Method for modifying kaolinite

Abstract

A process for modifying kaolinite includes such steps as proportionally mixing kaolinite, dispersing modifier, acid solution and deionized water, beating, calcining, cooling, and washing with deionized water. The modified kaolinite has large specific surface area and pore volume, and high catalytic activity.

Description

technical field

[0001] The present invention relates to a modification method of kaolin, more specifically a modification method of raw material kaolin for preparing hydrocarbon catalytic cracking catalyst. Background technique

[0002] Kaolin is the most commonly used component in semi-synthetic catalytic cracking (FCC) catalysts as the matrix of the catalyst. The original kaolin has small specific surface area and pore volume, few active centers and limited cracking ability. By modifying, improving the pore structure of kaolin and increasing its active center, the cracking ability as a catalyst matrix can be improved.

[0003] With the development of the oil refining industry towards the direction of deep processing, the catalytic cracking of heavy oil blending heavy distillates has become an important way to improve economic benefits, and the development of catalysts with strong heavy oil cracking capacity is a key part of it. The cracked feedstoc...

Examples

Embodiment 1

[0025] Mix 500 grams of kaolin (produced by China Kaolin Industry Co., Ltd.) with 400 ml of water, 10 g of sodium polyacrylate and 600 ml of hydrochloric acid (1.2N), beating for 2 hours to mix the kaolin acid slurry uniformly, roast the slurry at 600 ° C for 2 hours, and then cool , washed with deionized water until free of acid radicals, and dried to obtain modified kaolin sample A-1. Its physicochemical properties are listed in Table 2.

Embodiment 2

[0027] Mix 500 g of kaolin with 400 ml of water, 5 g of ammonium hydrogen phosphate and 600 ml of sulfuric acid (0.5N), beating for 2 hours to make the kaolin acidic slurry evenly mixed, roast the slurry at 850°C for 2 hours, then cool and wash with deionized water until Without acid radicals, it was dried to obtain the modified kaolin sample A-2. Its physicochemical properties are listed in Table 2.

Embodiment 3

[0029] Mix 500 g of kaolin with 400 ml of water, 10 g of sodium polyphosphate and 600 ml of nitric acid (2.2N), beating for 2 hours to make the kaolin acid slurry evenly mixed, roast the slurry at 600°C for 1 hour, then cool and wash with deionized water To no acid radicals, dry to obtain modified kaolin sample A-3. Its physicochemical properties are listed in Table 2.

technical field

[0001] The present invention relates to a modification method of kaolin, more specifically a modification method of raw material kaolin for preparing hydrocarbon catalytic cracking catalyst. Background technique

[0002] Kaolin is the most commonly used component in semi-synthetic catalytic cracking (FCC) catalysts as the matrix of the catalyst. The original kaolin has small specific surface area and pore volume, few active centers and limited cracking ability. By modifying, improving the pore structure of kaolin and increasing its active center, the cracking ability as a catalyst matrix can be improved.

[0003] With the development of the oil refining industry towards the direction of deep processing, the catalytic cracking of heavy oil blending heavy distillates has become an important way to improve economic benefits, and the development of catalysts with strong heavy oil cracking capacity is a key part of it. The cracked feedstoc...

Examples

Embodiment 1

[0025] Mix 500 grams of kaolin (produced by China Kaolin Industry Co., Ltd.) with 400 ml of water, 10 g of sodium polyacrylate and 600 ml of hydrochloric acid (1.2N), beating for 2 hours to mix the kaolin acid slurry uniformly, roast the slurry at 600 ° C for 2 hours, and then cool , washed with deionized water until free of acid radicals, and dried to obtain modified kaolin sample A-1. Its physicochemical properties are listed in Table 2.

Embodiment 2

[0027] Mix 500 g of kaolin with 400 ml of water, 5 g of ammonium hydrogen phosphate and 600 ml of sulfuric acid (0.5N), beating for 2 hours to make the kaolin acidic slurry evenly mixed, roast the slurry at 850°C for 2 hours, then cool and wash with deionized water until Without acid radicals, it was dried to obtain the modified kaolin sample A-2. Its physicochemical properties are listed in Table 2.

Embodiment 3

[0029] Mix 500 g of kaolin with 400 ml of water, 10 g of sodium polyphosphate and 600 ml of nitric acid (2.2N), beating for 2 hours to make the kaolin acid slurry evenly mixed, roast the slurry at 600°C for 1 hour, then cool and wash with deionized water To no acid radicals, dry to obtain modified kaolin sample A-3. Its physicochemical properties are listed in Table 2.

Images