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Catalyst for producing propylene and ethylene by direct conversion of tert-butyl alcohol and application of catalyst

A catalyst, tert-butanol technology, used in physical/chemical process catalysts, molecular sieve catalysts, bulk chemical production, etc., can solve the problems of complex downstream product processes, few types of downstream products, low effective utilization, etc., to achieve a good choice Sexuality, overcoming the effect of less variety, and improving selectivity

Active Publication Date: 2021-12-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of overcapacity of tert-butanol in the prior art, few types of downstream products, low effective utilization rate, complicated process for preparing downstream products through tert-butanol, the present invention provides a method for direct conversion of tert-butanol to produce propylene and Ethylene Catalyst and Its Application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Put SIO 2 / Al 2 O 3 Na [beta] molecular sieve was exchanged by 5 wt% ammonium nitrate, and then dried in an oven at 80 ° C for 5 hours in a muffle furnace for 5 hours to obtain an Hβ molecular sieve, spare.

[0030] 20 grams of thin aluminate were dissolved in 100 g of 5 wt% dilute nitric acid and mixed solution of ethanol, wherein the volume ratio of dilute nitric acid with ethanol was 2: 1, and the mixture temperature was 60 ° C, stirred vigorously, and formed aluminum hydroxide. The slurry was mixed with 0.24 gram fluoride and the above hydroxide pulp mixed with the above hydroxide slurry, 80 grams of β-molecular sieve obtained by extaged the slurry, dried in an oven at 80 ° C for 20 hours, and then 600 Roast in the muffle furnace for 4 hours to obtain nuclear shell β / f-al 2 O 3 The composite material, the core shell material is pressed, grind, and screen, to obtain the catalyst of tert-butanol directly to produce propylene and ethylene.

[0031] With a fixed bed reac...

Embodiment 2

[0033] Put SIO 2 / Al 2 O 3 The molar ratio of Na [beta] molecular sieve was exchanged by 5 wt% ammonium nitrate, and was dried in an oven at a 100 ° C for 8 hours, and then 500 ° C in the muffle 5 hours to obtain an Hβ molecular sieve, spare.

[0034] 25 grams of thin aluminate were dissolved in 100 grams of 10 wt% dilute nitric acid and mixed solution of ethanol, wherein the volume ratio of dilute nitric acid with ethanol was 5: 1, and the mixture temperature was 80 ° C, stirred vigorously, and formed aluminum hydroxide. The slurry was mixed with the hydrogen oxide slurry with the above hydroxide slurry, and 75 grams of Hβ molecular sieve prepared by the above-mentioned slurry, and dried in an oven at 120 ° C for 5 hours with the above-mentioned slurry. 500 ° C muffle furnace is calcined for 6 hours to get nucleation shell type β / f-al 2 O 3 The composite material, the core shell material is pressed, grind, and screen, to obtain the catalyst of tert-butanol directly to produce ...

Embodiment 3

[0037] The SiO 2 / Al 2 O 3 Molar ratio of molecular sieve Naβ 80 5wt% ammonium nitrate exchange was placed in a drying oven at 80 ℃ for 20 hours in a muffle furnace and then calcined at 500 ℃ for 5 hours to obtain a zeolite Hβ standby.

[0038] 67 grams of an quasi boehmite was dissolved in 100 g of ethanol and 5wt% dilute nitric acid in a mixed solvent, wherein the volume ratio of dilute nitric acid to ethanol was 4: 1, to control the mixing temperature 80 ℃, with vigorous stirring to form a slurry of aluminum hydroxide the 1.95 g of ammonium fluoride slurry uniformly mixed with the aluminum hydroxide to obtain F-containing alumina slurry, resulting beta] with the slurry are sprayed with 33 g of molecular sieve, dried in an oven at 100 deg.] C for 10 hours, then at 450 ℃ calcined in a muffle furnace for 12 hours to give core-shell type β / F-Al 2 O 3 Composite material, the material of the core-shell type tableting, milling, sieving, tert-butyl alcohol to give catalyst productiv...

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PUM

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Abstract

The invention discloses a catalyst for producing propylene and ethylene by direct conversion of tert-butyl alcohol, the catalyst has a core-shell structure, the core is a beta molecular sieve, and the shell is alumina. The invention also discloses a method for producing propylene and ethylene by direct conversion of tert-butyl alcohol, the method comprises the following steps: taking a tert-butyl alcohol aqueous solution as a raw material, contacting the raw material with the catalyst to react to generate a product containing propylene and ethylene. By adopting the catalyst disclosed by the invention, a process for directly converting tert-butyl alcohol into propylene and ethylene is realized, and the catalyst has the characteristics of high catalyst activity, high stability, high selectivity of products propylene and ethylene and the like.

Description

Technical field [0001] The present invention relates to a catalyst for direct convection of tert-butanol to produce propylene and ethylene, and a method of directly converting the production of propylene and ethylene. Background technique [0002] Tba, TERT-Butyl Alcohol is a colorless crystalline, there is a small amount of water to be colorless volatile liquid, there is an odor like camphor, hygroscopic, flammable, and other alcohols Toxicity and anesthesia. Tert-butanol is soluble in most organic solvents, such as alcohols, esters, ketones, aromatic and fatty hydrocarbons, these properties make tut butyols into useful solvents and additives, one of the extensive use of petrochemical products. . The most applicable to gasoline additives, increase the octane number of gasoline, and tert-butanol may be added separately, or mix other alcohol solvents, or methyl tert-butyl ether is added. T-butanol can also be used in the synthesis of organic chemicals, such as the production of hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/70C07C1/20C07C11/04C07C11/06
CPCB01J29/7007C07C1/20B01J2229/20C07C11/04C07C11/06Y02P20/52Y02P30/40Y02P30/20
Inventor 任丽萍李斌滕加伟
Owner CHINA PETROLEUM & CHEM CORP
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