摘要:
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 2 , where R represents template existed in molecular sieve micropores, m is the molar number of said template per one molar of (SixAlyPz)O 2 , m=0.1∼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 2 , n=0.001∼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.
摘要:
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 °C 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 °C for 0.5-15 days. The SAPO molecular sieves prepared thereby are used, after being calcined at 400 - 700 °C in air, as catalysts for acid-catalyzed reactions or for conversion reactions of oxygen-containing compounds to olefins.
摘要:
The present invention provides a SAPO-34 molecular sieve, whose chemical composition in the anhydrous state is expressed as: mDGA·(Si x Al y P z )O 2 ; 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 (Si x Al y P z )O 2 , 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 CH 4 and CO 2 .
摘要翻译:本发明提供SAPO-34分子筛,其无水状态的化学组成表示为:mDGA·(Si x Al y P z)O 2; 其中DGA是二甘醇胺,分布在所述分子筛的笼和孔中; m是每摩尔(Si x Al y P z)O 2的模板剂二甘醇胺的摩尔数,m为0.03至0.25; x,y,z分别表示Si,Al,P的摩尔数,x为0.01〜0.30,y为0.40〜0.60,z为0.25〜0.49,x + y + z = 1。 所述SAPO-34分子筛可用作酸催化的反应催化剂,如甲醇 - 烯烃反应催化剂。 本发明还涉及所述SAPO-34分子筛在CH 4和CO 2的吸附分离中的应用。
摘要:
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·(Si x Al y P z )O 2 , 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 2 , 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.
摘要:
A short-wavelength laser-excitation chiral Raman Spectrometer (A short-wavelength laser-excitation Raman Optical Activity Spectrometer) comprises a laser-excitation light source between 325nm and 532nm, the linear polarized homogeneous system, circularly polarized light converter, sample cell holder, circularly polarized light splitter, double beam bifurcated optical fiber, Rayleigh line filter, imaging spectrometer, CCD sensitive to short-wavelength range and data processing system. The laser coming from laser-excitation light source goes through the linear polarized homogeneous system then exposures to the sample cell, or the laser coming from laser-excitation light source goes through the linear polarized homogeneous system and circularly polarized light converter then exposures to the sample cell. The left/right circularly polarized Raman signals coming from sample cell go through the Rayleigh line filter, then enter into the incidence end of Y-type double-beam optical fiber, divided into two beams of polarized light via circularly polarized light splitter, present as a linear array on the other end of the optical fiber, then enter into the incident slit of imaging spectrograph. The Raman signals are separated by the imaging spectrograph then enter the CCD on the exit of spectrograph which is sensitive in a wide range of short wavelength, and incident upon the top half and the bottom of it. CCD's acquisition system collects the light signals of the top half and the bottom half, that is, the right and the left ciculaly polarized Raman signals, converting them into electrical signals and transmitting the signals to the computer. After data processing, the sum of right and left circularly polarized Raman signals is counted as the total Raman signal, and the difference between right and left circularly polarized Raman signals as the circularly polarized Raman difference signal, that is, the Raman optical activity signal, and One acquisition when normalized difference of circular polarization intensity is computed as the circularly polarized Raman difference signal divided by the total Raman signal. The short-wavelength chiral Raman Spectrometer that can be applied to confirmation of chiral molecules' and biomolecules' absolute configurations, is a powerful tool for determination of absolute configuration and conformation of chiral molecules in wide region of chemistry, biology and medicine.
摘要:
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: mSDA·(Si x Al y P z )O 2 , wherein m is from 0.08 to 0.3, and x is from 0.01 to 0.60, and y is from 0.2 to 0.60, and z is from 0.2 to 0.60, and x + y + z =1. There is the template agent SDA in micropores of the molecular sieve. SDA is organic amine with the structural formula as (CH 3 ) 2 NRN(CH 3 ) 2 , wherein R is saturated straight-chain or branch-chain alkylene group with the number of carbon atoms at a range from 2 to 5. 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 to 1.01. Said SAPO-34 molecular sieve after calcined at a temperature range from 400 to 700 °C in air can be used as a gas adsorbent and catalysts for acid-catalyzed reaction or oxygenate to olefin reaction.
摘要翻译:本发明涉及一种SAPO-34分子筛及其制备方法,其无水状态的化学成分表示为:mSDA·(Si x Al y P z)O 2,其中m为0.08〜0.3,以及 x为0.01〜0.60,y为0.2〜0.60,z为0.2〜0.60,x + y + z = 1。 在分子筛的微孔中存在模板剂SDA。 SDA是结构式为(CH 3)2 NRN(CH 3)2的有机胺,其中R是碳原子数为2〜5的饱和直链或支链亚烷基。存在 在分子筛晶体的晶体表面上存在轻微的Si富集现象,并且表面Si含量与晶体的Si含量之比在1.50至1.01之间。 在空气中在400-700℃的温度范围煅烧后的所述SAPO-34分子筛可用作气体吸附剂和用于酸催化反应或含氧化合物与烯烃反应的催化剂。
摘要:
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 °C 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 °C for 0.5-15 days. The SAPO molecular sieves prepared thereby are used, after being calcined at 400 - 700 °C in air, as catalysts for acid-catalyzed reactions or for conversion reactions of oxygen-containing compounds to olefins.