Ba hetero atom-containing LTL molecular sieve as well as preparation method and application thereof

A technology of molecular sieves and heteroatoms, applied in Ba heteroatom-containing LTL molecular sieves and its preparation and application fields, can solve the problems of limited industrial application and poor stability of single-function catalysts, and achieve good crystallinity, high single-pot yield, and good The effect of applying the foreground

Active Publication Date: 2017-02-15
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the stability of such single-functional cataly

Method used

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  • Ba hetero atom-containing LTL molecular sieve as well as preparation method and application thereof
  • Ba hetero atom-containing LTL molecular sieve as well as preparation method and application thereof
  • Ba hetero atom-containing LTL molecular sieve as well as preparation method and application thereof

Examples

Experimental program
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Example Embodiment

[0055] Example 1

[0056] Add 39.1g KOH and 45.2g aluminum hydroxide to 900g deionized water, stir evenly, transfer to a four-necked flask and react for 12h at 80°C. After cooling to room temperature, clear KAlO is obtained. 2 Solution, K in the aluminum source solution 2 O:Al 2 O 3 The molar ratio is 1.1:1. Slowly add 345.3g silica sol (SiO 2 The content is 30wt%), and the initial sol is obtained after vigorous stirring. Take 31.2g Ba(NO 3 ) 2 Dissolve 34g ethanol in 350g deionized water to make a barium source solution. The barium source solution was slowly dropped into the sol and continued to stir vigorously. After aging at 30°C for 16 hours, it was transferred to a dynamic kettle and reacted at 130°C for 20 hours. After the crystallization is completed, the reactant is cooled to room temperature, filtered, washed with deionized water to neutrality, and dried to obtain the LTL zeolite containing Ba.

[0057] Among them, the amount of aluminum hydroxide is Al 2 O 3 Calculated,...

Example Embodiment

[0059] Example 2

[0060] Add 31.1g KOH and 45.2g aluminum hydroxide to 850g deionized water, stir evenly, transfer to a four-necked flask, react at 60℃ for 14h, and cool to room temperature to obtain clear KAlO 2 Solution, K in the aluminum source solution 2 O:Al 2 O 3 The molar ratio is 0.8:1. Slowly add 345.3g silica sol (SiO 2 The content is 30wt%), and the initial sol is obtained after strong stirring. Take 35.2g Ba(NO 3 ) 2 Dissolve 68 g of ethanol in 450 g of deionized water to make a barium source solution. The barium source solution was slowly dropped into the sol and continued to stir vigorously. After aging at 20°C for 20 hours, it was transferred to an autoclave and reacted at 120°C for 48 hours. After the crystallization is completed, the reactant is cooled to room temperature, filtered, washed with deionized water to neutrality, and dried to obtain the LTL zeolite containing Ba.

[0061] Among them, the amount of aluminum hydroxide is Al 2 O 3 Calculated, the amount...

Example Embodiment

[0063] Example 3

[0064] Add 36.1g KOH and 45.2g aluminum hydroxide to 650g deionized water, stir evenly, transfer to a four-necked flask, react at 70℃ for 13h, and cool to room temperature to obtain clear KAlO 2 Solution, K in the aluminum source solution 2 O:Al 2 O 3 The molar ratio is 0.9:1. Slowly add 362.8g silica sol (SiO 2 The content is 30wt%), and the initial sol is obtained after vigorous stirring. Take 41.2g Ba(OH) 2 ·8H 2 0 and 68 g of ethanol were dissolved in 450 g of deionized water to prepare a barium source solution. The barium source solution was slowly dropped into the sol and continued to stir vigorously. After aging at 30°C for 24 hours, it was transferred to an autoclave and reacted at 140°C for 38 hours. After the crystallization is completed, the reactant is cooled to room temperature, filtered, washed with deionized water to neutrality, and dried to obtain the LTL zeolite containing Ba.

[0065] Among them, the amount of aluminum hydroxide is Al 2 O 3 Ca...

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Abstract

The invention discloses Ba hetero atom-containing LTL molecular sieve and a preparation method thereof. The preparation method of the molecular sieve comprises the following steps: a barium source, inorganic base, an aluminium source, a silicon source, water and alcohol are mixed according to a mol ratio in order to obtain sol, aging and crystallization are carried out in order, obtained solid is separated, washing and drying are carried out, and after roasting, the molecular sieve is obtained. The molecular sieve is advantageous in that: 1. the synthetic method is simple, single kettle yield is high, and synthesis and operation cost are low; 2. the product has good degree of crystallization, purity, and structured morphology; 3. the Ba hetero atom-containing LTL molecular sieve is used in an aromatization reaction of normal paraffins, and can obviously improve yield of aromatic hydrocarbons, especially yield of C8 aromatic hydrocarbons, and the molecular sieve has good application prospects.

Description

technical field [0001] The invention relates to a Ba heteroatom-containing LTL molecular sieve, a preparation method and application thereof. Background technique [0002] Zeolite L was first synthesized by Breck and Flanigen in 1958, and its crystal structure was determined by Barrer and Marshall. The L zeolite framework is composed of cannonite cages (CAN cages) and hexagonal column cages (D6R). The CAN cages and D6R cages are alternately connected around the sixfold axis of the C axis, and then rotated according to the sixfold axis to produce a twelve-membered ring. One-dimensional channel structure, the channel diameter is Typical structure is K 6 Na 3 Al 9 Si 27 o 72 21H 2 O, has good hydrothermal stability. [0003] In 1980, Bernard reported that platinum-loaded L molecular sieves had higher aromatic selectivity than traditional dual-functional reforming catalysts for linear alkanes, especially C6 and C7 normal alkanes. Since then, this single-functional refor...

Claims

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Application Information

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IPC IPC(8): C01B39/32B01J29/60C07C5/41C07C15/04C07C15/06C07C15/067
CPCB01J29/60B01J2229/183C01B39/32C01P2002/72C01P2004/03C07C5/41C07C15/04C07C15/06C07C15/067Y02P20/52
Inventor 杨勇赵春利杨永陈骁黄丽华陶智超李永旺
Owner SYNFUELS CHINA TECH CO LTD
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