Process for esterification of fischer-tropsch wax, esterified fischer-tropsch wax, refined fischer-tropsch wax, end product

Abstract

The present application relates to a kind of esterification method of Fischer-Tropsch wax, esterification Fischer-Tropsch wax, refined Fischer-Tropsch wax, end product, specifically to Fischer-Tropsch wax technical field, the esterification method includes: the esterification of oxidized Fischer-Tropsch wax, alcohol raw material and organic metal catalyst in oxidizing atmosphere, obtains esterification Fischer-Tropsch wax;The organic metal catalyst includes: cobalt acetate, cobalt acetylacetone, manganese acetate, manganese acetylacetone or titanium acid isopropyl ester one or the combination of at least two of them.The esterification method provided by the present application, by using specific esterification process, the color of the obtained esterification wax is significantly lighter, and the esterification effect is also improved, which is beneficial to improve the use effect of esterification wax, and can be widely used in cosmetic, metal processing fluid, polishing emulsion, glazing wax, defoaming agent, stent fluid, PVC lubricant and other fields.

Description

Technical Field

[0001] This invention relates to the field of Fischer-Tropsch wax technology, specifically to an esterification method for Fischer-Tropsch wax, esterified Fischer-Tropsch wax, refined Fischer-Tropsch wax, and end products. Background Technology

[0002] Currently, Fischer-Tropsch waxes and their derivatives are widely used in cosmetics, metalworking fluids, emulsified waxes, polishing waxes, defoamers, support fluids, PVC lubricants and other fields due to their excellent properties.

[0003] However, with the development of various industries and their demand for specialty waxes, the method of modifying Fischer-Tropsch wax to obtain modified waxes with higher added value has received widespread attention. Currently commonly used modification methods include: oxidation modification, esterification modification, acidification modification, and amidation modification.

[0004] For example, CN217103745U discloses an apparatus and system for one-step preparation of esterified wax using Fischer-Tropsch wax. The apparatus includes: a reactor, which is provided with a first inlet, a second inlet, an oxygen inlet for inputting oxygen, a product outlet for outputting the product, and a material outlet for recycling; a Fischer-Tropsch wax preheater for heating Fischer-Tropsch wax; an esterified material preheater for heating esterified material; and a condenser separator, which is provided with a circulating inlet, a circulating outlet, and a circulating material outlet. The Fischer-Tropsch wax preheater is connected to the reactor through the first inlet and the reactor through the second inlet. The circulating inlet is connected to the outlet, the circulating outlet is connected to the oxygen inlet, and the circulating material outlet is connected to the Fischer-Tropsch wax preheater.

[0005] CN112125990A discloses a method for esterification modification of wax, including an oxidation step of wax and an esterification step of oxidized wax. The wax oxidation step includes: adding an oxidation catalyst to the wax, introducing air, and then heating to 140-160℃ to carry out an oxidation reaction to obtain oxidized wax. The esterification step of oxidized wax includes: adding an alcohol, an esterification catalyst, and a dehydrating agent to the oxidized wax, and heating to 110-130℃ under a protective atmosphere to carry out an esterification reaction.

[0006] However, when performing esterification modification, a catalyst is usually needed to improve the esterification effect. However, when performing esterification, since the esterification modification of Fischer-Tropsch wax is different from the traditional alcohol-esterification, the synthesized ester is dark red in color and cannot be purified to obtain a light-colored product. At the same time, the esterification effect is also poor. Summary of the Invention

[0007] In view of the problems existing in the prior art, the purpose of the present invention is to provide an esterification method for Fischer-Tropsch wax, esterified Fischer-Tropsch wax, refined Fischer-Tropsch wax, and end products, so as to solve the defects of poor color and low esterification rate of esterified Fischer-Tropsch wax.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] In a first aspect, the present invention provides an esterification method for Fischer-Tropsch wax, the esterification method comprising:

[0010] Oxidized Fischer-Tropsch wax, alcohol feedstock and organometallic catalyst are esterified in an oxidizing atmosphere to obtain esterified Fischer-Tropsch wax.

[0011] The organometallic catalyst includes one or a combination of at least two of cobalt acetate, cobalt acetylacetonate, manganese acetate, manganese acetylacetonate, or isopropyl titanate.

[0012] The esterification method provided by this invention, through a specific esterification process, results in a significantly lighter color of the esterified wax, while also improving the esterification effect. This enhances the performance of the esterified wax and makes it widely applicable in cosmetics, metalworking fluids, polishing emulsions, varnishes, defoamers, support fluids, PVC lubricants, and other fields.

[0013] As a preferred embodiment of the present invention, the oxidized Fischer-Tropsch wax is obtained by oxidizing Fischer-Tropsch wax.

[0014] Preferably, the Fischer-Tropsch wax comprises one or a combination of at least two of the following: 70# Fischer-Tropsch wax, 95# Fischer-Tropsch wax, 100# Fischer-Tropsch wax, 105# Fischer-Tropsch wax, 110# Fischer-Tropsch wax, or 115# Fischer-Tropsch wax.

[0015] As a preferred embodiment of the present invention, the acid value of the oxidized Fischer-Tropsch wax is 15-45 mgKOH / g.

[0016] Preferably, the oxidized Fischer-Tropsch wax is subjected to distillation to remove light components.

[0017] As a preferred technical solution of the present invention, the alcohol raw material includes one or a combination of at least two of fatty alcohols, polyol compounds or alcohol ethers.

[0018] Preferably, the oxidizing atmosphere includes an atmosphere containing oxygen.

[0019] As a preferred embodiment of the present invention, the molar ratio of the carboxyl group in the Fischer-Tropsch oxidized wax to the hydroxyl group in the alcohol raw material is (1-1.15):1.

[0020] As a preferred embodiment of the present invention, the amount of the organometallic catalyst added is 1-10‰ of the total mass of the Fischer-Tropsch wax and alcohol raw materials.

[0021] As a preferred embodiment of the present invention, the esterification temperature is 130-180℃.

[0022] Preferably, the esterification time is 1-9 hours.

[0023] In a second aspect, the present invention provides an esterified Fischer-Tropsch wax, which is prepared by the esterification method described in the first aspect.

[0024] Thirdly, the present invention provides a refined Fischer-Tropsch wax, which is obtained by decolorizing the esterified Fischer-Tropsch wax as described in the second aspect.

[0025] Fourthly, the present invention provides an end product comprising: esterified Fischer-Tropsch wax as described in the second aspect, and / or refined Fischer-Tropsch wax as described in the third aspect.

[0026] Compared with existing technical solutions, the present invention has the following beneficial effects:

[0027] The esterification method provided by this invention achieves catalytic oxidative esterification under an oxidizing atmosphere by employing a specific catalyst. The presence of oxygen facilitates the dehydration of carboxyl and hydroxyl groups, while the organometallic catalyst acts as an oxygen carrier, transferring oxygen to these groups and thus promoting the completion of the esterification reaction. Of course, not all the oxygen transported by the "metal ions" completes the esterification reaction; it only partially promotes esterification, while the remaining oxygen oxidizes the wax, thereby increasing the esterification rate and ensuring efficient decolorization of the esterified wax.

[0028] The present invention will now be described in further detail. However, the examples described below are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims. Detailed Implementation

[0029] To better illustrate the present invention and facilitate understanding of its technical solutions, typical but non-limiting embodiments of the present invention are as follows:

[0030] With the development of various industries and their increasing demand for specialty waxes, methods for modifying Fischer-Tropsch waxes to obtain modified waxes with higher added value have received widespread attention. Currently, commonly used modification methods include oxidation modification, esterification modification, acidification modification, and amidation modification. However, esterification modification usually requires the use of a catalyst to enhance the esterification effect. However, during esterification, because the esterification modification of oxidized Fischer-Tropsch wax differs from traditional alkyd-esterification, the synthesized ester is dark red in color, making it impossible to obtain a light-colored product through refining, and the esterification effect is also poor. Therefore, this invention optimizes the esterification process, significantly improving the color of the esterified wax and achieving a higher esterification rate, as detailed below:

[0031] I. This embodiment provides an esterification method for Fischer-Tropsch wax, the esterification method comprising:

[0032] Oxidized Fischer-Tropsch wax, alcohol feedstock, and organometallic catalyst are esterified under an oxidizing atmosphere to obtain esterified Fischer-Tropsch wax.

[0033] In this invention, the oxidized Fischer-Tropsch wax can be a commercially available product or an oxidized wax obtained by oxidizing Fischer-Tropsch wax according to existing technology, such as the oxidized Fischer-Tropsch wax obtained by oxidizing Fischer-Tropsch wax.

[0034] The Fischer-Tropsch wax includes one or a combination of at least two of the following: 70# Fischer-Tropsch wax, 95# Fischer-Tropsch wax, 100# Fischer-Tropsch wax, 105# Fischer-Tropsch wax, 110# Fischer-Tropsch wax, or 115# Fischer-Tropsch wax.

[0035] In this invention, the combination of Fischer-Tropsch waxes can be selected as a combination of 70# Fischer-Tropsch wax and 95# Fischer-Tropsch wax, a combination of 100# Fischer-Tropsch wax and 105# Fischer-Tropsch wax, or a combination of 110# Fischer-Tropsch wax and 115# Fischer-Tropsch wax.

[0036] The acid value of the oxidized Fischer-Tropsch wax is 15-45 mgKOH / g, for example, it can be 15 mgKOH / g, 18 mgKOH / g, 21 mgKOH / g, 24 mgKOH / g, 27 mgKOH / g, 30 mgKOH / g, 33 mgKOH / g, 36 mgKOH / g, 39 mgKOH / g, 42 mgKOH / g or 45 mgKOH / g, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0037] The Fischer-Tropsch oxidized wax is subjected to distillation to remove light components.

[0038] In this invention, the method of removing light components by distillation includes: molecular distillation; the conditions for removing light components by molecular distillation are: temperature of 120℃-180℃, vacuum degree of 5-50Pa; the amount of light removal reagent (at least one or a combination of at least two of molecular sieve, activated clay or activated carbon) is 0.1-20% of the Fischer-Tropsch oxidized wax, and the adsorption temperature is 2-100℃ higher than the melting temperature; stirring is carried out for 10-60 minutes under an inert atmosphere, followed by heat preservation and filtration to obtain refined oxidized wax.

[0039] In this invention, the inert atmosphere includes atmospheres such as nitrogen, helium, neon, or argon that do not affect the removal of light energy, and one or a combination of at least two can be selected.

[0040] The alcohol raw materials include one or a combination of at least two of the following: fatty alcohols, polyol compounds, or alcohol ethers.

[0041] In this invention, the combination of alcohol raw materials can be selected as a combination of fatty alcohols and polyol compounds, or a combination of polyol compounds and alcohol ethers, etc.

[0042] In this invention, the fatty alcohol may be lauryl alcohol and / or cetyl alcohol.

[0043] In this invention, the polyol compounds include one or a combination of at least two of diols, triols, tetraols, and pentaols.

[0044] In this invention, the diol may be selected from one or a combination of at least two of ethylene glycol, propylene glycol, butanediol, pentanediol, or hexanediol.

[0045] In this invention, the triol may be selected as one or a combination of at least two of glycerol, trimethylolpropane, etc.

[0046] In this invention, the tetraol can be selected from pentaerythritol, etc.

[0047] In this invention, the polyol compound may be selected as one or a combination of at least two of the following: diol, glycerol, trimethylolpropane, pentaerythritol or pentaerythritol monostearate.

[0048] In this invention, the alcohol ether can be one or a combination of at least two of triethylene glycol, PEG-300, PEG-400, AEO-3, AEO-7 or AEO-9.

[0049] The oxidizing atmosphere includes an atmosphere containing oxygen.

[0050] In this invention, the oxygen-containing atmosphere can be air, or an oxygen-containing atmosphere prepared by using oxygen and other inert atmospheres.

[0051] The molar ratio of the carboxyl group to the hydroxyl group in the Fischer-Tropsch oxidized wax is (1-1.15):1, for example, it can be 1:1, 1:1.01, 1:1.02, 1:1.03, 1:1.04, 1:1.05, 1:1.06, 1:1.07, 1:1.08, 1:1.09, 1:1.1, 1:1.11, 1:1.12, 1:1.13, 1:1.14 or 1:1.15, etc., but is not limited to the listed values. Other unlisted values ​​within this range also meet the requirements.

[0052] The organometallic catalyst includes one or a combination of at least two of the following: cobalt acetate, cobalt acetylacetonate, manganese acetate, manganese acetylacetonate, or isopropyl titanate.

[0053] In this invention, the combination of organometallic catalysts can be selected as a combination of cobalt acetate and manganese acetate, a combination of manganese acetylacetonate and isopropyl titanate, a combination of cobalt acetylacetonate and isopropyl titanate, etc.

[0054] The amount of the organometallic catalyst added is 1-10‰ of the total mass of the Fischer-Tropsch wax and alcohol raw materials, for example, it can be 1‰, 1.9‰, 2.8‰, 3.7‰, 4.6‰, 5.5‰, 6.4‰, 7.3‰, 8.2‰, 9.1‰ or 10‰, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0055] The esterification temperature is 130-180℃, for example, it can be 130℃, 135℃, 140℃, 145℃, 150℃, 155℃, 160℃, 165℃, 170℃, 175℃ or 180℃, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0056] The esterification time is 1-9 hours, for example, it can be 1 hour, 1.8 hours, 2.6 hours, 3.4 hours, 4.2 hours, 5 hours, 5.8 hours, 6.6 hours, 7.4 hours, 8.2 hours or 9 hours, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0057] II. This embodiment provides an esterified Fischer-Tropsch wax, which is prepared by an esterification method.

[0058] III. This embodiment provides a refined Fischer-Tropsch wax, which is obtained by decolorizing esterified Fischer-Tropsch wax.

[0059] In this invention, the decolorization process includes: sequential alkaline washing, bleaching, water washing, dehydration, and decolorization.

[0060] In this invention, alkaline washing refers to cleaning the esterified Fischer-Tropsch wax with an alkaline solution. The alkaline solution used includes sodium hydroxide solution and / or potassium hydroxide solution, with a concentration of 10-30%, for example, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, or 30%, etc. The amount of alkaline solution used is 1.05-1.15 times the molar amount of metal ions in the esterified Fischer-Tropsch wax, for example, 1.05 times, 1.06 times, 1.07 times, 1.08 times, 1.09 times, 1.1 times, 1.11 times, 1.12 times, 1.13 times, 1.1 times, etc. The washing temperature is 95-110℃, such as 4 times or 1.15 times, for example, 95℃, 96.5℃, 98℃, 99.5℃, 101℃, 102.5℃, 104℃, 105.5℃, 107℃, 108.5℃ or 110℃, and the time is 30-60min, such as 30min, 33min, 36min, 39min, 42min, 45min, 48min, 51min, 54min, 57min or 60min, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0061] In this invention, bleaching refers to bleaching esterified Fischer-Tropsch wax with a bleaching agent. The amount of bleaching agent used is 5-200% of the mass of the esterified Fischer-Tropsch wax, for example, it can be 5%, 24.5%, 44%, 63.5%, 83%, 102.5%, 122%, 141.5%, 161%, 180.5%, or 200%, etc. The bleaching agent includes: bleaching powder and / or sodium hypochlorite solution; the mass concentration of sodium hypochlorite solution is 5-10%, for example, it can be 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10%, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0062] In this invention, water washing refers to cleaning the esterified Fischer-Tropsch wax with water.

[0063] In this invention, dehydration can be achieved by means of negative pressure dehydration or nitrogen blowing.

[0064] In this invention, decolorization refers to treating esterified Fischer-Tropsch wax with a decolorizing agent. The decolorizing agent includes activated clay and / or activated carbon. The amount of decolorizing agent used is 1-20% of the mass of esterified Fischer-Tropsch wax, for example, it can be 1%, 2.9%, 4.8%, 6.7%, 8.6%, 10.5%, 12.4%, 14.3%, 16.2%, 18.1% or 20%, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0065] IV. This embodiment provides a terminal product, which includes: esterified Fischer-Tropsch wax, and / or refined Fischer-Tropsch wax.

[0066] In this invention, the end product refers to cosmetics, metalworking fluids, polishing emulsions, varnishes, defoamers, support fluids, PVC lubricants, etc., containing esterified Fischer-Tropsch wax and / or refined Fischer-Tropsch wax.

[0067] V. To illustrate the esterification effect achievable by the esterification method for Fischer-Tropsch wax provided by this invention, the following example is used for explanation:

[0068] In the following example, the relevant indicators of the product were tested as follows:

[0069] The acid value was determined according to GB / T 264-1983, the method for determining the acid value of petroleum products.

[0070] Ester value = Saponification value - Acid value; Saponification value is determined according to GB / T 8021-2003, the method for determining the saponification value of petroleum products.

[0071] The esterification rate is calculated by the ratio of the hydroxyl values ​​of the alcohol raw material before and after the reaction: the hydroxyl value is determined according to HG / T2709-2022; esterification rate = measured hydroxyl value / hydroxyl value of alcohol raw material × 100%.

[0072] Colorimetry was obtained using a QSG iron-cobalt colorimeter.

[0073] The penetration was determined according to GB / T 4985-2021 "Petroleum wax penetration test method".

[0074] Example 1

[0075] This embodiment provides an esterification method for oxidized Fischer-Tropsch wax, as detailed below:

[0076] Oxidized Fischer-Tropsch wax OCT-28 (Inner Mongolia Yuanji Chemical Co., Ltd.) was purified by molecular distillation at an evaporation temperature of 145℃, a vacuum of 55Pa, a feed pump speed of 20r / min, a stirring speed of 35r / min, and a heat-preserving oil bath temperature of 130℃.

[0077] The acid value of the raw material, Fischer-Tropsch oxidized wax OCT-28, is 29 mg KOH / g, and the penetration is 14 (25℃, 0.1 mm).

[0078] 1.7% of light substances were removed, and the acid value was 73.2 mg KOH / g;

[0079] The refined oxidized wax after light removal has an acid value of 26.3 mg KOH / g and a penetration of 11 (25℃, 0.1 mm).

[0080] 260g of refined oxidized wax and 4g of ethylene glycol (industrial grade, 99%) were added to a four-necked flask. The molar ratio of the carboxyl group of the refined oxidized wax to the hydroxyl group of the ethylene glycol was 1:1. 1g of cobalt acetate was added as the organometallic catalyst. The air flow rate was 400mL / min, the stirring speed was 650r / min, and the reaction was carried out at 145℃ for 4h to obtain esterified Fischer-Tropsch wax.

[0081] Example 2

[0082] Take 260g of the refined oxidized wax from Example 1, 24g of PEG-400 (industrial grade, 99%) as the alcohol raw material, at which point the molar ratio of the carboxyl group of the refined oxidized wax to the hydroxyl group of PEG-400 is 1:1, and 2g of manganese acetylacetone as the metal catalyst. Add them to a four-necked flask, with an air flow rate of 700mL / min and a stirring speed of 650r / min. React at 145℃ for 6h to obtain esterified Fischer-Tropsch wax.

[0083] Example 3

[0084] The only difference from Example 1 is that the alcohol used is lauryl alcohol and the organometallic catalyst is cobalt acetylacetonate.

[0085] Example 4

[0086] The only difference from Example 1 is that the alcohol used is glycerol and the organometallic catalyst is cobalt acetate.

[0087] Example 5

[0088] The only difference from Example 1 is that the alcohol used is pentaerythritol monostearate and the organometallic catalyst is manganese acetylacetone.

[0089] Example 6

[0090] The only difference from Example 1 is that the alcohol used is PEG-400; the organometallic catalyst is isopropyl titanate, with an amount of 1.5‰; the reaction temperature is 160℃, and the reaction time is 6h.

[0091] Example 7

[0092] The only difference from Example 1 is that the alcohol used is AEO-7; the organometallic catalyst is isopropyl titanate, with an amount of 1.5‰; the reaction temperature is 160°C, and the reaction time is 6 hours.

[0093] Example 8

[0094] The only difference from Example 1 is that the amount of the organometallic catalyst added is 0.5‰ of the total mass of the Fischer-Tropsch wax and alcohol raw materials, and the amount of organometallic catalyst can be reduced accordingly.

[0095] Example 9

[0096] The only difference from Example 1 is that the amount of the organometallic catalyst added is 15‰ of the total mass of the Fischer-Tropsch wax and alcohol raw materials, and the amount of organometallic catalyst can be increased accordingly.

[0097] Example 10

[0098] The only difference from Example 1 is that molecular distillation purification is not performed.

[0099] Comparative Example 1

[0100] The only difference from Example 1 is that no air is introduced during the esterification process.

[0101] Comparative Example 2

[0102] The only difference from Example 1 is that cobalt acetate is replaced with an equal amount of cobalt nitrate.

[0103] Comparative Example 3

[0104] The only difference from Example 1 is that cobalt acetate is replaced with an equal amount of p-toluenesulfonic acid.

[0105] Comparative Example 4

[0106] The only difference from Example 1 is that cobalt acetate is replaced with an equal amount of dodecylbenzenesulfonic acid.

[0107] Comparative Example 5

[0108] The only difference from Example 1 is that cobalt acetate is replaced with an equal amount of iron acetate.

[0109] The performance of the esterified waxes obtained in the above examples and comparative examples was tested, and the results are shown in Table 1 below.

[0110] Table 1

[0111]

[0112] The esterified waxes obtained in the above examples and comparative examples were subjected to decolorization treatment, as follows:

[0113] Take 100g of esterified Fischer-Tropsch wax and add it to a 250mL three-necked flask. Melt it at 100℃ and maintain it at 100℃. Add 1mL of 10% sodium hydroxide solution dropwise and stir for 30min. Then slowly add 20g of 5% sodium hypochlorite solution dropwise and stir for 30min. Dehydrate under negative pressure for 15min. Add 10g of activated carbon (Green Forest, iodine value 800) and continue stirring for 30min. Keep warm and filter to obtain refined esterified Fischer-Tropsch wax.

[0114] The properties of the refined esterified Fischer-Tropsch wax are detailed in Table 2 below.

[0115] Table 2

[0116]

[0117] As shown in Tables 1 and 2, the esterification method provided by this invention achieves catalytic oxidative esterification under an oxidizing atmosphere by using a specific catalyst. The presence of oxygen facilitates the dehydration of carboxyl and hydroxyl groups, and the organometallic catalyst can act as an oxygen carrier to transfer oxygen to the aforementioned groups, thereby promoting the completion of the esterification reaction. Of course, not all the oxygen transported by the "metal ions" completes the esterification reaction; it only partially promotes esterification, while the remaining oxygen oxidizes the wax, thus increasing the esterification rate and ensuring that the esterified wax can achieve efficient decolorization. Specifically, the esterification rate is ≥83.2%, and the penetration (25℃, 1mm) is ≤17.1. In the preferred embodiment, the esterification rate is ≥94.4%, and the penetration (25℃, 1mm) is ≤10.4.

[0118] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0119] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0120] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A method for esterifying Fischer-Tropsch wax, characterized in that, The esterification method includes: Oxidized Fischer-Tropsch wax, alcohol feedstock and organometallic catalyst are esterified in an oxidizing atmosphere to obtain esterified Fischer-Tropsch wax. The organometallic catalyst includes one or a combination of at least two of cobalt acetate, cobalt acetylacetonate, manganese acetate, manganese acetylacetonate, or isopropyl titanate.

2. The esterification method according to claim 1, characterized in that, The oxidized Fischer-Tropsch wax is obtained by oxidizing Fischer-Tropsch wax; Preferably, the Fischer-Tropsch wax comprises one or a combination of at least two of the following: 70# Fischer-Tropsch wax, 95# Fischer-Tropsch wax, 100# Fischer-Tropsch wax, 105# Fischer-Tropsch wax, 110# Fischer-Tropsch wax, or 115# Fischer-Tropsch wax.

3. The esterification method according to claim 1, characterized in that, The acid value of the oxidized Fischer-Tropsch wax is 15-45 mg KOH / g; Preferably, the oxidized Fischer-Tropsch wax is subjected to distillation to remove light components.

4. The esterification method according to claim 1, characterized in that, The alcohol raw materials include: one or a combination of at least two of fatty alcohols, polyol compounds, or alcohol ethers; Preferably, the oxidizing atmosphere includes an atmosphere containing oxygen.

5. The esterification method according to claim 1, characterized in that, The molar ratio of carboxyl groups to hydroxyl groups in the oxidized Fischer-Tropsch wax is (1-1.15):

1.

6. The esterification method according to claim 1, characterized in that, The amount of the organometallic catalyst added is 1-10‰ of the total mass of the Fischer-Tropsch wax and alcohol raw materials.

7. The esterification method according to claim 1, characterized in that, The esterification temperature is 130-180℃; Preferably, the esterification time is 1-9 hours.

8. An esterified Fischer-Tropsch wax, characterized in that, The esterified Fischer-Tropsch wax was prepared by the esterification method as described in any one of claims 1-7.

9. A refined Fischer-Tropsch wax, characterized in that, The refined Fischer-Tropsch wax is obtained by decolorizing the esterified Fischer-Tropsch wax as described in claim 8.

10. A terminal product, characterized in that, The end products include: esterified Fischer-Tropsch wax as described in claim 8, and / or refined Fischer-Tropsch wax as described in claim 9.

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