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Catalyst for producing isobutene by dehydrogenating isobutane

A technology of dehydrogenation catalyst and isobutane, applied in the direction of catalyst, catalyst carrier, carbon compound catalyst, etc., can solve the problem of low activity and selectivity of isobutane dehydrogenation catalyst

Inactive Publication Date: 2021-04-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by this invention is the low problem of isobutane dehydrogenation catalyst activity and selectivity in the prior art, and a kind of isobutane dehydrogenation production isobutene catalyst is provided

Method used

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  • Catalyst for producing isobutene by dehydrogenating isobutane
  • Catalyst for producing isobutene by dehydrogenating isobutane
  • Catalyst for producing isobutene by dehydrogenating isobutane

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Weigh 1372.4 grams of aluminum nitrate, 5.94 grams of PVA, 220 milliliters of water, add 3.70 grams of magnesium nitrate at the same time, stir for 30 minutes, add ammonia water dropwise to keep the pH value at 9.5, leave the sol overnight, and then move it into an autoclave at 150 ° C Conditions, kept for 24 hours, then cooled the sample, washed 3 times with deionized water, until the Cl in the filtrate - , SO 4 - The ion content is lower than 50ppm; dry at 100°C for 6 hours, move into a muffle furnace and bake at 650°C for 4 hours to obtain an alumina carrier. Get 100 grams of aluminum oxide to carry out tabletting, sieve, and record as carrier I. Weigh 79 grams of chromium nitrate, 1.26 grams of sodium titanate, and 6.9 grams of ammonium vanadate, add them to 100 milliliters of deionized water, then add 82 grams of alumina carrier I, adjust the pH value of the solution to 3.5 with 2.5% ammonia water, and then After soaking in a water bath at 80°C for 1 hour, the s...

Embodiment 2

[0049] Weigh 500 grams of silica sol with a solid content of 20%, add 100 milliliters of water, and add 3.70 grams of magnesium nitrate at the same time, stir for 30 minutes, add ammonia water dropwise to form a sol, place the sol overnight, then move it into an autoclave, and heat it at 150 ° C. , kept for 24 hours, then cooled the sample, washed three times with deionized water; dried at 100°C for 6 hours, moved into a muffle furnace and calcined at 650°C for 4 hours to obtain a silica carrier. Get 100 grams of silicon oxide for tableting and sieving, and record it as carrier I. Weigh 79 grams of chromium nitrate, 1.26 grams of sodium titanate, and 6.9 grams of ammonium vanadate, add them to 100 milliliters of deionized water, then add 82 grams of silica carrier I, adjust the pH value of the solution to 3.5 with 2.5% ammonia water, and then After soaking in a water bath at 80°C for 1 hour, the sample was taken out for filtration, dried in an oven at 120°C for 8 hours, and th...

Embodiment 3

[0051] Weigh 1372.4 grams of aluminum nitrate, 5.94 grams of PVA, 300 milliliters of water, add 3.70 grams of magnesium nitrate at the same time, stir for 30 minutes, add ammonia water dropwise to keep the pH value at 9.5, leave the sol overnight, and then move it into an autoclave at 150 ° C Conditions, kept for 48 hours, then cooled the sample, washed 3 times with deionized water, until the Cl in the filtrate - , SO 4 - The ion content is lower than 50ppm; dry at 100°C for 6 hours, move into a muffle furnace and bake at 650°C for 4 hours to obtain an alumina carrier. Get 100 grams of aluminum oxide to carry out tabletting, sieve, and record as carrier I. Weigh 79 grams of chromium nitrate, 1.26 grams of sodium titanate, 12.14 grams of niobium oxalate, add to 100 milliliters of deionized water, then add 82 grams of alumina carrier I, adjust the pH value of the solution to 3.5 with 2.5% ammonia water, and then After soaking in a water bath at 80°C for 1 hour, the sample was...

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Abstract

The invention relates to a catalyst for producing isobutene by dehydrogenating isobutane, which takes VIB group elements in a periodic table of elements as main active components, at least one element in IIA group of the periodic table of elements as an alkaline assistant, at least one element in IVB group and VB group of the periodic table of elements as other assistants, and silicon-aluminum oxide as a carrier; wherein the carrier is treated by a hot solution containing group IIA elements in the periodic table of elements, and then is loaded with other components to obtain the dehydrogenation catalyst with the specific surface area of 100-300 m2 / g and the average pore size of 2-20 nm. The catalyst obtained by the method can improve the activity and selectivity of the isobutane dehydrogenation catalyst prepared by the prior art, and can be used for industrial application of isobutane dehydrogenation.

Description

technical field [0001] The invention relates to a catalyst for isobutane dehydrogenation to produce isobutene. Background technique [0002] Butene is an important petrochemical basic raw material second only to ethylene and propylene. As an intermediate product of important chemicals, isobutene can be used to produce butyl rubber, polyisobutylene, diisobutylene, triisobutylene, methyl methacrylate, tert-butanol , methacrylic acid, methacrylonitrile and isoprene and other deep-processed products. Worldwide, the main source of isobutene is obtained through the catalytic cracking unit (FCC) of the refinery and the C4 fraction raffinate of the cracking ethylene unit. Almost all of the isobutene resources in my country come from the FCC unit and steam cracking unit of the refinery. Due to the process, etc. aspect limit, our C 4 Hydrocarbon utilization rate has been low, only about 40%, while it reaches 80% in European and American countries. With the deepening of crude oil pro...

Claims

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Application Information

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IPC IPC(8): B01J23/26B01J23/30B01J32/00B01J23/02B01J21/10B01J35/10C07C5/333C07C11/09
CPCB01J23/26B01J23/30B01J23/02B01J21/10B01J23/002C07C5/3332C07C2523/26C07C2523/30B01J2523/00B01J35/60B01J35/615B01J35/647C07C11/09B01J2523/22B01J2523/31B01J2523/47B01J2523/55B01J2523/67B01J2523/41B01J2523/56B01J2523/57B01J2523/69
Inventor 吴省洪学思缪长喜姜冬宇
Owner CHINA PETROLEUM & CHEM CORP
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