STA-20, novel molecular sieve framework type, methods of preparation and use

A technology of STA-20 and SAPOSTA-20, applied in STA-20

Inactive Publication Date: 2018-12-21
JOHNSON MATTHEY PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, although small changes in the structure cannot be discerned using common analytical calculations, the catalytic activity of the structure-modified zeolites is improved compared to very closely related analogous zeolites

Method used

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  • STA-20, novel molecular sieve framework type, methods of preparation and use
  • STA-20, novel molecular sieve framework type, methods of preparation and use
  • STA-20, novel molecular sieve framework type, methods of preparation and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0219] Embodiment 1 synthetic SAPO STA-20 type

[0220] A reaction gel was prepared with 2% SAPO-AFX (seeded) in a 125 mL pressure vessel with a molar composition:

[0221] 0.10 SiO 2 :1 Al(OH) 3 :0.90H 3 PO 4 :40H 2 O: 0.10 DiDABCO-C6: 0.42 Trimethylamine: 0.08 Tetrabutylammonium hydroxide.

[0222] The reagents used and the order of addition are:

[0223] a) Add the required amount of phosphoric acid (H 3 PO 4 85% by weight, Alfa Chemicals) into a 100ml container by weight.

[0224] b) Add required amount of fumed silica (Cabosil) and water to the phosphoric acid and stir.

[0225] c) Add the required amount of aluminum hydroxide (Al(OH) 3 , Alfa Aesar) was added to the above mixture.

[0226] d) After stirring for 10 minutes, 1,1'-(1,6-hexanediyl)bis(4-aza-1-azoniumbicyclo[2.2.2]octane)dibromide (Alfa Chemicals) was added .

[0227] e) Trimethylamine (Alfa Chemicals, 85% by weight) was added to the above solution, and the mixture was stirred for 10 minutes.

...

Embodiment 2

[0235] Embodiment 2 activates SAPO STA-20 (remove template agent)

[0236] The fabricated (templated) material of Example 1 was activated by calcination in air. The material was heated at 2°C / minute to 110°C and held at 110°C for 10 hours, then heated at 5°C / minute to 450°C and held at 450°C for 16 hours. The material was then heated to 550°C at 5°C / min and held at 550°C for 16 hours.

[0237] The powder XRD pattern is shown in image 3 , including the diffraction peaks of Table 5. Powder XRD analysis showed that the product was phase pure STA-20.

[0238] table 5

[0239]

[0240]

[0241] (a) = ±0.2

Embodiment 3

[0242] Embodiment 3 synthetic SAPO STA-20 type

[0243] A reaction gel was prepared following the same procedure described in Example 1 with 2% SAPO-AFX (seed) in a 125 mL pressure vessel, which had a molar composition:

[0244] 0.20 SiO 2 :1 Al(OH) 3 :0.80H 3 PO 4 :40H 2 O: 0.10 DiDABCO-C6: 0.42 Trimethylamine: 0.08 Tetrabutylammonium hydroxide.

[0245] The XRD of the dried product was shown at Figure 4 middle.

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Abstract

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.

Description

technical field [0001] The present invention relates to STA-20, a molecular sieve material with a new skeleton structure. SAPO-STA-20 was manufactured using trimethylamine and 1,6-(1,4-diazabicyclo[2.2.2]octane)hexyl dibromide (diDABCO-C6) as a structure-directing agent (SDA) to produce. Calcined products were formed from SAPO-STA-20 containing SDA. The present invention also relates to methods of preparing STA-20, and methods of using the calcined product formed from STA-20 as a catalyst. Background technique [0002] Molecular sieves are a commercially important class of materials having a crystal structure defined by a unique pore structure as revealed by a unique X-ray diffraction (XRD) pattern. The crystal structure defines cavities and channels / pores that are characteristic of a particular type of molecular sieve: this is often described as framework type or topology type. A complete list of framework types is maintained by the IZA (International Zeolite Associatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B37/06B01J29/85C01B37/08C01B39/54
CPCC01B37/06C01B37/08B01J29/85C01B39/48C01B39/54B01J35/30B01D53/94B01D53/9418B01D53/9436B01J29/83C01B37/04C07C1/20F01N3/0842F01N3/2066C07C2529/85C07C2529/83B01J2229/186B01J35/56B01J35/19B01D2255/2092B01D2255/30B01D2255/50B01J29/70B01J29/84B01J37/0018B01J37/04C01P2002/72
Inventor J·卡希R·加西亚 萨拉斯A·特里纳P·赖特
Owner JOHNSON MATTHEY PLC
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