STA-20, a molecular sieve having a new framework type, is described. STA-20AP (as prepared) can have an alkyl amine, such as trimethylamine, and 1,6-(1,4-diazabicyclo[2.2.2]octane) hexyl cations (from diDABCO-C6) as SDAs. A lower alkyl ammonium hydroxide, such as tetrabutylammonium hydroxide, can be used as a pH modifier for making SAPO STA-20. A calcined product, STA-20C, formed from as made STA-20 is also described. Methods of preparing STA-20, activating STA-20 by calcination, and metal containing calcined counterparts of STA-20 are described along with methods of using STA-20 and metal containing calcined counterparts of STA-20 in a variety of processes, such as treating exhaust gases and converting methanol to olefins are described.

Provided is a method for preparing a zeolite having a Si/Al ratio of at least 10 by interzeolite transformation in the absence of an organic structure directing agent. The method is more cost effective and less equipment intensive as it eliminates the costly organic structure directing agent and the waste treatment at the plant.

A zeolite having the framework structure of SSZ-31 is synthesized using 1-cyclohexylmethyl-1-ethylpiperidinium cations as a structure directing agent.

A zeolite having the framework structure of SSZ-31 is synthesized using 1-cyclohexylmethyl-1-ethylpiperidinium cations as a structure directing agent.

STA-18, a molecular sieve having a SFW structure and containing phosphorus in the framework, is described. STA-18AP (as prepared) can have a lower alkyl amine, such as trimethylamine, and one of 1,6-(1,4-diazabicyclo[2.2.2]octane)hexyl cations (from diDABCO-C6) or 1,7-(1,4-diazabicyclo[2.2.2]octane)heptyl cations (from diDABCO-C7) or 1,8-(1,4-diazabicyclo[2.2.2]octane)octyl cations (from diDABCO-C8) as SDAs. A lower alkyl ammonium hydroxide, such as tetrabutylammonium hydroxide, can be used as a pH modifier for making SAPO STA-18. A calcined product, STA-18C, formed from STA-18AP is also described. Methods of preparing STA-18AP, STA-18C and metal containing calcined counterparts of STA-18C are described along with methods of using STA-18C and metal containing calcined counterparts of STA-18C in a variety of processes, such as treating exhaust gases and converting methanol to olefins are described.

The present invention relates to a method of synthesis of zeolitic LTA adsorbents containing intercrystalline mesoporosity and controlled particle size, which can, for example, be used in natural gas dehydration processes, seeking to comply not only with the specifications on moisture content in the natural gas, but also improving the efficiency of the gas drying process in regard to the adsorption kinetics, not compromising the adsorption capacity, water selectivity, and the regeneration cycles of the adsorbent. Another possible application of these compounds is as the support for catalysts for oil refining processes. The method of obtaining the zeolitic adsorbent solids, the purpose of this invention, consists of including an aging step of the reaction mixture in conjunction with the addition of N,N-dimethyl-N-[3-(trimethoxysilane)propyl]octadecyl ammonium chloride (TPOAC) to the reaction mixture.

The present invention relates to a method of synthesis of zeolitic LTA adsorbents containing intercrystalline mesoporosity and controlled particle size, which can, for example, be used in natural gas dehydration processes, seeking to comply not only with the specifications on moisture content in the natural gas, but also improving the efficiency of the gas drying process in regard to the adsorption kinetics, not compromising the adsorption capacity, water selectivity, and the regeneration cycles of the adsorbent. Another possible application of these compounds is as the support for catalysts for oil refining processes. The method of obtaining the zeolitic adsorbent solids, the purpose of this invention, consists of including an aging step of the reaction mixture in conjunction with the addition of N,N-dimethyl-N-[3-(trimethoxysilane)propyl]octadecyl ammonium chloride (TPOAC) to the reaction mixture.

A method is disclosed for synthesizing zeolite SSZ-52 in the presence of an organic structure directing agent having the following structure (1): ##STR00001##
wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently selected from the group consisting of alkyl groups having from 1 to 3 carbon atoms and n has a value of 0, 1 or 2.

A method is disclosed for synthesizing zeolite SSZ-52 in the presence of an organic structure directing agent having the following structure (1): ##STR00001##
wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently selected from the group consisting of alkyl groups having from 1 to 3 carbon atoms and n has a value of 0, 1 or 2.

A molecular sieve having the structure of SSZ-99 is synthesized using 1,1-diethylpyrrolidinium cations as a structure directing agent.