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Method for preparing isobutane dehydrogenation catalyst by secondary calcination ball milling method, isobutane dehydrogenation catalyst obtained by method and application

A technology of dehydrogenation catalyst and secondary calcination, applied in catalyst activation/preparation, molecular sieve catalyst, chemical instruments and methods, etc., can solve the problem of low isobutane conversion rate and so on

Pending Publication Date: 2020-12-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defect that the conversion rate of isobutane is not high when the existing isobutane dehydrogenation catalyst is used to catalyze isobutane dehydrogenation to isobutene, and to provide a secondary calcination ball milling method to prepare isobutane dehydrogenation The method of the catalyst and the isobutane dehydrogenation catalyst prepared by the method and the application of the aforementioned isobutane dehydrogenation catalyst in the production of isobutene from isobutane dehydrogenation, the method provided by the invention can realize the preparation of isobutane dehydrogenation On the premise of the isobutene selectivity in the isobutene process and the carbon deposition resistance of the catalyst, the conversion rate of isobutane is further improved

Method used

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  • Method for preparing isobutane dehydrogenation catalyst by secondary calcination ball milling method, isobutane dehydrogenation catalyst obtained by method and application
  • Method for preparing isobutane dehydrogenation catalyst by secondary calcination ball milling method, isobutane dehydrogenation catalyst obtained by method and application
  • Method for preparing isobutane dehydrogenation catalyst by secondary calcination ball milling method, isobutane dehydrogenation catalyst obtained by method and application

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Embodiment 1

[0070] (1) Preparation of mesoporous molecular sieve material carrier

[0071] Add 0.0007mol template agent P123 to a solution containing 37% by weight of hydrochloric acid (16.4mL) and water (128mL), stir at 40°C until P123 is completely dissolved; then add 0.042mol ethyl orthosilicate to the above solution , stirred at 40°C for 24h, then transferred the resulting solution to a polytetrafluoroethylene-lined reactor, crystallized at 150°C for 20h, then filtered and washed 4 times with deionized water, and then pumped Filter and dry to obtain the raw powder of the mesoporous material; wash the raw powder of the mesoporous material with ethanol under reflux conditions for 24 hours to remove the template agent and obtain the mesoporous molecular sieve material A1.

[0072] Then put the mesoporous molecular sieve material A1 from which the template agent has been removed into a muffle furnace, and pass nitrogen gas into it, and raise the temperature to the terminal temperature at ...

Embodiment 2-4

[0086] Change the preparation process of the mesoporous molecular sieve material carrier in embodiment 1 and the consumption of each raw material in the preparation process of the isobutane dehydrogenation catalyst and change the heat activation treatment process parameter and the ball milling condition parameter, carry out embodiment 2-4, obtain respectively Mesoporous molecular sieve materials A2-A4, mesoporous molecular sieve material carriers C2-C4, and isobutane dehydrogenation catalysts Cat-2-Cat-4.

[0087] Table 1 lists the amount of each component used in the preparation process of the mesoporous molecular sieve material carrier and the pore structure parameters of the mesoporous molecular sieve materials A2-A4.

[0088] Table 2 lists the thermal activation process parameters (including the first heating start temperature, the first heating rate, the first heating end temperature, the second heating start temperature, the second heating rate and the second heating end...

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Abstract

The invention discloses a method for preparing an isobutane dehydrogenation catalyst through a secondary calcination ball milling method, the isobutane dehydrogenation catalyst and application. The method for preparing the isobutane dehydrogenation catalyst comprises the following steps: (a) preparing mesoporous material raw powder, (b) removing a template agent, (c) conducting thermal activationtreatment, (d) carrying out ball milling treatment, and (e) impregnating and loading the product obtained in the step (d) with a Pt component and a Zn component, then conducting solvent removal treatment, drying and roasting sequentially, wherein the thermal activation treatment process comprises two times of calcination, the calcination conditions are the same or different, and the calcination conditions are as follows: in the presence of nitrogen, the temperature is increased to a final temperature at the heating rate of 1-5 DEG C / min, and then heating is stopped, cooling is conducted to room temperature, and the final temperature is 500-900 DEG C. The obtained isobutane dehydrogenation catalyst has high isobutane conversion rate when catalyzing isobutane dehydrogenation to prepare isobutene.

Description

technical field [0001] The present invention relates to the field of isobutane dehydrogenation catalysts, in particular to a method for preparing an isobutane dehydrogenation catalyst by a secondary calcination ball milling method, an isobutane dehydrogenation catalyst prepared by the method, and the aforementioned isobutane dehydrogenation catalyst Application of catalyst in isobutane dehydrogenation to isobutene. Background technique [0002] Isobutane is a low-carbon alkane widely present in petroleum gas, natural gas and cracked gas. my country is rich in isobutane resources, which can be used to prepare isobutene. The industrial production process is generally to produce methyl tert-butyl ether or tert-butanol by reacting oil refining and chemical by-products, and then decompose and separate to prepare pure isobutene. Isobutene is an important organic chemical raw material. Industrially, high-concentration isobutene is mainly used to produce polyisobutene and copolymer...

Claims

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Application Information

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IPC IPC(8): B01J29/03B01J35/10B01J37/00B01J37/08C07C5/333C07C11/09
CPCB01J29/0325B01J37/0027B01J37/082C07C5/3337B01J35/393B01J35/394B01J35/61C07C11/09
Inventor 亢宇刘红梅薛琳
Owner CHINA PETROLEUM & CHEM CORP
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