Preparation method of easy-to-disperse pigment carbon black

Abstract

The invention relates to a preparation method of easy-to-disperse pigment carbon black, which comprises the following steps: step S1, cracking a petroleum-based composite raw material by adopting an oil furnace incomplete combustion method; s2, sequentially adding an organic potassium carboxylate structure regulator alcohol solution and a polysaccharide modifier aqueous solution in the cracking process of the petroleum-based composite raw material to generate a carbon black aggregate; and S3, carrying out fine treatment on the carbon black aggregate to generate the carbon black. In order to overcome the defects that the pigment carbon black produced in the prior art is lack of polar groups on the surface and is difficult to disperse in practical application, the invention provides the preparation method of the pigment carbon black, which does not need a post-treatment process and has a good dispersion effect.

Description

Technical Field

[0001] The present invention relates to the technical field of special carbon materials, and particularly to a preparation method of easily dispersible pigment carbon black. Background Art

[0002] Carbon black is a product obtained by incomplete combustion or pyrolysis of organic substances (solid, liquid, and gaseous hydrocarbons) under oxygen-deficient conditions. It is mainly composed of carbon elements, and its microcrystals have a quasi-graphite structure with a concentric orientation. Its shape is nearly spherical nanoparticles, and most of the nanoparticles are fused into aggregates with a branched structure at high temperatures.

[0003] The production processes of carbon black include furnace method, spray method, lampblack method, channel method, thermal cracking method, and acetylene method, etc. Among them, the formation of carbon black is divided into two forms, namely incomplete combustion and thermal decomposition method. Among them, the furnace method, spray method, lampblack method, and channel method are incomplete combustion methods, and the thermal cracking method and acetylene method are thermal cracking methods. Each carbon black produced by the carbon black process has its own characteristics and is applied in different professional fields.

[0004] Using gaseous hydrocarbons, liquid hydrocarbons, or a mixture of gaseous and liquid hydrocarbons as raw materials, supplying an appropriate amount of air, burning and cracking at high temperature in a reaction furnace, and the generated carbon black is suspended in the flue gas and cooled and collected. This method of producing carbon black is called the furnace method. Furnace carbon black is formed by cracking liquid mineral hydrocarbons with the heat generated by fuel combustion in the reaction furnace. Carbon black produced only using liquid hydrocarbon raw materials, such as oils in the coal tar system or petroleum system, is called the oil furnace method. Carbon black produced using gaseous hydrocarbons as fuel and liquid hydrocarbons as raw materials is also called the oil furnace method. In the prior art, most enterprises use the oil furnace method to prepare carbon black.

[0005] The oil furnace method can adjust the size and degree of fusion and aggregation of carbon black particles according to different application requirements to form different types of products. Oil furnace carbon black is the largest in output and the most diverse in variety in the carbon black industry. Oil furnace carbon black is mainly used as pigment carbon black and a reinforcing agent for various rubbers and tires. However, the cracking raw material of oil furnace carbon black is liquid mineral hydrocarbons, and the cracking process is an endothermic reaction with a relatively low furnace temperature, usually controlled at 1400 - 1900 °C, resulting in a relatively wide particle size distribution of furnace carbon black, a lack of oxygen atoms on the carbon black surface, and a high carbon atom concentration, showing a strong aggregation effect and being difficult to disperse. In order to improve the dispersibility and stability of carbon black, the main methods include oxidation modification, dispersant-assisted dispersion, etc. The essence is to introduce or adsorb polar groups on the non-polar carbon black surface, so that there is sufficient electrostatic repulsion and / or steric resistance between carbon black particles to prevent aggregation and promote the dispersion and stability of carbon black. However, the oxidation modification and dispersant-assisted modification methods with significantly improved carbon black dispersion effects require additional post-treatment steps and a longer process. Therefore, how to directly prepare pigment carbon black products with good dispersion performance on the carbon black production device is a difficult problem we need to study and solve. Summary of the Invention

[0006] The object of the present invention is to overcome the disadvantages and deficiencies of the pigment carbon black produced by the prior art, which has a lack of polar groups on the surface and is difficult to disperse in practical applications, and to propose a preparation method of pigment carbon black that does not require a post-treatment process and has good dispersion effect.

[0007] To achieve the above object, the present invention provides a preparation method of easily dispersible pigment carbon black, the method comprising: Step S1, pyrolyzing a petroleum-based composite raw material by an oil furnace incomplete combustion method; Step S2, sequentially adding an organic carboxylate potassium structural regulator alcohol solution and a polysaccharide modifier aqueous solution during the pyrolysis of the petroleum-based composite raw material to generate carbon black aggregates; Step S3, finely treating the carbon black aggregates to generate carbon black.

[0008] Preferably, in the step S1, the petroleum-based composite raw material is a compound of ethylene tar and catalytic oil slurry in a ratio of 9:1.

[0009] Preferably, in the step S2, the solute of the organic carboxylate potassium structural regulator alcohol solution is any one or a mixture of two or more of potassium citrate, potassium sorbate, and potassium ricinoleate; the solvent of the organic carboxylate potassium structural regulator alcohol solution is any one of ethanol and methanol.

[0010] Preferably, the concentration of the alcohol solution is 1% - 40%, and it is 1% - 30% of the mass of the petroleum-based composite raw material.

[0011] Preferably, the organic carboxylate potassium structural regulator alcohol solution reacts in an atomized state, and the reaction pressure is 0.5 - 4.0 MPa; the polysaccharide modifier aqueous solution reacts in an atomized state, and the reaction pressure is 0.5 - 4.0 MPa.

[0012] Preferably, in the step S2, the concentration of the polysaccharide modifier aqueous solution is 10% - 40%, and the dosage of the polysaccharide modifier aqueous solution is 1% - 30% of the mass of the petroleum-based composite raw material.

[0013] Preferably, the solute of the polysaccharide modifier aqueous solution is maltodextrin.

[0014] Preferably, the step S3 includes: Step S31, the carbon black aggregates are rapidly cooled and then sent to an air preheater and an oil preheater for further cooling; Step S32, sent to a bag filter, and the separated carbon black is sent to a granulator for granulation; Step S33, dried in a dryer to obtain carbon black.

[0015] Preferably, the reaction temperature during the pyrolysis process is 1500 - 2500 °C.

[0016] A preparation method of a polyethylene carbon black masterbatch, wherein the method uses the carbon black generated by the aforementioned preparation method of an easily dispersible pigment carbon black; the method includes: Step Q1, mixing polyethylene, pentaerythritol ester, phosphite, silane coupling agent and carbon black according to a mass fraction of 60:0.1:0.3:0.7:39; Step Q2, melt-extruding the mixture at 190 °C; Step Q3, cooling and pelletizing the extruded product, and mixing and blending according to a mass fraction of 6:94 of the extruded product and polyethylene resin to obtain a polyethylene carbon black masterbatch.

[0017] In summary, compared with the prior art, a preparation method of an easily dispersible pigment carbon black provided by the present invention has the following beneficial effects:

[0018] First, the production method has strong operability and a simple process.

[0019] Second, carbon black currently used in plastic products usually requires small particle size and low structure of pigment carbon black, that is, small particle size pigment carbon black meets the blackness requirements of products and provides higher coloring ability; while low-structure pigment carbon black can provide higher optical properties for plastic products, such as higher gloss and blue-phase appearance. However, carbon black with small particle size and low structure is the most difficult to disperse, and to a certain extent, the performance of carbon black needs to be balanced. Using the preparation method in the present invention, an organic structure regulator alcohol solution is added to the reaction zone, and the solute is a salt containing a low carbon number. Compared with conventional structure regulators, such as potassium carbonate, potassium chloride, etc., the structure regulator in the present invention has good compatibility with petroleum-based carbon black raw materials, and can more effectively regulate the particle size and particle size distribution range of the generated pigment carbon black, and can obtain a pigment carbon black product with smaller particle size, narrower distribution and medium-low structure.

[0020] Third, the solvent used for the organic structure regulator in the present invention is alcohol, and the oxygen-containing functional groups and oxygen-containing free radicals released by the hydrolysis of the maltodextrin aqueous solution react with the surface of the generated pigment carbon black particles to generate pigment carbon black with a variety of oxygen-containing groups, improving the polarity and dispersion performance of the pigment carbon black. Description of the Drawings

[0021] Figure 1 The iodine absorption value and oil absorption value of the carbon black prepared by different preparation parameters in Examples 1-3 and Comparative Examples 1-3 of the present invention.

[0022] Figure 2 The parameter diagram of the performance of the polyethylene composite materials in Examples 4-6 and Comparative Examples 4-6 of the present invention.

[0023] Figure 3 The iodine absorption value and oil absorption value of the carbon black prepared by different preparation parameters in Examples 7-10 of the present invention.

[0024] Figure 4This is the flowchart of the present invention. Detailed implementation manners

[0025] The following will combine with the accompanying drawings in the embodiments of the present invention Figure 1 to detail the technical solutions, structural features, achieved purposes and effects in the embodiments of the present invention.

[0026] It should be noted that the accompanying drawings adopt a very simplified form and all use non-precise scales, only for conveniently and clearly assisting in explaining the purpose of the implementation manners of the present invention, and are not used to limit the limiting conditions for implementing the present invention. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed by the present invention.

[0027] It should be noted that in the present invention, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements clearly listed, but also includes other elements not clearly listed, or also includes elements inherent to such process, method, article or device.

[0028] A preparation method of easily dispersible pigment carbon black provided by the present invention. The basic principle of the method is in the carbon black growth stage after the pyrolysis and nucleation of the petroleum-based composite raw material; an alcohol solution of an organic carboxylate structure regulator and an aqueous solution of a polysaccharide modifier are successively introduced into the petroleum-based composite raw material; the organic carboxylate has good compatibility with the petroleum-based composite raw material, can further reduce the carbon black particle size and distribution range. Through the high-temperature pyrolysis of the alcohol and polysaccharide modifier rich in oxygen elements, various oxygen-containing functional groups grow on the surface of the petroleum-based pigment carbon black of the petroleum-based composite raw material, improving the surface polarity of the pigment carbon black, improving its compatibility with polar solvents and increasing the electrostatic repulsion between pigment carbon black particles, thereby improving the dispersion and stability of the pigment carbon black in the application system.

[0029] As Figure 4 shown, specifically, the method includes:

[0030] Step S1, using the oil furnace incomplete combustion method to pyrolyze the petroleum-based composite raw material;

[0031] Step S2, successively adding an alcohol solution of an organic carboxylate structure regulator and an aqueous solution of a polysaccharide modifier during the pyrolysis of the petroleum-based composite raw material to generate carbon black aggregates;

[0032] Step S3: Pre-treat the carbon black aggregates to produce carbon black.

[0033] In a specific embodiment, in step S1, the petroleum-based composite raw material is a compound of petroleum-based raw materials such as ethylene tar and catalytic slurry oil; in a specific embodiment, the ratio of ethylene tar to catalytic slurry oil is 9:1.

[0034] In a specific embodiment, in step S2, the solute of the organic carboxylate potassium structure regulator alcohol solution is any one or a mixture of two or more of potassium citrate, potassium sorbate, and potassium ricinoleate; the solvent of the organic carboxylate potassium structure regulator alcohol solution is any one of ethanol and methanol. Preferably, the concentration of the alcohol solution is 1% - 40%, and the dosage is 1% - 30% of the mass of the petroleum-based composite raw material.

[0035] In a preferred embodiment, the organic carboxylate potassium structure regulator alcohol solution enters the reaction system in an atomized state (here, the reaction system refers to the place where the pyrolysis of the petroleum-based composite raw material occurs), and the pressure for entering the reaction system is 0.5 - 4.0 MPa. When the organic carboxylate potassium structure regulator alcohol solution enters the reaction system in an atomized state, the principle of increasing the surface area by atomization is mainly utilized. The atomized solution forms many tiny droplets, and compared with the overall inflow of the liquid state, the total surface area of these tiny droplets increases significantly.

[0036] In a specific embodiment, in step S2, the solute of the aqueous solution of the polysaccharide modifier is maltodextrin; preferably, the concentration of the aqueous solution of the polysaccharide modifier is 10% - 40%, and the dosage of the aqueous solution of the polysaccharide modifier is 1% - 30% of the mass of the petroleum-based composite raw material. Similarly, the aqueous solution of the polysaccharide modifier enters the reaction system in an atomized state, and the pressure for entering the reaction system is 0.5 - 4.0 MPa.

[0037] In a preferred embodiment, step S3 includes:

[0038] Step S31: After the carbon black aggregates are quenched, they are sent to the air preheater and oil preheater for further cooling;

[0039] Step S32: Send them into the bag filter, and the separated carbon black is sent to the granulator for granulation;

[0040] Step S33: Dry in the dryer to obtain carbon black.

[0041] In addition, during the entire reaction process, the reaction temperature during the pyrolysis process is 1500 - 2500 °C. To better enable the entire reaction to proceed, air inlets for the organic carboxylate potassium structure regulator alcohol solution and the aqueous solution of the polysaccharide modifier can be added in the middle of the reaction zone of the reaction system.

[0042] Specifically, when the petroleum-based composite raw material absorbs the aforementioned atomized substance, it pyrolyzes at high temperature in the combustion flame to form initial carbon particles. An alcohol solution of a gaseous organic carboxylate structure regulator and an aqueous solution of a polysaccharide modifier are introduced into the middle of the reaction zone of the aforementioned reaction system; the oxygen-rich alcohol solvent and maltodextrin (used in this embodiment) absorb the heat generated by the pyrolysis of the petroleum-based composite raw material and decompose and pyrolyze at high temperature, enabling the initial carbon particles of pigment carbon black to grow while forming various oxygen-containing functional groups on their surfaces. The pigment carbon black colloidal nanoparticles modified with oxygen-containing polar functional groups further collide in the rear part of the reaction zone of the reaction system and fuse into carbon black aggregates with different branched chain structures under the action of the structure regulator (the alcohol solution of the organic carboxylate structure regulator). The carbon black aggregates are rapidly cooled and then sent to an air preheater and an oil preheater for further temperature reduction, and then sent to a bag filter. The separated carbon black is sent to a granulator for granulation, then dried in a dryer, and finally enters the finished product packaging system after treatment and is packaged into the final product.

[0043] In addition, the present invention also proposes a method for preparing a polyethylene carbon black masterbatch, which uses the carbon black generated by the aforementioned method for preparing an easily dispersible pigment carbon black; the method includes:

[0044] Step Q1, mixing polyethylene, pentaerythritol ester, phosphite, silane coupling agent and carbon black according to a mass fraction of 60:0.1:0.3:0.7:39;

[0045] Among them, pentaerythritol ester and phosphite are free radical stabilizers. The function of free radical stabilizers is to break this free radical chain reaction. They capture free radicals by providing hydrogen atoms (such as hindered phenol stabilizers) or decomposing peroxides (such as phosphite stabilizers) and other methods, thereby terminating the free radical reaction.

[0046] Step Q2, melt-extruding the mixture at 190 °C;

[0047] Step Q3, cooling and pelletizing the extruded product, and mixing and blending according to a mass fraction of 6:94 of the extruded product and polyethylene resin to obtain a polyethylene carbon black masterbatch.

[0048] The following are specific examples. The reaction system uses a reaction furnace, the pressure entering the reaction furnace is 0.5 - 4.0 MPa, and the reaction temperature is 1500 - 2500 °C.

[0049] Example 1

[0050] Ethylene tar and catalytic slurry oil (9:1) are incompletely burned in a reaction furnace. A potassium citrate ethanol solution (concentration: 10%) accounting for 1% of the raw oil mass and a 10% maltodextrin aqueous solution (concentration: 10%) are added to the reaction furnace for carbon black production. The reaction temperature is 1850 °C, and the pressure entering the reaction furnace is 2.0 MPa.

[0051] Example 2

[0052] Ethylene tar and catalytic slurry oil (9:1) are incompletely burned in a reaction furnace. A potassium citrate ethanol solution (concentration: 10%) accounting for 2% of the raw oil mass and a 10% maltodextrin aqueous solution (concentration: 10%) are added to the reaction furnace for carbon black production. The reaction temperature is 1850 °C, and the pressure entering the reaction furnace is 2.0 MPa.

[0053] Example 3

[0054] Ethylene tar and catalytic slurry oil (9:1) are incompletely burned in a reaction furnace. A potassium citrate ethanol solution (concentration: 10%) accounting for 1% of the raw oil mass and a 20% maltodextrin aqueous solution (concentration: 10%) are added to the reaction furnace for carbon black production. The reaction temperature is 1850 °C, and the pressure entering the reaction furnace is 2.0 MPa.

[0055] Comparative Example 1

[0056] Ethylene tar and catalytic slurry oil (9:1) are incompletely burned in a reaction furnace. A potassium citrate ethanol solution (concentration: 10%) accounting for 1% of the raw oil mass is added to the reaction furnace for carbon black production. The reaction temperature is 1850 °C, and the pressure entering the reaction furnace is 2.0 MPa.

[0057] Comparative Example 2

[0058] Ethylene tar and catalytic slurry oil (9:1) are incompletely burned in a reaction furnace. A 10% maltodextrin aqueous solution (concentration: 10%) accounting for 10% of the raw oil mass is added to the reaction furnace for carbon black production. The reaction temperature is 1850 °C, and the pressure entering the reaction furnace is 2.0 MPa.

[0059] Comparative Example 3

[0060] Ethylene tar and catalytic slurry oil (9:1) are incompletely burned in a reaction furnace. A potassium carbonate aqueous solution (concentration: 10%) accounting for 1% of the raw oil mass is added to the reaction furnace for carbon black production. The reaction temperature is 1850 °C, and the pressure entering the reaction furnace is 2.0 MPa.

[0061] As Figure 1As shown in the figure, through the comparative analysis of Examples 1-3 and Comparative Examples 1-3, it can be found that, especially in comparison with Comparative Example 3, by using the method of the present invention, the iodine adsorption value of pigment carbon black can be significantly increased, that is, the prepared carbon black has a smaller particle size and a higher structure. The addition of maltodextrin aqueous solution can improve the structure, and the addition of potassium citrate ethanol solution can increase the iodine adsorption value of carbon black, effectively regulating the oil absorption value range of the obtained carbon black.

[0062] The following introduces the preparation examples of polyethylene carbon black masterbatch.

[0063] Example 4

[0064] By mass, 60 parts of polyethylene, 0.1 part of 1010 (free radical stabilizer), 0.2 part of 168 (free radical stabilizer), 0.7 part of silane coupling agent, and 39 parts of the carbon black prepared in Example 1 were mixed. Subsequently, the mixture was added to a twin-screw extruder for melt extrusion. The extrusion temperature was 190 °C, and the extruded product was cooled and pelletized to obtain carbon black masterbatch 1. Carbon black masterbatch 1 (mass fraction 6%) was dispersed in polyethylene resin (mass fraction 94%) again, and the dispersion degree of carbon black was determined according to GB / T18251-2019 "Determination of the Dispersion Degree of Pigments or Carbon Black in Pipes, Fittings and Compounds".

[0065] Example 5

[0066] By mass, 60 parts of polyethylene, 0.1 part of 1010 (free radical stabilizer), 0.2 part of 168 (free radical stabilizer), 0.7 part of silane coupling agent, and 39 parts of the carbon black prepared in Example 2 were mixed. Subsequently, the mixture was added to a twin-screw extruder for melting. The extrusion temperature was 190 °C, and the extruded product was cooled and pelletized to obtain carbon black masterbatch 2. Carbon black masterbatch 2 (mass fraction 6%) was dispersed in polyethylene resin (mass fraction 94%) again, and the dispersion degree of carbon black was determined according to GB / T18251-2019 "Determination of the Dispersion Degree of Pigments or Carbon Black in Pipes, Fittings and Compounds".

[0067] Example 6

[0068] By mass, 60 parts of polyethylene, 0.1 part of 1010 (free radical stabilizer), 0.2 part of 168 (free radical stabilizer), 0.7 part of silane coupling agent, and 39 parts of the carbon black prepared in Example 3 were mixed. Subsequently, the mixture was added to a twin-screw extruder for melting. The extrusion temperature was 190 °C, and the extruded product was cooled and pelletized to obtain carbon black masterbatch 3. Carbon black masterbatch 3 (mass fraction 6%) was dispersed in polyethylene resin (mass fraction 94%) again, and the dispersion degree of carbon black was determined according to GB / T18251-2019 "Determination of the Dispersion Degree of Pigments or Carbon Black in Pipes, Fittings and Compounds".

[0069] Comparative Example 4

[0070] By mass, 60 parts of polyethylene, 0.1 part of 1010 (free radical stabilizer), 0.2 part of 168 (free radical stabilizer), 0.7 part of silane coupling agent, and 39 parts of carbon black prepared in Comparative Example 1 were mixed. Subsequently, the mixture was added to a twin-screw extruder for melting. The extrusion temperature was 190 °C, and the extruded product was cooled and pelletized to obtain carbon black masterbatch 4. Carbon black masterbatch 4 (mass fraction 6%) was dispersed again in polyethylene resin (mass fraction 94%), and the dispersion degree of carbon black was measured according to GB / T 18251-2019 Determination of the Dispersion Degree of Pigments or Carbon Black in Pipes, Fittings and Compounds.

[0071] Comparative Example 5

[0072] By mass, 60 parts of polyethylene, 0.1 part of 1010 (free radical stabilizer), 0.2 part of 168 (free radical stabilizer), 0.7 part of silane coupling agent, and 39 parts of carbon black prepared in Comparative Example 2 were mixed. Subsequently, the mixture was added to a twin-screw extruder for melting. The extrusion temperature was 190 °C, and the extruded product was cooled and pelletized to obtain carbon black masterbatch 5. Carbon black masterbatch 5 (mass fraction 6%) was dispersed again in polyethylene resin (mass fraction 94%), and the dispersion degree of carbon black was measured according to GB / T 18251-2019 Determination of the Dispersion Degree of Pigments or Carbon Black in Pipes, Fittings and Compounds.

[0073] Comparative Example 6

[0074] By mass, 60 parts of polyethylene, 0.1 part of 1010 (free radical stabilizer), 0.2 part of 168 (free radical stabilizer), 0.7 part of silane coupling agent, and 39 parts of carbon black prepared in Comparative Example 3 were mixed. Subsequently, the mixture was added to a twin-screw extruder for melting. The extrusion temperature was 190 °C, and the extruded product was cooled and pelletized to obtain carbon black masterbatch 6. Carbon black masterbatch 6 (mass fraction 6%) was dispersed again in polyethylene resin (mass fraction 94%), and the dispersion degree of carbon black was measured according to GB / T 18251-2019 Determination of the Dispersion Degree of Pigments or Carbon Black in Pipes, Fittings and Compounds.

[0075] As Figure 2 shown, the performance data of the polyethylene compounds prepared in the present invention and the comparative samples. The polyethylene material prepared in the present invention has the following characteristics: By using the method of the present invention, the number of polar groups on the carbon black surface is increased. Under the synergistic action of the silane coupling agent, the interaction force with the resin matrix is stronger and the compatibility is increased. The mechanical properties of the material (Examples 4-6) are significantly improved compared with the conventional production method (Comparative Examples 4-6), showing that both the yield strength and the fracture strength are significantly increased. By using the method of the present invention, the carbon black agglomeration phenomenon in the material is weakened and the dispersibility is significantly improved.

[0076] In addition, for the other substances mentioned in this specification, the introduction of the combined examples and data values is as follows, such as Figure 3 as shown.

[0077] Example 7

[0078] Ethylene tar and catalytic slurry (9:1) are incompletely burned in a reaction furnace. A potassium citrate ethanol solution (concentration: 40%) accounting for 30% of the raw oil mass and a 30% maltodextrin aqueous solution (concentration: 40%) are added to the reaction furnace for carbon black production. The reaction temperature is 2500 °C and the reaction furnace pressure is 4.0 Mpa.

[0079] Example 8

[0080] Ethylene tar and catalytic slurry (9:1) are incompletely burned in a reaction furnace. A potassium citrate ethanol solution (concentration: 1%) accounting for 1% of the raw oil mass and a 1% maltodextrin aqueous solution (concentration: 10%) are added to the reaction furnace for carbon black production. The reaction temperature is 1500 °C and the reaction furnace pressure is 0.5 Mpa.

[0081] Example 9

[0082] Ethylene tar and catalytic slurry (9:1) are incompletely burned in a reaction furnace. A potassium sorbate ethanol solution (concentration: 10%) accounting for 1% of the raw oil mass and a 10% maltodextrin aqueous solution (concentration: 10%) are added to the reaction furnace for carbon black production. The reaction temperature is 1850 °C and the reaction furnace pressure is 2.0 Mpa.

[0083] Example 10

[0084] Ethylene tar and catalytic slurry (9:1) are incompletely burned in a reaction furnace. A potassium ricinoleate methanol solution (concentration: 10%) accounting for 1% of the raw oil mass and a 10% maltodextrin aqueous solution (concentration: 10%) are added to the reaction furnace for carbon black production. The reaction temperature is 1850 °C and the reaction furnace pressure is 2.0 Mpa.

[0085] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present invention. After those skilled in the art have read the above content, various modifications and substitutions to the present invention will be obvious. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims

1. A preparation method of easily dispersible pigment carbon black, characterized in that, The method includes: Step S1: Pyrolyze the petroleum-based composite raw material by the incomplete combustion method of an oil furnace. Step S2: Sequentially add an organic carboxylate potassium structure regulator alcohol solution and an aqueous polysaccharide modifier solution during the pyrolysis of the petroleum-based composite raw material to generate carbon black aggregates. Step S3: Refine the carbon black aggregates to generate carbon black.

2. The preparation method of an easily dispersible pigment carbon black according to claim 1, wherein, In the said Step S1, the petroleum-based composite raw material is a compound prepared by mixing vinyl tar and catalytic slurry oil in a ratio of 9:

1.

3. The preparation method of an easily dispersible pigment carbon black according to claim 2, wherein, In the said Step S2, the solute of the organic carboxylate potassium structure regulator alcohol solution is any one or a mixture of two or more of potassium citrate, potassium sorbate, and potassium ricinoleate; the solvent of the organic carboxylate potassium structure regulator alcohol solution is any one of ethanol and methanol.

4. The preparation method of an easily dispersible pigment carbon black according to claim 3, characterized in that, The concentration of the alcohol solution is 1% - 40%, and it is 1% - 30% of the mass of the petroleum-based composite raw material.

5. The preparation method of an easily dispersible pigment carbon black according to claim 4, characterized in that, The organic carboxylate potassium structure regulator alcohol solution reacts in an atomized state, and the reaction pressure is 0.5 - 4.0 MPa; the aqueous polysaccharide modifier solution reacts in an atomized state, and the reaction pressure is 0.5 - 4.0 MPa.

6. The preparation method of an easily dispersible pigment carbon black according to claim 5, wherein, In the said Step S2, the concentration of the aqueous polysaccharide modifier solution is 10% - 40%, and the dosage of the aqueous polysaccharide modifier solution is 1% - 30% of the mass of the petroleum-based composite raw material.

7. The preparation method of an easily dispersible pigment carbon black according to claim 6, characterized in that, The solute of the aqueous polysaccharide modifier solution is maltodextrin.

8. The preparation method of an easily dispersible pigment carbon black according to claim 6, characterized in that, The said Step S3 includes: Step S31: After the carbon black aggregates are quenched rapidly, they are sent to an air preheater and an oil preheater for further temperature reduction. Step S32: Sent to a bag filter, and the separated carbon black is sent to a granulator for granulation. Step S33: Dry in a dryer to obtain carbon black.

9. A method for preparing easily dispersible pigment carbon black according to any one of claims 1 to 8, characterized in that, The reaction temperature during the pyrolysis process is 1500 - 2500 °C.

10. A preparation method of a polyethylene carbon black masterbatch, the method using carbon black generated by a preparation method of an easily dispersible pigment carbon black as described in claim 9; characterized in that, The method includes: Step Q1: Mix polyethylene, pentaerythritol ester, phosphite, silane coupling agent, and carbon black according to a mass fraction of 60:0.1:0.3:0.7:

39. Step Q2: Melt-extrude the mixture at 190 °C. Step Q3: Cool and pelletize the extruded product, and mix it according to a mass fraction of 6:94 of the extruded product and polyethylene resin to obtain a polyethylene carbon black masterbatch.

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