A fatty alcohol polyetheramine polyether and its preparation method and application

Abstract

The present invention belongs to the technical field of organic polymer compound preparation and discloses a fatty alcohol polyetheramine polyether, a preparation method, and applications thereof. The method uses a fatty alcohol as an initiator, adds a first epoxy compound, and conducts a polymerization reaction to produce a fatty alcohol polyether. The fatty alcohol polyether is then subjected to a hydroamination reaction with liquid ammonia to produce a fatty alcohol polyetheramine. Finally, the fatty alcohol polyetheramine is subjected to a polymerization reaction with a second epoxy compound to produce a fatty alcohol polyetheramine polyether. The fatty alcohol polyetheramine polyether prepared by the present invention has the advantages of being safe, non-toxic, non-irritating to the skin, biodegradable, compatible, and environmentally friendly. It can be used to prepare quaternary ammonium salt intermediates and various industrial solvents. The fatty alcohol polyetheramine polyether prepared by the method has a high total amine value, conversion rate, and tertiary amine selectivity, with the tertiary amine rate exceeding 98.0% and as high as 99.5%. The raw materials are natural and readily available, the preparation process is simple, and the method is suitable for large-scale production and application.

Description

Technical Field

[0001] The invention belongs to the technical field of preparation of organic polymer compounds, and particularly relates to a fatty alcohol polyetheramine polyether and a preparation method and application thereof. Background Art

[0002] Surfactants have fixed hydrophilic and lipophilic groups that are arranged in a directional pattern on the surface of a solution, significantly reducing surface tension and holding a special place in industry. Currently, surfactants are widely used in various fields of life and production, significantly improving production efficiency, promoting economic development, and bringing great convenience to people's lives. However, with the widespread use of surfactants, the harm they cause to the human body and the pollution they cause to the ecological environment are also increasing. With the continuous improvement of people's quality of life and the increasing demand for the ecological environment, "green chemistry" has become a hot topic of concern, and the development of environmentally friendly green surfactants is an inevitable trend.

[0003] Polyetheramine is one of the two main raw materials for synthesizing polyurethane materials, with the largest usage in the polyurethane industry and enormous market potential. However, with the increasing depletion of petrochemical energy, traditional polyetheramines such as ethylene glycol polyetheramine, methanol polyetheramine, and trimethylolpropane polyetheramine not only face raw material shortages, but also environmental pollution during production and use, hindering the sustainable development of the polyetheramine industry. Therefore, it is crucial to replace petroleum resources with environmentally friendly, renewable resources.

[0004] Fatty alcohol polyetheramines not only maintain the excellent properties of traditional surfactants but also possess unique advantages such as naturalness, mildness, renewable resources, and biodegradability. Due to their rich foaming properties, strong detergency, good emulsification and solubility, and low skin irritation, they are widely used in shampoos, bubble baths, cosmetics, household liquid detergents, and industrial cleaning agents such as glass cleaners, wall cleaners, and auto body cleaners. They can also be used as leveling agents and surfactants in the printing and dyeing industry.

[0005] Fatty alcohol polyetheramine polyethers retain the advantages of fatty alcohol polyetheramines while also possessing numerous advantages not found in fatty alcohol polyetheramines. They can be widely used as fungicides, disinfectants, softeners, antistatic agents, demulsifiers, and other applications in agriculture, medicine, rubber, textile printing and dyeing, and as drilling fluids in the petrochemical industry, demonstrating their promising potential. However, currently, there are numerous methods for preparing fatty alcohol polyethers or traditional polyetheramines, and there is no literature describing methods for preparing fatty alcohol polyetheramine polyethers. Therefore, there is a significant need to develop a new, green, environmentally friendly, and renewable fatty alcohol polyetheramine polyether. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, the present invention aims to provide a novel green, environmentally friendly, and renewable fatty alcohol polyetheramine polyether, as well as a preparation method and application thereof. This preparation method uses natural fatty alcohols as raw materials. The prepared fatty alcohol polyetheramine polyether retains the advantages of fatty alcohol polyetheramines while increasing water solubility and permeability. Furthermore, the primary amine groups at the ends are converted to tertiary amines, making them useful as intermediates for preparing quaternary ammonium salts. The fatty alcohol polyetheramine polyether prepared by this method can be widely used as a bactericide, disinfectant, softener, antistatic agent, demulsifier, and the like, and is applicable to agriculture, medicine, rubber, textile printing and dyeing, and other fields.

[0007] The invention provides a method for preparing fatty alcohol polyetheramine polyether.

[0008] Specifically, a method for preparing fatty alcohol polyetheramine polyether comprises the following steps:

[0009] The method comprises the following steps: using a fatty alcohol as an initiator, adding a first epoxy compound to carry out a polymerization reaction to obtain a fatty alcohol polyether; then carrying out a hydroamination reaction of the fatty alcohol polyether with liquid ammonia to obtain a fatty alcohol polyetheramine; and finally carrying out a polymerization reaction of the fatty alcohol polyetheramine with a second epoxy compound to obtain the fatty alcohol polyetheramine polyether.

[0010] Preferably, the first epoxy compound and the second epoxy compound are independently selected from at least one of ethylene oxide, propylene oxide, ethylene oxide / propylene oxide random copolymer, and ethylene oxide / propylene oxide block copolymer.

[0011] More preferably, the first epoxy compound is propylene oxide; and the second epoxy compound is ethylene oxide.

[0012] Preferably, the fatty alcohol is C 12 ~C 18 Fatty alcohol.

[0013] More specifically, a method for preparing fatty alcohol polyetheramine polyether comprises the following steps:

[0014] (1) C 12 ~C 18 Fatty alcohol is used as an initiator, a first epoxy compound is added, and a polymerization reaction is carried out at 135-145°C under the action of a first catalyst to prepare fatty alcohol polyether;

[0015] (2) adding the fatty alcohol polyether prepared in step (1), liquid ammonia and hydrogen into a reaction kettle, and carrying out a hydroamination reaction at 160-180° C. in the presence of a second catalyst to obtain a fatty alcohol polyether amine;

[0016] (3) introducing a second epoxy compound into the fatty alcohol polyether amine prepared in step (2), and carrying out a polymerization reaction at 155-160° C. under the action of a third catalyst to obtain a fatty alcohol polyether amine polyether.

[0017] Preferably, in step (1), the C 12 ~C 18 Fatty alcohol is C 12 Lauryl alcohol, C 14 Myristyl alcohol, C 16 Palmitoyl alcohol or C 18 One of stearyl alcohol; further preferably, the C 12 ~C 18 Fatty alcohol is C 16 Palmitoyl alcohol or C 18 Stearyl alcohol.

[0018] Preferably, in step (1), the C 12 ~C 18 The molar ratio of the fatty alcohol to the first epoxy compound is 1:3 to 1:6; further preferably, the C 12 ~C 18 The molar ratio of the fatty alcohol to the first epoxy compound is 1:3 to 1:5; more preferably, the C 12 ~C 18 The molar ratio of the fatty alcohol to the first epoxy compound is 1:4.

[0019] Preferably, in step (1), the first catalyst is at least one of potassium hydroxide, sodium hydroxide, and a double metal cyanide complex catalyst (DMC).

[0020] Preferably, when a double metal cyanide complex catalyst (DMC) is selected, the amount of the double metal cyanide complex catalyst added is 5% to 10‰ of the total mass of the fatty alcohol and the first epoxy compound; preferably, the amount of the double metal cyanide complex catalyst added is 7% to 9‰ of the total mass of the fatty alcohol and the first epoxy compound.

[0021] Preferably, in step (2), the molar ratio of the fatty alcohol polyether to the liquid ammonia is 1:5 to 1:15; further preferably, the molar ratio of the fatty alcohol polyether to the liquid ammonia is 1:6 to 1:12; more preferably, the molar ratio of the fatty alcohol polyether to the liquid ammonia is 1:8 to 1:12, such as 1:10.

[0022] Preferably, in step (2), the molar ratio of the fatty alcohol polyether to the hydrogen is 1:2 to 1:8; further preferably, the molar ratio of the fatty alcohol polyether to the hydrogen is 1:2 to 1:5; more preferably, the molar ratio of the fatty alcohol polyether to the hydrogen is 1:3 to 1:5, such as 1:4. In step (2), the hydrogen not only participates in the last step of the hydrogenation reaction in the amination reaction, but also plays an important role in the reaction system, such as maintaining the catalyst reduction state, inhibiting side reactions, and maintaining catalyst activity.

[0023] Preferably, in step (2), the second catalyst is a palladium-carbon catalyst.

[0024] Preferably, the amount of the palladium-carbon catalyst added is 10% to 20% of the mass of the fatty alcohol polyether; further preferably, the amount of the palladium-carbon catalyst added is 12% to 18%, such as 15%, of the mass of the fatty alcohol polyether.

[0025] Preferably, in step (2), the temperature of the amination reaction is 170-180° C., the pressure of the amination reaction is 8-13 MPa, and the time of the amination reaction is 2-6 hours; further preferably, the temperature of the amination reaction is 175-180° C., the pressure of the amination reaction is 11-12 MPa, and the time of the amination reaction is 4.5-1.5 hours.

[0026] Preferably, in step (3), the molar ratio of the fatty alcohol polyether amine to the second epoxy compound is 1:5 to 1:8; further preferably, the molar ratio of the fatty alcohol polyether amine to the second epoxy compound is 1:5 to 1:6.

[0027] Preferably, in step (3), the third catalyst comprises at least one of potassium hydroxide or sodium hydroxide; further preferably, the third catalyst is potassium hydroxide.

[0028] Preferably, in step (3), the amount of the third catalyst added is 5‰ to 15‰ of the total mass of the fatty alcohol polyether amine and ethylene oxide; further preferably, the amount of the third catalyst added is 5‰ to 10‰ of the total mass of the fatty alcohol polyether amine and ethylene oxide; more preferably, the amount of the third catalyst added is 7‰ to 9‰, such as 8‰, of the total mass of the fatty alcohol polyether amine and ethylene oxide.

[0029] The present invention also provides a fatty alcohol polyether amine polyether, which is prepared by the above-mentioned preparation method of fatty alcohol polyether amine polyether, and the tertiary amine rate of the fatty alcohol polyether amine polyether is greater than 98.0%.

[0030] The present invention also provides a surfactant comprising the fatty alcohol polyetheramine polyether.

[0031] It can be understood that in the above content, the first, second and third are only used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] (1) The fatty alcohol polyetheramine polyether prepared by the present invention introduces a tertiary amine group on the basis of fatty alcohol polyether, which not only retains the advantages of fatty alcohol polyetheramine, but also increases water solubility and permeability, and can be used to prepare intermediates of quaternary ammonium salts and various industrial solvents; compared with fatty alcohol polyether, the fatty alcohol polyetheramine polyether prepared by the present invention has a wider range of applications in the industrial field, and can be used for fungicides, disinfectants, softeners, antistatic agents, demulsifiers and drilling fluids, and has better performance.

[0034] (2) Compared with traditional polyetheramines such as ethylene glycol polyetheramine, methanol polyetheramine, and trimethylolpropane polyetheramine, the fatty alcohol polyetheramine polyether prepared by the present invention has readily available raw materials, does not consume non-renewable resources such as petroleum and coal, and has a low raw material cost. Compared with traditional polyetheramines, the fatty alcohol polyetheramine polyether prepared by the present invention not only has rich foam, strong detergency, good emulsification and solubility, but also has the advantages of being safe and non-toxic, non-irritating to the skin, biodegradable, compatible, and green and environmentally friendly, meeting the requirements of environmentally friendly materials.

[0035] (3) The fatty alcohol polyetheramine polyether prepared by the present invention has high total amine value, conversion rate, and tertiary amine selectivity, and the product quality is good, wherein the tertiary amine rate is greater than 98.0%, and is as high as 99.5%. In addition, the raw materials are natural and easily available, and the preparation process is simple, which is suitable for large-scale production and application.

[0036] The present invention will be further described in detail below with reference to specific embodiments. DETAILED DESCRIPTION

[0037] Unless otherwise specified, the raw materials, reagents, or devices used in the following examples can be obtained from conventional commercial sources or by existing known methods.

[0038] In the following examples, the method for determining the hydroxyl value of the fatty alcohol polyether synthesized in the first step refers to GB / T12008.3-2009, and the molecular weight is calculated. The method for determining the total amine value 1 of the fatty alcohol polyether amine synthesized in the second step adopts 0.5 mol / L hydrochloric acid solution to titrate the product, and the total amine value of the product can be calculated by the volume of hydrochloric acid consumed. The method for determining the primary amine value adopts salicylaldehyde to react with primary amine, and then titrates with hydrochloric acid, and calculates the primary amine value in the sample by subtracting the secondary amine value and tertiary amine value from the total amine value. The total amine value 2 and tertiary amine value of the fatty alcohol polyether amine polyether synthesized in the third step are measured. The method for determining the tertiary amine value adopts the acetic anhydride-perchloric acid method, and the amination conversion rate and primary amine rate are calculated according to formula (1), formula (2) and formula (3):

[0039] Amination conversion rate = total amine value 1 / hydroxyl value × 100% (1);

[0040] Primary amine ratio = primary amine value / total amine value 1×100% (2);

[0041] Tertiary amine ratio = tertiary amine value / total amine value 2 × 100% (3).

[0042] Example 1

[0043] A method for preparing fatty alcohol polyetheramine polyether comprises the following steps:

[0044] (1) Preparation of fatty alcohol polyether: 242g C 16 Palm alcohol was added to a stirred autoclave, nitrogen was added three times, stirring was initiated, and the temperature was raised to 115°C. Dehydration was continued for 1 hour, then the temperature was lowered to 90°C. 3.8g of DMC catalyst (double metal cyanide complex catalyst) was added, the temperature was raised to 130°C, and propylene oxide was slowly introduced at an addition rate of 4,232g. Polymerization was carried out at a pressure of 0.20 MPa and a temperature of 145°C. After the addition of the ingredients, the reaction was matured at 115°C. The reaction was terminated when the pressure in the autoclave did not decrease within 30 minutes. The reaction was then degassed and the crude fatty alcohol polyether was discharged. The crude product was then post-treated by neutralization with phosphoric acid and adjustment of the pH to 4.5-5. An adsorbent was then added for adsorption, followed by dehydration by vacuum distillation. The product was filtered to obtain the fatty alcohol polyether. Chemical analysis determined the hydroxyl value and molecular weight.

[0045] (2) Synthesis of fatty alcohol polyether amine: Add about 474g of the obtained fatty alcohol polyether and 71g of palladium carbon catalyst into a high-pressure reactor, add nitrogen three times, connect the reactor to a liquid ammonia tank, turn on the cooling device, slowly pressurize 170g of liquid ammonia into the reactor, and fill a certain volume of hydrogen to make the reactor have an initial pressure of 2.0MPa. Turn on the stirring and heat to 180℃, carry out the amination reaction under the pressure of 12Mpa in the reactor, and keep it warm for 5h. After the reaction is completed, cool down and release the pressure, absorb the unreacted ammonia and hydrogen with water, and collect the crude fatty alcohol polyether amine product. After post-treatment, dehydration, deammoniation and filtration are carried out to obtain the fatty alcohol polyether amine product. Chemical analysis measures the total amine value of 1 and the primary amine value, and the amination conversion rate is 99% and the primary amine rate is 98.0%.

[0046] (3) Synthesis of fatty alcohol polyether amine polyether: Add about 470g of the prepared fatty alcohol polyether amine to a stirred reactor, add nitrogen three times, start stirring, and heat to 110-115°C. Dehydrate for 1 hour, cool to 90°C, add 5.9g of potassium hydroxide, heat to 150°C, slowly introduce ethylene oxide, the addition number of ethylene oxide is 6,264g, and carry out polymerization reaction under the conditions of pressure of 0.30MPa and temperature of 160°C. After the feeding is completed, the aging temperature is 115°C. When the pressure in the reactor no longer decreases within 30 minutes, the reaction is terminated, degassed, and the crude fatty alcohol polyether amine polyether is discharged. The finished fatty alcohol polyether amine polyether is then post-treated to obtain the finished fatty alcohol polyether amine polyether. Chemical analysis, total amine value 2 and tertiary amine value are measured, and the tertiary amine rate can reach 99.5%.

[0047] The chemical formula involved in this embodiment is shown in Formula I.

[0048]

[0049] Example 2

[0050] A method for preparing fatty alcohol polyetheramine polyether comprises the following steps:

[0051] (1) Preparation of fatty alcohol polyether: 256g C 18 Stearyl alcohol was added to a stirred autoclave, nitrogen was added three times, stirring was started, and the temperature was raised to 115°C. Dehydration was carried out for 1 hour, the temperature was lowered to 90°C, 4.4g of sodium hydroxide catalyst was added, the temperature was raised to 130°C, and propylene oxide was slowly introduced at an addition rate of 5,290g. The polymerization reaction was carried out at a pressure of 0.20 MPa and a temperature of 135°C. After the addition was completed, the aging temperature was set at 115°C. The reaction was terminated when the pressure in the autoclave did not decrease within 30 minutes. The product was degassed and discharged to obtain a crude fatty alcohol polyether. The product was then post-treated, neutralized with phosphoric acid, and the pH was adjusted to 4.5-5. An adsorbent was then added for adsorption, followed by dehydration by vacuum distillation. The fatty alcohol polyether was obtained after filtration, and the hydroxyl value and molecular weight were determined by chemical analysis.

[0052] (2) Synthesis of fatty alcohol polyether amine: Add about 546g of the obtained fatty alcohol polyether and 65.5g of palladium carbon catalyst into a high-pressure reactor, add nitrogen three times, connect the reactor to a liquid ammonia tank, turn on the cooling device, slowly pressurize 204g of liquid ammonia into the reactor, and fill a certain volume of hydrogen to make the initial pressure in the reactor 1.8MPa. Turn on the stirring and heat to 170℃, carry out the amination reaction under the pressure in the reactor of 11Mpa, and keep it warm for 6h. After the reaction is completed, cool down and release the pressure, absorb the unreacted ammonia and hydrogen with water, and collect the crude fatty alcohol polyether amine product. After post-treatment, dehydration, deammoniation and filtration are carried out to obtain the fatty alcohol polyether amine product. Chemical analysis measures the total amine value of 1 and the primary amine value, and the amination conversion rate is 98% and the primary amine rate is 97.5%.

[0053] (3) Synthesis of fatty alcohol polyether amine polyether: Add about 540g of the prepared fatty alcohol polyether amine to a stirred reactor, add nitrogen three times, start stirring, and heat to 110-115°C. Dehydrate for 1 hour, cool to 90°C, add 4.6g of sodium hydroxide, heat to 150°C, slowly introduce ethylene oxide with an addition number of 5,220g of ethylene oxide, and carry out polymerization reaction at a pressure of 0.30MPa and a temperature of 160°C. After the feeding is completed, the aging temperature is 115°C. When the pressure in the reactor no longer decreases within 30 minutes, the reaction is terminated, degassed, and the crude fatty alcohol polyether amine polyether is discharged. The finished fatty alcohol polyether amine polyether is then post-treated to obtain the finished fatty alcohol polyether amine polyether. Chemical analysis, total amine value 2 and tertiary amine value are measured, and the tertiary amine rate can reach 99.0%.

[0054] The chemical formula involved in this embodiment is shown in Formula II.

[0055]

[0056] Example 3

[0057] A method for preparing fatty alcohol polyetheramine polyether comprises the following steps:

[0058] (1) Preparation of fatty alcohol polyether: 228g C 14Myristyl alcohol was added to a stirred autoclave, nitrogen was added three times, stirring was started, and the temperature was raised to 115°C. Dehydration was carried out for 1 hour, then the temperature was lowered to 90°C. 2.8g of potassium hydroxide catalyst was added, the temperature was raised to 130°C, and propylene oxide was slowly introduced at an addition rate of 3,174g. The polymerization reaction was carried out at a pressure of 0.20 MPa and a temperature of 140°C. After the addition of the ingredients, the aging temperature was set at 115°C. The reaction was terminated when the pressure in the autoclave did not decrease within 30 minutes. The product was degassed and discharged to obtain a crude fatty alcohol polyether. The product was then post-treated, neutralized with phosphoric acid, and the pH was adjusted to 4.5-5. An adsorbent was then added for adsorption, followed by dehydration by vacuum distillation. The product was filtered to obtain the fatty alcohol polyether. Chemical analysis was performed to determine the hydroxyl value and molecular weight.

[0059] (2) Synthesis of fatty alcohol polyether amine: Add about 402g of the obtained fatty alcohol polyether and 40g of palladium carbon catalyst into a high-pressure reactor, add nitrogen three times, connect the reactor to a liquid ammonia tank, turn on the cooling device, slowly pressurize 102g of liquid ammonia into the reactor, and fill a certain volume of hydrogen to make the reactor have an initial pressure of 2.2MPa. Turn on the stirring and heat to 160℃, carry out the amination reaction under the pressure of 9MPa in the reactor, and keep it warm for 3h. After the reaction is completed, cool down and release the pressure, absorb the unreacted ammonia and hydrogen with water, and collect the crude fatty alcohol polyether amine product. After post-treatment, dehydration, deammoniation and filtration are carried out to obtain the fatty alcohol polyether amine product. Chemical analysis measures the total amine value of 1 and the primary amine value, and the amination conversion rate is 95% and the primary amine rate is 97%.

[0060] (3) Synthesis of fatty alcohol polyether amine polyether: Add about 400g of the prepared fatty alcohol polyether amine to a stirred reactor, add nitrogen three times, start stirring, and heat to 110-115°C. Dehydrate for 1 hour, cool to 90°C, add 4.3g of sodium hydroxide, heat to 150°C, slowly introduce ethylene oxide, the addition number of ethylene oxide is 7,308g, and carry out polymerization reaction under the conditions of pressure of 0.30MPa and temperature of 155°C. After the feeding is completed, the aging temperature is 115°C. When the pressure in the reactor no longer decreases within 30 minutes, the reaction is terminated, degassed, and the crude fatty alcohol polyether amine polyether is discharged. Then, the finished fatty alcohol polyether amine polyether is post-treated to obtain the finished fatty alcohol polyether amine polyether. Chemical analysis, total amine value 2 and tertiary amine value are measured, and the tertiary amine rate can reach 98.0%.

[0061] The chemical formula involved in this embodiment is shown in Formula III.

[0062]

[0063] Example 4

[0064] A method for preparing fatty alcohol polyetheramine polyether comprises the following steps:

[0065] (1) Preparation of fatty alcohol polyether: 214g C 12 Lauryl alcohol was added to a stirred autoclave, nitrogen was added three times, stirring was started, and the temperature was raised to 115°C. Dehydration was carried out for 1 hour, then the temperature was lowered to 90°C. 3.9g of DMC catalyst was added, the temperature was raised to 130°C, and propylene oxide was slowly introduced at an addition rate of 6,348g. Polymerization was carried out at a pressure of 0.20 MPa and a temperature of 145°C. After the addition of the materials was completed, the aging temperature was set at 115°C. The reaction was terminated when the pressure in the autoclave did not decrease within 30 minutes. The product was degassed and discharged to obtain a crude fatty alcohol polyether. The product was then post-treated, neutralized with phosphoric acid, and the pH was adjusted to 4.5-5. An adsorbent was then added for adsorption, followed by dehydration by vacuum distillation. The product was filtered to obtain the fatty alcohol polyether. Chemical analysis was performed to determine the hydroxyl value and molecular weight.

[0066] (2) Synthesis of fatty alcohol polyether amine: Add about 562g of the obtained fatty alcohol polyether and 73g of palladium carbon catalyst into a high-pressure reactor, add nitrogen three times, connect the reactor to a liquid ammonia tank, turn on the cooling device, slowly pressurize 136g of liquid ammonia into the reactor, and fill a certain volume of hydrogen to make the reactor have an initial pressure of 2.0MPa. Turn on the stirring and heat to 170℃, carry out the amination reaction under the pressure of 10MPa in the reactor, and keep it warm for 5h. After the reaction is completed, cool down and release the pressure, absorb the unreacted ammonia and hydrogen with water, and collect the crude fatty alcohol polyether amine product. After post-treatment, dehydration, deammoniation and filtration are carried out to obtain the fatty alcohol polyether amine product. Chemical analysis measures the total amine value of 1 and the primary amine value, and the amination conversion rate is 98% and the primary amine rate is 98%.

[0067] (3) Synthesis of fatty alcohol polyether amine polyether: Add about 560g of the prepared fatty alcohol polyether amine to a stirred reactor, add nitrogen three times, start stirring, and heat to 110-115°C. Dehydrate for 1 hour, cool to 90°C, add 7.3g of potassium hydroxide, heat to 150°C, slowly introduce ethylene oxide, the addition number of ethylene oxide is 8,352g, and carry out polymerization reaction under the conditions of pressure of 0.30MPa and temperature of 160°C. After the feeding is completed, the aging temperature is 115°C. When the pressure in the reactor no longer decreases within 30 minutes, the reaction is terminated, degassed, and the crude fatty alcohol polyether amine polyether is discharged. The finished fatty alcohol polyether amine polyether is then post-treated to obtain the finished fatty alcohol polyether amine polyether. Chemical analysis, total amine value 2 and tertiary amine value are measured, and the tertiary amine rate can reach 99.0%.

[0068] The chemical formula involved in this embodiment is shown in Formula IV.

[0069]

[0070] As can be seen from the above examples, the fatty alcohol polyether amine polyether prepared by the present invention has high total amine value, conversion rate, and tertiary amine selectivity, and has good product quality, wherein the tertiary amine rate is greater than 98.0% and as high as 99.5%. However, it should be noted that the preparation of fatty alcohol polyether amine polyether is not limited to the four types given in the examples. Suitable first epoxides and second epoxides can be selected according to specific needs. There are many types of fatty alcohol polyether amine polyethers, which can meet the needs of various industries for fatty alcohol polyether amine polyethers. Furthermore, by comparing Examples 1, 2, 3, and 4, it can be seen that the optimal process route for synthesizing fatty alcohol polyether amine polyether is: in the first step of the polymerization reaction, the selected catalyst is a DMC catalyst; in the second step of the amination reaction, the optimal reaction temperature is about 180°C, the reaction pressure is about 12 MPa, and the reaction time is about 5 hours; in the third step of the polymerization reaction, the selected catalyst is potassium hydroxide and the polymerization temperature is about 160°C. Under these conditions, the fatty alcohol polyether amine polyether prepared has higher total amine value, conversion rate, and tertiary amine selectivity, and better product quality.

[0071] In summary, the fatty alcohol polyetheramine polyether prepared by the present invention has a high conversion rate, high tertiary amine selectivity, and has the advantages of being safe and non-toxic, non-irritating to the skin, and having good compatibility. It meets the development requirements of environmentally friendly materials, thereby enabling the obtained fatty alcohol polyetheramine polyether to have higher reactivity and wider applications.

[0072] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A method for preparing fatty alcohol polyetheramine polyether, characterized in that: The following steps are involved: A fatty alcohol is used as an initiator, and a first epoxy compound is added to carry out a polymerization reaction to obtain a fatty alcohol polyether; the fatty alcohol polyether is then subjected to a hydroamination reaction with liquid ammonia to obtain a fatty alcohol polyetheramine; and finally, the fatty alcohol polyetheramine is subjected to a polymerization reaction with a second epoxy compound to obtain the fatty alcohol polyetheramine polyether; The tertiary amine rate of the fatty alcohol polyetheramine polyether is greater than 98.0%; the tertiary amine rate of the fatty alcohol polyetheramine polyether is the ratio of the tertiary amine value of the fatty alcohol polyetheramine polyether to the total amine value of the fatty alcohol polyetheramine polyether.

2. The preparation method according to claim 1, characterized in that The first epoxy compound and the second epoxy compound are independently selected from at least one of ethylene oxide and propylene oxide.

3. The preparation method according to claim 1 or 2, characterized in that The fatty alcohol is C 12 ~C 18 Fatty alcohol, the preparation method comprises the following steps: (1) C 12 ~C 18 Fatty alcohol is used as an initiator, a first epoxy compound is added, and a polymerization reaction is carried out at 135-145°C under the action of a first catalyst to prepare fatty alcohol polyether; (2) adding the fatty alcohol polyether prepared in step (1), liquid ammonia and hydrogen into a reaction kettle, and carrying out a hydroamination reaction at 160-180° C. in the presence of a second catalyst to obtain a fatty alcohol polyether amine; (3) A second epoxy compound is introduced into the fatty alcohol polyether amine prepared in step (2), and a polymerization reaction is carried out at 155-160° C. under the action of a third catalyst to obtain a fatty alcohol polyether amine polyether.

4. The preparation method according to claim 3, characterized in that In step (1), the C 12 ~C 18 The molar ratio of the fatty alcohol to the first epoxy compound is 1:3 to 1:

6.

5. The preparation method according to claim 4, characterized in that In step (1), the C 12 ~C 18 The molar ratio of the fatty alcohol to the first epoxy compound is 1:3 to 1:

5.

6. The preparation method according to claim 3, characterized in that In step (1), the first catalyst is at least one of potassium hydroxide, sodium hydroxide, and a double metal cyanide complex catalyst.

7. The preparation method according to claim 3, characterized in that In step (2), the molar ratio of the fatty alcohol polyether to the liquid ammonia is 1:5 to 1:15; the molar ratio of the fatty alcohol polyether to the hydrogen is 1:2 to 1:

8.

8. The preparation method according to claim 3, characterized in that In step (2), the second catalyst is a palladium-carbon catalyst; the amount of the palladium-carbon catalyst added is 10% to 20% of the mass of the fatty alcohol polyether.

9. The preparation method according to claim 3, characterized in that In step (3), the molar ratio of the fatty alcohol polyether amine to the second epoxy compound is 1:5 to 1:8; and the third catalyst includes at least one of potassium hydroxide or sodium hydroxide.

10. A fatty alcohol polyetheramine polyether, characterized in that The polyether is prepared by the preparation method of the fatty alcohol polyetheramine polyether according to any one of claims 1 to 9.

11. A surfactant, characterized in that The invention comprises the fatty alcohol polyetheramine polyether according to claim 10.

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