摘要:
There is provided a process for producing acrolein, which makes it possible to obtain acrolein in high yield by dehydration of glycerin. Glycerin is allowed to coexist with a catalyst containing a rare earth metal salt crystal of phosphoric acid, thereby dehydrating the glycerin, wherein the crystal is obtained by calcining a solid which is formed by allowing a liquid containing water and a hydroxide of the rare earth metal and/or a dehydration condensate of the hydroxide to contain phosphate ions.
摘要:
There is provided a process for producing acrolein, which makes it possible to obtain acrolein in high yield by dehydration of glycerin. Glycerin is allowed to coexist with a catalyst containing a rare earth metal salt crystal of phosphoric acid, thereby dehydrating the glycerin, wherein the crystal is obtained by calcining a solid which is formed by allowing a liquid containing water and a hydroxide of the rare earth metal and/or a dehydration condensate of the hydroxide to contain phosphate ions.
摘要:
A catalyst for glycerin dehydration of the present invention comprises boron phosphate or a rare-earth metal phosphate, wherein a molar ratio P/B of phosphorus (P) to boron (B) or a molar ratio P/R of phosphorus (P) to a rare-earth metal (R) is more than 1.0 and 2.0 or less. An another catalyst for glycerin dehydration of the present invention comprises a combination of boron phosphate and a metal element or a combination of a rare-earth metal phosphate and a metal element other than a rare-earth metal, wherein a molar ratio M/(P+B) of a metal element (M) to phosphorus (P) and boron (B) or a molar ratio M/(P+R) of a metal element (M) to phosphorus (P) and a rare-earth metal (R) is more than 0.00005 and 0.5 or less.
摘要:
The present invention provides a process for producing acrolein, which exhibits a prolonged catalyst life, low energy consumption, and excellent efficiency, and which is earth-conscious, and a glycerin-containing composition which can preferably be used even in this process. The process for producing acrolein is one which includes bringing a raw material gas containing glycerin gas into contact with a solid acid catalyst in a reactor, and the partial pressure of the glycerin gas in the raw material gas is set to be from 0.01 to 30 kPa. The glycerin-containing composition is for use in a process for producing acrolein using a solid catalyst and includes a fatty acid and/or a fatty acid ester, and a total mass of the fatty acid and the fatty acid ester is from 0.001% to 5% by mass, relative to the glycerin.
摘要:
The present invention provides a process for producing acrolein, which exhibits a prolonged catalyst life, low energy consumption, and excellent efficiency, and which is earth-conscious, and a glycerin-containing composition which can preferably be used even in this process. The process for producing acrolein is one which includes bringing a raw material gas containing glycerin gas into contact with a solid acid catalyst in a reactor, and the partial pressure of the glycerin gas in the raw material gas is set to be from 0.01 to 30 kPa. The glycerin-containing composition is for use in a process for producing acrolein using a solid catalyst and includes a fatty acid and/or a fatty acid ester, and a total mass of the fatty acid and the fatty acid ester is from 0.001% to 5% by mass, relative to the glycerin.
摘要:
A data transfer control device that selects one of a plurality of DMA channels and transfers data to or from memory includes a request holding section configured to hold a certain number of data transfer requests of the plurality of DMA channels and a request rearranging section configured to select and rearrange the data transfer requests that are held in a basic transfer order so that the data transfer requests of each of the plurality of DMA channels are successively outputted for a number of successive transfers set in advance.
摘要:
A high-quality spray product that uses a less expensive propellant exhibiting a lower ozone-depleting potential and a lower global warming potential without using any fluorocarbon, any alternative thereto, etc., and exhibits an improved safety and an improved liquid retention. A dust blower as the spray product uses a propellant composed of a mixture of dimethyl ether and carbon dioxide, and an absorbent adapted to retain the propellant, which is composed of an assembly of pulverized cellulose fibers such that the cellulose fibers include at least 45 mass % of fine cellulose fibers having a fiber length of 0.35 mm or less. The propellant and the absorbent are charged in a spray can having a spray nozzle, thereby preparing a dust blower.
摘要:
A liquid-absorbent sheet containing: a liquid-absorbent surface material mainly containing a pulp; a liquid-absorbent nonwoven fabric; a liquid-absorbent rear material mainly containing a pulp; and a super absorbent polymer; wherein the super absorbent polymer is disposed at least between the liquid-absorbent surface material and the liquid-absorbent nonwoven fabric as an A layer and between the liquid-absorbent nonwoven fabric and the liquid-absorbent rear material as a B layer, the super absorbent polymer being contained in a total amount of 200 to 400 g/m2, which is allocated in the A layer at 30 to 50% by mass, the liquid-absorbent nonwoven fabric layer at 0 to 40% by mass, and the B layer at 30 to 70% by mass, and the content ratio of the super absorbent polymer in the A layer is less than or equal to the content ratio of the super absorbent polymer in the B layer.
摘要翻译:一种吸液性片材,其特征在于,包含:主要含有纸浆的吸液性表面材料; 吸液性无纺布; 主要含有纸浆的吸液后材料; 和高吸水性聚合物; 其特征在于,所述超吸收性聚合物至少设置在作为A层的吸液性表面材料和吸液性无纺布之间,作为B层设置在吸液性无纺布和吸液性后材之间,超吸收性聚合物 聚合物的总量为200〜400g / m 2,分配在A层中30〜50质量%,吸液性无纺布层为0〜40质量%,B层为 30〜70质量%,A层中的高吸水性聚合物的含有比例低于或等于B层中的高吸水性聚合物的含有比例。
摘要:
Upon detection of the attachment of a recording medium, an image signal obtained by taking a picture and condition information representing a condition in which the picture is taken are read out from a memory in an image pickup apparatus and recorded on the recording medium. The apparatus is also arranged in such a manner that the condition information recorded on the recording medium may be transferred to the memory. With this arrangement, it becomes possible to process the image signal by using the condition information stored in the memory, even in a situation in which the recording medium is detached. Furthermore, it becomes possible to inherit the condition information even when the recording medium is exchanged.
摘要:
Individual images included in a multi-frame image can be reproduced in an enlarged scale by an easy operation. Information indicating the number of split frames of a multi-frame image and information indicating the number of photographed images included in the multi-frame image are recorded on a recording medium together with images constituting the multi-frame image. In the reproduction mode, each of images constituting the multi-frame image is reproduced and output on one frame with reference to the reproduced information indicating the number of split frames of the multi-frame image and the reproduced information indicating the number of photographed images included in the multi-frame image.