Solvent dye production and processing technology

Abstract

The invention provides a solvent dye production and processing technology. The solvent dye production and processing technology comprises the following steps of S1, raw material preparation, S2, raw material mixing, S3, heating reaction, S4, cooling and crystallization, S5, separation and washing, S6, drying and S7, crushing and packaging. According to the solvent dye production and processing technology provided by the invention, full contact and uniform mixing of the raw materials are ensured by optimizing the raw material ratio and mixing conditions, so that the reaction time is shortened, and the production efficiency is improved. And the completeness and purity of dye crystallization are ensured by accurately controlling the reaction temperature and optimizing the use of the precipitant, so that the product quality is improved. The optimized washing and drying process reduces the energy consumption and the waste of raw materials, simplifies the process flow and reduces the production cost. The improved process reduces the use of harmful solvents and the discharge of wastes, conforms to the principle of green chemistry, and reduces the pollution to the environment.

Description

Technical Field

[0001] The invention relates to the technical field of solvent dye production, in particular to a solvent dye production and processing technology. Background Art

[0002] The production and processing technology of solvent dyes belongs to the field of fine chemicals and is mainly used in industries such as textiles, plastics, inks, and coatings to give products specific colors and aesthetics. In the traditional production process of solvent dyes, it is usually necessary to go through steps such as raw material preparation, mixing, heating reaction, cooling crystallization, separation washing, drying, crushing and packaging. Among these steps, the selection of raw materials, control of reaction conditions, use of precipitants, and optimization of washing and drying processes have a decisive influence on the quality and performance of the final product.

[0003] In the existing technology, there are some problems in the production of solvent dyes, such as low reaction efficiency, high energy consumption, low product purity, high production cost, etc. These problems are mainly caused by factors such as uneven mixing of raw materials, imprecise reaction temperature control, improper selection of precipitants, incomplete washing, and unsuitable drying conditions. Summary of the invention

[0004] The present invention provides an improved solvent dye production and processing technology, which effectively improves the production efficiency and product quality of the dye, reduces the production cost, and reduces the impact on the environment by optimizing the raw material ratio, mixing conditions, reaction temperature, precipitant use, washing and drying processes. The process is particularly suitable for producing high-performance solvent dyes and meets the market demand for high-quality dyes.

[0005] To achieve the above object, the present invention provides the following technical solution: The present invention provides a solvent dye production and processing process, comprising the following steps:

[0006] S1. Raw material preparation:

[0007] Take 23 to 56 parts by mass of anthraquinone, 12 to 32 parts by mass of solvent, 5 to 9 parts by mass of catalyst, 3 to 6 parts by mass of auxiliary agent and 2 to 4 parts by mass of heat-resistant agent for later use;

[0008] S2. Mixed raw materials:

[0009] The prepared anthraquinone, solvent, catalyst, auxiliary agent and heat-resistant agent are mixed evenly according to a proportion to form a uniform mixture;

[0010] S3, heating reaction:

[0011] The mixture is placed in a reactor, slowly heated to 150-200 degrees Celsius, and maintained at this temperature for reaction until the reaction is complete;

[0012] S4, cooling and crystallization:

[0013] The reaction mixture is cooled to room temperature, and then a suitable amount of precipitant is added to allow the dye to crystallize;

[0014] S5, separation and washing:

[0015] Separating the dye crystals from the solvent by filtration or other methods, and then washing the crystals with a suitable solvent to remove residual impurities;

[0016] S6. Drying:

[0017] The washed dye crystals are dried at an appropriate temperature to remove water and other volatile substances;

[0018] S7. Crushing and packaging:

[0019] The dried dye is crushed to the required particle size, then quality inspected, and packaged after passing the inspection to obtain the final product.

[0020] Preferably, the stirring speed in S2 is medium speed and the time is 30 minutes to ensure sufficient contact and uniform mixing between the raw materials.

[0021] Preferably, the precipitant in S4 is ethanol, and its added amount is 10%-20% of the total volume of the mixture to ensure the completeness and purity of the dye crystallization.

[0022] Preferably, the washing solvent in S5 is deionized water, and the washing times are 3-5 times. After each washing, the mixture needs to be thoroughly filtered to ensure the high purity of the crystals.

[0023] Preferably, the drying temperature in S6 is 50-70 degrees Celsius and the drying time is 2-4 hours to prevent the dye crystals from decomposing due to excessive temperature. The particle size after crushing in S7 should be controlled between 100-200 meshes to meet the particle size requirements of different application fields.

[0024] Preferably, the solvent is one or more of acetone, methyl ethyl ketone, diethyl ether, and ethylene oxide.

[0025] Preferably, the catalyst is one or more of sulfuric acid, p-toluenesulfonic acid, sodium peroxide, and triethylamine.

[0026] Preferably, the auxiliary agent is one or more of butanone, isopropanol, ethylene glycol, toluene and xylene.

[0027] Preferably, the heat-resistant agent is one or more of polyimide resin, dimethyl silicone oil, and methyltriethoxysilane.

[0028] The present invention has at least the following beneficial effects:

[0029] The invention provides a solvent dye production and processing technology, which ensures full contact and uniform mixing between raw materials by optimizing raw material ratio and mixing conditions, thereby shortening the reaction time and improving production efficiency. By accurately controlling the reaction temperature and optimizing the use of precipitants, the completeness and purity of dye crystallization are ensured, thereby improving the quality of the product. The optimized washing and drying process reduces energy consumption and waste of raw materials, simplifies the process flow, and reduces production costs. The improved process reduces the use of harmful solvents and the discharge of waste, conforms to the principle of green chemistry, and reduces pollution to the environment.

[0030] The solvent dye production and processing technology of the present invention is particularly suitable for producing high-performance solvent dyes, can meet the market demand for high-quality dyes, and has significant technical advantages and market application value. DETAILED DESCRIPTION

[0031] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by technicians in the technical field to which the invention belongs. The terms used in this specification and in the description of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0032] Example 1

[0033] A solvent dye production and processing process may include the following steps:

[0034] S1. Raw material preparation:

[0035] Before carrying out the chemical reaction, a series of raw materials are first prepared, including 23 parts of anthraquinone, 12 parts of solvent, 5 parts of catalyst, 3 parts of auxiliary agent and 2 parts of heat-resistant agent. The solvent can be selected from acetone, methyl ethyl ketone, diethyl ether, ethylene oxide, or any combination of these solvents. The choice of catalyst is also flexible, and can be one of sulfuric acid, p-toluenesulfonic acid, sodium peroxide, triethylamine, or any combination of these catalysts. For auxiliary agents, one or more of butanone, isopropanol, ethylene glycol, toluene and xylene can be selected. As for the heat-resistant agent, it can be one or more of polyimide resin, dimethyl silicone oil and methyltriethoxysilane.

[0036] S2. Mixed raw materials:

[0037] After the raw materials are ready, the next step is to mix them evenly according to the predetermined ratio. During the mixing process, the stirring speed needs to be controlled to keep it at a medium speed to ensure that the raw materials can fully contact and mix evenly. The mixing time takes about 30 minutes to ensure the uniformity of the raw materials and lay a good foundation for the subsequent chemical reaction.

[0038] S3, heating reaction:

[0039] The mixed raw materials then need to be transferred to the reactor and slowly heated. The target temperature range for heating is 150-200 degrees Celsius, which is determined based on the characteristics of the chemical reaction and the stability of the raw materials. After reaching the target temperature, it needs to be maintained for a period of time until the reaction is complete. The length of the reaction time will be adjusted accordingly according to the specific reaction conditions and the characteristics of the raw materials to ensure that the reaction is completely completed.

[0040] S4, cooling and crystallization:

[0041] After the chemical reaction is completed, the next step is to cool the mixture in the reactor to room temperature. After cooling, it is necessary to add an appropriate amount of precipitation agent to the mixture to promote the crystallization process of the dye. In this embodiment, the precipitation agent is ethanol, and its addition amount is 10%-20% of the total volume of the mixture. After adding the precipitation agent, it is necessary to fully stir the mixture to ensure that the dye can be uniformly crystallized.

[0042] S5, separation and washing:

[0043] The dye crystals can be effectively separated from the solvent by filtration and other methods. After separation, the dye crystals are washed with deionized water as the washing solvent. The number of washes is generally 3-5 times, and after each wash, it is necessary to filter thoroughly to remove residual impurities and ensure the high purity of the dye crystals.

[0044] S6. Drying:

[0045] The washed dye crystals are placed at a temperature of 50-70 degrees Celsius for drying. The drying time is controlled at 2-4 hours, and this length of time is determined according to the characteristics of the crystals and the performance of the drying equipment. During the drying process, the temperature needs to be closely monitored to avoid excessive temperature causing the dye crystals to decompose, thereby affecting the quality of the final product.

[0046] S7. Crushing and packaging:

[0047] The dried dye needs to be crushed to a particle size between 100-200 mesh. After crushing, the dye undergoes a quality inspection, and only dyes that pass the inspection can enter the next step of packaging. After passing the strict quality inspection, the dye will be packaged into a final product and ready for sale or use.

[0048] Example 2

[0049] A solvent dye production and processing process may include the following steps:

[0050] S1. Raw material preparation:

[0051] Before carrying out the chemical reaction, a series of raw materials are first prepared, including 32 parts of anthraquinone, 15 parts of solvent, 7 parts of catalyst, 3.9 parts of auxiliary agent and 2.1 parts of heat-resistant agent. The solvent can be one of acetone, methyl ethyl ketone, diethyl ether, ethylene oxide, or any combination of these solvents. The choice of catalyst is also flexible, and can be one of sulfuric acid, p-toluenesulfonic acid, sodium peroxide, triethylamine, or any combination of these catalysts. For auxiliary agents, one or more of butanone, isopropanol, ethylene glycol, toluene, and xylene can be selected. As for the heat-resistant agent, it can be one or more of polyimide resin, dimethyl silicone oil, and methyltriethoxysilane.

[0052] The other steps are the same as in Example 1.

[0053] Example 3

[0054] A solvent dye production and processing process may include the following steps:

[0055] S1. Raw material preparation:

[0056] Before carrying out the chemical reaction, a series of raw materials are first prepared, including 42 parts of anthraquinone, 28 parts of solvent, 8 parts of catalyst, 5 parts of auxiliary agent and 2.9 parts of heat-resistant agent. The choice of solvent can be one of acetone, methyl ethyl ketone, diethyl ether, ethylene oxide, or any combination of these solvents. The choice of catalyst is also flexible, and can be one of sulfuric acid, p-toluenesulfonic acid, sodium peroxide, triethylamine, or any combination of these catalysts. For auxiliary agents, one or more of butanone, isopropanol, ethylene glycol, toluene, and xylene can be selected. As for the heat-resistant agent, it can be one or more of polyimide resin, dimethyl silicone oil, and methyltriethoxysilane.

[0057] The other steps are the same as in Example 1.

[0058] Example 4

[0059] A solvent dye production and processing process may include the following steps:

[0060] S1. Raw material preparation:

[0061] Before carrying out the chemical reaction, a series of raw materials are first prepared, including 56 parts of anthraquinone, 31 parts of solvent, 9 parts of catalyst, 6 parts of auxiliary agent and 3.8 parts of heat-resistant agent. The choice of solvent can be one of acetone, methyl ethyl ketone, diethyl ether, ethylene oxide, or any combination of these solvents. The choice of catalyst is also flexible, and can be one of sulfuric acid, p-toluenesulfonic acid, sodium peroxide, triethylamine, or any combination of these catalysts. For auxiliary agents, one or more of butanone, isopropanol, ethylene glycol, toluene, and xylene can be selected. As for the heat-resistant agent, it can be one or more of polyimide resin, dimethyl silicone oil, and methyltriethoxysilane.

[0062] The other steps are the same as in Example 1.

[0063] Through the above embodiments, the present invention provides a solvent dye production and processing technology, which effectively improves the production efficiency and product quality of the dye, reduces production costs, and reduces the impact on the environment by optimizing the raw material ratio, mixing conditions, reaction temperature, precipitant use, washing and drying processes.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they may still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A solvent dye production and processing process, characterized in that: The following steps are involved: S1. Raw material preparation: Take 23 to 56 parts by mass of anthraquinone, 12 to 32 parts by mass of solvent, 5 to 9 parts by mass of catalyst, 3 to 6 parts by mass of auxiliary agent and 2 to 4 parts by mass of heat-resistant agent for later use; S2. Mixed raw materials: The prepared anthraquinone, solvent, catalyst, auxiliary agent and heat-resistant agent are mixed evenly according to a proportion to form a uniform mixture; S3, heating reaction: The mixture is placed in a reactor, slowly heated to 150-200 degrees Celsius, and maintained at this temperature for reaction until the reaction is complete; S4, cooling and crystallization: The reaction mixture is cooled to room temperature, and then a suitable amount of precipitant is added to allow the dye to crystallize; S5, separation and washing: Separating the dye crystals from the solvent by filtration or other methods, and then washing the crystals with a suitable solvent to remove residual impurities; S6. Drying: The washed dye crystals are dried at an appropriate temperature to remove water and other volatile substances; S7. Crushing and packaging: The dried dye is crushed to the required particle size, then quality inspected, and packaged after passing the inspection to obtain the final product.

2. A solvent dye production and processing process according to claim 1, characterized in that: The stirring speed in S2 is medium and the stirring time is 30 minutes to ensure sufficient contact and uniform mixing between the raw materials.

3. A solvent dye production and processing process according to claim 1, characterized in that: The precipitant in S4 is ethanol, and its added amount is 10%-20% of the total volume of the mixture to ensure the completeness and purity of the dye crystallization.

4. A solvent dye production and processing process according to claim 1, characterized in that: The washing solvent in S5 is deionized water, and the washing times are 3-5 times. After each washing, the crystals need to be thoroughly filtered to ensure high purity of the crystals.

5. A solvent dye production and processing process according to claim 1, characterized in that: The drying temperature in S6 is 50-70 degrees Celsius and the drying time is 2-4 hours to prevent the dye crystals from decomposing due to excessive temperature. The particle size after crushing in S7 should be controlled between 100-200 meshes to meet the particle size requirements of different application fields.

6. A solvent dye production and processing process according to claim 1, characterized in that: The solvent is one or more of acetone, methyl ethyl ketone, diethyl ether and ethylene oxide.

7. A solvent dye production and processing process according to claim 1, characterized in that: The catalyst is one or more of sulfuric acid, p-toluenesulfonic acid, sodium peroxide and triethylamine.

8. A solvent dye production and processing process according to claim 1, characterized in that: The auxiliary agent is one or more of butanone, isopropanol, ethylene glycol, toluene and xylene.

9. A solvent dye production and processing process according to claim 1, characterized in that: The heat-resistant agent is one or more of polyimide resin, dimethyl silicone oil and methyltriethoxysilane.