Method for preparing gasoline vehicle particle catcher by using fumed silica

A fumed silica and particle trap technology, applied in applications, household appliances, clay products, etc., can solve problems such as low pass rate, improve production efficiency, meet user needs, and achieve significant pore-making effects.

Inactive Publication Date: 2019-04-19
CHONGQING AOFU FINE CERAMICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above-mentioned technical problems, the present invention provides a honeycomb ceramic base material for automobile exhaust purification, especially relates to a cordierite gasoline particle trap product for purification of particulate matter in gasoline vehicle exhaust, which solves the problems of high pressure drop, The problem of high thermal expansion coefficient, and at the same time solve the problem of low pass rate in the process of preparing the trap, which significantly reduces the production cost and improves the production efficiency

Method used

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  • Method for preparing gasoline vehicle particle catcher by using fumed silica
  • Method for preparing gasoline vehicle particle catcher by using fumed silica
  • Method for preparing gasoline vehicle particle catcher by using fumed silica

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] (1) Dry mixing of inorganic components: 40.35% by weight of talc, 7% by weight of kaolin a, 7% by weight of kaolin b, 15.43% by weight of alumina, 16% by weight of hydrated alumina, 7.11% by weight of Fumed silica, the silica of 7.11% by weight; (the inorganic components in the following examples are all the same, if no special instructions)

[0079] Dry mixing: the weighed solid powder is placed in a weightless mixer and mixed for a fixed time, and various raw materials are evenly mixed; (the following examples and comparative examples are the same)

[0080] Then add the graphite of 14% by weight, the starch of 25% by weight, the binder methyl cellulose of 8% by weight, obtain the homogeneous mixture with tight packing, wherein the addition of graphite, starch is all on the basis of inorganic component Add on top, the amount of binder added is added on the basis of the total mixed components;

[0081] The binder is mainly a water-soluble polymer material, which plays ...

Embodiment 2

[0089] (1) Adopt dry method to mix inorganic components: 40.35% by weight of talc, 7% by weight of kaolin a, 7% by weight of kaolin b, 15.43% by weight of alumina, 16% by weight of hydrated alumina, 14.22% by weight of Fumed silica;

[0090] Then add the graphite of 14% by weight, the starch of 25% by weight, the binder methyl cellulose of 8% by weight, obtain the homogeneous mixture with tight packing, wherein the addition of graphite, starch is all on the basis of inorganic component Add on top, the amount of binder added is added on the basis of the total mixed components;

[0091] (2) Put the mixed powder into a kneading machine and add 30% by weight of water of the total powder to knead for 7 minutes, add 1% by weight of additive stearic acid and knead for 10 minutes. added on a component basis;

[0092] (3) mud material kneaded in refining step (2) becomes mud section;

[0093] (4) Extrude the plastic mud section into a honeycomb structure, extrude with a skin, and th...

Embodiment 3

[0097] (1) Adopt dry method to mix the talc of 40.53% by weight, the kaolin a of 4% by weight, the kaolin b of 10% by weight, the alumina of 15.36% by weight, the hydrated alumina of 16% by weight, the fumed silica of 14.11% by weight ;

[0098] Then add the graphite of 14% by weight, the starch of 25% by weight, the binding agent of 8% by weight, obtain the homogeneous mixture with tight packing, wherein the addition of graphite, starch all adds on the basis of inorganic component, and bonding The additive amount of the agent is added on the basis of the total mixing components;

[0099] (2) Put the mixed powder into a kneading machine and add 30% by weight of the total powder to knead for 7 minutes, add 1% by weight of additives and knead for 10 minutes, and the amount of additives added is 1% of the total mixed components. add on top of;

[0100] (3) mud material kneaded in refining step (2) becomes mud section;

[0101] (4) Extrude the plastic mud section into a honeyco...

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Abstract

The invention relates to the technical field of exhaust pollutant post-treatment of gasoline vehicles, and particularly relates to a method for preparing a low-pressure drop and low-expansion coefficient cordierite gasoline vehicle exhaust particle catcher by using fumed silica. The method comprises the following steps: (1) mixing inorganic raw materials by a dry method, and adding a binder; (2) kneading; (3) practicing; (4) extruding, microwaving and drying; (5) cutting and sintering; (6) punching holes, blocking the holes and then putting the holes into a kiln for back burning. The fumed silica material is adopted as the raw material catcher, the pore-forming effect is remarkable, and the micro-pore connectivity is good, so that the pressure drop and the thermal expansion coefficient ofthe catcher can be reduced; meanwhile, the fumed silica can replace common silica, thereby not only achieving the function of serving as an inorganic component, but also achieving the pore-forming effect and reducing the adding amount of the organic pore-forming agent; the use of the fumed silica not only can meet the use requirements, but also reduces the production cost and improves the production efficiency.

Description

technical field [0001] The invention relates to the technical field of post-treatment of exhaust pollutants from gasoline vehicles, in particular to a method for preparing a low-pressure-drop, low-expansion coefficient cordierite gasoline vehicle exhaust particulate filter, and in particular to the preparation of low-pressure drop, Method for low expansion coefficient cordierite gasoline vehicle exhaust particulate filter. Background technique [0002] The increase in the number of cars has led to an increase in the number of particulate matter emissions, and the haze weather is becoming more and more serious. Gasoline Direct Injection (GDI) is being used more and more widely because of its good power performance, fuel economy, drivability and emission. Mass formation and emission of particulate matter. With the increasingly stringent environmental regulations, the gasoline engine particulate filter (GPF) is the most effective and reliable technical means to solve this pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B33/13C04B33/04
CPCC04B33/04C04B33/13C04B33/131C04B38/0006C04B2235/3217C04B2235/3418C04B38/0074
Inventor 程国园潘吉庆张兆合刘洪月黄妃慧王勇伟
Owner CHONGQING AOFU FINE CERAMICS CO LTD
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