摘要:
An improvement to a process for thermal cracking a heavy hydrocarbon oil comprising (1) a thermal cracking step of the heavy oil which is in contact with a fluidized bed of heated fine particles as a source of the heat required for the thermal cracking and (2) a regeneration step of the fine particles which are withdrawn from the thermal cracking step and on which coke formed during the thermal cracking has deposited, the steps (1) and (2) being practiced while the fine particles are circulated therebetween, is disclosed. The improvement comprises a use as the fine particles of microspheres of a porous material, division of the regeneration step into a gasification section and a combustion section, and restriction in the operation conditions, and an optional temperature control by controlling generation of steam in a cooling means which is installed in the combustion section and whose coolant is water to generate the steam.
摘要:
The present invention provides a method for producing .beta.-methylnaphthalene from an inexpensive and easily available feed oil. According to the invention, highly pure .beta.-methylnaphthalene adequate for industrial use can be mass-produced at reduced costs. The method comprises catalytic hydrodealkylation of a feed oil containing an alkyl naphthalene having at least two methyl groups in the presence of a catalyst having at least one metal species of selected from the group consisting of vanadium (V), chromium (Cr), nickel (Ni), rhodium (Rh), platinum (Pt), iridium (Ir), and compounds of these metals as an active component and a carrier therefor containing at least one of alumina and silica as its primary component, with a hydrogen partial pressure of 1 to 50 kgf/cm.sup.2, at a temperature of 450.degree. C. to 650.degree. C., and for a contact time of 3 to 35 seconds. The method of the invention is excellent in that it affords .beta.-methylnaphthalene of a chemical grade with a high yield.
摘要翻译:本发明提供一种从便宜且容易获得的原料油中生产β-甲基萘的方法。 根据本发明,可以以降低的成本批量生产适用于工业用途的高纯度β-甲基萘。 该方法包括在具有选自钒(V),铬(Cr),镍(至少一种)的至少一种金属种类的催化剂存在下,含有具有至少两个甲基的烷基萘的进料油的催化加氢脱烷基化 Ni),铑(Rh),铂(Pt),铱(Ir),以及作为活性成分的这些金属的化合物和其中含有氧化铝和二氧化硅作为其主要成分中的至少一种的载体,氢分压 1〜50kgf / cm 2,温度450〜650℃,接触时间3〜35秒。 本发明的方法优点在于它以高产率提供化学级的β-甲基萘。
摘要:
A conductive lead 21 or 22 welded to a positive electrode 11 or a negative electrode 12 protrudes from the upper surface side and the lower surface side of an electrode group 10. The conductive leads 21 and 22 have spiral shape portions 21b and 22b and end portions 21c and 22c for welding, respectively. The end portion 21c for welding of the conductive lead 21 is welded to a lid unit 5, and the end portion 22c for welding of the conductive lead 22 is welded to a can bottom 203 of a battery can 2. The end portion 22c for welding of the conductive lead 22 is positioned corresponding to a hollow portion 15a of an axial core 15.
摘要:
Methods and apparatuses process signals. The method according to one aspect of the present invention receives a first signal; obtains a second signal and a third signal from the first signal, wherein a gain of the second signal is smaller than a gain of the third signal; detects saturation in the third signal; and generates a composite signal from the second signal and the third signal, the step of generating a composite signal including selecting a part of the second signal for the composite signal, when the detecting step detects saturation in the third signal, and selecting a part of the third signal for the composite signal, when the detecting step does not detect saturation in the third signal.
摘要:
Disclosed is a membrane-electrode assembly including an anode, a cathode, and a proton-conductive polymer electrolyte membrane and further including a diffusion enhancing layer disposed between the cathode and the proton-conductive polymer electrolyte membrane. The membrane-electrode assembly and a direct methanol fuel cell using the same work to effectively eliminate product water and electrolyte membrane-permeated water remaining in the vicinity of the interface between the cathode and the electrolyte membrane to feed a reaction gas sufficiently to the vicinity of the interface between the cathode and the electrolyte membrane, and exhibit high performance stably over a long period of time.
摘要:
A quantitative echo sounder includes delay circuits, phase correction circuits, an incidence angle calculator and a directivity correction unit. The delay circuits adjust transmission start timing or phases of acoustic waves radiated by individual vibrating elements based on pitch and roll angles measured by a motion sensing device so that the direction of an acoustic axis of a transmitting beam matches a sounding direction. The phase correction circuits adjust phases of received echo signals based on the pitch and roll angles so that the direction of an acoustic axis of a receiving beam matches the sounding direction. The incidence angle calculator calculates echo signal incidence angle with respect to the sounding direction from phase differences among receiving beam signals obtained by four vibrating element groups. The directivity correction unit corrects a measured target strength by using the echo signal incidence angle calculated by the incidence angle calculator.
摘要:
A fuel cell power source is provided with a means for feeding a liquid fuel cell and water through time-sharing with the use of a single pump so as to maintain concentration of the liquid fuel, thereby it is possible to decrease the number of accessories in order to reduce the size of the fuel cell power source and as well to reduce the costs.
摘要:
There is provided a radar reflector apparatus that is mounted in a lifeboat or a small rescue boat or in a floating buoy used for salvage or search practice, or is used by itself independently, to serve as a radar wave reflector of a search radar. The radar reflector apparatus has a simple structure, and is folded when not in use, and when used, is unfolded automatically when dropped by a marine vessel or aircraft or the like.
摘要:
A method of fabricating a silicon single crystal ingot and a method of fabricating a silicon wafer using the ingot, characterized in that: the method is structured in such a manner that the silicon single crystal ingot is pulled up from the silicon fused liquid 7 in which nitrogen N and carbon C are doped in polycrystalline silicon, by using the Czochralski method, and its nitrogen density is 1×1013-5×1015 atoms/cm3, and the carbon density is 5×1015-3×1016 atoms/cm3.
摘要翻译:一种制造硅单晶锭的方法和使用该锭制造硅晶片的方法,其特征在于:该方法的结构是这样一种方式构成:将硅单晶锭从硅熔融液体7中拉出,其中, 通过使用Czochralski法将氮N和碳C掺杂在多晶硅中,其氮密度为1×10 13 -5×10 15原子/ cm 3,碳密度为5×10 15 -3×10 16原子/ cm 3。
摘要:
A process for producing 2,6-dimethylnaphthalene by subjecting 2,7-dimethylnaphthalene to an isomerization reaction, wherein the isomerization reaction is carried out by the use of a metallosilicate catalyst that comprises a metallosilicate having a main cavity defined by a ten-oxygen-membered ring, that is in the form of aggregates of fine crystals of the metallosilicate, the external surface area of the aggregate as calculated from t-plot analysis made in the nitrogen adsorption method being 25 m2/g or more, and that has been treated to inactivate acid centers present on the external surfaces of the fine crystals until the rate constant basic value N becomes 0.5 or less.