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Catalyst for preparing iso-olefins by isomerizing straight-chain olefins and preparation method of catalyst

A straight-chain olefin and catalyst technology, applied in the field of catalyst and its preparation, can solve the problems of low catalyst reaction activity, low selectivity of target product, poor catalyst stability, etc., to maintain long-term stability, good technical effect, improve Effects of activity and stability

Inactive Publication Date: 2012-07-25
王伟跃
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The problem to be solved by the present invention is that in the prior art, the catalyst for the isomerization of straight-chain olefins into iso-olefins has low reactivity, the selectivity of the target product is not high, and the catalyst has poor stability. A new catalyst and its preparation are provided. method

Method used

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  • Catalyst for preparing iso-olefins by isomerizing straight-chain olefins and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Ratio of silicon to aluminum (SiO 2 / Al 2 o 3 ) (mole) is 901 grams of ferrierite raw powder of 20, 107 grams of aluminum sol, 15 grams of citric acid, 203 grams of deionized water are mixed uniformly, and then shaped after stirring at a constant speed for 30 minutes, and then dried at 100 ° C for 20 hours, Catalyst sample 1 was obtained after calcining at 500° C. for 2 hours.

Embodiment 2

[0031] Ratio of silicon to aluminum (SiO 2 / Al 2 o 3 ) (mole) is 885 grams of Ferrierite raw powder of 20, 93 grams of aluminum sol, 16 grams of citric acid, and 196 grams of deionized water are mixed evenly, and then shaped after stirring at a constant speed for 30 minutes, and then dried at 100 ° C for 20 hours. Then bake at 500°C for 2 hours. The catalyst obtained after roasting is immersed in palladium nitrate aqueous solution (the weight concentration of palladium is 5%) at 60 ℃ for 3 hours, wherein the ratio (weight) of catalyst and palladium nitrate aqueous solution is 2; the mixture of heating evaporation catalyst and palladium nitrate solution , and then dried at 100°C for 20 hours, and then calcined at 500°C for 2 hours to obtain catalyst sample 2.

Embodiment 3

[0033] Ratio of silicon to aluminum (SiO 2 / Al 2 o 3) (mol) is 916 grams of Ferrierite raw powder of 20, 111 grams of aluminum sol, 18 grams of citric acid, and 213 grams of deionized water are mixed uniformly, stirred at a constant speed for 30 minutes, then formed, and then dried at 100° C. for 20 hours. Then bake at 500°C for 2 hours. The catalyst obtained after roasting is immersed in cobalt nitrate aqueous solution (the weight concentration of cobalt is 5%) at 60 ℃ for 3 hours, wherein the ratio (weight) of catalyst to cobalt nitrate aqueous solution is 2; the mixture of heating evaporation catalyst and cobalt nitrate solution , and then dried at 100°C for 20 hours, and then calcined at 500°C for 2 hours to obtain catalyst sample 3.

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Abstract

The invention discloses a catalyst for preparing iso-olefins by isomerizing straight-chain olefins and a preparation method of the catalyst. The catalyst uses the FER (ferrierite) zeolite raw powder as a main active body, wherein the silica-alumina ratio (SiO2 / Al2O3) (molar ratio) is less than 50. The preparation method comprises the following steps: mixing FER zeolite raw powder, silica sol and / or alumina sol, organic acid and water evenly; carrying out molding, drying and calcinaton, and soaking in a VIII group metal oxide solution; and carrying out drying and calcination to obtain the catalyst. For the isomerization of straight-chain olefins, the catalyst is good in activity and stability, high in both conversion rate of straight-chain olefins and selectivity to iso-olefins and can be applied to the field of industrial production of the iso-olefins, such as the industrial production of isobutene and isoamylene.

Description

technical field [0001] The invention relates to a catalyst for preparing iso-alkenes by isomerizing linear olefins and a preparation method thereof. Background technique [0002] Isoalkenes such as isobutylene and isopentene are important basic organic feedstocks. Isobutylene is mainly used in the production of gasoline additives methyl tert-butyl ether (MTBE) and polyisobutylene. Isobutylene is also the main raw material for synthetic rubber such as butyl rubber. Raw material for acrylonitrile, antioxidant, etc. Isoamylene is one of the main intermediates in the production of pesticides, medicines and fragrances. [0003] Isoolefins are generally separated from by-products of steam cracking units or refinery catalytic cracking units (FCC), such as isobutene from mixed carbon four and isopentene from mixed carbon five. Depending on the relative volatility of the isoalkenes, there are different methods for isoalkene separation. It can be separated by common methods such a...

Claims

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Application Information

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IPC IPC(8): B01J29/67B01J29/68C07C5/27C07C11/09
Inventor 王伟跃
Owner 王伟跃
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