Special oil for parking air heating machine and preparation process of special oil

Abstract

The invention discloses special oil for a parking air heating machine and a preparation process thereof, and relates to the technical field of preparation of fuel oil, and the preparation process comprises the following steps: selecting a petroleum fraction containing C10-C16 alkane as a raw material, pretreating the raw material, and performing catalytic isomerization reaction to obtain a mixture of C13-C14 isoparaffin; the method comprises the following steps: separating and purifying a mixture of C13-C14 isoparaffin through a vacuum distillation process to obtain purified C13-C14 isoparaffin; the purified C13-C14 isoparaffin is subjected to deep dewaxing treatment, and the C13-C14 isoparaffin, namely the parking air heating machine special oil, is obtained; according to the special oil for the parking air heating machine and the preparation process thereof, the special oil for the air heating machine has a higher heat value, heat energy can be converted more efficiently, and the energy utilization efficiency is improved; and meanwhile, due to the characteristic of high condensation point, the oil product can keep flowability in an extremely cold environment, so that the air heating machine can normally operate at the low temperature of-65 DEG C.

Description

Technical Field

[0001] The invention relates to a fuel oil preparation technology, and in particular to a parking air heater special oil and a preparation process thereof. Background Art

[0002] Parking air heater, full name parking air heater, is a heating device used when the vehicle is stopped, mainly used to provide warmth inside the vehicle to ensure the comfort of the driver and passengers, especially in cold weather conditions. This device is usually installed in the cab of large vehicles such as trucks, buses, construction machinery, etc. to provide additional warm air.

[0003] In traditional air heater applications, diesel is commonly used as an energy source. Diesel is mainly composed of hydrocarbon compounds with carbon atoms between 10 and 22, and contains a certain amount of aromatics and sulfur, which makes it easy to produce carbon deposits and corrosive substances during combustion, causing adverse effects on the environment and equipment. In addition, diesel has a high condensation point and cannot meet the operating requirements of air heaters in extremely low temperature environments, limiting its application in cold areas. With the enhancement of environmental awareness and the pursuit of energy efficiency, the market demand for a cleaner, more efficient, and stable air heater oil that can work at extremely low temperatures is growing. However, existing diesel products cannot fully meet these requirements, and there are problems such as low combustion efficiency, environmental pollution, equipment corrosion, and performance degradation in low temperature environments. Summary of the invention

[0004] The purpose of the present invention is to provide a parking air heater special oil and a preparation process thereof, so as to solve the problems of low combustion efficiency, environmental pollution, equipment corrosion and performance degradation in low temperature environment in the prior art.

[0005] In order to achieve the above-mentioned object, the present invention provides the following technical solution: a parking air heater special oil, the parking air heater special oil is composed of C13-C14 isoparaffins, and the molecular structure of the C13-C14 isoparaffins contains at least one branched structure.

[0006] A preparation process of a parking air heater oil, comprising:

[0007] S1. Selecting a petroleum fraction containing C10-C16 alkanes as a raw material and pretreating the raw material;

[0008] S2, performing a catalytic isomerization reaction on the pretreated raw material to obtain a mixture of C13-C14 isoparaffins;

[0009] S3, separating and purifying the mixture of C13-C14 isoparaffins by a vacuum distillation process to obtain purified C13-C14 isoparaffins;

[0010] S4, deep dewaxing the purified C13-C14 isoparaffins to obtain C13-C14 isoparaffins, i.e., parking air heater oil;

[0011] S5. After the parking air heater special oil is tested for quality and qualified, it is packaged to obtain a parking air heater special oil finished product.

[0012] Furthermore, the pretreatment in S1 includes deasphalting, desulfurization and denitrification steps.

[0013] Furthermore, the deasphalting is performed by removing asphaltene through activated clay or alumina, and the desulfurization and denitrification are performed by removing sulfur and nitrogen through hydrogenation.

[0014] Furthermore, the sulfur content of the raw material after the treatment in S2 is lower than 0.05wt%, and the nitrogen content is lower than 0.01wt%.

[0015] Furthermore, the reaction temperature of the catalytic isomerization reaction in S2 is 200-400° C., the reaction pressure is 0.1-5 MPa, the reaction time is 1-10 hours, and the solid acid catalyst used in the catalytic isomerization reaction is zeolite, alumina or silica.

[0016] Furthermore, the catalytic isomerization reaction in S2 uses hydrogen as a co-reaction gas, and the volume ratio of hydrogen to the pretreated raw material is 1:5-20.

[0017] Furthermore, the vacuum distillation in S3 includes: reducing the pressure in the distillation tower to a range of 10 to 50 kPa, heating the C13-C14 isoparaffin mixture in the distillation tower, condensing the evaporated steam through a condenser, and collecting the condensed liquid.

[0018] Furthermore, the solvent used in the dewaxing treatment in S4 is methyl ethyl ketone.

[0019] Furthermore, the temperature of the dewaxing treatment in S4 is -20°C.

[0020] Compared with the prior art, the invention provides a parking air heater oil and its preparation process. The parking air heater oil adopts C13-C14 isoparaffin as the main raw material, isoparaffin without aromatics, high freezing point -65℃, flash point 110℃, high cleanliness, high calorific value, UV resistance, no sulfur, no carbon deposits, no corrosion, no odor, and overcomes the disadvantages of diesel; high calorific value can convert heat energy more efficiently and improve energy utilization efficiency; at the same time, due to its high condensation point characteristics, the oil can maintain fluidity in extremely cold environments, ensuring that the air heater can operate normally at a low temperature of -65℃, greatly expanding the use range of the air heater, especially in high latitudes or high altitude areas. The viscosity of the parking air heater oil is below 3.5, indicating that the oil is relatively easy to flow; the specific gravity is 0.87, which means that the density of the oil is slightly lower than that of water; the calorific value is 11,000 kcal, indicating that the oil has a higher combustion energy.

[0021] In terms of environmental protection, the special oil for parking air heaters does not contain aromatics, and does not produce toxic gases such as carbon dioxide during combustion, thereby reducing pollution to the environment and meeting current requirements for environmental protection and low-carbon emissions; in addition, since it does not contain sulfur and inorganic carbon, the gas produced by the oil after combustion is non-toxic, which greatly reduces the risk of carbon monoxide poisoning caused by incomplete combustion and improves user safety; it is highly clean and produces almost no carbon deposits, which reduces corrosion and wear on the internal components of the air heater, extends the service life of the equipment, and reduces maintenance costs; and its preparation process is simple, which is convenient for large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 A schematic diagram of the overall preparation process provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the special oil for the parking air heater provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Embodiment 1:

[0027] See also Figure 2, a parking air heater special oil, the parking air heater special oil is composed of C13-C14 isoparaffins, and the molecular structure of the C13-C14 isoparaffins contains at least one branched structure.

[0028] The specific implementation method is that the parking air heater special oil has the characteristics of high cleanliness, high calorific value, and high condensation point, and it is non-corrosive, sulfur-free, and carbon-free, and the gas generated by combustion has no toxic components.

[0029] C13-C14 isoalkanes have good solubility because they contain at least one branched structure in their molecular structure, which enables them to effectively dissolve oil and pigments when used as automotive fuel oil, which has a positive effect on improving fuel combustion efficiency and reducing engine carbon deposits; C13-C14 isoalkanes have low toxicity and low volatile organic compound emissions, which makes them more popular than traditional, harmful solvents; C13-C14 isoalkanes can improve the anti-knock performance of fuel, which is of great significance for improving engine efficiency and reducing knock phenomena; due to the low toxicity and low VOC emission characteristics of C13-C14 isoalkanes, The fast evaporation rate and non-toxic properties of C13-C14 isoalkanes make them ideal for clean applications, which helps reduce vehicle maintenance costs and improve fuel economy. Due to the branched chains in the molecular structure of C13-C14 isoalkanes, the parking air heater oil can still maintain good fluidity at -65°C, which is crucial to improving the performance of vehicles in cold environments. As automotive fuel oil, C13-C14 isoalkanes can form a protective layer on the surface of engine parts, reducing wear and extending engine life.

[0030] In summary, C13-C14 isoparaffin mixture as vehicle fuel oil can not only provide better combustion efficiency and power performance, but also reduce environmental pollution and improve the economy and reliability of vehicles.

[0031] Embodiment 2:

[0032] See also Figure 1 This embodiment provides a technical solution based on the first embodiment: a preparation process of a parking air heater oil, comprising:

[0033] S1. A petroleum fraction containing C10-C16 alkanes is selected as a raw material, and the raw material is subjected to deasphalting, desulfurization and denitrogenation steps; the deasphalting is performed by removing asphaltene through activated clay or alumina, and the desulfurization and denitrogenation are performed by removing sulfur and nitrogen through hydrogenation;

[0034] Raw material pretreatment is the first step in the entire process, and its purpose is to ensure that the raw materials can achieve the best results in subsequent treatments; if the moisture content is greater than 5%, the sample will become turbid and prone to sudden boiling during refining, so it is necessary to add anhydrous calcium chloride and then filter to reduce the moisture content.

[0035] Deasphalting is done by using activated clay or alumina. Activated clay needs to be activated in a constant temperature drying oven at 110°C for 2 hours before use to remove free water from the clay and increase the specific surface area of ​​its crystal lattice. The specific steps of deasphalting are as follows: weigh the pre-treated dehydrated crude oil and activated clay in a mass ratio of 100:2-5, heat the oil sample to 100°C, slowly add activated clay while stirring, adjust the heating amount to keep the oil temperature at 100±2°C, stir thoroughly for 30min~3h, turn off the heating jacket, stop stirring, filter and separate the activated clay, and obtain deasphalted crude oil.

[0036] Desulfurization and denitrification are carried out by hydrogenation. In this step, the raw material is oxidized in the presence of a catalyst, so that the sulfur-containing compounds and nitrogen-containing compounds in the deasphalted raw oil are selectively oxidized. A 5% carbon disulfide mass fraction n-hexane solution is selected as the sulfiding agent, and the volumetric space velocity (the volume ratio of the oil feed volume per hour to the sulfiding agent filling volume) is controlled to 20h -1 The hydrogen-to-oil volume ratio (the volume ratio of hydrogen flow rate to oil input in the same time period) is 400:1, and the preheating temperature is set to 140°C; sulfurization is carried out at three reaction temperatures of 250°C, 300°C and 350°C for 3 hours respectively; a micro-pressurized fixed bed device is used to ensure that there is no oxygen in the pressure vessel, and it is purged with nitrogen; after voltage stabilization, drying, purification, filtration and buffering, the hydrogen is preheated to 180°C in a preheater with the fraction pyrolysis oil to saturate the olefins, and then the gas-liquid two-phase enters the reactor, and a hydrogenation reaction occurs under the action of the catalyst.

[0037] After the reaction is completed, part of the gas in the gas-liquid separator is condensed by cooling water and collected in the bottom liquid sampler, and the non-condensable gas (including hydrogen sulfide and ammonia, etc.) is separated.

[0038] S2. Performing a catalytic isomerization reaction on the pretreated raw material to obtain a mixture of C13-C14 isoparaffins, wherein the sulfur content of the treated raw material is less than 0.05wt%, and the nitrogen content is less than 0.01wt%; the reaction temperature of the catalytic isomerization reaction is 200-400°C, the reaction pressure is 0.1-5MPa, and the reaction time is 1-10 hours. The solid acid catalyst used in the catalytic isomerization reaction is zeolite, alumina or silica; the catalytic isomerization reaction uses hydrogen as a co-reaction gas, and the volume ratio of hydrogen to the pretreated raw material is 1:5-20;

[0039] The raw materials must ensure that the sulfur content is less than 0.05wt% and the nitrogen content is less than 0.01wt% to meet environmental protection and reaction efficiency requirements.

[0040] Catalyst selection and preparation: Select solid acid catalysts such as zeolite, alumina or silica; these catalysts have excellent acidity and selectivity and can promote the isomerization reaction.

[0041] Hydrogen as a co-reaction gas: The volume ratio of hydrogen to the pretreated raw material is 1:5-20. This ratio can ensure that sufficient hydrogen participates in the reaction and promotes the isomerization reaction; the reaction temperature is 200-400°C, the reaction pressure is 0.1-5MPa, and the reaction time is 1-10h.

[0042] After the reaction is completed, the isomerization product is separated from the unreacted raw materials and catalyst by a separation system (such as a distillation tower) to obtain a C13-C14 isoparaffin mixture.

[0043] S3, separating and purifying the C13-C14 isoparaffin mixture by vacuum distillation to obtain purified C13-C14 isoparaffin; the vacuum distillation comprises: reducing the pressure in the distillation tower to within the range of 10 to 50 kPa, heating the C13-C14 isoparaffin mixture in the distillation tower, condensing the evaporated steam through a condenser, and collecting the condensed liquid;

[0044] The C13-C14 isoparaffin mixture in the distillation tower is heated so that the components in the mixture evaporate step by step according to different boiling points. The heating can be carried out by steam heating or electric heating. The top temperature of the tower is controlled at 140.0-142.3°C, the side line temperature is 158.2-160.4°C, and the bottom temperature is 174.9-176.3°C.

[0045] The evaporated steam is condensed through the condenser, and part of the condensate is returned to the top of the tower as reflux liquid, and the remaining distillate is the top product of the tower; the condenser can be water-cooled or air-cooled to ensure effective condensation of the steam, thereby obtaining purified C13-C14 isoparaffins.

[0046] S4, deep dewaxing treatment is performed on the purified C13-C14 isoparaffins to obtain C13-C14 isoparaffins, i.e., parking air heater oil; the solvent used in the dewaxing treatment is methyl ethyl ketone, and the temperature is -20°C;

[0047] The solvent used in the dewaxing process is methyl ethyl ketone (also known as 4-methyl-2-pentanone), an effective ketone solvent that dissolves waxes in the oil while retaining the desired isoparaffins.

[0048] The temperature of the dewaxing process is controlled at -20°C. At this temperature, the waxy components in the oil will crystallize out, while the isoparaffins will remain in liquid form, thus achieving effective separation of the two.

[0049] The purified C13-C14 isoparaffins are fully mixed with methyl ethyl ketone in a mixer, and then the temperature is gradually lowered to -20°C. During this process, it is necessary to ensure that the temperature drops evenly to promote the uniform crystallization of the wax; at -20°C, the wax in the mixture will precipitate in solid form. The solid wax is separated from the liquid isoparaffins by a filter.

[0050] S5. After the parking air heater special oil is tested for quality and qualified, it is packaged to obtain a parking air heater special oil finished product.

[0051] The specific implementation method is to check the appearance, color and transparency of the parking air heater oil to ensure that there are no impurities and abnormalities; ensure that there are clear markings on the product packaging, including product name, specifications, production date, batch number, etc.; test the sealing performance of the product container to ensure that there is no leakage; test the product's refrigeration / heat, refrigeration / heat consumption power, air supply volume and other key performance parameters to ensure that they meet technical requirements; safety performance test: including undervoltage protection, overvoltage protection, withstand voltage, insulation resistance and other safety performance tests to ensure product safety and reliability; conduct low temperature tests, high temperature tests, temperature cycles, temperature shocks and other environmental adaptability tests to ensure the product's stable performance in extreme environments.

[0052] Packaging steps: Before packaging, thoroughly clean and disinfect the packaging area and equipment to prevent contamination; select suitable packaging materials such as barrels, bottles or cans according to the characteristics and requirements of the product, and ensure the sealing and protectiveness of the packaging materials; use automated filling equipment to fill qualified parking air heater oil into the packaging container to ensure the accuracy and consistency of the filling process; seal the packaging container to ensure the integrity and reliability of the seal; affix product labels, including product name, specifications, production date, batch number, shelf life and other information; print or affix quality traceability codes on the packaging for product tracking and quality control; conduct a final inspection of the packaged products, including the integrity of the packaging, the correctness of the label and the sealing of the product; store the packaged products in a suitable environment to avoid high temperature, direct sunlight and humidity; ensure product safety during transportation.

[0053] Embodiment three:

[0054] This embodiment provides a technical solution based on the second embodiment: the parking air heater oil prepared by the preparation process of the second embodiment is subjected to relevant performance tests.

[0055] The inspection and testing agency is Shanghai Chemical Industry Research Institute Testing Co., Ltd.; the inspection methods and procedures are JT / T617-2018 "Dangerous Goods Road Transport Rules" Part 2 and 3. The specific test results are as follows:

[0056] Appearance and smell of parking air heater oil: colorless and transparent liquid, no odor;

[0057] Parking air heater oil is not explosive;

[0058] Parking air heater oil is not flammable, and its closed cup flash point is higher than 60°C, so it cannot be classified as a flammable liquid.

[0059] Parking air heater oil does not belong to oxidants and organic peroxides;

[0060] Parking air heater oil is not infectious or toxic;

[0061] The parking air heater oil does not have radioactive hazards;

[0062] The parking air heater oil does not have any corrosive hazards;

[0063] Parking air heater oil does not have other hazards.

[0064] In summary, parking air heater oil does not belong to any dangerous goods category during transportation, so it can be transported by road as ordinary goods.

[0065] Embodiment 4:

[0066] This embodiment provides a technical solution based on the first embodiment: an enterprise standard for special oil for parking air heater.

[0067] 1. Scope

[0068] This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, shelf life and other aspects of special oil for air heating.

[0069] This standard is applicable to the air-heating oil developed and produced by our company. It is the main technical basis for the design, manufacture, use, quality inspection and formulation of various technical standards and technical documents of our company's air-heating oil products and the signing of relevant contracts with customers.

[0070] 2. Normative references

[0071] The following documents are essential for the application of this document. For any referenced document with a date, only the version with the date is applicable to this document. For any referenced document without a date, the latest version (including all amendments) is applicable to this document.

[0072] GB / T 259 Determination of water-soluble acids and bases in petroleum products.

[0073] GB / T 261 Determination of flash point - Pensky-Martin closed cup method.

[0074] GB / T 265 Method for determination of kinematic viscosity and calculation of dynamic viscosity of petroleum products.

[0075] GB / T 507 Refractory material compressive creep test method.

[0076] GB / T 511 Petroleum, petroleum products and additives - Determination of mechanical impurities.

[0077] GB / T 1884 Laboratory determination of density of crude oil and liquid petroleum products (density meter method).

[0078] GB / T 1885 Petroleum meter.

[0079] GB / T 3535 Method for determining pour point of petroleum products.

[0080] GB / T 3536 Determination of flash point and fire point of petroleum products - Cleveland open cup method.

[0081] GB / T 4756 Manual sampling method for petroleum liquids.

[0082] GB / T 5096 Petroleum products copper strip corrosion test method.

[0083] GB / T 5654 Measurement of relative permittivity, dielectric loss factor and DC resistivity of liquid insulating materials.

[0084] GB / T 6541 Petroleum products - Determination of interfacial tension of oil against water (ring method).

[0085] GB / T 7600 Determination of moisture content of transformer oil and turbine oil in service (coulometric method).

[0086] SH 0164 Rules for packaging, storage, transportation and delivery acceptance of petroleum products.

[0087] SH IT 0689 Determination of total sulfur content of light hydrocarbons, motor fuels and other oil products (ultraviolet fluorescence method).

[0088] SH / T 0802 Determination of 2,6-di-tert-butyl-p-cresol in insulating oil.

[0089] SH / T 0804 Electrical insulating oil corrosive sulfur test silver sheet test method.

[0090] NB / SH / T 0006 Naphthalene nitrate test method.

[0091] NB / SH / T 0810 Determination of gas evolution of insulating liquid under electric field and ionization. NB / SH / T 0812 Determination of 2-furfural and related components in mineral insulating oil. NB / SH / T 0836 Determination of acid value of insulating oil by automatic potentiometric titration. NB / SH / T0966 Determination of aromatic content in white oil by ultraviolet spectrophotometry.

[0092] 3. Technical requirements

[0093] The product should comply with the requirements in Table 1.

[0094] Table 1

[0095]

[0096] 4. Test methods

[0097] 4.1 Test conditions

[0098] Unless otherwise specified, all tests shall be carried out under the following conditions:

[0099] a) Temperature: 15℃-35℃:

[0100] b)Relative humidity: 25%-75%:

[0101] c) Atmospheric pressure: 86kPa-106kPa

[0102] 4.2 Appearance inspection

[0103] Using the visual method, when observed at room temperature (23+2)℃, it should be a colorless, odorless, non-fluorescent transparent liquid with no precipitation.

[0104] 4.3 Kinematic viscosity

[0105] Carry out the test in accordance with the provisions of GB / T 265.

[0106] 4.4 Flash Point

[0107] Carry out the test in accordance with the provisions of GB / T 261.

[0108] 4.5 Pour point

[0109] Carry out the test in accordance with the provisions of GB / T 3535.

[0110] 4.6 Acid value

[0111] The test shall be carried out in accordance with the provisions of NB / SH / T 0836.

[0112] 4.7 Total sulfur content

[0113] Carry out the test according to the provisions of SH / T 0689.

[0114] 4.8 Corrosive sulfur

[0115] Carry out the test according to the provisions of SH / T 0804.

[0116] 4.9. Aromatic content

[0117] The test shall be carried out in accordance with the provisions of NB / SH / T 0966.

[0118] 4.10 Water content

[0119] Carry out the test in accordance with the provisions of GB / T 7600.

[0120] 4.11 Mechanical impurities

[0121] Carry out the test according to the provisions of GB / T 511.

[0122] 4.12 Water-soluble acids or bases

[0123] Carry out the test in accordance with the provisions of GB / T 259.

[0124] 4.13 Nitronaphthalene

[0125] The test shall be carried out in accordance with the provisions of NB / SH / T 0006.

[0126] 4.14 Breakdown voltage

[0127] Carry out the test in accordance with the provisions of GB / T 507.

[0128] 4.15 Density

[0129] The test shall be carried out in accordance with the provisions of GB / T 1884 and GB / T 1885.

[0130] 4.16 Dielectric loss factor

[0131] Carry out the test in accordance with the provisions of GB / T 5654.

[0132] 4.17 Interfacial tension

[0133] Carry out the test according to the provisions of GB / T 6541.

[0134] 4.18. Antioxidant additive content

[0135] The test shall be carried out in accordance with the provisions of SH / T 0802.

[0136] 4.19, 2-furfural content

[0137] Carry out the test according to the requirements of NB / SH / T 0812.

[0138] 4.20. Gas evolution

[0139] Carry out the test according to the requirements of NB / SH / T 0810.

[0140] 5. Inspection rules

[0141] 5.1 Batch

[0142] A batch number refers to a batch of homogeneous products produced by uniformly mixing the same batch of raw materials, within the same production cycle, under the same production conditions, using the same mixing equipment before filling.

[0143] 5.2 Sampling

[0144] Products produced with the same batch of raw materials and the same process are considered as one batch. The quantity of each batch shall not exceed 50t. Sampling shall be carried out in accordance with the provisions of GB / T4756. The total sampling volume shall not be less than 1000ml and shall be placed in two containers, one for test and the other for retention.

[0145] 5.3 Factory Inspection

[0146] The user unit may conduct acceptance according to the provisions of this standard to check whether the quality meets the requirements of the standard.

[0147] 5.4 Formal Inspection

[0148] Type inspection items include all items specified in this standard. Under normal production conditions, it is carried out once when the product is first put on the market. It should also be carried out in the following cases:

[0149] a) During trial production and appraisal of new products;

[0150] b) When changing the main raw and auxiliary materials or the key process;

[0151] c) When the test results of this time are significantly different from the results of the previous type test;

[0152] d) When the national quality department makes requirements on the product.

[0153] 5.5 Judgment Rules

[0154] If one or more indicators in the test results do not meet the requirements of this standard, double sampling can be carried out from the same batch of products for re-inspection. If unqualified items are still found in the re-inspection, the batch of products will be judged as unqualified.

[0155] 6. Marking, packaging, transportation and storage

[0156] 6.1 Logo

[0157] Labels and instructions should comply with the relevant provisions of SH 0164.

[0158] 6.2 Packaging

[0159] The packaging should comply with the relevant provisions of SH0164.

[0160] 6.3 Transportation

[0161] The product should be handled with care during transportation, avoid heavy pressure and inversion, and protect it from rain and sun. Open flames are strictly prohibited.

[0162] 6.4 Storage

[0163] The product should be stored in a ventilated and dry warehouse and isolated from fire sources.

[0164] 6.5 Shelf life

[0165] Under the prescribed transportation and storage conditions, and provided the product packaging is intact and unopened, the shelf life shall be as indicated on the sales packaging.

[0166] Only certain exemplary embodiments of the present invention have been described by way of illustration. It is undoubted that the described embodiments may be modified in various ways by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A parking air heater oil, characterized in that: The parking air heater oil is composed of C13-C14 isoparaffins, and the molecular structure of the C13-C14 isoparaffins contains at least one branched structure.

2. A preparation process for parking air heater oil, characterized in that: include: S1. Selecting a petroleum fraction containing C10-C16 alkanes as a raw material and pretreating the raw material; S2, performing a catalytic isomerization reaction on the pretreated raw material to obtain a mixture of C13-C14 isoparaffins; S3, separating and purifying the mixture of C13-C14 isoparaffins by a vacuum distillation process to obtain purified C13-C14 isoparaffins; S4, deep dewaxing the purified C13-C14 isoparaffins to obtain C13-C14 isoparaffins, i.e., parking air heater oil; S5. After the parking air heater special oil is tested for quality and qualified, it is packaged to obtain a parking air heater special oil finished product.

3. The preparation process of the parking air heater oil according to claim 2, characterized in that: S1 The pretreatment includes deasphalting, desulfurization and denitrification steps.

4. The preparation process of the parking air heater oil according to claim 3, characterized in that: The deasphalting is performed by using activated clay or alumina to remove asphaltene, and the desulfurization and denitrification are performed by using hydrogenation to remove sulfur and nitrogen.

5. The preparation process of the parking air heater oil according to claim 2, characterized in that: S2 The sulfur content of the raw material after the treatment is lower than 0.05wt%, and the nitrogen content is lower than 0.01wt%.

6. The preparation process of the parking air heater oil according to claim 2, characterized in that: S2 The reaction temperature of the catalytic isomerization reaction is 200-400°C, the reaction pressure is 0.1-5MPa, the reaction time is 1-10 hours, and the solid acid catalyst used in the catalytic isomerization reaction is zeolite, alumina or silica.

7. The preparation process of the parking air heater oil according to claim 2, characterized in that: S2 The catalytic isomerization reaction uses hydrogen as a co-reaction gas, and the volume ratio of hydrogen to the pretreated raw material is 1:5-20.

8. The preparation process of the parking air heater oil according to claim 2, characterized in that: S3 The vacuum distillation comprises: reducing the pressure in the distillation tower to within the range of 10 to 50 kPa, heating the C13-C14 isoparaffin mixture in the distillation tower, condensing the evaporated steam through a condenser, and collecting the condensed liquid.

9. The preparation process of the parking air heater oil according to claim 2, characterized in that: The solvent used in the dewaxing treatment in S4 is methyl ethyl ketone.

10. The preparation process of the parking air heater oil according to claim 2, characterized in that: The temperature of the dewaxing treatment in S4 is -20°C.

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