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Preparation method of hydroisomerization/cracking catalyst

A cracking catalyst, hydroisomerization technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of low yield of target products, affecting economic benefits, and sharp increase in light products. , to achieve excellent isomerization performance, improved material mass transfer, increased diesel content and lube base oil content

Active Publication Date: 2019-03-05
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, excessive cracking will also cause a sharp increase in light products, and the yield of target products (diesel or lubricating oil) will decrease, which not only reduces the performance of the product, but also reduces the yield, affecting economic benefits

Method used

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  • Preparation method of hydroisomerization/cracking catalyst
  • Preparation method of hydroisomerization/cracking catalyst
  • Preparation method of hydroisomerization/cracking catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Synthesis of sodium ZSM-22 / ZSM-23 composite molecular sieves: NaOH, Al 2 (SO 4 ) 3 18H 2 O, dimethylamine, triethylamine, silica sol (SiO 2 The content is 30wt.%), concentrated sulfuric acid (98%) and water are mixed uniformly according to a certain ratio to form a sol system during the synthesis of ZSM-23 molecular sieve, and ZSM-22 molecular sieve is added to the above sol system as a seed crystal to form a mixed Sol system, the specific material composition is as follows: SiO 2 / Al 2 o 3 =70, dimethylamine / SiO 2 =1, triethylamine / SiO 2 = 1, H 2 SO 4 / SiO 2 =0.15,Na 2 O / SiO 2 =0.3, ZSM-23 molecular sieve seed crystal / SiO 2 =0.1,H 2 O / SiO 2 =35; after stirring and mixing evenly, put it into a 1L high-pressure reactor, heat up to 170°C after sealing, and crystallize for 72 hours. Structure-based sodium-type ZSM-22 / ZSM-23 composite molecular sieve containing template. The XRD spectrum of the ZSM-22 / ZSM-23 composite molecular sieve is shown in figure 2 ...

Embodiment 2

[0062] Synthesis of sodium ZSM-22 / ZSM-23 composite molecular sieves: NaOH, Al 2 (SO 4 ) 3 18H 2 O, dimethylamine, triethylamine, silica sol (SiO 2 The content is 30wt.%), concentrated sulfuric acid (98%) and water are mixed uniformly according to a certain ratio to form a sol system during the synthesis of ZSM-23 molecular sieve, and ZSM-22 molecular sieve is added to the above sol system as a seed crystal to form a mixed Sol system, the specific material composition is as follows: SiO 2 / Al 2 o 3 =100, dimethylamine / SiO 2 =0.6, triethylamine / SiO 2 =0.8,H 2 SO 4 / SiO 2 =0.15,Na 2 O / SiO 2 =0.3, ZSM-23 molecular sieve seed crystal / SiO 2 = 2, H 2 O / SiO 2 =35; after stirring and mixing evenly, put it into a 1L high-pressure reactor, heat up to 170°C after sealing, and crystallize for 65 hours. Structure-based sodium-type ZSM-22 / ZSM-23 composite molecular sieve containing template.

[0063] Catalyst preparation: Take 100g of sodium-type ZSM-22 / ZSM-23 composite mole...

Embodiment 3

[0065] Synthesis of sodium ZSM-22 / ZSM-23 composite molecular sieves: NaOH, Al 2 (SO 4 ) 3 18H 2 O, dimethylamine, triethylamine, silica sol (SiO 2 The content is 30wt.%), concentrated sulfuric acid (98%) and water are mixed uniformly according to a certain ratio to form a sol system during the synthesis of ZSM-23 molecular sieve, and ZSM-22 molecular sieve is added to the above sol system as a seed crystal to form a mixed Sol system, the specific material composition is as follows: SiO 2 / Al 2 o 3 =80, dimethylamine / SiO 2 =0.5, triethylamine / SiO 2 =0.5,H 2 SO 4 / SiO 2 =0.10,Na 2 O / SiO 2 =0.4, ZSM-23 molecular sieve seed crystal / SiO 2 =0.2,H 2 O / SiO 2 =35; after stirring and mixing evenly, put it into a 1L high-pressure reactor, heat up to 165°C after sealing, and crystallize for 69 hours. Structure-based sodium-type ZSM-22 / ZSM-23 composite molecular sieve containing template.

[0066] Catalyst preparation: Take 100g of sodium-type ZSM-22 / ZSM-23 composite molec...

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Abstract

The invention relates to a preparation method of a hydroisomerization / cracking catalyst. The method includes the following concrete steps: treating a potassium type or sodium type ZSM-22 / ZSM-23 composite molecular sieve containing a template with an alkali solution of a certain concentration; washing an obtained product with deionized water and drying and roasting to remove the template; exchanging by using an ammonium nitrate solution, filtering, washing with deionized water, and drying and roasting to prepared a hydrogen type ZSM-22 / ZSM-23 composite molecular sieve; mixing kneading, formingand roasting the hydrogen type ZSM-22 / ZSM-23 composite molecular sieve, amorphous oxides and an acid solution to prepare a carrier; and immersing the carrier into an aqueous solution of soluble saltscontaining active components, and then drying and roasting to prepare the catalyst. Compared with a catalyst used by the prior art, the catalyst provided by the invention has better catalytic activityand target product selectivity in a hydroisomerization conversion process of Fischer-Tropsch synthetic wax.

Description

technical field [0001] The invention belongs to the field of molecular sieve catalysts, and in particular relates to a catalyst preparation method for Fischer-Tropsch synthesis wax hydroisomerization / cracking based on ZSM-22 / ZSM-23 composite molecular sieves. Background technique [0002] Fischer-Tropsch synthesis (Fischer-Tropsch synthesis) is referred to as FT reaction, which uses syngas (CO and H2) as raw materials to synthesize liquid fuels mainly based on paraffin under catalysts (such as iron-based, cobalt-based, etc.) and appropriate reaction conditions. process. Traditional Fischer-Tropsch synthesis products are characterized by wide distillation range distribution, high content of heavy hydrocarbons, and all of them are straight chain hydrocarbons. Such heavy alkanes have a high freezing point and are not suitable for direct use as diesel oil or lubricating oil. Therefore, the freezing point must be depressed. The most important means of depreciating normal paraff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80B01J35/10C10G45/62C10G45/64
CPCC10G45/62C10G45/64B01J29/80B01J2229/38B01J2229/18C10G2300/1022C10G2400/04C10G2400/10B01J35/633
Inventor 王从新田志坚迟克彬阎立军曲炜胡胜马怀军李梦晨李鹏于宏悦罗琛
Owner PETROCHINA CO LTD
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