Abstract: The invention provides a mixed molecular sieve catalyst, comprising 5-30 wt % Y molecular sieve, 5-30 wt % ZSM-5 molecular sieve and the balance of matrix component and binder component. The invention further provides a method of preparing the mixed molecular sieve catalyst, comprising the following steps: mixing the Y molecular sieve, the ZSM-5 molecular sieve with a matrix material, a binder precursor, a pore former, a dispersant and water to formulate an aqueous slurry; spray drying the slurry; and baking. The invention further provides a method of preparing olefins from methanol with the use of the catalyst. By use of the catalyst of the invention, the selectivity to C3 and C4 olefins is improved significantly.

Abstract: A method of preparing a catalyst, comprising: (1) mixing a ZSM-5 molecular sieve, a phosphorus source, a matrix material, a bonding agent and water to formulate an aqueous slurry, wherein the total content of the components except for water is 20-50 wt % based on the total weight of the aqueous slurry; (2) spray drying the slurry obtained in step (1) to obtain a granular intermediate product; and (3) calcining the granular intermediate product obtained in step (2) to obtain the catalyst used for preparing olefin from methanol in a fluid bed. The invention also provides a catalyst prepared according to said method, and a process of preparing olefin from methanol using said catalyst. In the methanol-to-olefin process, the conversion of methanol is >99%; the propylene selectivity is high; and the C4 selectivity is up to 32%.

Abstract: The invention relates to a catalyst for preparation of butadiene by oxydehydrogenation of butene in a fluidized bed reactor, a method of preparing the same, and use of the same, wherein a method according to an embodiment of the invention comprises: reacting a metal precursor with an alkaline substance to obtain a slurry containing insoluble compound, followed by filtering and washing the slurry; adding a binder and deionized water, followed by agitation to regulate the solid content of the slurry to 10-50%; subjecting the slurry to spray drying granulation, wherein the temperature at the feed port is controlled between 200-400° C., and the temperature at the discharge port is controlled between 100-160° C., to obtain catalyst microspheres; and drying the catalyst microspheres at 80-200° C. for 1-24 h, and then calcining the catalyst microspheres at 500-900° C. for 4-24 h to obtain a catalyst having a general formula of FeXaYbZcOd, comprising Fe, Mg, Zn, Bi, Mo, Mn, Ni, Co, Ba, Ca, and other metals.

Abstract: The invention provides a mixed molecular sieve catalyst, comprising 5-30 wt % Y molecular sieve, 5-30 wt % ZSM-5 molecular sieve and the balance of matrix component and binder component. The invention further provides a method of preparing the mixed molecular sieve catalyst, comprising the following steps: mixing the Y molecular sieve, the ZSM-5 molecular sieve with a matrix material, a binder precursor, a pore former, a dispersant and water to formulate an aqueous slurry; spray drying the slurry; and baking. The invention further provides a method of preparing olefins from methanol with the use of the catalyst. By use of the catalyst of the invention, the selectivity to C3 and C4 olefins is improved significantly.

Abstract: A method of preparing a catalyst, comprising: (1) mixing a ZSM-5 molecular sieve, a phosphorus source, a matrix material, a bonding agent and water to formulate an aqueous slurry, wherein the total content of the components except for water is 20-50 wt % based on the total weight of the aqueous slurry; (2) spray drying the slurry obtained in step (1) to obtain a granular intermediate product; and (3) calcining the granular intermediate product obtained in step (2) to obtain the catalyst used for preparing olefin from methanol in a fluid bed. The invention also provides a catalyst prepared according to said method, and a process of preparing olefin from methanol using said catalyst. In the methanol-to-olefin process, the conversion of methanol is >99%; the propylene selectivity is high; and the C4 selectivity is up to 32%.

Abstract: The invention relates to a catalyst for preparation of butadiene by oxydehydrogenation of butene in a fluidized bed reactor, a method of preparing the same, and use of the same, wherein a method according to an embodiment of the invention comprises: reacting a metal precursor with an alkaline substance to obtain a slurry containing insoluble compound, followed by filtering and washing the slurry; adding a binder and deionized water, followed by agitation to regulate the solid content of the slurry to 10-50%; subjecting the slurry to spray drying granulation, wherein the temperature at the feed port is controlled between 200-400° C., and the temperature at the discharge port is controlled between 100-160° C., to obtain catalyst microspheres; and drying the catalyst microspheres at 80-200° C. for 1-24 h, and then calcining the catalyst microspheres at 500-900° C. for 4-24 h to obtain a catalyst having a general formula of FeXaYbZcOd, comprising Fe, Mg, Zn, Bi, Mo, Mn, Ni, Co, Ba, Ca, and other metals.

Abstract: An audio device or system includes a housing which accommodates a circuit board having a micro control unit located within the housing, at least a speaker, and at least an optical trace detecting module coupled to the micro control unit. The optical trace detecting module at least has a light source and an image sensor for detecting a movement of a user's finger moving thereon so as to generate a corresponding moving signal, which is supplied to the micro control unit to cause the micro control unit to generate a control signal for adjusting a received audio signal. The micro control unit may be used in place of a rotary audio adjustment button or knob.

Abstract: An image displaying device includes a housing accommodating a circuit board, a screen, and at least an optical trace detecting module. The optical trace detecting module has a light source and an image sensor for detecting movement of a user's finger thereon so as to generate and supply a corresponding moving signal to a micro control unit. The micro control unit generates a first control signal for adjusting or switching displayed images on the screen.

Abstract: A die cutting apparatus for forming die cuts from paper and other materials includes a metal base plate defining at least one channel therein for receiving at least one blade. The blade has a desired shape to provide a cutting edge with a predetermined contour to substantially match the contour of the at least one channel. The blade is welded to the base plate to secure it relative thereto and extends above the base plate to provide an exposed edge for cutting paper and the like into the predetermined contour. A covering is provided over at least a portion of the back surface of the base plate.