摘要:
An object of the present invention is to provide a catalyst for glycerin dehydration reaction for producing unsaturated aldehyde and unsaturated carboxylic acid at higher yield by a dehydration reaction of glycerin, and that can reduce a decrease in time of the conversion ratio of glycerin and the yields of unsaturated aldehyde and of unsaturated carboxylic acid. Another object of the present invention is to provide a catalyst for glycerin dehydration reaction that can produce acrolein and acrylic acid at higher yield by the dehydration reaction of glycerin, and the catalyst has a longer life. Still another object of the present invention is to provide a method for preparing the catalysts above. A catalyst for glycerin dehydration comprising a carrier, wherein the carrier includes at least one metal oxide selected from the group consisting TiO2, SiO2, Al2O3, ZrO2, and Nb2O5, wherein the carrier includes a bimodal porous structure in which the volume ratio between a pore volume of mesopores having a pore size of more than 2 nm to less than 50 nm to a pore volume of macropores having a pore size of 50 nm or more is equal to or more than 0.5, and wherein the carrier configures to support a W-containing metal oxide thereon or a metal oxide containing at least one element selected from the group consisting of P, Si, Mo, and V, in addition to the W-containing metal oxide thereon, and to cause a catalytic dehydrogenation reaction with glycerin to produce acrolein and acrylic acid.
摘要翻译:本发明的目的是提供一种用于甘油脱水反应的催化剂,其通过甘油的脱水反应以更高的产率生产不饱和醛和不饱和羧酸,并且可以减少甘油的转化率和产率的时间的减少 的不饱和醛和不饱和羧酸。 本发明的另一个目的是提供一种用于甘油脱水反应的催化剂,其可以通过甘油的脱水反应以更高的产率生产丙烯醛和丙烯酸,并且催化剂具有更长的使用寿命。 本发明的另一个目的是提供一种制备上述催化剂的方法。 一种用于甘油脱水的催化剂,其包含载体,其中所述载体包括选自TiO 2,SiO 2,Al 2 O 3,ZrO 2和Nb 2 O 5中的至少一种金属氧化物,其中载体包括双峰多孔结构,其中孔 孔径为50nm以上的大孔的细孔容积大于2nm〜小于50nm的介孔的体积为0.5以上,并且其中载体配置为支持W- 含有金属氧化物的金属氧化物或含有选自P,Si,Mo和V中的至少一种元素的金属氧化物,并且与其上的含W金属氧化物一起,并且与甘油进行催化脱氢反应以产生 丙烯醛和丙烯酸。
摘要:
An object of the present invention is to provide a cover that is made less prone to be removed even if receiving an impact due to falling or the like, and an operation for removing the cover is made easy. An engaging piece position regulating member made of a viscoelastic body such as an urethane-based resin is provided on a left side of an elastically-deformable engaging piece of a cover, which allows an engaging projection of the engaging piece to leave from an engaging hole when the cover is removed from a device casing by manual operation and inhibits the engaging projection of the engaging piece from leaving from the engaging hole when a rate of deformation larger than a rate of deformation by manual operation is provided to the engaging piece by an impact due to falling or the like.
摘要:
The method of manufacturing a semiconductor device includes forming an insulating film of a silicon compound-group insulation film; forming an opening in the insulation film, applying an active energy beam in an atmosphere containing hydrocarbon gas to form a barrier layer of a crystalline SiC, and forming an interconnection structure of copper in the opening with the barrier layer formed in.
摘要:
A control state of the vehicle is switched upon operation of a control switch. Besides, a mode of travel for a travel of a vehicle is selected by operation of a travel mode selection portion. Then, it is determined whether the recommended control state recommended for the selected mode of travel and the actual control state are the same. If it is determined that they are not the same, that is, that there is a deviation between the recommended control state and the actual control state, an operation method for a control switch for realizing the control state recommended for the selected mode of travel is presented to a driver.
摘要:
The method of manufacturing a semiconductor device includes forming an insulating film of a silicon compound-group insulation film; forming an opening in the insulation film, applying an active energy beam in an atmosphere containing hydrocarbon gas to form a barrier layer of a crystalline SiC, and forming an interconnection structure of copper in the opening with the barrier layer formed in.
摘要:
To provide an insulating film material that can be advantageously used for forming an insulating film having a low dielectric constant and excellent resistance to damage, such as etching resistance and resistance to liquid reagents, a multilayer interconnection structure in which a parasitic capacitance between the interconnections can be reduced, efficient methods for manufacturing the multilayer interconnection structure, and an efficient method for manufacturing a semiconductor device with a high speed and reliability. The insulating film material contains at least a silicon compound having a steric structure represented by Structural Formula (1) below. where, R1, R2, R3, and R4 may be the same or different and at least one of them represents a functional group containing any of a hydrocarbon and an unsaturated hydrocarbon.
摘要:
An insulating film material, which contains a polycarbosilane compound expressed by the following structural formula 1; where R1 may be the same or different to each other in the unit repeated “n” times, and each represents C1-4 hydrocarbon or aromatic hydrocarbon; R2 may be the same or different to each other in the unit repeated “n” times, and each represents C1-4 hydrocarbon or aromatic hydrocarbon; n is an integer of 5 to 5,000.
摘要:
In a semiconductor substrate of a first conductivity type, first to third drain offset regions of a second conductivity type are formed in that order in a bottom up manner. A body region of the first conductivity type is formed partly in the second drain offset region and partly in the third drain offset region. The second drain offset region has a lower impurity concentration than the first and third drain offset regions. A curvature portion of the body region is located in the second drain offset region.
摘要:
A brake control device that controls braking forces applied to wheels to stabilize the behavior of a vehicle turning a corner, and includes a turning condition detection unit detecting a turning condition of the vehicle; a braking amount setting unit setting braking amounts for the respective wheels based on the turning condition detected by the turning condition detection unit; a brake control unit applying braking forces to the wheels according to the braking amounts set by the braking amount setting unit; and a road surface friction coefficient estimation unit estimating a road surface friction coefficient of the road on which the vehicle is running. The braking amount setting unit changes upper limits of the braking amounts for the respective wheels according to the road surface friction coefficient when the vehicle is in a center differential lock mode or a direct four-wheel drive mode.
摘要:
It is an object of the present invention to provide a catalyst having excellent performance and high mechanical strength for use in the production of methacrylic acid.A method for manufacturing a catalyst comprising essential active components of molybdenum, phosphorus, vanadium, cesium, ammonia, copper, and antimony for use in the production of methacrylic acid, comprising drying a slurry prepared by mixing a compound(s) containing the essential active components with water and then calcining the resulting dry powder and molding the calcined powder.