Green liquid paraffin and production method thereof
By using palladium-on-carbon catalyst for hydrogenation and activated carbon for decolorization and deodorization, the environmental pollution problem in the traditional liquid paraffin production process has been solved, and a high-purity, low-cost green liquid paraffin has been produced, which is suitable for use in lubricants, chemical raw materials and fuels.
Patent Information
- Application Number
- CN202610230838.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-27
- Publication Date
- 2026-03-31
AI Technical Summary
The traditional production process of liquid paraffin has environmental pollution problems, and existing improvement solutions have failed to effectively resolve the contradiction between environmental pollution and product performance.
A green liquid paraffin was prepared by using a palladium-on-carbon catalyst for catalytic hydrogenation, combined with crystallization, sweating, filtration, and decolorization and deodorization processes. Activated carbon was used for decolorization and deodorization, and reaction conditions such as temperature and gas flow rate were controlled.
The prepared green liquid paraffin has high purity and good fluidity. The production process is simple and free of solvent pollution, and the equipment investment is low. It is suitable for the fields of lubricants, chemical raw materials or fuels.
Abstract
Description
Technical Field
[0001] This invention relates to the field of paraffin technology, specifically to a green liquid paraffin and its production method. Background Technology
[0002] Traditional liquid paraffin production often involves significant environmental pollution. This pollution stems not only from the selection of raw materials but also from the crude and outdated production processes. Specifically, the raw materials used in traditional liquid paraffin production are mostly derived from non-renewable resources, and their extraction and processing cause irreversible damage to the environment. Furthermore, the lack of precise chemical reaction control and post-processing further exacerbates environmental pollution due to the waste and emissions generated during production.
[0003] While the industry has attempted improvements to address these issues, existing solutions have failed to fundamentally resolve the conflict between environmental pollution and product performance. Therefore, how to significantly reduce the negative environmental impact of liquid paraffin's production process while maintaining its excellent properties has become a pressing technical challenge. Summary of the Invention
[0004] The purpose of this invention is to propose a green liquid paraffin and its production method, which has high purity, low equipment investment, simple production process and low operating costs, and no solvent pollution. The solvent-free method for producing liquid paraffin is more efficient and practical, and is expected to be widely used in the fields of lubricants, chemical raw materials or fuels.
[0005] The technical solution of this invention is implemented as follows: This invention provides a green liquid paraffin, which is produced by catalytically hydrogenating the raw materials, followed by crystallization, sweating, collecting the wax, filtering, decolorizing and deodorizing, and packaging.
[0006] As a further improvement of the present invention, the catalyst used in the catalytic hydrogenation reaction is a palladium-on-carbon catalyst.
[0007] As a further improvement of the present invention, the amount of palladium catalyst added is 0.01-0.02 wt% of the total mass of the system.
[0008] As a further improvement of the present invention, the hydrogen flow rate in the catalytic hydrogenation reaction is 10-15 L / h.
[0009] As a further improvement of the present invention, the reaction conditions for the catalytic hydrogenation reaction are 100-120°C and the reaction time is 1-3h.
[0010] As a further improvement of the present invention, the crystallization method is to first heat to 120-150°C, then cool down at a rate of 5-10°C / h to 10-20°C below the freezing point of the raw material, and hold at that temperature for 30-50 minutes.
[0011] As a further improvement of the present invention, the raw material is kerosene or diesel fraction.
[0012] As a further improvement of the present invention, activated carbon is used for decolorization and deodorization.
[0013] As a further improvement of the present invention, the amount of activated carbon added is 2-4 wt% of the total mass of the system.
[0014] This invention further protects a method for preparing the above-mentioned green liquid paraffin, comprising the following steps: Kerosene or diesel fractions are subjected to catalytic hydrogenation using palladium-on-carbon catalyst at a concentration of 0.01-0.02 wt% of the total system mass. The hydrogen flow rate during the catalytic hydrogenation reaction is 10-15 L / h, and the reaction conditions are 100-120°C for 1-3 h. Crystallization and sweating are then performed. The crystallization method involves first heating to 120-150°C, then cooling at a rate of 5-10°C / h to 10-20°C below the raw material's freezing point, holding at this temperature for 30-50 min, collecting the wax, filtering, and adding 2-4 wt% activated carbon for decolorization and deodorization. The product is then packaged to obtain green liquid paraffin.
[0015] The present invention has the following beneficial effects: This invention employs a simple method to produce liquid paraffin. Through catalytic hydrogenation, unsaturated fatty acids and unsaturated hydrocarbons in the raw materials are hydrogenated to produce saturated aliphatic hydrocarbons, which greatly improves the saturation of the paraffin, giving it excellent fluidity. The preparation method is simple, the obtained liquid paraffin has high purity, low equipment investment, simple production process and low operating costs, and no solvent pollution. The solvent-free method for producing liquid paraffin is more efficient and practical, and is expected to be widely used in the fields of lubricants, chemical raw materials or fuels. Detailed Implementation
[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0017] Example 1 This embodiment provides a method for preparing green liquid paraffin, including the following steps: Kerosene fraction was subjected to catalytic hydrogenation using palladium on carbon catalyst at a rate of 0.01 wt% of the total system mass. The hydrogen flow rate during the catalytic hydrogenation reaction was 10 L / h, and the reaction conditions were 100°C for 1 h. Crystallization and sweating were then carried out. The crystallization method involved first heating to 120°C, then cooling at a rate of 5°C / h to 10°C below the raw material's freezing point, holding at this temperature for 30 min, collecting the wax, filtering, and adding 2 wt% activated carbon for decolorization and deodorization. The product was then packaged to obtain green liquid paraffin.
[0018] Example 2 This embodiment provides a method for preparing green liquid paraffin, including the following steps: Kerosene fraction was subjected to catalytic hydrogenation using palladium on carbon catalyst at a rate of 0.02 wt% of the total system mass. The hydrogen flow rate during the catalytic hydrogenation reaction was 15 L / h, and the reaction conditions were 120°C for 3 h. Crystallization and sweating were then carried out. The crystallization method involved first heating to 150°C, then cooling at a rate of 10°C / h to 20°C below the raw material's freezing point, holding at this temperature for 50 min, collecting the wax, filtering, and adding 4 wt% activated carbon for decolorization and deodorization. The product was then packaged to obtain green liquid paraffin.
[0019] Example 3 This embodiment provides a method for preparing green liquid paraffin, including the following steps: Kerosene fraction was subjected to catalytic hydrogenation using palladium-on-carbon catalyst at a rate of 0.015 wt% of the total system mass. The hydrogen flow rate during the catalytic hydrogenation reaction was 12 L / h, and the reaction conditions were 110°C for 2 hours. Crystallization and sweating were then carried out. The crystallization method involved first heating to 135°C, then cooling at a rate of 7°C / h to 15°C below the raw material's freezing point, holding at this temperature for 40 minutes, collecting the wax, filtering, and adding 3 wt% activated carbon for decolorization and deodorization. The product was then packaged to obtain green liquid paraffin.
[0020] Comparative Example 1 The difference from Example 3 is that no catalytic hydrogenation reaction was performed.
[0021] Specifically as follows: Kerosene fraction is crystallized and evaporated. The crystallization method is to first heat to 135°C, then cool down at a rate of 7°C / h to 15°C below the raw material's freezing point, hold at that temperature for 40 minutes, collect the wax, filter, add 3wt% activated carbon (by weight of the total system mass) for decolorization and deodorization, package, and obtain green liquid paraffin.
[0022] Comparative Example 2 The difference compared to Example 3 is that no decolorization and deodorization were performed.
[0023] Specifically as follows: Kerosene fraction was subjected to catalytic hydrogenation using palladium on carbon catalyst at a rate of 0.015 wt% of the total system mass. The hydrogen flow rate during the catalytic hydrogenation reaction was 12 L / h, and the reaction conditions were 110°C for 2 h. Crystallization and sweating were then carried out. The crystallization method involved first heating to 135°C, then cooling at a rate of 7°C / h to 15°C below the raw material's freezing point, holding at this temperature for 40 min, collecting the wax, filtering, and packaging to obtain green liquid paraffin.
[0024] Test Example 1 The green liquid paraffins prepared in Examples 1-3 and Comparative Examples 1-2 of this invention were subjected to performance tests, and the results are shown in Table 1.
[0025] Table 1 Group Initial boiling point (°C) 98% distillation temperature (°C) n-Alkane content (%) Example 1 192 255 98.12 Example 2 194 253 98.44 Example 3 195 257 98.57 Comparative Example 1 179 231 93.09 Comparative Example 2 184 245 94.56 As can be seen from the table above, the green liquid paraffin obtained in Examples 1-3 of this invention has higher quality.
[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A green liquid paraffin, characterized in that, Green liquid paraffin is produced by catalytically hydrogenating the raw materials, followed by crystallization, sweating, collecting the wax, filtering, decolorizing and deodorizing, and packaging.
2. The green liquid paraffin according to claim 1, characterized in that, The catalyst used in the catalytic hydrogenation reaction is a palladium-on-carbon catalyst.
3. The green liquid paraffin according to claim 2, characterized in that, The amount of palladium catalyst added is 0.01-0.02 wt% of the total mass of the system.
4. The green liquid paraffin according to claim 1, characterized in that, The hydrogen flow rate in the catalytic hydrogenation reaction is 10-15 L / h.
5. The green liquid paraffin according to claim 1, characterized in that, The reaction conditions for the catalytic hydrogenation reaction are 100-120℃ and 1-3h.
6. The green liquid paraffin according to claim 1, characterized in that, The crystallization method involves first heating to 120-150℃, then cooling down at a rate of 5-10℃ / h to 10-20℃ below the freezing point of the raw material, and holding at that temperature for 30-50 minutes.
7. The green liquid paraffin according to claim 1, characterized in that, The raw material is kerosene or diesel fraction.
8. The green liquid paraffin according to claim 1, characterized in that, Activated carbon is used for decolorization and deodorization.
9. The green liquid paraffin according to claim 7, characterized in that, The amount of activated carbon added is 2-4 wt% of the total mass of the system.
10. A method for preparing green liquid paraffin as described in any one of claims 1-9, characterized in that, Includes the following steps: Kerosene or diesel fractions are subjected to catalytic hydrogenation using palladium-on-carbon catalyst at a concentration of 0.01-0.02 wt% of the total system mass. The hydrogen flow rate during the catalytic hydrogenation reaction is 10-15 L / h, and the reaction conditions are 100-120°C for 1-3 h. Crystallization and sweating are then performed. The crystallization method involves first heating to 120-150°C, then cooling at a rate of 5-10°C / h to 10-20°C below the raw material's freezing point, holding at this temperature for 30-50 min, collecting the wax, filtering, and adding 2-4 wt% activated carbon for decolorization and deodorization. The product is then packaged to obtain green liquid paraffin.