then fired at a temperature increase rate of 10° C. / min to 873 K. The solid catalyst obtained in this way, a silica binder (manufactured by Asahi Chemical Industry Co., Ltd., SUMICERAM, P-750 (mainly a mixture of a siloxane-based binder and water)) and water were adjusted to a weight ratio of 2.05: Weigh in a 1:1 manner, prepare 50 g of the mixed solution for catalyst layer preparation, and fill a 50 cc beaker.
[0157] In addition, in order to prepare the intermediate layer between the catalyst layer and the catalyst-coated substrate, a 50 cc beaker was f...
Embodiment 2～4
[0175] By repeatedly dipping the metal honeycomb in the coating solution containing the cerium oxide powder, about 30 g / m of cerium oxide is adhered. 2 , 70g / m 2 , 150g / m 2 , except for this, in the same manner as in Example 1, the catalyst structures of Examples 2 to 4 were produced. The thicknesses of the catalyst layers of the structures obtained in this manner were estimated to be about 20 μm, about 50 μm, and about 100 μm, respectively.
[0176] As a result of reaction evaluation using each catalyst structure, the adhesion of Example 2 was 30 g / m 2 In the catalyst structure of , the DPrC yield reached a high yield of 57 mol%, while the by-product / DPrC was suppressed to 1.2 mol%. In addition, the adhesion of Example 3 was 70 g / m 2 In the catalyst structure of , the DPrC yield reached a high yield of 52 mol%, while the by-product / DPrC was suppressed at 1.4 mol%. In addition, the adhesion of Example 4 was 150 g / m 2 In the catalyst structure of , the DPrC yield reached ...
Embodiment 5
[0178] The same cerium oxide powder and silica binder (Asahi Chemical Industry Co., Ltd., SUMICERAM, P-700-D (mainly silica powder with an average particle size of about 5 μm, siloxane-based binder) as in Example 1 were used. A mixture of catalyst and water)) and water were weighed in a weight ratio of 2:0.95:1.5 to prepare 50 g of the mixed solution for catalyst layer preparation, filling a 50 cc beaker. Except for this, it was carried out in the same manner as in Example 2, and the adhesion 30 g / m of Example 5 was produced. 2 catalyst structure. The thickness of the catalyst layer at this time is estimated to be about 20 μm. As a result of the reaction evaluation using this structure, the yield of DPrC was as high as 54 mol%, and the by-product / DPrC was suppressed to 0.9 mol%. In addition, the cerium oxide powder did not peel off from the base material even after the reaction, and had high adhesiveness.
[0179] It was also confirmed that when each of the structures was s...
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