摘要:
There are disclosed a new L-type zeolite and a catalyst comprising said zeolite, having a high and persistent catalytic activity for a long-term production of aromatic hydrocarbon and a process for efficiently producing aromatic hydrocarbons from nonaromatic hydrocarbon by the use of the catalyst. The L-type zeolite with both platinum components and halogen components supported thereon, has a peak intensity of 0.4 or less as determined by XANES and a small amount of dealuminization.
摘要:
A process for producing aromatic hydrocarbons comprising contacting at least one hydrocarbon of the paraffin series, olefin series, acetylene series, cyclic paraffin series or cyclic olefin series with a catalyst containing an L-type zeolite containing both platinum components and halogen components supported thereon, the catalyst having a peak intensity of 0.4 or less as determined by X-ray absorption near edge structure (XANES), and the amount of dealuminization in the zeolite is 3% by weight or less, based on the total amount of aluminum therein.
摘要:
A catalytic reforming process comprising the catalytic conversion of hydrocarbons to aromatics, said process comprising treating a halided zeolite catalyst (hiz-cat) containing a Group VIII metal at commercial startup conditions and then reforming hydrocarbons, wherein said catalyst is prepared by washing a bound zeolite catalyst base or a bound zeolite catalyst before halide addition. A preferred hiz-cat is a non-acidic Pt K L-zeolite catalyst prepared by a process that includes the steps of preparing a calcined silica-bound K L-zeolite catalyst base; washing said bound zeolite catalyst base with a liquid comprising water; and incorporating Pt and halogen-containing compound(s) comprising chlorine and fluorine into said washed catalyst base. Ammonium chloride and ammonium fluoride are preferred halide sources.
摘要:
A catalytic reforming process comprising the catalytic conversion of hydrocarbons to aromatics, said process comprising treating a halided zeolite catalyst (hiz-cat) containing a Group VIII metal at commercial startup conditions and then reforming hydrocarbons, wherein said catalyst is prepared by washing a bound zeolite catalyst base or a bound zeolite catalyst before halide addition. A preferred hiz-cat is a non-acidic Pt K L-zeolite catalyst prepared by a process that includes the steps of preparing a calcined silica-bound K L-zeolite catalyst base; washing said bound zeolite catalyst base with a liquid comprising water; and incorporating Pt and halogen-containing compound(s) comprising chlorine and fluorine into said washed catalyst base. Ammonium chloride and ammonium fluoride are preferred halide sources.
摘要翻译:一种催化重整方法,包括将烃催化转化成芳族化合物,所述方法包括在商业启动条件下处理含有第Ⅷ族金属的卤化沸石催化剂(氢氧化钾),然后重整烃,其中所述催化剂是通过洗涤结合的沸石 催化剂底物或结合的沸石催化剂。 优选的咪唑是通过包括以下步骤制备的非酸性Pt K L-沸石催化剂,所述方法包括制备煅烧二氧化硅结合的KL-沸石催化剂基质的步骤; 用包含水的液体洗涤所述结合的沸石催化剂基质; 并将含有氯和氟的Pt和含卤素的化合物掺入所述洗涤的催化剂基质中。 氯化铵和氟化铵是优选的卤化物源。
摘要:
The present invention aims at reducing the time required for a series of analyses in the sequential performance of gradient analyses under a variety of conditions. To this end, in a control apparatus for controlling the operation of a liquid chromatograph having a gradient analysis function in which a mobile phase composed of a plurality of mixed solvents is used and a chromatograph analysis is performed while the mixture ratio of the solvents is temporally changed, the liquid chromatograph is controlled so as to continuously change the mixture ratio of the solvents from an initial mixture ratio to a final mixture ratio when performing a sample analysis; and as to perform, before the sample analysis, a preparatory liquid supply in which the mixture ratio of the solvents is continuously changed from the initial mixture ratio to the final mixture ratio at a rate higher than that in the sample analysis.
摘要:
The present invention includes a first switch 4a, a second switch 4b and a capacitor 4d. The first switch 4a normally in a closed state is connected in series between a power source 1 and load, and opens when an accident builds up. The second switch 4b normally in an open state closes almost simultaneously with the opening of the first switch 4a. The capacity 4d normally charged by an arbitrary voltage has predetermined electrically capacity. The serial connected circuit consists of the second switch 4b and capacitor 4d, it is connected in parallel to the first switch 4a.
摘要:
An operation apparatus of a circuit breaker provided with a mobile contact and a fixed contact, the mobile contact is pressed against the fixed contact or drawn apart from the fixed contact, comprising an operation rod fixed to the mobile contact and held to be movable with respect to the fixed contact, a mobile member movably connected to the operation rod, a relative movable range of the mobile member to the operation rod being limited within a predetermined value, a first elastic member for urging the operation rod with respect to the mobile member in a direction in which the mobile contact is pressed against the fixed contact, a fixed member for movably holding the mobile member, a second elastic member for urging the mobile member with respect to the fixed member in a direction in which the mobile contact is drawn apart from the fixed contact, a permanent magnet for driving the mobile member with respect to the fixed member in a direction in which the mobile contact is pressed against the fixed contact, an operation electromagnet for applying a magnet force to the permanent magnet so as to drive the mobile member, and a power supply circuit for energizing the operation electromagnet.
摘要:
According to the present invention, there is provided a magnetic disk memory system. An embodiment of this system comprises a magnetic disk of a perpendicular recording type, including a soft magnetic backing layer and a magnetic recording layer of a perpendicular magnetic anisotropy formed on the backing layer, and a magnetic head for writing or reading of data with respect to the magnetic disk, wherein the magnetic head comprises (a) a pair of main magnetic poles each of which made of a material having a high magnetic permeability, one end of the each pole being located so as to face the magnetic disk surface, (b) a non-magnetic interlayer provided between two main magnetic poles of the pair, (c) a recording coil disposed so as to generate a magnetic flux passing through the magnetic disk via the main magnetic poles, and (d) an MR element provided via an insulation layer on the other ends of the pair of main magnetic poles, one MR element having a film surface parallel to end surfaces of the other ends of the main magnetic poles, and being magnetically coupled with the pair of main magnetic poles.
摘要:
Disclosed is a silicone-based antifoam composition capable of exhibiting high defoaming activity even at a high temperature with excellent durability so as to be useful in dyeing processes. The composition comprises, as the principal ingredient, a polyoxyalkylene-modified polydimethylsiloxane, of which, different from conventional polyoxyalkylene-modified polydimethylsiloxanes, the polyoxyalkylene groups consist of two different types relative to the molar proportion of the oxyethylene units and oxypropylene units, in addition to a silicone oil compound of a silica filler, a poly(oxyethylene-oxypropylene) copolymer and low-molecular polydimethylsiloxane terminated at each molecular chain end with a dimethyl hydroxy silyl group.
摘要:
This invention discloses a fiber treatment agent characterized in that it comprises:(A) 100 parts by weight of an organopolysiloxane with no less than 2 hydroxyl groups and/or alkoxyl groups bonded to Si atoms per molecule,(B) 0.5-50 parts by weight of silica and/or a polysilsesquioxane,(C) 0.1-20 parts by weight of an organoalkoxysilane containing amide groups and carboxyl groups, and/or its partial hydrolysis condensate,(D) 0.1-20 parts by weight of an organoalkoxysilane containing amino groups or epoxy groups and/or its partial hydrolysis condensate, and(E) 0.01-10 parts by weight of a curing catalyst, and characterized in that it is also a cationic or non-ionic emulsion.