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A kind of kaolin used for full clay type catalytic cracking catalyst

A catalytic cracking and kaolin technology, applied in physical/chemical process catalysts, catalyst supports, inorganic chemistry, etc., can solve problems such as high pore volume and specific surface area, increased proportion of mesopores, low specific area and pore volume, etc. Achieve the effect of improving catalytic activity, increasing specific surface area and reducing viscosity

Active Publication Date: 2016-01-20
茂名市茂群高岭土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The pore size of unmodified kaolin is generally large, the relative area and pore volume are low, and the adsorption capacity is insufficient, which cannot meet the requirements of catalyst use. The proportion is greatly increased, the distribution is concentrated, the pore volume and specific surface area of ​​about 3mm are very high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: adopt the following steps to realize the present invention:

[0018] (1) Excavate the loosened kaolin mineral material in Maoming area, Guangdong Province, and initially separate the clay and impurities to obtain the kaolin base material, mix the base material with 2.5% of the base material mass of sodium silicate and sodium hexametaphosphate solution ( The ratio of sodium silicate to sodium hexametaphosphate solution is 2:1) for pulping and desanding to obtain the primary material of kaolin slurry;

[0019] (2) Transport the raw material of kaolin slurry to the slurry storage tank for stirring, adjust the pH value of the system to 9, add anionic polycarboxylate dispersant to react for 8 minutes, the amount of dispersant is 5ppm based on the primary material of kaolin slurry, and then add concentration 3%, the amount of 0.5% hydrogen peroxide and the amount of 0.6% sodium dithionite solution for the quality of the kaolin slurry initial material carry out c...

Embodiment 2

[0021] Embodiment 2: adopt the following steps to realize the present invention:

[0022] (1) Excavate the loosened kaolin mineral material in Maoming area, Guangdong Province, and initially separate the clay and impurities to obtain the kaolin base material, mix the base material with 1% sodium silicate and sodium hexametaphosphate solution ( The ratio of sodium silicate to sodium hexametaphosphate solution is 2:1) for pulping and desanding to obtain the primary material of kaolin slurry;

[0023] (2) Transport the raw material of kaolin slurry to the storage tank for stirring, adjust the pH value of the system to 8.5, add anionic polycarboxylate dispersant to react for 10 minutes, the amount of dispersant is 510ppm based on the primary material of kaolin slurry, and then add the concentration 10%, consumption is the 0.6% sodium hypochlorite solution of kaolin pulp primary material quality and consumption is the 0.8% sodium dithionite solution of kaolin pulp primary material ...

Embodiment 3

[0025] Embodiment 3: adopt the following steps to realize the present invention:

[0026] (1) Excavate the loosened kaolin mineral material in Maoming area, Guangdong Province, and obtain the kaolin base material after preliminary separation of clay and impurities. Mix the base material with 5% sodium silicate and sodium hexametaphosphate solution ( The ratio of sodium silicate to sodium hexametaphosphate solution is 3:1) for pulping and desanding to obtain the primary material of kaolin slurry;

[0027] (2) Transport the raw material of kaolin slurry to the storage tank for stirring, adjust the pH value of the system to 10, add anionic polyphosphate dispersant to react for 10 minutes, the amount of dispersant is 10ppm based on the primary material of kaolin slurry, and then add a concentration of 30 %, consumption is that the hydrogen peroxide of 0.4% of kaolin pulp initial material quality and consumption are that the sodium dithionite solution of 0.5% of kaolin pulp initial...

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Abstract

The invention discloses kaolin for a kaolinic catalytic cracking catalyst. Preparation comprises the steps: preferably adopting a kaolin soil source of a Guangdong Maoming area, and carrying out ore slurry initial material preparation, ore slurry concentrate preparation, chemical bleaching, acidic water washing, press filtration, drying and other steps to obtain the finished product. In the preparation process, after an ore slurry initial material is prepared, a dispersant is added, repulsive interaction between particles with the same charge is promoted through regulating the electric charge of the kaolin, under an alkaline pH condition, the kaolin is dispersed uniformly and has better stability, and the viscosity is reduced; after chemical bleaching, the specific surface area of finally-obtained kaolin microsphere particles is increased, and the catalytic activity is further enhanced. The kaolin is used for preparation of the kaolinic catalyst, the relatively crystallinity of crystallization balls of the obtained catalyst is high, the microreaction activity of the catalyst is high, the specific surface area, the pore volume and other properties are also better than those of a kaolinic catalyst prepared by Suzhou kaolin, and the reaction performance is better.

Description

technical field [0001] The invention relates to a kaolin, in particular to a kaolin used for an all-clay type catalytic cracking catalyst. Background technique [0002] The reason why kaolin can be used in the production of cracking catalysts is that after roasting and chemical modification, kaolin has a certain mesopore structure and certain catalytic performance, and is an excellent catalyst raw material. Due to the weak acidity of the surface of kaolin, it is the weakest catalyst in cracking catalysts. The L-acid center of the kaolin has strong cracking performance on heavy oil molecules with a diameter of more than 5cm. In addition, kaolin has strong acid catalytic activity and high hydrothermal stability, is widely distributed, and is cheap and easy to obtain. With the rapid development of the economy, the market competition of FCC catalysts is becoming more and more fierce. Abroad, the total production of FCC catalysts by Akzo Company in the Netherlands, WR. Grace Comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/40B01J21/16B01J32/00
Inventor 李勇华
Owner 茂名市茂群高岭土有限公司
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