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Carbon-coated aluminum oxide carrier with bimodal pore structure, and preparation method thereof

A carbon-alumina, bimodal pore technology, applied in the field of carbon-coated alumina carrier and its preparation, can solve problems such as inapplicability, and achieve the effects of simple equipment, economical cost saving, and high mechanical strength

Active Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is obviously not applicable to surface carbon-coated catalysts, and calcination under aerobic conditions will burn off the carbon on the surface of the carrier and the physical pore-forming agent together.

Method used

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  • Carbon-coated aluminum oxide carrier with bimodal pore structure, and preparation method thereof
  • Carbon-coated aluminum oxide carrier with bimodal pore structure, and preparation method thereof
  • Carbon-coated aluminum oxide carrier with bimodal pore structure, and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] The preparation of embodiment 1 ammonium aluminum carbonate A1

[0027] Weigh 100g of aluminum hydroxide dry rubber powder (Yantai Henghui Chemical Co., Ltd.), 310g of ammonium bicarbonate (product of Beijing Chemical Factory) and 15mL of polyethylene glycol (PEG-400, Tianjin Guangfu Chemical Reagent Factory) and add them to 600mL of deionized water Stir, then transfer the mixed material into a 1L airtight pressure vessel lined with polytetrafluoroethylene, sink at 100°C for 8 hours, filter and dry the resulting white filter cake at 100°C for 4 hours to obtain ammonium aluminum carbonate A1.

Embodiment 2

[0028] The preparation of embodiment 2 ammonium aluminum carbonate A2

[0029] Weigh 400g of aluminum nitrate (product of Beijing Chemical Plant), 300g of ammonium bicarbonate and 15mL of polyethylene glycol, mix and grind for 20 minutes, then transfer the mixed material into a 1L airtight pressure vessel with a polytetrafluoroethylene liner, at 100°C Precipitate for 8 hours, filter and dry the resulting white filter cake at 100°C for 4 hours to obtain aluminum ammonium carbonate A2.

Embodiment 3

[0032] The weight ratio of hydrated alumina to aluminum ammonium carbonate is 1:9, and the ratio of the weight sum of hydrated alumina and aluminum ammonium carbonate to the carbon precursor is 7:3. Take by weighing 10g pseudo-boehmite dry rubber powder (Shanghai Xinnian Petrochemical Auxiliary Factory), mix 90 grams of ammonium aluminum carbonate A1, use 30g glucose (Tianjin Guangfu Chemical Reagent Factory) as carbon precursor and 2.5g concentrated nitric acid (mass Fraction is 69.2%, Beijing chemical factory product) and 80g deionized water are made into solution, then mixed and stirred to form a plastic body, extruded into Ф1.2mm strips on the extruder, dried at 100°C for 4 hours, and then dried under N 2 Under the atmosphere, the temperature was raised from room temperature to 550° C. for 1 hour and kept for 4 hours to obtain a carbon-coated alumina carrier a, whose physical and chemical properties are shown in Table 1.

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Abstract

The invention discloses a carbon-coated aluminum oxide carrier with bimodal pore structure, and a preparation method thereof. The preparation method comprises: (1) mixing hydrated alumina and ammonium aluminum carbonate, mixing with a carbon precursor, kneading into a plasticized body, and obtaining a molded material by using a physical molding method, wherein a weight ratio of the hydrated alumina to the ammonium aluminum carbonate is 1:9-9:1, and the sum of the weight of the hydrated alumina and the ammonium aluminum carbonate to the carbon precursor is 7:3-19:1; and (2) drying the molded material obtained in the step (1) at a temperature of 50-100 DEG C, and carrying out heat treatment in an oxygen-free atmosphere to obtain the carbon-coated aluminum oxide carrier with the bimodal pore structure. According to the present invention, the process of the preparation method is simple, the bimodal pore structure covers on the surface of the prepared carbon-coated aluminum oxide carrier, and the carbon-coated aluminum oxide carrier can be used as the adsorbent and the catalyst carrier.

Description

technical field [0001] The invention relates to a carbon-coated alumina carrier with a bimodal pore structure and a preparation method thereof, which is particularly suitable as a catalyst carrier for hydrogenation pretreatment of heavy distillate oils such as vacuum distillate oil, coking wax oil, atmospheric residue oil and coal tar. . Background technique [0002] Petroleum resources are becoming increasingly scarce, and the trend of heavy and inferior crude oil is becoming more and more obvious. More and more heavy wax oils with high sulfur content and high nitrogen content need to be lightened. However, the current catalytic cracking technology is not suitable for processing raw materials with sulfur content greater than 0.6% and heavy metal content greater than 20ppm. Therefore, it is necessary to carry out hydrogenation pretreatment on heavy wax oil. The heart of the hydrotreating process is the hydrogenation catalyst. Since most of the sulfur-containing and nitrog...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/32B01J21/18B01J32/00B01J35/10C10G47/04
CPCB01J20/0248B01J20/20B01J20/3204B01J20/3217B01J20/324B01J21/18B01J2220/42B01J2220/46B01J2220/4806C10G2300/1037C10G2300/1096C10G2300/107C10G2300/1074B01J35/647B01J35/651B01J35/69
Inventor 陈胜利王远蒋红军娄亚峰袁桂梅
Owner CHINA PETROLEUM & CHEM CORP
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