Patent classifications
C01B39/10
JMZ-1S, a CHA-containing molecular sieve and methods of preparation
JMZ-1S, a silicoaluminophosphate molecular sieve having a CHA structure and containing a trimethyl(cyclohexylmethyl)ammonium cation cation is described. A calcined product, JMZ-1SC, formed from JMZ-1S is also described. Methods of preparing JMZ-1S, JMZ-1SC and metal containing calcined counterparts of JMZ-1SC are described along with methods of using JMZ-1SC and metal containing calcined counterparts of JMZ-1SC in treating exhaust gases and in converting methanol to olefines.
JMZ-1S, a CHA-containing molecular sieve and methods of preparation
JMZ-1S, a silicoaluminophosphate molecular sieve having a CHA structure and containing a trimethyl(cyclohexylmethyl)ammonium cation cation is described. A calcined product, JMZ-1SC, formed from JMZ-1S is also described. Methods of preparing JMZ-1S, JMZ-1SC and metal containing calcined counterparts of JMZ-1SC are described along with methods of using JMZ-1SC and metal containing calcined counterparts of JMZ-1SC in treating exhaust gases and in converting methanol to olefines.
MOLECULAR SIEVE HAVING MESOPORES, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF
A molecular sieve has a silica/alumina molar ratio of 100-300, and has a mesopore structure. One closed hysteresis loop appears in the range of P/P.sub.0=0.4-0.99 in the low temperature nitrogen gas adsorption-desorption curve, and the starting location of the closed hysteresis loop is in the range of P/P.sub.0=0.4-0.7. The catalyst formed from the molecular sieve as a solid acid not only has a good capacity of isomerization to reduce the freezing point, but also can produce a high yield of the product with a lower pour point. The process for preparing the catalyst involves steps including crystallization, filtration, calcination, and hydrothermal treatment.
JMZ-1S, A CHA-CONTAINING MOLECULAR SIEVE AND METHODS OF PREPARATION
JMZ-1S, a silicoaluminophosphate molecular sieve having a CHA structure and containing a trimethyl(cyclohexylmethyl)ammonium cation cation is described. A calcined product, JMZ-1SC, formed from JMZ-1S is also described. Methods of preparing JMZ-1S, JMZ-1SC and metal containing calcined counterparts of JMZ-1SC are described along with methods of using JMZ-1SC and metal containing calcined counterparts of JMZ-1SC in treating exhaust gases and in converting methanol to olefines.
Synthesis of Nanocrystalline MFI Zeolite, Synthesis Method and use Thereof in Catalytic Applications
The present invention relates to a new process for synthesising a crystalline material comprising the zeolite MFI structure in nanocrystalline form, and which can comprise at least the following steps: i) preparing a mixture comprising at least one source of water, at least one source of a tetravalent element Y, at least one source of a trivalent element X, at least one source of an alkali cation or alkaline earth metal cation (A), and at least one organic molecule (OSDA1), wherein OSDA1 is preferably a monocyclic quaternary ammonium with the structure R.sub.1R.sub.2CycloN.sup.+, the molar composition of the mixture being: n X.sub.2O.sub.3:YO.sub.2:a A:m OSDA1:z H.sub.2O; ii) crystallising this mixture in a reactor; and iii) recovering the crystalline material obtained.
Crystalline metallophosphates, their method of preparation, and use
A new family of crystalline microporous metallophosphates designated AlPO-91 has been synthesized. These metallophosphates are represented by the empirical formula
C.sub.c.sup.+A.sub.a.sup.+M.sub.m.sup.2+EP.sub.xSi.sub.yO.sub.z
where M is a divalent framework metal such as magnesium or zinc, C is a cyclic organoammonium cation, A is an acyclic organoammonium cation, and E is a trivalent framework element such as aluminum or gallium. The AlPO-91 compositions are characterized by a new unique ABC-6 net structure, and have catalytic properties suitable for carrying out various hydrocarbon conversion processes, as well as characteristics suitable for the efficient adsorption of water vapor in a variety of applications, such as adsorption heat pumps.
Crystalline metallophosphates, their method of preparation, and use
A new family of crystalline microporous metallophosphates designated AlPO-91 has been synthesized. These metallophosphates are represented by the empirical formula
C.sub.c.sup.+A.sub.a.sup.+M.sub.m.sup.2+EP.sub.xSi.sub.yO.sub.z
where M is a divalent framework metal such as magnesium or zinc, C is a cyclic organoammonium cation, A is an acyclic organoammonium cation, and E is a trivalent framework element such as aluminum or gallium. The AlPO-91 compositions are characterized by a new unique ABC-6 net structure, and have catalytic properties suitable for carrying out various hydrocarbon conversion processes, as well as characteristics suitable for the efficient adsorption of water vapor in a variety of applications, such as adsorption heat pumps.
Zeolite production method
Provided is a method for continuous production of zeolite in which a starting material is continuously supplied to a tubular reactor to produce an aluminophosphate zeolite that contains, in the framework structure, at least aluminum atoms and phosphorus atoms or an aluminosilicate zeolite having 5SiO.sub.2/Al.sub.2O.sub.32000. The tubular reactor is heated using a heat medium; a ratio (volume)/(lateral surface area) of the volume (inner capacity) to the lateral surface area of the tubular reactor is 0.75 cm or smaller; and seed crystals are added to the starting material. Through using a small-diameter tubular reactor and heating with a heat medium, it becomes possible to heat sufficiently the entirety of a starting material (zeolite precursor gel) in a short time, and to allow reaction to proceed at a high rate. The occurrence of irregular pressure fluctuations during continuous production of the zeolite can be prevented by adding seed crystals.
Zeolite production method
Provided is a method for continuous production of zeolite in which a starting material is continuously supplied to a tubular reactor to produce an aluminophosphate zeolite that contains, in the framework structure, at least aluminum atoms and phosphorus atoms or an aluminosilicate zeolite having 5SiO.sub.2/Al.sub.2O.sub.32000. The tubular reactor is heated using a heat medium; a ratio (volume)/(lateral surface area) of the volume (inner capacity) to the lateral surface area of the tubular reactor is 0.75 cm or smaller; and seed crystals are added to the starting material. Through using a small-diameter tubular reactor and heating with a heat medium, it becomes possible to heat sufficiently the entirety of a starting material (zeolite precursor gel) in a short time, and to allow reaction to proceed at a high rate. The occurrence of irregular pressure fluctuations during continuous production of the zeolite can be prevented by adding seed crystals.
Crystalline metallophosphates, their method of preparation, and use
A new family of crystalline microporous metallophosphates designated AlPO-92 has been synthesized. These metallophosphates are represented by the empirical formula
C.sub.c.sup.+A.sub.a.sup.+M.sub.m.sup.2+EP.sub.xSi.sub.yO.sub.z
where M is a divalent framework metal such as magnesium, C is a cyclic organoammonium cation, A is an acyclic organoammonium cation, and E is a trivalent framework element such as aluminum or gallium. The AlPO-92 compositions are characterized by a new unique ABC-6 net structure, and have catalytic properties suitable for carrying out various hydrocarbon conversion processes, as well as characteristics suitable for the efficient adsorption of water vapor in a variety of applications, such as adsorption heat pumps.