Catalyst in preparation of isobutene by methyl tertbutyl ether pyrolysis

A technology of methyl tert-butyl ether and isobutylene, which is applied in the field of catalyst and its preparation, can solve the problems of no catalytic activity and catalyst performance impact, and achieve the effects of increased processing capacity, good activity and selectivity, and improved activity

Active Publication Date: 2006-11-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"Fine Petrochemical Industry" in 1997, No. 4, Page 1-4, published an article titled "Research Progress in MTBE Cracking to Isobutene Catalysts", from the section "Silicon Oxide Catalytic System", when using oxidation For silicon-based catalysts, silicon oxide alone has almost no catalytic activity
After adding a small amount of alumina or modifying with a small amount of alumina, although its activity and selectivity are greatly improved, the catalyst performance is significantly affected by the purity of the silica raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of amorphous silicon aluminum WA1 is as follows: immerse 50g of amorphous silicon aluminum WA into 100mlBe(NO 3 ) 2 In the aqueous solution, the concentration of the solution is 0.1 mol / L, and after impregnation, it is baked at 400° C. for 6 hours to obtain amorphous silicon-aluminum WA1 containing 0.3 wt % of beryllium oxide.

[0025] The preparation method of amorphous silicon aluminum WA2 is as follows: immerse 50g amorphous silicon aluminum WA into 100mlNi(NO 3 ) 2 In the aqueous solution, the concentration of the solution is 0.1 mol / L, and after impregnation, it is baked at 400° C. for 6 hours to obtain amorphous silicon-aluminum WA2 containing 0.4 wt % of nickel oxide.

[0026] The preparation method of amorphous silicon aluminum WC1 is as follows: immerse 50g of amorphous silicon aluminum WC in 100ml Be(NO 3 ) 2 In the aqueous solution, the concentration of the solution is 0.1 mol / L, and after impregnation, it is baked at 400° C. for 6 ...

Embodiment 2

[0029] Amorphous silica-alumina WA, WA1, WA2, WB, WC, WC1, WD and WD1 were installed in reactors respectively, and treated with saturated steam under different conditions to obtain catalysts ZF1-ZF8. The specific treatment conditions are shown in Table 2 .

Embodiment 3

[0031]The catalysts ZF1-ZF8 obtained after the treatment were respectively lowered to the reaction temperature, and the MTBE cracking reaction was carried out under the reaction conditions in Table 3, and the results are shown in Table 3.

[0032]

[0033] catalyst

[0034] Note: The selectivities of methanol and isobutene are both greater than 99%.

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Abstract

A catalyst for preparing isobutene by cracking methyl turt-butyl ether (MTBE) is prepared from the amorphous SiAl through treating by saturated steam at 100-600 deg.C for 1-10 hr. Its advantages are high conversion rate of MTBE, high selectivity to isobutene, and long service life (at least 3504 hr).

Description

technical field [0001] The invention relates to a catalyst for producing isobutene by cracking methyl tert-butyl ether and a preparation method thereof. Background technique [0002] Isobutene is an important organic chemical raw material. High-purity isobutene is widely used in the production of butyl rubber, polyisobutene and other products. Methyl tert-butyl ether (MTBE) cracking to produce high-purity isobutene is an advanced and economical method among many methods. A better method. The core of this technology is to develop a catalyst with excellent MTBE cracking conversion rate and isobutene selectivity. [0003] At present, the catalysts that are applied to the cracking performance of MTBE are: alumina-based catalysts, silica-based catalysts, ion-exchange resin catalysts (such as DE 3509292, DE 3210435, US 4447668, GB 1482883, US 4570026, US 4551567), sulfate Catalyst (such as JP 7626401), activated carbon catalyst (such as JP 7494602), solid phosphoric acid catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/12B01J37/10C07C1/20C07C11/02
CPCC07C1/20C07C2521/12
Inventor 张淑梅翟庆铜王春梅马皓乔凯郭长新
Owner CHINA PETROLEUM & CHEM CORP
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