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Carrier of catalyst for preparing low-carbon alkene by dehydrogenation of low-carbon alkane and application of carrier

A catalyst carrier, low-carbon alkane technology, applied in the direction of catalyst carrier, hydrocarbons, hydrocarbons, etc., can solve the problems of large carbon deposition, rapid performance degradation and short single-pass life of the catalyst.

Active Publication Date: 2018-01-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that the catalyst has a large amount of carbon deposits, the performance declines rapidly during use, and the single-pass life is short.

Method used

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  • Carrier of catalyst for preparing low-carbon alkene by dehydrogenation of low-carbon alkane and application of carrier
  • Carrier of catalyst for preparing low-carbon alkene by dehydrogenation of low-carbon alkane and application of carrier
  • Carrier of catalyst for preparing low-carbon alkene by dehydrogenation of low-carbon alkane and application of carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Get 43.1g oxyfluoroniobic acid (H 2 (NbOF 5 )), 30.5g ammonium molybdate ((NH 4 ) 2 MoO 4 ) was dissolved in 1L of deionized water, and then 107.4g of silicon dioxide (80-120 microns in particle size) and 14.6g of germanium oxide (80-120 microns in particle size) were added to form a suspension; at 22°C, under vigorous stirring, the Slowly add 10% ammonia water dropwise into the mixed aqueous solution to form a precipitate, control the pH value to 7.8, stir for 2 hours, filter, wash with deionized water for 3 times, dry at 120°C, pulverize, and sieve at 700 ℃ for 16 hours to obtain a composite silica carrier. Pore ​​volume 0.49cm 3 / g, specific surface area 87m 2 / g. The composition and properties of the carrier are shown in Table 1.

[0027] The obtained carrier adopts impregnation technology to load the platinum component, that is, at room temperature, 15.0 g of the obtained carrier is impregnated with chloroplatinic acid (H 2 PtCl 6 6H 2O, 0.12g) in aqueo...

Embodiment 2

[0030] Get 44.8g oxyfluoroniobic acid (H 2 (NbOF 5 )), 15.3g ammonium molybdate ((NH 4 ) 2 MoO 4 ) was dissolved in 1L deionized water, and then 126.8g of silicon dioxide (particle size 80-110 microns) and germanium oxide 4.2g (particle size 60-100 microns) were added to form a suspension; at 25°C, under vigorous stirring, the Slowly add 6% ammonia water dropwise into the mixed aqueous solution to form a precipitate, control the pH value to 8.0, stir for 2 hours, filter, wash with deionized water for 3 times, dry at 120°C, pulverize, and sieve at 720 ℃ for 12 hours to obtain a composite silica carrier. Pore ​​volume 0.69cm 3 / g, specific surface area 104m 2 / g. The composition and properties of the carrier are shown in Table 1.

[0031] The obtained carrier adopts impregnation technology to load the platinum component, that is, at room temperature, 15.0 g of the obtained carrier is impregnated with chloroplatinic acid (H 2 PtCl 6 6H 2 O, 0.12g) in aqueous solution ...

Embodiment 3

[0034] Get 27.6g oxyfluoroniobic acid (H 2 (NbOF 5 )), 23.6g ammonium molybdate ((NH 4 ) 2 MoO 4 ) was dissolved in 1L of deionized water, and then 139.2g of silicon dioxide (30-80 microns in particle size) and 9.6g of germanium oxide (60-90 microns in particle size) were added to form a suspension; at 25°C, under vigorous stirring, the 15% ammonia water was slowly added dropwise to the mixed aqueous solution to form a precipitate, and the pH value was controlled to 8.0. After stirring for 2 hours, filter, wash with deionized water for 3 times, dry at 120°C, pulverize, and sieve the mixture at 820 ℃ for 8 hours to obtain a composite silica carrier. Pore ​​volume 0.72cm 3 / g, specific surface area 116m 2 / g. The composition and properties of the carrier are shown in Table 1.

[0035] The obtained carrier adopts impregnation technology to load the platinum component, that is, at room temperature, 15.0 g of the obtained carrier is impregnated with chloroplatinic acid (H ...

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Abstract

The invention relates to a carrier of a catalyst for preparing low-carbon alkene by dehydrogenation of low-carbon alkane and an application of the carrier, and mainly solves problems that in the priorpreparation art, a carbon deposit quantity of a catalyst is large, in a usage process, performance decline is quick, and regeneration is frequent. The carrier adopted by the invention comprises a Nb2O5.b MoO3.c MxOy.d SiO2, wherein M is one or more selected from Ge, Sn and Pb, SiO2 is at least one selected from diatomite, silicon oxide and a high-silicon Y type molecular sieve; and the carrier comprises the following components calculated by an oxide, by weight: 15-35.0% of Nb2O5; 5.0-15.0% of MoO3; 1.0-10.0% of MxOy; and 50-70% of SiO2, when the above technical scheme is used for preparing the low-carbon alkene by dehydrogenation of the low-carbon alkane, the problems are better solved, and the carrier can be used in industrial preparation of the catalyst for preparing the low-carbon alkene by dehydrogenation of the low-carbon alkane.

Description

technical field [0001] The invention relates to a catalyst carrier used for dehydrogenating low-carbon alkanes to produce low-carbon olefins and its application. Background technique [0002] Propylene / isobutylene mainly comes from the co-production or by-product of steam cracking and fluid catalytic cracking in refineries, and can be widely used in the synthesis of polymers, gasoline additives, rubber and various chemical intermediates. With the increasing demand for low-carbon olefins, the traditional production process is difficult to meet the rapid growth of market demand. A large amount of low-carbon alkanes obtained from refineries are the main components of liquefied petroleum gas, which are mainly used as civil fuels. The development of the process of producing low-carbon alkenes from low-carbon alkanes is of great significance for making full use of low-carbon alkanes to open up new sources of alkenes. At present, the alkane catalytic dehydrogenation technology is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J23/648C07C5/333C07C11/06C07C11/09
CPCY02P20/52
Inventor 吴文海樊志贵缪长喜姜冬宇
Owner CHINA PETROLEUM & CHEM CORP
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