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Motor vehicle tail gas purifying assistant and production method thereof

A technology for tail gas purification and production methods, which is applied in the directions of chemical instruments and methods, separation methods, catalyst activation/preparation, etc., and can solve problems such as failure to meet the coating operation time limit, unsatisfactory defoaming effect, and easy sedimentation of the slurry

Active Publication Date: 2009-09-30
江门市资迪科技环保有限公司
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

The existing method of adding surfactants often produces a large amount of foam during grinding, even if the antifoaming agent is added, the defoaming effect is not ideal and the grinding time is long
The prepared slurry is easy to settle and cannot meet the requirements of the coating operation time limit

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0014] An auxiliary agent for purifying motor vehicle exhaust, which is composed of stearic acid, stearic acid monoglyceride and nonylphenol polyoxyethylene ether, and the mass ratio of the three is 40.6:23.1:9.1. The auxiliary production method comprises the following specific production steps:

[0015] ①Put 40.6kg of stearic acid and 23.1kg of monoglyceride stearate into the reaction kettle and heat to 60°C-80°C;

[0016] ②Stir the above mixture at 60°C-80°C for 2h-3h to a transparent substance;

[0017] ③Add 9.1kg of nonylphenol polyoxyethylene ether into the reaction kettle, and stir the mixture at 60°C-80°C for 2h-4h;

[0018] ④Release while hot, and after natural cooling, pulverize the solid to form additives.

[0019] In addition, fatty acids, fatty acid glycerides, alcohol-based or phenol-based polyoxyethylene ethers used in the present invention are commonly used substances well known in the field. In this embodiment, in addition to stearic acid, related fatty acid...

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Abstract

The invention relates to an assistant used for producing a motor vehicle tail gas purifying converter, containing fatty acid, fatty acid glyceride, alcohol group or phenolic group polyethenoxy ether. The invention also relates to a production method of the assistant, which comprises the following steps: firstly, placing the fatty acid and the fatty acid glyceride into a reaction kettle to be heated to 60-80 DEG C; secondly, stirring the mixture for 2-3h at 60-80 DEG C until the mixture changes into transparency material; thirdly, adding the alcohol group or phenolic group polyethenoxy ether into the reaction kettle, stirring the mixture for 2-4h at 60-80 DEG C; fourthly, giving off the product of reaction before cooling, crushing solid after the product of reaction is naturally cooled so as to obtain the assistant. The invention shortens the milling time because assistant accounting for 8-20 percent of the weigh of the grout is added into the grout, can obtain the grout with uniform granularity, stable dispersion, no foam, and good levelability and easy loading. The invention has better comprehensive effect.

Description

Technical field: [0001] The invention relates to a motor vehicle tail gas purification additive and a production method thereof, belonging to the technical field of environmental protection catalytic purification. Background technique: [0002] At present, in the production process of the slurry coating of the motor vehicle exhaust purification converter, it is necessary to use γ-AL 2 o 3 , precious metal oxides and rare earth oxides are formulated into an aqueous solution of a certain concentration, and a dispersant (surfactant) is added for ball milling to make a slurry and then coated on a metal or ceramic carrier. The above-mentioned metal oxides are often used in nanometer or sub-nanometer size, and their strong surface energy in aqueous solution or air leads to stubborn particle agglomeration, which greatly affects the pulping process performance, such as dispersibility, flow lubricity, stability , viscosity and surface average particle size after coating, pore volum...

Claims

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Application Information

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IPC IPC(8): B01F17/00B01J37/00B01D53/94C09K23/00
Inventor 庞凯鹰
Owner 江门市资迪科技环保有限公司
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