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Process for preparation of high activity W-based catalysts and uses thereof

A catalyst and disproportionation technology, applied in the field of W-based catalysts, can solve problems such as poor selectivity

Active Publication Date: 2011-11-09
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned catalyst is used in the reaction of producing propylene from ethylene and butene, and its selectivity is poor

Method used

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  • Process for preparation of high activity W-based catalysts and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 30g hydrogen type Y molecular sieve (same as comparative example 1), add 20g aluminum oxide (dry basis) and 5.5g solid WO 3 Powder, mix well and grind for 10 minutes, take 10g. Then the air is introduced at the same time (7200h -1 ) and water vapor (water vapor / air=0.31 (v / v)), the temperature was raised to 590° C. for 3 hours at 5° C. / min. The resulting mixture is tableted and crushed to finally obtain B catalyst with a weight loading of 10% of 20 to 40 mesh W. (Adopting aluminum oxide can also be silicon dioxide or clay, and the following embodiments are all the same.)

Embodiment 2

[0026] Prepare hydrogen type Y molecular sieve, WO according to the process described in embodiment 1 3 And the powder of aluminum oxide, get 10g. Then the air was introduced simultaneously (8500h -1 ) and water vapor (water vapor / air = 0.15 (v / v)), heated at 8 °C / min to 680 °C for 1 hour, and finally obtained a C-catalyzed system with a W weight loading of 8.8%.

Embodiment 3

[0028] Take by weighing 37g hydrogen type Y molecular sieve (with comparative example 1), add 11g aluminum oxide (dry basis), 2g silicon dioxide (dry basis) and 8.3g solid WO 3 Powder, after mixing evenly, grind for 10 minutes, the obtained powder takes 10g. Then air was introduced simultaneously (2400h -1 ) and water vapor (steam / air=0.45 (v / v)), heated up to 620° C. for 10 hours at 6° C. / min, and finally obtained a D catalyst with a W weight loading of 13.3%.

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Abstract

A W-based catalyst preparing the propylene with the ethane and butylene disproportionation takes the Y molecular sieve as the carrier which bears the active component of tungsten oxide solid powder; the bearing quantity of the active component ranges from 5 percent to 16 percent of the catalyst weight; the carrier is the mixture carrier added with inertia component, wherein, hydrogen-typed Y molecular sieve weight at least occupies 50 percent of the mixture carrier weight. The preparation method is that the hydrogen-typed Y molecular sieve, the tungsten trioxide and the inertia mechanism are mixed and are roasted in dry or steam-contained flow air for 0.5 hour through 24 hours under the temperature ranging from 400 DEG C to 750 DEG C, and the W-based catalyst is prepared. The catalyst of the invention is used for the reaction of preparing the propylene with the ethane and butylene disproportionation on a fixed bed reactor, and has the advantages of high selection, high rate of conversion and good stability.

Description

technical field [0001] The invention relates to a W-based catalyst. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The present invention also relates to the application of the above-mentioned catalyst in the disproportionation reaction of ethylene and butene to produce propylene. Background technique [0004] Propylene is one of the important basic raw materials for the development of petrochemical industry, and it is also the petrochemical product with the fastest growing demand in the world. The demand for propylene in the world has increased from 18 million tons in 1980 to nearly 50 million tons in 2000, and it is expected to reach 50 million tons in 2010. 75 million tons. The production of propylene by reacting ethylene and butene is one of the methods to increase the output of propylene. Since the supply of butene exceeds the demand at present, especially 2-butene lacks effective utilization ways, so the re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01J37/02B01J29/08B01J21/04B01J21/08B01J21/16C07C11/06C07C6/00
CPCY02P20/52
Inventor 徐龙伢黄声骏辛文杰王清遐刘盛林
Owner CHINA PETROLEUM & CHEM CORP