摘要:
A process for producing an alcohol from a fatty acid ester, a fatty acid triglyceride or a fatty acid by continuously catalytically reducing the starting material in the presence of a hydrogenation catalyst is disclosed. In the process of the present invention, two reactors (i.e., the main reactor located upstream and the after reactor located downstream) being located in series are employed. In the process of the present invention, two reactors are employed and the temperatures thereof are individually controlled, whereby the conversion ratio is elevated while suppressing the formation of hydrocarbon and aldehyde by-products. Thus, an alcohol of extremely high quality and high purity can be produced. Further, the process of the present invention makes it possible to omit any post-treatment for eliminating the by-products. Furthermore, the active life of the hydrogenation catalyst can be remarkably prolonged by using three reactors (i.e., the guard reactor, the main reactor and the after reactor).
摘要:
A process for producing an alcohol by continuously passing a fatty acid ester, a fatty acid triglyceride or a fatty acid through a hydrogenation catalyst to thereby produce the aimed alcohol through catalytic reduction is disclosed, wherein the employed reactor is a fixed bed reactor in which the liquid phase and the gas phase are continuously passed together in descending parallel flows through the hydrogenation catalyst fixed in the reactor; and at least one cooling mean for cooling the reaction system is provided at a position in the vertical direction of the reactor. According to the process of the present invention with the use of a fixed bed reactor, an alcohol, which has extremely high qualities and a high purity and is contaminated with little hydrocarbon and aldehyde by-products, can be produced. The process of the present invention further makes it possible to omit the post-treatment for eliminating the by-products.
摘要:
A process for producing desulfurized fats and oils or fatty acid esters is disclosed, which comprises treating fats and oils or fatty acid esters under hydrogen or a mixture of hydrogen and an inert gas atmosphere at a pressure of from 0.1 to 500 kg/cm.sup.2 in the absolute pressure at a temperature of from 100.degree. to 350.degree. C. in the presence of a catalyst of the following formula (I):Cu.multidot.X.sub.x .multidot.Y.sub.y .multidot.O.sub.z (I)wherein all symbols are defined in the disclosure. A process for producing an alcohols using desulfurized fats and oils or fatty acid esters is also disclosed. According to the process for producing an alcohol of the present invention, an alcohol of a high purity and good qualities can efficiently and effectively be produced.
摘要翻译:公开了一种生产脱硫脂肪和油或脂肪酸酯的方法,其包括在氢气或氢气和惰性气体气氛下以0.1-500kg / cm 2的压力下在脂肪和油或脂肪酸酯中的处理 在下式(I)的催化剂存在下,在100℃至350℃的温度下的绝对压力:其中所有符号在本公开中定义的CuxXxxYyxOz(I)。 还公开了使用脱硫脂肪和油或脂肪酸酯制备醇的方法。 根据本发明的醇的制造方法,可以有效且高效地制造纯度高,品质好的醇。
摘要:
A process for producing alcohols comprising catalytically reducing fats and oils or fatty acid esters with hydrogen in the presence of a catalyst for ester reduction is disclosed, wherein the starting oils are first treated at a temperature of from 50.degree. to 200.degree. C. in hydrogen gas or a mixed gas of hydrogen and an inert gas in the presence of a nickel catalyst to yield a sulfur content at not more than 0.6 ppm an acid value (KOH mg/g) of not more than 2. By use of the thus purified starting oils, the catalyst for ester reduction exhibits a prolonged duration.
摘要:
An image capturing device having a function of clamping an image signal. When the image capturing device is activated, a synchronous signal generating section begins creation of a horizontal synchronous signal, and a counter begins counting a pulse of the horizontal synchronous signal. When the counted value reaches a predetermined value, the clamping capability control section changes the level of a clamp mode signal to an H level. During a period from the start of power supply to the image capturing device to the raising of the level of a clamp mode signal to an H level, a clamp pulse generating section sets a longer width for a clamp pulse than in a normal operation so that a switch element of a clamping circuit remains in an on state in a longer period, whereby a smaller time constant for clamping is set. After elapse of a predetermined period, the switch element is controlled so as to remain in an ON state in a normal period, which is relatively short, whereby a larger time constant for clamping is set. With this arrangement, noise which would be caused with a small clamping time constant is suppressed.
摘要:
The invention provides a process for producing an alcohol, including the step of hydrogenating a glyceride in the presence of a catalyst, adding water, or a process for producing an alcohol, including the step of hydrogenating a glyceride in the presence of a catalyst and in the presence of from 0.5 or more of water per mole of the starting glyceride.
摘要:
The present invention provides a process for producing lower alkyl fatty esters from fatty acids and lower alcohols, wherein lower alkyl fatty esters are produced in higher yield with a reduction in the amount of the remaining fatty acids. The process of the present invention comprises bringing fatty acids into contact with gaseous lower alcohols in fixed bed(s) charged with a weakly acidic solid catalyst by countercurrent operation, by co-current operation and subsequent countercurrent operation or by pseudo-countercurrent operation, thus feeding and reacting the fatty acids and lower alcohols in fixed-bed reactor(s) charged with a weakly acidic solid catalyst to produce lower alkyl fatty esters.
摘要:
A semiconductor flow velocity sensor having a semiconductor substrate and an electrical heating unit arranged on the substrate. The sensor located in the fluid flow to be measured can electrically detect the radiation from the heating unit which varies depending on the velocity of fluid flow. Thermal insulator is provided between the semiconductor (silicon) substrate and the heating unit so as to thermally shield the substrate from the heating unit. On the thermally isolated area of the substrate is provided an external sensor circuit so as to enable to increase the integration of the sensor.
摘要:
A floating head device has a floating surface for imparting a floating force for floating from a recording surface by air flow formed between the floating surface and the recording surface and a suction surface for imparting a sucking force in a relative movement of a head slider to the recording surface of a recording medium. The air inlet end of the suction surface has grooves and is disposed in down-stream of the air flow from the air inlet end of the floating surface.
摘要:
The invention provides a method of using an alcohol and a primary or secondary amine as the starting material to produce the corresponding secondary amine easily at a high yield and a catalyst used therein. The invention relates to a film-type catalyst for production of a tertiary amine, which is used in producing a tertiary amine from an alcohol and a primary or secondary amine as the starting material, and a process for producing a tertiary amine, which includes reacting an alcohol with a primary or secondary amine in the presence of the film-type catalyst.