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A kind of nano ZSM-22 zeolite-loaded phosphorus-nickel hydroisomerization catalyst and its preparation method and application

A ZSM-22, hydroisomerization technology, applied in the field of hydroisomerization performance research, can solve the problems of large Ni loading and difficulty in further improving catalyst hydroisomerization activity, and achieve high isomer yield. rate effect

Active Publication Date: 2021-08-24
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Among the supported Ni catalysts for the hydroisomerization of long-chain n-dodecane in the prior art, the loading capacity of Ni is large, and it is difficult to further improve the hydroisomerization activity of the catalyst

Method used

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  • A kind of nano ZSM-22 zeolite-loaded phosphorus-nickel hydroisomerization catalyst and its preparation method and application
  • A kind of nano ZSM-22 zeolite-loaded phosphorus-nickel hydroisomerization catalyst and its preparation method and application
  • A kind of nano ZSM-22 zeolite-loaded phosphorus-nickel hydroisomerization catalyst and its preparation method and application

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Experimental program
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Effect test

preparation example Construction

[0035] The preparation method of ZSM-22-De carrier is:

[0036] (1) 0.3gAl 2 (SO 4 ) 3 18H 2 Dissolve O in 30mL deionized water, add 0.9g KOH after fully dissolved, and then slowly add 2g of 1,6-hexanediamine and stir for 1 hour to obtain a clear solution, then add 10g of silica sol solution, and form a silica-alumina gel after stirring for 1 hour (1.0Al 2 o 3 / 15K 2 O / 100SiO 2 / 37HD / 3800H 2 (2), put in a kettle and crystallize at 50° C. for 6 hours, take the kettle to obtain the initial gel, add 2 g of high molecular weight polymer (about 20,000 actual molecular weight, but not limited to this) to the initial gel under stirring conditions, Continue to stir for 4 hours, put in a kettle, and conduct static crystallization at 160° C. for 48 hours. After washing, filtering, and calcining at 500° C. for 15 hours, a zeolite sample was obtained, and a nanometer ZSM-22 zeolite containing a mesoporous structure was obtained.

[0037] (2) Carry out acid treatment to the nanom...

Embodiment 1

[0039] ZSM-22-De carrier 2.0g, 0.0519g Ni(NO 3 ) 2 ·6H 2 O and 0.0146 g of NH 4 h 2 PO 2 Dissolve it in 3.0mL of distilled water, add it dropwise to 2g of ZSM-22-De powder after the impregnation is completed, let it stand at room temperature for more than 12 hours, and dry it in an oven at 100°C for 12 hours. The catalyst precursor is compressed under a certain pressure, taking 40-60 mesh, and finally in H 2 In the atmosphere of 450 ° C for 3 hours, marked as NiP / ZSM-22-De#1 catalyst. Wherein, the loading amount of Ni is 0.5% by mass percentage, and the molar ratio of P / Ni atoms in the raw material is 1. (In the NiP / ZSM-22-De#1 catalyst, NiP only expresses that the active substance is phosphorus-nickel substance, which does not mean that the molar ratio of Ni and P in the final product is 1:1, 13 form volatile)

Embodiment 2

[0041] ZSM-22-De carrier 2.0g, 0.1038g Ni(NO 3 ) 2 ·6H 2 O and 0.0292 g of NH 4 h 2 PO 2 Dissolve it in 3.0mL of distilled water, add it dropwise to 2g of ZSM-22-De powder after the impregnation is completed, let it stand at room temperature for 12 hours, and dry it in an oven at 100°C for 12 hours to prepare the catalyst The precursor is compressed under a certain pressure, taking 40-60 mesh, and finally in H 2 In the atmosphere of 450 ° C for 3 hours, marked as NiP / ZSM-22-De#2 catalyst. Wherein, the loading amount of Ni is 1.0% by mass percentage, and the molar ratio of P / Ni atoms in the raw material is 1.

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Abstract

The invention discloses a nano ZSM-22 zeolite-supported phosphorus-nickel hydroisomerization catalyst, a preparation method and an application. First prepare the nano ZSM-22 zeolite containing mesoporous structure, then the nano-ZSM-22 zeolite carrier is acid-treated by dilute nitric acid or Mg, so that the treated ZSM-22-De has only a certain amount of weak acid centers and no strong acid centers, and then The ZSM-22-De carrier is impregnated with phosphorus and nickel-containing inorganic salts, and the loading amount of Ni metal in the catalyst is 0.5-3.0wt%, preferably 1.0wt%, to obtain a hydroisomerization catalyst. The catalyst has high activity and high isomerization selectivity, and when the prepared catalyst is used in the hydroisomerization reaction of long-chain n-dodecane, the catalyst presents a relatively high yield of monosubstituted isomers.

Description

technical field [0001] The invention belongs to the field of hydroisomerization of long-chain alkanes, and specifically relates to a method for preparing a phosphorus-nickel catalyst supported by nano ZSM-22 zeolite and its performance research on the hydroisomerization of long-chain n-dodecane . Background technique [0002] Hydroisomerization process plays a very important role in petroleum refining, petrochemical and other fields. For example, under the condition of ensuring the cetane number, it can improve the low-temperature fluidity of diesel oil; it can produce high-quality lubricating oil base oil, etc. Especially in some emerging fields, such as catalytic conversion of biosyngas obtained from lignocellulose gasification by Fischer-Tropsch conversion technology to obtain wax oil, vegetable oil after hydrofining, etc. However, in order to meet different conditions Under the use requirements, it is necessary to remove the long-chain n-alkane molecules in the raw mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/76C10G45/64
CPCB01J29/7684B01J2229/186C10G45/64
Inventor 张磊傅雯倩唐天地贺黎文柏丹妮才国仁
Owner CHANGZHOU UNIV
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