阅读说明：本技术 一种调制高品质铝箔轧制基础油的方法和应用 (Method for preparing high-quality aluminum foil rolling base oil and application ) 是由 崔岩 迟九龙 窦梦冬 冯侠 于 2020-05-27 设计创作，主要内容包括：本发明涉及一种调制高品质铝箔轧制基础油的方法,所述方法以经过脱除杂质处理的合成气经费托合成工段、脱轻塔脱轻、脱重塔脱重,得到高纯净的C10-C15的正构烷烃和异构烷烃混合馏分油为原料,经多孔金属有机框架材料脱除,可得到粘度低、馏分窄、异构含量高的低硫低芳铝箔轧制基础油。本发明方法制得的产品异构烷烃含量高,碳链集中,馏分窄,反复再生使用不影响产品质量。粘度低、油膜铺展快、润滑均匀、退火清净性好,可有效减少退火时间。不饱和烃极低,氧化安定性好,使用寿命长,基本无味,对人体和环境更友好。(The invention relates to a method for preparing high-quality aluminum foil rolling base oil, which takes synthesis gas subjected to impurity removal treatment through a Fischer-Tropsch synthesis section, a light component removal tower for removing light components and a heavy component removal tower for removing heavy components to obtain high-purity normal paraffin and isoparaffin mixed distillate oil of C10-C15 as a raw material, and the high-purity normal paraffin and isoparaffin mixed distillate oil is removed through a porous metal organic framework material to obtain low-sulfur low-aromatic aluminum foil rolling base oil with low viscosity, narrow fraction and high isomeric content. The product prepared by the method has high content of isoparaffin, concentrated carbon chain, narrow fraction and no influence on the product quality after repeated regeneration and use. Low viscosity, fast oil film spreading, uniform lubrication, good annealing detergency and effectively reduced annealing time. The unsaturated hydrocarbon is extremely low, the oxidation stability is good, the service life is long, the odor is basically absent, and the method is more friendly to the human body and the environment.)

1. A method for preparing high-quality base oil for rolling aluminum foil is characterized by comprising the following steps: the method comprises the steps of subjecting synthesis gas subjected to impurity removal treatment to a Fischer-Tropsch synthesis section, light component removal in a light component removal tower and heavy component removal in a heavy component removal tower to obtain high-purity mixed distillate oil of normal paraffin and isoparaffin of C10-C15 serving as a raw material, and removing the high-purity mixed distillate oil by using a porous metal organic framework material to obtain low-sulfur low-aromatic aluminum foil rolling base oil with low viscosity, narrow fraction and high isomeric content.

2. The method for preparing a high quality aluminum foil rolling base oil according to claim 1, wherein: the light component is removed by a light component removing tower to obtain distillate oil mixed by normal paraffin and isoparaffin of C10-C20.

3. The method for preparing a high quality aluminum foil rolling base oil according to claim 1, wherein: after the heavy component is removed by the heavy component removing tower, the distillate oil of the mixture of normal alkane and isoparaffin of C10-C15 is obtained.

4. The method for preparing a high quality aluminum foil rolling base oil according to claim 1, wherein: the porous metal organic framework material is one of ZIF-8, ZIF-67 and CuBTC.

5. The method for preparing a high quality aluminum foil rolling base oil according to claim 1, wherein: the aperture of the porous metal organic framework material is 0.6-0.9nm, the removal temperature is 180-320 ℃, and the pressure is 1-3 MPa.

6. The method for preparing a high quality aluminum foil rolling base oil according to claim 1, wherein: in the aluminum foil rolling base oil, the normal alkane of C10-C15 accounts for 4-8%, the isoparaffin of C10-C15 accounts for 92-96%, the component of C12-C13 accounts for 90-96%, the aromatic hydrocarbon content is less than 0.001-0.1%, and the sulfur content is less than 0.2%.

7. The method for preparing a high quality aluminum foil rolling base oil according to any one of claims 1 to 6, wherein: the initial boiling point of the base oil for rolling the aluminum foil is 205-210 ℃, the final boiling point is 215-230 ℃, and the flash point is 80-90 ℃.

8. Use of the aluminum foil rolling base oil produced by the method for preparing a high-quality aluminum foil rolling base oil according to any one of claims 1 to 6 for producing an aluminum foil finish rolling base oil.

Technical Field

The invention belongs to the technical field of coal chemical industry, and particularly relates to a method for preparing high-quality aluminum foil rolling base oil and application thereof.

Background

The aluminum foil has wide application in the aspects of wires, cables, instruments, aviation, food, medicine packaging, air conditioners and the like, becomes an indispensable material in production and life, and has increasingly large consumption. For the aluminum foil rolling process, rolling oil is one of three major elements in aluminum processing production. In the aluminum rolling oil, base oil is a main component and usually accounts for 93-95%, and the quality of the performance of the base oil is directly related to whether aluminum production can be smoothly carried out and the quality of the surface of an aluminum foil after rolling. Therefore, the quality of the base oil has a decisive role in the production process of aluminum processing and the quality of products.

The good aluminum rolling base oil has to meet the requirements of no toxicity, low odor, low viscosity, high flash point, low final boiling point, narrow cut, no oil stain during annealing, good oxidation stability, surface smoothness and the like. These properties are closely linked to their chemical composition, carbon number distribution and carbon chain structure.

The closed flash point of the base oil for aluminum foil rolling is generally required to be not lower than 80 ℃, the flash point is improved, and the running safety of a rolling mill can be improved. The flash point of the base oil is reduced along with the increase of the content of light components, so that the light components are removed after the raw oil is subjected to lightness removal through a lightness removing tower, and the mixed distillate oil of C10-C20 is obtained.

The initial boiling point reflects the use safety of rolling oil, an oil product with a lower initial boiling point is easy to cause fire in the rolling process, and the initial boiling point of the base oil is required to be higher than 200 ℃ industrially; the final distillation point reflects the cleanness of the rolling oil in the using process, is too high, and easily generates brown spots when the aluminum foil is annealed, so the surface quality of the product is influenced, and therefore, the final distillation point of the rolling oil is lower than the annealing temperature of the aluminum foil by 300 ℃. In addition to meeting the distillation range requirements, the narrower the distillation range width of the base oil, the better. The distillation range is narrowed, so that the evaporation tendency is reduced, the viscosity of oil products can be kept stable, the stable operation of a rolling mill in the running process is facilitated, the discharge amount of oil gas to an operation room is reduced, and the improvement of operation conditions is facilitated. The distillation range of the base oil is mainly related to the carbon chain distribution thereof. When the carbon chain distribution of the oil product is narrower, the distillation range is correspondingly narrower, and the narrow distillation range base oil with higher performance can be developed by controlling the carbon chain distribution of the base oil. If the carbon chain of the base oil is too long, the final distillation point is high, the viscosity is high, the aromatic hydrocarbon and sulfur content are high, stains are easily formed on the surface of the aluminum foil after rolling annealing, and the surface quality is influenced. Therefore, the distillate oil mixed by the normal paraffin and the isoparaffin of C10-C20 is subjected to weight removal by a weight removal tower to obtain the mixed distillate oil of C10-C15.

Because the aluminum material matrix is softer and the surface quality is more difficult to control, particularly for foil materials, the rolling speed is faster and faster, and the surface quality requirement is higher and higher, so that the aluminum foil rolling base oil is required to have higher stability and friction reduction capability. The larger the pressure-viscosity coefficient of the oil product is, the better the lubricating property is. The pressure-viscosity coefficient of the isoparaffin is much larger than that of the normal paraffin, especially the oil film is thicker under high pressure, and the lubricating property is obviously better than that of the normal paraffin.

After the aluminum foil is rolled, annealing treatment is required, and the temperature is generally 280-400 ℃. The annealing performance of the base oil is not only related to the carbon number distribution, but also closely related to the chemical composition of the base oil, and under the condition of a certain carbon number distribution, the annealing cleaning performance of the oil product is better when the base oil contains more isoparaffin. The main reason that n-alkanes are inferior to isoparaffins in annealing performance is that n-alkanes have poor solubility and cannot completely dissolve the additive, and the undissolved additive molecules are aggregated together due to the influence of intermolecular van der waals forces and adsorb aluminum powder fine particles scattered in the rolling oil to form large molecular groups or polar groups, which easily form aluminum stickies or oil spots under annealing conditions.

The most sensitive problem of the aluminum processing industry is the safety problem, with the highest probability of the cold rolling mill firing. The molecular groups of the additive absorb aluminum powder to grow up due to the poor dissolving capacity of the normal alkane for the additive, and when the molecular groups of the additive are adhered to a roller or a bearing which runs at a high speed, the normal alkane is poor in safety and stability due to the fact that heat is generated by friction and the aluminum powder is inflammable and explosive. The sensitivity of the isoparaffin base oil to the additive is obviously superior to that of normal paraffin base oil, the rolling mill generates electricity by friction during rolling, the sprayed oil also generates a certain amount of static electricity, the static electricity is accumulated to a certain degree and is easy to cause ignition, and the isoparaffin oil with better conductivity and antistatic property is selected to prevent the static ignition, so that the safety and stability of the isoparaffin are higher.

Through searching, the following patent publications related to the patent application of the invention are found:

a process for preparing the low-sulfur low-arylaluminium foil rolling base oil (CN1730615) includes such steps as extracting the straight-run light diesel oil fraction at 90-140 deg.C with the volume ratio of raw oil to extractant of 1: 4-8, ordinary pressure, 5-20 min for each extraction stage and 5-12 extraction stages with the solvent chosen from diglycol, triglycol and tetraglycol whose water content is 1-10 wt%, and water washing after extraction and separation. The adding amount of deionized water is 1-20% of the volume of distillate oil, the temperature is 20-60 ℃, and the time is 5-10 minutes. The aromatic hydrocarbon content of the prepared aluminum foil rolling base oil is less than 1 percent by mass, and the sulfur content is less than 5 mg.

By contrast, the invention removes the mixed distillate oil of C10-C15 by the porous metal organic framework material, and can obtain the high-performance base oil for rolling the aluminum foil, wherein the normal alkane of C10-C15 accounts for 4-8%, the isoparaffin of C10-C15 accounts for 92-96%, the component of C12-C13 accounts for 90-96%, the aromatic hydrocarbon content is less than 0.001-0.1%, and the sulfur content is less than 0.2%. The present invention is fundamentally different from the above patent publications.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a method for preparing high-quality aluminum foil rolling base oil and application thereof.

The technical scheme adopted by the invention for solving the technical problem is as follows:

a method for preparing high-quality aluminum foil rolling base oil is characterized in that synthesis gas subjected to impurity removal treatment is subjected to a Fischer-Tropsch synthesis section, light component removal by a light component removal tower and heavy component removal by a heavy component removal tower to obtain high-purity normal paraffin and isoparaffin mixed distillate oil of C10-C15, and the high-purity normal paraffin and isoparaffin mixed distillate oil is used as a raw material and is removed by a porous metal organic framework material to obtain low-sulfur low-aromatic aluminum foil rolling base oil with low viscosity, narrow fraction and high isomeric content.

And the light component is removed by a light component removing tower to obtain distillate oil mixed by normal paraffin and isoparaffin of C10-C20.

And after the heavy component is removed by the heavy component removing tower, distillate oil which is formed by mixing normal paraffin and isoparaffin of C10-C15 is obtained.

And the porous metal organic framework material is one of ZIF-8, ZIF-67 and CuBTC.

Moreover, the aperture of the porous metal organic framework material is 0.6-0.9nm, the removal temperature is 180-320 ℃, and the pressure is 1-3 MPa.

In the aluminum foil rolling base oil, the normal alkane of C10-C15 accounts for 4-8%, the isoparaffin of C10-C15 accounts for 92-96%, the component of C12-C13 accounts for 90-96%, the aromatic hydrocarbon content is less than 0.001-0.1%, and the sulfur content is less than 0.2%.

Moreover, the initial boiling point of the base oil for rolling the aluminum foil is 205-210 ℃, the final boiling point is 215-230 ℃, and the flash point is 80-90 ℃.

The aluminum foil rolling base oil prepared by the method for preparing the high-quality aluminum foil rolling base oil is applied to the preparation of the aluminum foil finish rolling base oil.

The invention has the advantages and positive effects that:

1. the product prepared by the method has high content of isoparaffin, concentrated carbon chain, narrow fraction and no influence on the product quality after repeated regeneration and use. Low viscosity, fast oil film spreading, uniform lubrication, good annealing detergency and effectively reduced annealing time. The unsaturated hydrocarbon is extremely low, the oxidation stability is good, the service life is long, the odor is basically absent, and the method is more friendly to the human body and the environment.

2. The product of the invention is used for surface treatment of the aluminum foil plate, and the dyne value of the surface of the aluminum foil plate treated by the product is more than 42mN/m, so that the cleaning procedure can be omitted, the surface cleanliness of the aluminum foil plate is improved, and the generation of oil spots is reduced.

3. The oil products of the aluminum foil rolling base oil with different isomeric contents can be customized according to rolling varieties, process requirements and the like by customizing porous metal organic framework materials with different types and different apertures.

4. The synthesis gas which is strictly subjected to impurity removal treatment is subjected to Fischer-Tropsch synthesis section, light component removal in a light component removal tower, heavy component removal in a heavy component removal tower and separation by a porous metal organic framework material, so that the high-performance base oil for rolling aluminum foil, which contains 4-8% of C10-C15 normal paraffins, 92-96% of C10-C15 isoparaffins, 90-96% of C12-C13 components, less than 0.001-0.1% of aromatic hydrocarbons and less than 0.2% of sulfur, is obtained. The initial boiling point of the obtained base oil is 205-210 ℃, the final boiling point is 215-230 ℃ and the flash point is 80-90 ℃, so that the composition has excellent performance and is particularly suitable for preparing high-purity aluminum foil finish rolling base oil. Has the characteristics of low viscosity, narrow fraction, high flash point, high isomeric content, no toxicity, low odor and the like. The method can prepare high-quality aluminum foil rolling base oil with excellent performance.

Detailed Description

The present invention is further illustrated by the following examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.

The raw materials used in the invention are all conventional commercial products if no special description is provided, the method used in the invention is all conventional methods in the field if no special description is provided, and the mass of all the materials used in the invention is the conventional use mass.