Chinese Academy of Sciences

Dong Fan

Zhongmin Liu

Peng Fei Tian

Ying Zhang

Xiong Su

Yue Yang

Dehua Wang

A SAPO-34 molecular sieve and method for preparing the same, whose chemical composition in the anhydrous state is expressed as: mSDA.(SiAlP)O, wherein m is 0.08-0.3, x is 0.01-0.60, y is 0.2-0.60, z is 0.2-0.60, and x+y+z=1. The template agent SDA is in micropores of the molecular sieve. SDA is an organic amine with the structural formula (CH)NRN(CH), wherein R is a saturated straight-chain or branched-chain alkylene group with having from 2-5 carbon atoms. There is a slight Si enrichment phenomenon on the crystal surface of the molecular sieve crystal, and the ratio of the surface Si content to the bulk Si content of the crystal ranges from 1.50-1.01. Said SAPO-34 molecular sieve, after being calcined at a temperature range from 400-700&#xb0; C. in air, can be used as a gas adsorbent and catalyst for an acid-catalyzed reaction or oxygenate to olefin reaction.

SAPO-34 molecular sieve and method for preparing the same

The present invention concerns a SAPO-34 molecular sieve and method for preparing the same, whose chemical composition in the anhydrous state is expressed as: mDIPA.(SiAlP)O, wherein, DIPA is diisopropylamine existing in cages and pore channels of said molecular sieve, wherein m is the molar number of diisopropylamine per one mole of (SixAlyPz)O, and m is from 0.03 to 0.25; x, y, z respectively represents the molar number of Si, Al, P, and x is from 0.01 to 0.30, and y is from 0.40 to 0.60, and z is from 0.25 to 0.49, and x+y+z=1. The SAPO-34 molecular sieve can be used as catalysts for acid-catalyzed reaction or oxygenate to olefins reaction.

The present invention provides a SAPO-34 molecular sieve, whose chemical composition in the anhydrous state is expressed as: mDGA.(SiAlP)O; wherein DGA is diglycolamine, distributing in the cages and pores of said molecular sieve; m is the molar number of the template agent diglycolamine per one mole of (SiAlP)O, and m is from 0.03 to 0.25; x, y, z respectively represents the molar number of Si, Al, P, and x is from 0.01 to 0.30, and y is from 0.40 to 0.60, and z is from 0.25 to 0.49, and x+y+z=1. Said SAPO-34 molecular sieve can be used as an acid-catalyzed reaction catalyst, such as a methanol to olefins reaction catalyst. The present invention also concerns the application of said SAPO-34 molecular sieve in adsorption separation of CHand CO.

SAPO-34 zeolite having diglycolamine as templating agent and synthesis method for the zeolite

The present invention relates to a metal silicoaluminophosphate molecular sieve MeAPSO with a RHO framework structure and a preparation method thereof. The metal silicoaluminophosphate molecular sieve is characterized in that: the metal atoms are at least one of vanadium, copper, molybdenum, zirconium, cobalt, manganese, magnesium, iron, nickel and zinc. The chemical composition of said metal silicoaluminophosphate molecular sieve in anhydrous state is expressed as: mR.nMe.(SixAlyPz)O, where R represents template existed in molecular sieve micropores, m is the molar number of said template per one molar of (SixAlyPz)O, m=0.1&#x2dc;0.5; Me represents metal atom entering into said metal silicoaluminophosphate molecular sieve framework, n is the molar number of Me per one molar of (SixAlyPz)O, n=0.001&#x2dc;0.30. Said metal silicoaluminophosphate molecular sieve has ion exchange performance and adsorption performance. The catalyst prepared from said metal silicoaluminophosphate molecular sieve can be applicable to multiple hydrocarbon reactions, such as catalytic cracking, reforming, polymerization, alkylation, transalkylation, isomerization, dehydrogenation, hydrogenation and the like.

Metal silicoaluminophosphate molecular sieve with RHO framework structure, and method for preparing the same

A solvothermal synthesis process of the SAPO molecular sieves and catalysts prepared thereby are provided. The synthesis process comprises the following steps: a) an organic amine, an aluminum source, a phosphorus source, a silicon source, and water are mixed in a molar ratio of 6-30:1:0.5-5:0.01-1.0:0.1-15, to obtain an initial mixture for preparing the SAPO molecular sieves, wherein the molar ratio of water to the organic amine is less than 2.0; b) the initial mixture obtained in the step a) is maintained at 30-60&#xb0; C. to and aged with stirring for not more than 24 hours, to obtain an initial gel; c) the initial gel obtain in the step b) is crystallized at 150-250&#xb0; C. for 0.5-15 days. The SAPO molecular sieves prepared thereby are used, after being calcined at 400-700&#xb0; C. in air, as catalysts for acid-catalyzed reactions or for conversion reactions of oxygen-containing compounds to olefins.

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Liaoning, China

Dong Fan