Catalyst for refining coking crude benzene and preparation method thereof

A technology of coking crude benzene and catalyst, which is applied in the field of refractory chemical industry, can solve the problems of insufficient contact of cobalt and molybdenum, unfavorable production efficiency and production cost, easy saturation of loading capacity, etc., and achieves the advantages of industrial production, convenient preparation process and short preparation cycle shortening effect

Active Publication Date: 2016-05-04
无锡市强亚耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst produced by this method has insufficient contact between cobalt and molybdenum and the carrier, and the loading capacity is easily saturated, which will have many disadvantages to production efficiency and production cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of catalyst mass percentage of 80% Al 2 o 3 , 15% MoO 3 and 5% CoO: take by weighing cobalt nitrate and ammonium molybdate according to the content of Mo and Co in the composition, add distilled water and prepare cobalt-molybdenum co-molybdenum co-impregnation solution that the weight percentage content of cobalt-molybdenum is 60%; Al 2 o 3 The carrier was added to the prepared co-molybdenum co-impregnation solution for 7 hours, and the immersion temperature was 60°C; 2 o 3 The carrier is impregnated with 40% Al(OH) 3 solution for 3 hours, and the impregnation temperature was 60°C; the impregnated Al 2 o 3 The carrier was dried at 80°C for 2 hours, and then dried at 100°C for 14 hours; the dried Al 2 o 3 The carrier is at 480-520°C, and the calcination time is 4-6 hours.

Embodiment 2

[0032] Preparation of Al with a catalyst mass percentage of 85% 2 o 3 , 10% MoO 3 and 5% CoO: take by weighing cobalt nitrate and ammonium molybdate according to the content of Mo and Co in the composition, add distilled water and prepare cobalt-molybdenum co-molybdenum co-impregnation solution that the weight percentage content of cobalt-molybdenum is 65%; Al 2 o 3 The carrier was added to the prepared co-molybdenum co-impregnation solution for 8 hours, and the immersion temperature was 70°C; 2 o 3 The carrier is impregnated with 40% Al(OH) 3 solution for 4 hours, and the impregnation temperature was 50°C; the impregnated Al 2 o 3 The carrier was dried at 90°C for 3 hours, and then dried at 110°C for 12 hours; the dried Al 2 o 3 The carrier is at 480-520°C, and the calcination time is 4-6 hours.

Embodiment 3

[0034] Preparation of catalyst mass percentage of 84% Al 2 o 3 , 14% MoO 3 and 2% CoO: take by weighing cobalt nitrate and ammonium molybdate according to the content of Mo and Co in the composition, add distilled water and prepare cobalt-molybdenum co-molybdenum co-impregnation solution that the weight percentage content of cobalt-molybdenum is 70%; Al 2 o 3 The carrier was added to the prepared co-molybdenum co-impregnation solution for 9 hours, and the immersion temperature was 80°C; 2 o 3 The carrier is impregnated with 40% Al(OH) 3 solution for 5 hours, and the impregnation temperature was 40°C; the impregnated Al 2 o 3 The carrier was dried at 100°C for 4 hours, and then dried at 120°C for 10 hours; the dried Al 2 o 3 The carrier is at 480-520°C, and the calcination time is 4-6 hours.

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PUM

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Abstract

The invention discloses a catalyst for refining coked crude benzene. At the same time, the invention also discloses a preparation method of the catalyst. The catalyst adopts a spherical gamma-Al2O3 carrier, an active components is dipped by use of a co-dipping method, and is particularly dipped in an Al (OH) 3 solution, cobalt and molybdenum can better combined with the carrier, the carrier is completely wrapped to form a crystalline body without introduction of other impurities; the preparation method can regulate loading amount of the active component, atomic ratio and calcination temperature of the active component, and the prepared catalyst is far higher in hydrogen desulfurization activity and three benzene retention rate compared with catalysts of the same kind; at the same time, by use of the co-dipping method, the catalyst preparation cycle is shorter, the preparation process is more convenient, and the preparation method is more conducive to industrial production.

Description

technical field [0001] The invention belongs to the field of refractory chemical industry, and in particular relates to a catalyst for refining coking crude benzene and a preparation method thereof. Background technique [0002] Crude benzene is a by-product of the coking process with complex components. Crude benzene can be refined to obtain important chemical raw materials such as benzene, toluene and xylene. Crude benzene refining methods include pickling and hydrofining. For the sake of environmental protection and economic benefits, hydrofining has gradually taken the dominant position. It is of great significance to study the catalysts matched with the low-temperature hydrofining process of crude benzene. [0003] At present, the preparation method of the traditional catalyst is to impregnate the alumina carrier with cobalt-molybdenum solution, then dry and bake. However, the catalyst produced by this method has insufficient contact between cobalt and molybdenum and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/882B01J37/02
Inventor 周志强唐震俞开芳
Owner 无锡市强亚耐火材料有限公司
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