A kind of kaolin used for preparing heavy oil catalytic cracking catalyst

A technology of cracking catalyst and heavy oil catalysis, applied in the field of kaolin, can solve the problems of high viscosity of kaolin, high fluidity of kaolin, wear resistance of gel formation, etc., and achieve the effects of low product wear index, short colloid gel time, and good hydrothermal stability.

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

[0006] The object of the present invention is to address above-mentioned deficiencies, provide a kind of kaolin that is used for catalytic cracking catalyst, this kind of kaolin is prepared according to the characteristics of existing Maoming kaolin mine, can solve the high viscosity of kaolin existing in the prior art, fluidity, Insufficient gel wear resistance

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, and initially separate the clay and impurities to obtain the kaolin base material, mix the base material with a dispersant accounting for 0.75% of the base material: sodium hexametaphosphate solution and sodium silicate The solution (mixing ratio 1:2.5) is mixed for pulping, and the conventional process is used for secondary sand removal to obtain the primary raw material of kaolin slurry with a concentration of 22%;

[0019] (2) Transport the primary kaolin slurry to the slurry storage tank, adjust the concentration of the primary kaolin slurry to 12%, and add a sodium hypochlorite solution with a concentration of 20% and 0.5% of the mass of the primary kaolin slurry to the primary kaolin slurry for reaction 5min, while adding, stir at a speed of 150 rpm, then add sodium dithionite solution with an amount of 0.8% of the mass of the kaoli...

Embodiment 2

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

[0022] (1) Excavate the loosened kaolin mineral material, and initially separate the clay and impurities to obtain the kaolin base material, mix the base material with a dispersant accounting for 2.5% of the base material: sodium hexametaphosphate solution and sodium silicate The solution (mixing ratio 1:4) is mixed for pulping, and the conventional process is used for secondary sand removal to obtain the primary raw material of kaolin slurry with a concentration of 20%;

[0023] (2) Transport the primary kaolin slurry to the slurry storage tank, adjust the concentration of the primary kaolin slurry to 15%, and add hydrogen peroxide with a concentration of 40% and 0.4% of the mass of the primary kaolin slurry to the primary kaolin slurry for 5 minutes , while adding, stir at a speed of 100 rev / min and then add a sodium dithionite solution whose consumption is 0.9% of the kaolin slurry initial ma...

Embodiment 3

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

[0026] (1) Excavate the loosened kaolin mineral material, and initially separate the clay and impurities to obtain the kaolin base material, mix the base material with a dispersant accounting for 1.8% of the base material: sodium hexametaphosphate solution and sodium silicate The solution (mixing ratio 1:3) is mixed for pulping, and the conventional process is used for secondary sand removal to obtain the primary raw material of kaolin slurry with a concentration of 25%;

[0027] (2) Transport the primary kaolin slurry to the slurry storage tank, adjust the concentration of the primary kaolin slurry to 15%, add hydrogen peroxide with a concentration of 30% and 0.4% of the mass of the primary kaolin slurry to the primary kaolin slurry and react for 10 minutes , while adding, stir at a speed of 120 revs / min and then add a sodium dithionite solution in an amount of 0.8% of the kaolin slurry initial...

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Abstract

The invention discloses kaolin for preparing a heavy-oil catalytic cracking catalyst. Preparation comprises the steps: firstly, digging a Songhua kaolin mineral aggregate, and initially separating out clay and impurities, to obtain a kaolin base material, mixing the base material and a dispersant, slurrying, then removing sand, and thus obtaining a kaolin mineral slurry initial material; transporting the kaolin mineral slurry initial material to a slurry storage tank, stirring, adding an oxidant and a sodium hyposulfite solution, and carrying out chemical bleaching, to obtain a kaolin mineral slurry concentrate; washing the kaolin mineral slurry concentrate obtained through chemical bleaching, carrying out press filtration and dewatering, and thus obtaining a filter cake; and after the filter cake is dried, crushing, and thus obtaining the finished product. The kaolin has good dispersibility and stability, can meet requirements of a catalytic cracking device on catalyst physicochemical properties, and has lower production cost; and in a gelation process, the colloid gelation time is short, the product wear index is low, and the finally-obtained catalyst has better heavy oil conversion ability and heavy metal pollution resistant ability.

Description

technical field [0001] The invention relates to a kind of kaolin, in particular to a kind of kaolin used for preparing heavy oil catalytic cracking catalyst. Background technique [0002] Kaolin is one of the raw materials used in the petrochemical industry to prepare catalysts for catalytic cracking of heavy oil. Kaolin is a kind of clay and clay rock mainly composed of kaolinite clay minerals. Its mineral composition is mainly composed of kaolinite, halloysite, hydromica, illite, montmorillonite, quartz, feldspar and other minerals. Pure kaolin is white and delicate, soft and soft, and has good physical and chemical properties such as plasticity and fire resistance. There are five major kaolin mines in my country: (1) Maoming kaolin (2) Longyan kaolin (3) Suzhou Yangshan kaolin (4) Hepu kaolin (5) North coal-measure kaolin. [0003] The chemical composition of Suzhou kaolin is very close to the theoretical composition of kaolinite, Al 2 o 3 The content can be as high a...

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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