Red carbon black for silicone rubber intermediate and processing technology thereof
阅读说明：本技术 一种用于硅橡胶中间体的红炭黑及其加工工艺 (Red carbon black for silicone rubber intermediate and processing technology thereof ) 是由 苏阳 苏国明 仇汉成 曹秀华 于 2021-09-14 设计创作，主要内容包括：本发明公开了一种用于硅橡胶中间体的红炭黑及其加工工艺,该用于硅橡胶中间体的红炭黑由以下比重的原料配制而成：粉煤灰1-3份、纯碱50-150份作为主要原料,以硫酸浓度为5～20%作为辅料,本发明通过取定量粉煤灰粉碎,将粉碎的粉煤灰与纯碱混合均匀,经高温冶融、水萃浸溶、过滤去杂质、浓缩滤液得到硅酸钠,先将硅酸钠配成水玻璃溶液,然后在硫酸中酸浸,均匀搅拌,调节PH值,将搅拌混合后的红炭黑传输到带有粉碎结构的烘干机中加热烘干粉碎,将烘干后的红碳黑粉碎得到红碳黑粉末,从而便于得到红碳黑粉末,使得得到的红碳黑粉末为活性,纯度高,增加用于硅橡胶中间体的红炭黑制备工艺的实用性,增加红碳黑的制备效率。(The invention discloses a red carbon black for a silicone rubber intermediate and a processing technology thereof, wherein the red carbon black for the silicone rubber intermediate is prepared from the following raw materials in parts by weight: the method comprises the following steps of taking a certain amount of pulverized fuel ash to be smashed, uniformly mixing the smashed pulverized fuel ash and the soda ash, carrying out high-temperature smelting, water extraction and leaching, filtering to remove impurities, concentrating filtrate to obtain sodium silicate, preparing the sodium silicate into a water glass solution, carrying out acid leaching in sulfuric acid, uniformly stirring, adjusting the pH value, conveying the red carbon black after stirring and mixing into a dryer with a smashing structure, heating, drying, smashing the dried red carbon black to obtain red carbon black powder, and further facilitating obtaining of the red carbon black powder.)
1. A red carbon black for silicone rubber intermediate and its processing technology, characterized by that: the red carbon black for the silicone rubber intermediate is prepared from the following raw materials in parts by weight: 1-3 parts of fly ash and 50-150 parts of soda ash are used as main raw materials, and 5-20% of sulfuric acid is used as an auxiliary material.
2. The red carbon black for silicone rubber intermediate and the process for producing the same as claimed in claim 1, wherein the red carbon black for silicone rubber intermediate has a formula ratio of 1:
。
3. The red carbon black for silicone rubber intermediate and the process for producing the same as claimed in claim 1, wherein the formula ratio 2 of the red carbon black for silicone rubber intermediate is:
。
4. The red carbon black for silicone rubber intermediate and the process for producing the same as claimed in claim 1, wherein the formula ratio of the red carbon black for silicone rubber intermediate 3 is:
。
5. The red carbon black for silicone rubber intermediate and the process for producing the same according to claim 1, wherein: the specific process steps are as follows:
firstly, screening and cleaning quantitative fly ash, and then crushing the fly ash to a particle size of less than 120 meshes;
step two, uniformly mixing the pulverized coal ash and soda ash according to the weight ratio of 1:50, smelting and dissolving at the high temperature of 1400-1500 ℃ for 1 hour, extracting and leaching with water at the temperature of more than 100 ℃ for 4-5 hours, filtering to remove impurities, and concentrating the filtrate to 45-46 Baume degrees to obtain sodium silicate;
step three, firstly preparing sodium silicate into a water glass solution with the modulus of 2.4-3.6 and the content of SiO2 of 4-10%, then carrying out acid leaching in 5-20% sulfuric acid at the temperature of 28-32 ℃ for 8-16 hours, then heating to 80 ℃, uniformly stirring, adjusting the pH value to 5-7, curing for 20 minutes, and then carrying out filtration washing, drying and sorting to obtain white carbon black;
step four, mixing the obtained white carbon black with white carbon black: red edible pigment: the ratio of water is 2:0.1:1, physical stirring is carried out, the red carbon black after stirring and mixing is transmitted to a drying machine with a crushing structure, heating is carried out until the temperature reaches 100 ℃, drying and crushing are carried out, and the dried red carbon black is crushed to 50-60 meshes to obtain red carbon black powder.
6. The red carbon black for the silicone rubber intermediate and the processing technology thereof as claimed in claim 1, wherein the white carbon black processed from fly ash is active and has high purity.
7. The red carbon black for the silicone rubber intermediate and the processing technology thereof as claimed in claim 1, wherein the colors of the red carbon black obtained by mixing the white carbon black and the red food pigment in different proportions are different.
8. The red carbon black for the silicone rubber intermediate and the processing technology thereof as claimed in claim 1, wherein the white carbon black has super adhesion, tear resistance, heat resistance and aging resistance.
9. The red carbon black for silicone rubber intermediate and the process for preparing the same as claimed in claim 1, wherein the reinforcement of the silicone rubber is mainly various types of red carbon black, which can increase the strength of vulcanized rubber by tens of times.
10. The red carbon black for silicone rubber intermediate and process for producing the same as claimed in claim 1, wherein said silicone rubber is a rubber having a main chain composed of silicon and oxygen atoms alternately, the silicon atoms usually having two organic groups attached thereto, and said silicone rubber has good gas permeability and high oxygen permeability.
Technical Field
The invention relates to the field of red carbon black for silicone rubber intermediates, in particular to red carbon black for silicone rubber intermediates and a processing technology thereof.
Background
Silicone rubber refers to rubber having a backbone composed of alternating silicon and oxygen atoms, with the silicon atoms typically having two organic groups attached to them. Conventional silicone rubbers consist predominantly of siloxane segments containing methyl groups and small amounts of vinyl groups. The introduction of phenyl can improve the high-temperature resistance and the low-temperature resistance of the silicone rubber, the introduction of trifluoropropyl and cyano can improve the temperature resistance and the oil resistance of the silicone rubber, and the silicone rubber has good low-temperature resistance and can still work at the temperature of-55 ℃; the red carbon black is used as a silicone rubber intermediate, and is also suitable for the fields of paint, tires, soles, feed additives and the like.
In the prior art, the traditional method for preparing the red carbon black uses sodium silicate, silicon tetrachloride and ethyl orthosilicate as silicon sources, the cost is high except for sodium silicate, and the traditional preparation method is a gas phase method and a precipitation method, so that the prepared red carbon black has low purity, and the preparation efficiency of the red carbon black is reduced, so that the red carbon black for the silicon rubber intermediate and the processing technology thereof are needed.
Disclosure of Invention
The invention aims to provide red carbon black for a silicone rubber intermediate and a processing technology thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the red carbon black for the silicone rubber intermediate is prepared from the following raw materials in parts by weight: 1-3 parts of fly ash and 50-150 parts of soda ash are used as main raw materials, and 5-20% of sulfuric acid is used as an auxiliary material.
Preferably, the formula ratio 1 of the red carbon black for the silicone rubber intermediate is as follows:
main raw materials
Parts by weight (kg)
Fly ash
1
Soda ash
50
Auxiliary materials
Concentration%
Sulfuric acid
5
Preferably, the formula ratio 2 of the red carbon black for the silicone rubber intermediate is as follows:
main raw materials
Parts by weight (kg)
Fly ash
2
Soda ash
100
Auxiliary materials
Concentration%
Sulfuric acid
10
Preferably, the formula ratio 3 of the red carbon black for the silicone rubber intermediate is as follows:
main raw materials
Parts by weight (kg)
Fly ash
3
Soda ash
150
Auxiliary materials
Concentration%
Sulfuric acid
20
Preferably, the red carbon black for the silicone rubber intermediate comprises the following specific process steps:
firstly, screening and cleaning quantitative fly ash, and then crushing the fly ash to a particle size of less than 120 meshes;
step two, uniformly mixing the pulverized coal ash and soda ash according to the weight ratio of 1:50, smelting and dissolving at the high temperature of 1400-1500 ℃ for 1 hour, extracting and leaching with water at the temperature of more than 100 ℃ for 4-5 hours, filtering to remove impurities, and concentrating the filtrate to 45-46 Baume degrees to obtain sodium silicate;
step three, firstly preparing sodium silicate into a water glass solution with the modulus of 2.4-3.6 and the content of SiO2 of 4-10%, then carrying out acid leaching in 5-20% sulfuric acid at the temperature of 28-32 ℃ for 8-16 hours, then heating to 80 ℃, uniformly stirring, adjusting the pH value to 5-7, curing for 20 minutes, and then carrying out filtration washing, drying and sorting to obtain white carbon black;
step four, mixing the obtained white carbon black with white carbon black: red edible pigment: the ratio of water is 2:0.1:1, physical stirring is carried out, the red carbon black after stirring and mixing is transmitted to a drying machine with a crushing structure, heating is carried out until the temperature reaches 100 ℃, drying and crushing are carried out, and the dried red carbon black is crushed to 50-60 meshes to obtain red carbon black powder.
Preferably, the white carbon black prepared by processing the fly ash is active and has high purity.
Preferably, the color shades of the red carbon black obtained by mixing the white carbon black and the red edible pigment in different proportions are different.
Preferably, the white carbon black has super strong adhesion, tear resistance, heat resistance and ageing resistance.
Preferably, the reinforcement of the silicone rubber is mainly various types of red carbon black, and the strength of the vulcanized rubber can be increased by tens of times.
Preferably, the silicone rubber is a rubber whose main chain is composed of silicon and oxygen atoms alternately, and two organic groups are usually bonded to the silicon atoms, and has good air permeability and high oxygen permeability.
The invention has the technical effects and advantages that:
(1) crushing a certain amount of fly ash, uniformly mixing the crushed fly ash and soda ash, smelting at a high temperature, leaching with water, filtering to remove impurities, concentrating filtrate to obtain sodium silicate, preparing the sodium silicate into a water glass solution, then leaching in sulfuric acid, heating, uniformly stirring, adjusting the pH value, curing, filtering, washing, drying and sorting to obtain white carbon black, physically stirring the obtained white carbon black, red edible pigment and water, transmitting the red carbon black after stirring and mixing to a dryer with a crushing structure, heating, drying, crushing the dried red carbon black to obtain red carbon black powder, and further facilitating the obtaining of the red carbon black powder, so that the obtained red carbon black powder is active and high in purity, the practicability of the preparation process of the red carbon black for the silicone rubber intermediate is improved, and the preparation efficiency of the red carbon black is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a red carbon black for a silicone rubber intermediate and a processing technology thereof, wherein the red carbon black for the silicone rubber intermediate is prepared from the following raw materials in parts by weight: 1-3 parts of fly ash and 50-150 parts of soda ash are used as main raw materials, and 5-20% of sulfuric acid is used as an auxiliary material.
Example one, a red carbon black for silicone rubber intermediate, the formulation ratio of which 1 is:
main raw materials
Parts by weight (kg)
Fly ash
1
Soda ash
50
Auxiliary materials
Concentration%
Sulfuric acid
5
Example two, a red carbon black for silicone rubber intermediate, the formulation ratio 2 of the red carbon black for silicone rubber intermediate is:
main raw materials
Parts by weight (kg)
Fly ash
2
Soda ash
100
Auxiliary materials
Concentration%
Sulfuric acid
10
Example three, a red carbon black for silicone rubber intermediate, the formulation ratio 3 of which is:
main raw materials
Parts by weight (kg)
Fly ash
3
Soda ash
150
Auxiliary materials
Concentration%
Sulfuric acid
20
A processing technology of red carbon black for a silicone rubber intermediate comprises the following specific processing steps:
firstly, screening and cleaning quantitative fly ash, and then crushing the fly ash to a particle size of less than 120 meshes;
step two, uniformly mixing the pulverized coal ash and soda ash according to the weight ratio of 1:50, smelting and dissolving at the high temperature of 1400-1500 ℃ for 1 hour, extracting and leaching with water at the temperature of more than 100 ℃ for 4-5 hours, filtering to remove impurities, and concentrating the filtrate to 45-46 Baume degrees to obtain sodium silicate;
step three, firstly preparing sodium silicate into a water glass solution with the modulus of 2.4-3.6 and the content of SiO2 of 4-10%, then carrying out acid leaching in 5-20% sulfuric acid at the temperature of 28-32 ℃ for 8-16 hours, then heating to 80 ℃, uniformly stirring, adjusting the pH value to 5-7, curing for 20 minutes, and then carrying out filtration washing, drying and sorting to obtain white carbon black;
step four, mixing the obtained white carbon black with white carbon black: red edible pigment: the ratio of water is 2:0.1:1, physical stirring is carried out, the red carbon black after stirring and mixing is transmitted to a drying machine with a crushing structure, heating is carried out until the temperature reaches 100 ℃, drying and crushing are carried out, and the dried red carbon black is crushed to 50-60 meshes to obtain red carbon black powder.
The white carbon black prepared by processing fly ash is used as the active material, and the purity is high.
The color shades of the red carbon black obtained by different proportions of the white carbon black and the red edible pigment are different.
The white carbon black has super strong adhesive force, tear resistance, heat resistance and ageing resistance.
The reinforcing of silicon rubber is mainly various types of red carbon black, and the strength of vulcanized rubber can be increased by tens of times.
The silicon rubber is rubber with a main chain formed by silicon and oxygen atoms alternately, the silicon atoms are usually connected with two organic groups, and the silicon rubber has good air permeability and high oxygen transmission rate.
The working principle of the invention is as follows: taking a certain amount of fly ash, screening and cleaning the fly ash, crushing the fly ash to a particle size of less than 120 meshes, uniformly mixing the crushed fly ash and soda ash according to a weight ratio of 1:50, smelting the mixture at a high temperature of 1400-1500 ℃ for 1 hour, extracting and leaching the mixture for 4-5 hours at a temperature of more than 100 ℃, filtering and removing impurities, concentrating the filtrate to a Baume degree of 45-46 to obtain sodium silicate, preparing the sodium silicate into a water glass solution with a modulus of 2.4-3.6 and a SiO2 content of 4-10%, then performing acid leaching in 5-20% sulfuric acid at a temperature of 28-32 ℃ for 8-16 hours, heating the solution to 80 ℃, uniformly stirring the solution, adjusting the pH value to 5-7, curing the solution for 20 minutes, and performing filtration, washing, drying and sorting to obtain white carbon black, wherein the obtained white carbon black is white carbon black: red edible pigment: the ratio of water is 2:0.1:1, physical stirring is carried out, the red carbon black after stirring and mixing is transmitted to a dryer with a crushing structure, the dryer is heated to 100 ℃ for drying and crushing, the dried red carbon black is crushed to 50-60 meshes to obtain red carbon black powder, so that the red carbon black powder is convenient to obtain, the obtained red carbon black powder is active and high in purity, the practicability of the red carbon black preparation process for the silicone rubber intermediate is improved, and the preparation efficiency of the red carbon black is improved.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "secured" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integral to; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The standard parts used by the invention can be purchased from the market, and the special-shaped parts can be customized according to the description of the specification.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.