摘要:
An object of the present invention is to provide a process of producing propylene by contacting ethylene with a catalyst, where propylene is produced with high selectivity. The present invention relates to a production process of propylene, comprising contacting ethylene with a catalyst, wherein the catalyst comprises a zeolite as an active ingredient and an acid content in the outer surface of the zeolite is 5 % or less based on an acid content of the entire zeolite.
摘要:
A method for manufacturing a catalyst, which comprises regenerating a catalyst comprising a CHA zeolite as an active ingredient and having an ethylene conversion lowered through reaction of producing propylene by bringing into contact with ethylene in a vapor phase, by bringing the catalyst into contact with a gas which does not comprise oxygen and comprises hydrogen having a hydrogen partial pressure of 0.01 MPa or more as an absolute pressure thereof.
摘要:
An object of the present invention is to provide a process of producing propylene by contacting ethylene with a catalyst, where propylene is produced with high selectivity. The present invention relates to a production process of propylene, comprising contacting ethylene with a catalyst, wherein the catalyst comprises a zeolite as an active ingredient and an acid content in the outer surface of the zeolite is 5% or less based on an acid content of the entire zeolite.
摘要:
A method for producing a cycloolefin which comprises partially hydrogenating an aromatic hydrocarbon with hydrogen in a liquid phase in the presence of water and a catalyst having as main component ruthenium supported on a carrier, to form the corresponding cycloolefin, wherein an oxide with the total pore volume of pores having radii of from 20 to 100,000 .ANG. being from 0.3 to 10 cc/g and with the volume of pores having radii of from 20 to 200 .ANG. constituting at most 15% of the total pore volume, is used as the carrier for the catalyst.
摘要:
The invention relates to an inorganic-organic hybrid material which comprises an inorganic component and an organic component, has a content of the inorganic component of 20-80% by mass, and has a refractive index of 1.60 or higher, wherein, when preparing a strip specimen having a thickness of 1,000 μm, a width of 5 mm and a length of 70 mm by using the inorganic-organic hybrid material and winding the specimen by 180° on a cylindrical metal rod having a diameter of 10 mm at 25° C., the specimen does not crack.
摘要:
Subjects for the invention are to provide a zeolite reduced in performance deterioration in repetitions of use or during long-term use and a process for producing the same and to provide an adsorbent comprising the zeolite and a heat utilization system or the like employing the adsorbent.The invention relates to a zeolite which has a framework density of from 10 T/nm3 to 16 T/nm3 and a carbon content of from 1% by weight to 6% by weight and satisfies the following (1) or (2): (1) the zeolite is an aluminophosphate which has a nitrogen content of from 0.5% by weight to 12% by weight and in which the aluminum may be partly replaced by Me; (2) the zeolite is a silicoaluminophosphate in which the aluminum may be partly replaced by Me and which, when burned to a carbon content lower than 0.3% by weight, retains the framework structure possessed by the silicoaluminophosphate before the burning: (provided that Me in (1) and (2) above is at least one element selected from the elements in Groups 2A, 7A, 8, 1B, and 2B of the periodic table).
摘要:
The object is to provide an exhaust gas reduction catalyst that exhibit high nitrogen oxide reduction performance, and to provide a simple and efficient method for producing the catalyst, in which the amount of the waste liquid is reduced, further, an object of the invention is to provide a zeolite-containing catalyst for reducing nitrogen oxides, which does not use an expensive noble metal or the like and which has high nitrogen oxide reduction performance. The present invention relates to a catalyst for reducing nitrogen oxides, which comprises: zeolite at least containing an aluminium atom and a phosphorus atom in the framework thereof; and a metal supported on the zeolite, wherein a coefficient of variation of intensity of the metal is at least 20%, when performing an elemental mapping of the metal in the catalyst with an electron probe microanalyzer, and, a catalyst for reducing nitrogen oxides, which comprises the zeolite containing at least a silicon atom, a phosphorus atom and an aluminium atom, and having an adsorption retention rate of at least 80% in a water vapor cyclic adsorption/desorption test at 90° C.
摘要:
An adsorption heat pump is provided in which water vapor can be efficiently adsorbed and desorbed using a heat source having a lower temperature than ones heretofore in use because the pump employs an adsorbent which has a large difference in water adsorption amount in adsorption/desorption and can be regenerated (release the adsorbate) at a low temperature.The invention provides an adsorption heat pump which comprises an adsorbate, an adsorption/desorption part having an adsorbent for adsorbate adsorption/desorption, a vaporization part for adsorbate vaporization which has been connected to the adsorption/desorption part, and a condensation part for adsorbate condensation which has been connected to the adsorption/desorption part, wherein the adsorbent, when examined at 25° C., gives a water vapor adsorption isotherm which, in the relative vapor pressure range of from 0.05 to 0.30, has a relative vapor pressure region in which a change in relative vapor pressure of 0.15 results in a change in water adsorption amount of 0.18 g/g or larger.
摘要:
The present invention provides an adsorbent for adsorption heat pump and humidity-control air conditioner, which is capable of adsorbing an adsorbate therein and desorbing the adsorbate therefrom in a narrow relative vapor pressure range, and can be regenerated (desorption) at a low temperature. Also, the present invention provides an adsorption heat pump and humidity-control air conditioner using the adsorbent which can be effectively operated even by a low-temperature heat source, as well as methods of operating the adsorption heat pump and humidity-control air conditioner by effectively utilizing low-temperature exhaust heat. The absorbent of the present invention comprises zeolite containing (i) aluminum, (ii) phosphorus and (iii) iron and/or gallium in a skeletal structure thereof, which is substantially free from change in structure upon subjecting the adsorbent to adsorption and desorption of water vapor.
摘要:
Subjects for the invention are to provide a zeolite reduced in performance deterioration in repetitions of use or during long-term use and a process for producing the same and to provide an adsorbent comprising the zeolite and a heat utilization system or the like employing the adsorbent. The invention relates to a zeolite which has a framework density of from 10 T/nm3 to 16 T/nm3 and a carbon content of from 1% by weight to 6% by weight and satisfies the following (1) or (2): (1) the zeolite is an aluminophosphate which has a nitrogen content of from 0.5% by weight to 12% by weight and in which the aluminum may be partly replaced by Me; (2) the zeolite is a silicoaluminophosphate in which the aluminum may be partly replaced by Me and which, when burned to a carbon content lower than 0.3% by weight, retains the framework structure possessed by the silicoaluminophosphate before the burning: (provided that Me in (1) and (2) above is at least one element selected from the elements in Groups 2A, 7A, 8, 1B, and 2B of the periodic table).