A kind of preparation method of carbon-containing catalyst carrier

A catalyst carrier and carrier technology, applied in the direction of catalyst carrier, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as high cost, complicated preparation process, and difficulty in large-scale industrialization

Active Publication Date: 2011-12-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing carbon coating method has a complicated preparation process and high cost, making it difficult to be industrialized on a large scale.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] 2. Add in the preparation process of alumina dry rubber powder, such as introducing by co-precipitation or step-by-step precipitation. Then, the carbon-free alumina carrier is obtained by extruding the alumina dry rubber powder, drying and calcining.

[0028] 3. Add the acid solution to the alumina dry rubber powder, knead until it becomes a plastic body, extrude it on an extruder, then dry and roast it to make a carrier. Then impregnate the alumina support strip with a solution containing VIB and / or VIII metal components, dry and calcinate to make a carbon-free alumina support.

[0029] One or more of extrusion aids, adhesives, peptizers, and other additives required for the catalyst can be added to the above-mentioned alumina dry rubber powder, and the amount added can be determined according to the properties of the prepared catalyst according to the knowledge in the art. The alumina dry rubber powder used is the pseudo-boehmite produced by the aluminum chloride-amm...

Embodiment 1

[0035] This example introduces the preparation of carbon-free alumina carrier by using pseudo-boehmite dry rubber powder. Dry rubber powder specific surface area is 370m 2 / g, the pore volume is 0.90ml / g.

[0036] Weigh 300g of dry rubber powder, add 100g of SB powder, add 6g of citric acid and 6g of safflower powder, mix well, add 345g of acidic solution, HNO in the acidic solution 3 The concentration is 1.74%, and the rest is distilled water. After rolling for 20 minutes, extrude the strips with a clover orifice plate with a diameter of 1.7mm. After drying at 120°C for 4h and then calcining at 500°C for 3h, the obtained alumina carrier bar is marked as A.

Embodiment 2

[0038] This example introduces the preparation of carbon-free support by using pseudo-boehmite dry rubber powder and nickel nitrate. Dry rubber powder specific surface area is 370m 2 / g, the pore volume is 0.90ml / g.

[0039] Weigh 300g of dry rubber powder, add 100g of SB powder, add 6g of citric acid and 6g of safflower powder, mix well, add 345g of acidic solution, HNO in the acidic solution 3 The concentration is 1.74%, the nickel nitrate content is 3.9%, and the rest is distilled water. After rolling for 20 minutes, extrude the strips with a clover orifice plate with a diameter of 1.7mm. Dry at 120°C for 4h, then bake at 500°C for 3h, and the obtained carrier bar is marked as B.

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Abstract

The invention discloses a method for preparing a carbon-containing catalyst carrier. Firstly, a carbon-free porous inorganic refractory oxide carrier is prepared, and carbon precursors are impregnated on the carbon-free inorganic refractory oxide carrier. After preparing the carbon-free carrier and / or When impregnating the carbon precursor, the metal additive is introduced, and then the porous inorganic refractory oxide carrier loaded with the carbon precursor and the metal additive is heat-treated, and the carbon precursor is decomposed into carbon to obtain a carbon-containing catalyst carrier. In the preparation process of the catalyst carrier of the present invention, the carbon precursor is decomposed through the promotion of a small amount of metal additives, avoiding harsh treatment conditions, forming a covering on the surface of the catalyst carrier, adjusting the surface properties of the catalyst carrier, and achieving the purpose of improving the performance of the catalyst . Compared with the precursor in which carbon is added during the forming process of the carrier, the method of the invention has the advantages of improving the strength of the carrier and the utilization rate of carbon in the carrier, and greatly improves the activity of hydroprocessing of heavy distillate oil.

Description

technical field [0001] The invention relates to a preparation method of a carbon-containing catalyst support, in particular to a preparation method of a carbon-containing hydrogenation catalyst support. Background technique [0002] Most traditional hydrotreating catalysts use Al 2 o 3 As a carrier, but active Al 2 o 3 (such as γ-Al 2 o 3 ) has more Lewis acid centers, which can easily lead to coking of the catalyst, and γ-Al 2 o 3 There is a strong interaction between the carrier and the metal component, which makes it difficult for the metal component to transform into a highly active active phase. [0003] It is believed that the type II active phase is fully vulcanized and is stacked (stacked) MoS 2 Structure, Co-Mo-S active phase with high sulfur coordination, usually stacked (stacked) together by larger sheets, not connected to the carrier, each active center of type II active phase has high potential activity, hydrogenation of thiophene The activity of desulf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J21/16B01J23/888
Inventor 杨占林彭绍忠姜虹刘雪玲
Owner CHINA PETROLEUM & CHEM CORP
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