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Catalytic degreasing system and catalytic degreasing method

A catalytic degreasing and catalyst technology, applied in the field of metal powder injection molding, can solve the problems of explosion of catalytic degreasing furnace, pollution of the environment, and potential safety hazards, and achieve the effect of expanding the scope of application

Active Publication Date: 2018-10-23
宁波斯百睿自控设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the catalytic degreasing of the product is carried out in the catalytic degreasing furnace, the catalyst used is a concentrated nitric acid solution with a concentration of more than 87%. However, there are some problems in the concentrated nitric acid solution as a catalyst. After the catalytic degreasing reaction is carried out, the concentrated nitric acid solution will produce nitrogen. Oxygen compounds will pollute the environment; during the catalytic degreasing reaction, a large amount of formaldehyde gas will be generated in the catalytic degreasing furnace, and the concentrated nitric acid solution will react with formaldehyde, which will cause the catalytic degreasing furnace to explode and pose a safety hazard; The catalytic degreasing furnace of the catalyst can only carry out catalytic degreasing of conventional stainless steel products and iron products, and the catalytic degreasing reaction cannot be carried out for concentrated nitric acid such as copper products, cobalt products, titanium products, etc., which reduces the application range of the catalytic degreasing furnace

Method used

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  • Catalytic degreasing system and catalytic degreasing method
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Experimental program
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Embodiment approach

[0054] According to one embodiment of the catalytic degreasing system of the present invention, the ratio of oxalic acid to water is: 0.5-1:1.5-2.

[0055] According to the catalytic degreasing system of the present invention, the ratio of oxalic acid and water is controlled at: the scope of 0.5-1:1.5-2 obtains the oxalic acid aqueous solution catalyst, and the oxalic acid aqueous solution catalyst that above-mentioned range obtains can be the catalysis carried out in catalytic degreasing reaction device 200 The degreasing reaction provides suitable acidic conditions, so that the catalytic degreasing reaction can be carried out better, and the efficiency of the catalytic degreasing furnace 201 can be improved.

[0056] According to an embodiment of the catalytic degreasing system of the present invention, the catalytic blending device includes:

[0057] Catalyst adjuster, the catalyst adjuster is used to hold the mixed solution of oxalic acid and water, mix oxalic acid and wat...

Embodiment 1

[0092] Embodiment 1 is the embodiment of catalytic degreasing system of the present invention;

[0093] Example 1

[0094] According to the catalytic degreasing system of the present invention, the system includes: a catalyst blending device 100, a delivery pipeline 300 and a catalytic degreasing reaction device 200;

[0095] Add oxalic acid and water with a ratio of 1:2 to the metering bottle 101, and add the magnetic stirrer 103 to the metering bottle 101 at the same time, place the above-mentioned metering bottle 101 on the magnetic stirring heater 102, the mixing of oxalic acid and water The liquid is stirred and heated, and the oxalic acid aqueous solution catalyst is reconciled. When the temperature detected by the thermocouple 104 is 80 degrees Celsius, the metering pump 304 is turned on, and the oxalic acid aqueous solution catalyst enters the metering pump 304 through the first sub-transport pipeline 301, and the metering pump 304 passes the oxalic acid aqueous soluti...

Embodiment 2

[0096] Embodiment 2 is the embodiment of catalytic degreasing method of the present invention;

[0097] Example 2

[0098] According to the catalytic degreasing method of the present invention, the method comprises: catalyst reconciliation step S1 and catalytic degreasing reaction step S2;

[0099] Add oxalic acid and water with a ratio of 1:2 into the metering bottle 101 of the catalyst reconciliation step S1, and at the same time add the magnetic stirrer 103 to the metering bottle 101, place the metering bottle 101 on the magnetic stirring heater 102, Stir and heat the mixed solution of oxalic acid and water, reconcile the oxalic acid aqueous solution catalyst, when the temperature detected by the thermocouple 104 is 80 degrees Celsius, turn on the metering pump 304, and the oxalic acid aqueous solution catalyst enters the metering pump 304 through the first sub-transport pipeline 301, and measures The pump 304 enters the oxalic acid aqueous solution through the second sub-...

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Abstract

The invention discloses a catalytic debinding system and a catalytic debinding method and relates to the technical field of metal powder injection moulding. The catalytic debinding system comprises a catalyst blending device, a catalytic debinding reaction device and a delivery pipeline, wherein the catalyst blending device prepares oxalic acid and water into an oxalic acid water solution catalyst in proportion, the inlet of the catalytic debinding reaction device is communicated with the catalyst blending device and is used for conducting catalytic debinding reaction on the oxalic acid water solution catalyst, the delivery pipeline is arranged between the catalyst blending device and the catalytic debinding reaction device and is used for delivering the oxalic acid water solution catalyst from the catalyst blending device to the catalytic debinding reaction device. By the adoption of the catalytic debinding system and the catalytic debinding method, environmental pollution and potential safety hazard are avoided, and the application range of a catalytic debinding furnace is widened.

Description

technical field [0001] The invention relates to the technical field of metal powder injection molding, in particular to a catalytic degreasing system and a catalytic degreasing method. Background technique [0002] Metal powder injection molding technology (MIM technology) is a new technology combining the traditional powder metallurgy technology and thermoplastic engineering plastic injection molding technology. It integrates the advantages of these two technologies into one. The basic operation process of this process is to mix metal powder and binder together to prepare feed, then put the feed into the injection molding machine, inject the mold into a green body of a certain shape, and then bond most of the green body The agent is degreased and removed, and then the process of high-temperature sintering is carried out. In this process, the catalytic degreasing of the green body is generally carried out in a catalytic degreasing furnace, and concentrated nitric acid is of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/22B22F3/10
CPCB22F3/003B22F3/1025B22F3/225
Inventor 屠文闻
Owner 宁波斯百睿自控设备有限公司