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Process for synthesizing zeolite ssz-13

A technology of SSZ-13 and zeolite, applied in chemical instruments and methods, molecular sieves and alkali exchange compounds, inorganic chemistry, etc., can solve the problem of expensive colloidal aluminosilicate compositions

Pending Publication Date: 2020-11-03
萨德化学制品印度私人有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, colloidal aluminosilicate compositions are expensive

Method used

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  • Process for synthesizing zeolite ssz-13

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] 1) Example 1: Synthesize H-SSZ-13 with input SAR as 26

[0071] Get 40g of NNN trimethyladamantyl ammonium hydroxide (TMADAOH) templating agent solution (25wt% in water), mix it with 13.6g of 3-chloro-2-hydroxypropyl trimethylammonium hydroxide salt (HPTMAOH solution, 25 wt% in water) was mixed with 137 g of water. A solution of 8 g KOH in 91 g water was then added and mixed for 10 minutes. 156.8 g of silica sol (30 wt% SiO2) was slowly added to the above mixture, and further stirred for 30 minutes. Aluminum sulfate solution was prepared separately by adding 19.2 g of aluminum sulfate.16H2O (16 wt.% Al2O3) in 54.74 g of water to obtain a clear solution. Aluminum sulfate solution is slowly added to the solution containing templating agent, base and silica precursor. The gel mixture was stirred for 1 hour.

[0072] The molar gel composition (composition) at this stage is as follows

[0073] 26 SiO2: Al2O3: 2 K2O: 1.57 TMADAOH: 0.65 HPTMAOH: 802 H2O

[0074]The pH of...

Embodiment 2

[0076] 2) Example 2: Synthesize H-SSZ-13 with input SAR as 26

[0077] Get the NNN trimethyladamantyl ammonium hydroxide (TMADAOH) templating agent solution (25wt% in water) of 26.7g, with the hydroxide of 26.7g 3-chloro 2-hydroxypropyltrimethylammonium chloride salt (HPTMAOH solution, 25 wt% in water) was mixed with 137 g of water. A solution of 8 g KOH in 91 g water was then added and mixed for 10 minutes. 156.8 g of silica sol (30 wt% SiO2) was slowly added to the above mixture, and further stirred for 30 minutes. Aluminum sulfate solution was prepared separately by adding 19.2 g of aluminum sulfate.16H2O (16 wt.% Al2O3) in 54.74 g of water to obtain a clear solution. Aluminum sulfate solution is slowly added to the solution containing templating agent, base and silica precursor. The gel mixture was stirred for 1 hour.

[0078] The molar gel composition (composition) at this stage is as follows

[0079] 26 SiO2: Al2O3: 2 K2O: 1.0 TMADAOH: 1.3 HPTMAOH: 802 H2O

[0080]...

Embodiment 3

[0082] 3) Example 3: Synthesis of H-SSZ-13 with input SAR as 17

[0083] Take 52.4 g of NNN trimethyladamantyl ammonium hydroxide (TMADAOH) templating agent solution (25 wt% in water) along with 134 g of water. A solution of 7.9 g KOH in 90 g water was then added and mixed for 10 minutes. 154 g of silica sol (30 wt% SiO2) was slowly added to the above mixture, and further stirred for 30 minutes. Aluminum sulfate solution was prepared separately by adding 28.8 g of aluminum sulfate.16H2O (16 wt.% Al2O3) in 54 g of water to obtain a clear solution. Aluminum sulfate solution is slowly added to the solution containing templating agent, base and silica precursor. The gel mixture was stirred for 1 hour.

[0084] The molar gel composition (composition) at this stage is as follows

[0085] 17 SiO2: Al2O3: 1.3 K2O: 1.37 TMADAOH: 524 H2O

[0086] The pH of the gel composition was set to pH 12 by adding a 20 wt% concentration KOH solution. 1.6 g of SSZ-13 seed crystals were added t...

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Abstract

A primary means by way of which SSZ-13 which is an aluminosilicate zeolite with a chabazite structure is synthesized. The synthesis employs quaternary ammonium salts i.e chloride or hydroxide salts of3-chloro-2-hydroxy propyl trimethyl ammonium ion [(CH3)3N+CH2-CHOH-CH2Cl] solution or 2,3-dihydroxy propyl trimethyl ammonium ion [(CH3)3N+CH2-CHOH-CH2OH] solution referred herein as Q1, silica, alumina and an alkali metal cation in addition to low amounts of NNN-Trimethyl adamantyl ammonium hydroxide referred herein as Q2 to synthesize the SSZ-13. An auxiliary means by way of which the SSZ-13 synthesized can further ion exchanged to Ammonium form and subsequently calcined to H-form.

Description

[0001] Foreword: [0002] Natural and synthetic zeolites are important and useful compositions. Many of these zeolites or aluminosilicates are porous and have well-defined, unique crystal structures and chemical compositions. Within the crystals are numerous cavities and pores that vary in size and shape from zeolite to zeolite. Variations in chemical composition, pore size and shape cause changes in the adsorption and catalytic properties of these zeolites. Due to their unique molecular sieve characteristics as well as their underlying acidic properties, shape selectivity, ion exchange capacity, zeolites are especially useful as adsorbents in hydrocarbon processing and as catalysts for cracking, reforming and other hydrocarbon conversion reactions and environmental applications. Although many different crystalline aluminosilicates have been prepared and tested for extensive applications, the search continues for new zeolites that can be used in hydrocarbon and chemical proces...

Claims

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Application Information

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IPC IPC(8): C01B39/48
CPCC01B39/48
Inventor 达南杰·普拉巴卡尔·萨布德阿尔希亚·阿尔塔夫·拉勒吉拉杰什库马尔·马努拜·帕特尔维贾伊·索潘·纳赫德
Owner 萨德化学制品印度私人有限公司
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