JP2713676B2 - Method for producing 3- [N- (2-aminoethyl)] aminopropylalkoxysilane and apparatus for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for producing 3- [N- (2-aminoethyl)] aminopropylalkoxysilane useful as a silane coupling agent and an apparatus for producing the same.

[0002]

2. Description of the Related Art 3- [N- (2-aminoethyl)] aminopropylalkoxysilane is widely used as a silane coupling agent. For example, it is a compound that is effective for improving adhesion at an organic-inorganic interface, improving various resins, and modifying the surface. The following methods are known as methods for synthesizing this compound.

For example, US Pat. No. 2,971,864, Polish Patent 1,456,71, J. Org. Chem., Vol. 36, No. 21, 197.
1,3120-3126 discloses a method of reacting 3-chloropropylalkoxysilane with ethylenediamine to obtain 3- [N- (2-aminoethyl)] aminopropylalkoxysilane. This method is most commonly known and is stoichiometrically represented by the following reaction formula: ClCH ₂ CH ₂ CH ₂ SiR ¹ _3-n (OR ² ) _n + 2H ₂ NCH ₂ CH ₂ NH ₂ → H ₂ NCH ₂ CH ₂ NHCH ₂ CH ₂ CH ₂ SiR ¹ _3-n (OR ² ) _n + H ₂ NCH ₂ CH ₂ NH ₂ .1 equivalent as indicated by 1 equivalent of 3-chloropropylalkoxysilane and 2 equivalents of ethylenediamine 3- [N- (2-aminoethyl)] aminopropylalkoxysilane can be synthesized, and at the same time, ethylenediamine hydrochloride is produced. However, in the actual reaction, 3- [N- (2-aminoethyl)] aminopropylalkoxysilane, 3-chloropropylalkoxysilane and ethylenediamine as raw materials further react to form a bissilyl compound R ¹ _3-n (OR ² ) _n SiCH ₂ CH ₂ CH ₂ NHCH ₂ CH ₂ NHCH ₂ CH ₂ CH ₂ SiR ¹ _3-n (O
R ² ) _n or H ₂ NCH ₂ CH ₂ N- [CH ₂ CH ₂ CH ₂ SiR ¹ _3-n (OR ² ) _n ] ₂ is generated. This side reaction is shown in the following reaction formula.

ClCH ₂ CH ₂ CH ₂ SiR ¹ _3-n (OR ² ) _n + H ₂ NCH ₂ CH ₂ NH ₂ + H ₂ NCH ₂ CH ₂ NHCH ₂ CH ₂ CH ₂ SiR ¹ _3-n (OR ² ) _n → R ¹ _3-n (OR ² ) _n SiCH ₂ CH ₂ CH ₂ NHCH ₂ CH ₂ NHCH ₂ CH ₂ CH ₂ SiR ¹ _3-n (OR ² ) _n or H ₂ NCH ₂ CH ₂ N- [CH ₂ CH ₂ CH ₂ SiR ¹ _3-n (OR ² ) _n ] ₂ + H ₂ NCH ₂ CH ₂ NH ₂ .HCl The formation of the bissilyl form is the desired product 3- [N- (2-aminoethyl)] aminopropyl Since the yield of alkoxysilane is greatly reduced, some measures have been taken to reduce the side reaction. Japanese Patent Publication No. 40-1185 discloses a method in which 4 to 6 equivalents of ethylenediamine is reacted with 3-chloropropylalkoxysilane, but the reduction of side reactions is insufficient and the yield of the target product is insufficient. Is also low. Tokiko 56-1004891
No. 7 for 3-chloropropylalkoxysilane
It is disclosed to react 10 to 10 equivalents of ethylenediamine. In this method, the production of the bissilyl compound can be suppressed, and the yield of the target product also increases. However, since a step of removing excess ethylenediamine out of the system after the reaction is required, the production process becomes complicated. Further, since a large amount of ethylenediamine is used for 3-chloropropylalkoxysilane, the production efficiency per batch is poor.

In addition, JP-A-48-64031 and JP-A-2-
No. 300192 discloses a method of reacting hydroalkoxysilane with N-allylethylenediamine in the presence of a platinum catalyst to obtain 3- [N- (2-aminoethyl)] aminopropylalkoxysilane. But this method
In addition to the desired γ-form of 3- [N- (2-aminoethyl)] aminopropylalkoxysilane, the isomer β-form of 2- [N
-(2-Aminoethyl)] amino-1-methylethylalkoxysilane is produced in large quantities. Since both have close boiling points and are difficult to separate, the purity of the target product decreases.

JP-B-63-30313 discloses that 2-cyanoethylalkoxysilane, ethylenediamine and hydrogen gas are reacted in the presence of a heterogeneous hydrogenation catalyst for a metal selected from rhodium, platinum and palladium. -[N- (2-
A method for obtaining [aminoethyl)] aminopropylalkoxysilane is disclosed. This method requires a condition of high temperature and high pressure for a long time, and the production efficiency per batch is poor.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is intended to provide 3- [N- (2-aminoethyl)] aminopropylalkoxysilane with a small side reaction and a high production efficiency. It is an object of the present invention to provide a manufacturing method and an apparatus suitable for performing the manufacturing method.

[0008]

Means for Solving the Problems The production method of the present invention, which has been made to achieve the above object, is a method of producing a compound represented by the general formula ClCH ₂ CH ₂ CH ₂ SiR ¹ _3-n (OR ² ) _n. Chloropropylalkoxysilane is reacted with ethylenediamine to form a compound represented by the general formula H ₂ NCH ₂ CH ₂ NHCH ₂ CH ₂ CH ₂ SiR ¹ _3-n (OR ² ) _n (wherein R ¹ and R ² are carbon atoms Is an alkyl group of 1 to 6, n is 1 to
3 [integer of 3] to produce 3- [N- (2-aminoethyl)] aminopropylalkoxysilane. In production, 1 equivalent of 3-chloropropylalkoxysilane and 3 to 5 equivalents of ethylenediamine are constantly supplied to the reaction system to cause a reaction, and the reaction product obtained by the reaction system is heated to a boiling point of ethylenediamine or higher. the unreacted ethylene diamine mixed in the reaction was evaporated and refluxed to the reaction system, the predetermined time concentrate after ethylenediamine evaporation
Each time, the step of extracting is continuously performed, and the refluxed ethylenediamine is reacted with 3-chloropropylalkoxysilane together with the ethylenediamine constantly supplied as described above.

A manufacturing apparatus of the present invention suitable for carrying out the manufacturing method of the present invention will be described below with reference to FIG.

The production apparatus of the present invention comprises a vertical reaction tower 3 connected to a supply path 2 for 3-chloropropylalkoxysilane and a supply path 1 for ethylenediamine, and a reflux condenser connected to the top of the vertical reaction tower 3. 4 and vertical reaction tower 3
A distillation can 7 having a stirrer 8 which can be heated to a temperature higher than the boiling point of ethylenediamine, and a receiver 10 which is connected to the distillation can 7.

[0011]

In the above-mentioned reactor, while the distillation can 7 is heated to the boiling point of ethylenediamine or higher, ethylenediamine from the supply path 1 and 3-chloropropylalkoxysilane from the supply path 2 are simultaneously and constantly supplied in a liquid state. . The supply ratio is 3 to 5 equivalents of ethylenediamine with respect to 1 equivalent of 3-chloropropylalkoxysilane. In the vertical reaction column within 3 react 3-chloropropylalkoxysilane and ethylene diamine according to the following reaction _{formula, ClCH 2 CH 2 CH 2 SiR} 1 3-n (OR 2) n + 2H 2 NCH 2 CH 2 NH 2 → H ₂ NCH ₂ CH ₂ NHCH ₂ CH ₂ CH ₂ SiR ¹ _3-n (OR ² ) _n + H ₂ NCH ₂ CH ₂ NH ₂ · HCl Desired 3- [N- (2-aminoethyl)] aminopropylalkoxysilane Are formed, at the same time producing ethylenediamine hydrochloride. Since ethylenediamine is supplied in excess of the reaction equivalent of 3-chloropropylalkoxysilane, it is mixed into the product, but 3-chloropropylalkoxysilane almost reacts. This product flows from the vertical reaction tower 3 to the distillation can 7. The distillation can 7 is heated above the boiling point of ethylenediamine. When the product is stirred by the stirrer 8, 3- [N- (2-aminoethyl)] aminopropylalkoxysilane and ethylenediamine hydrochloride having a high boiling point are mixed liquid. But ethylenediamine evaporates.
The vaporized ethylenediamine reaches the reflux condenser 4 through the vertical reaction tower 3, where it is cooled to become a liquid and returns to the vertical reaction tower 3. The ethylenediamine liquid thus refluxed is supplied to the reaction with 3-chloropropylalkoxysilane in the vertical reaction tower 3 together with the ethylenediamine constantly supplied from the supply path 1.

At this time, the total supply amount of ethylenediamine is:
Initially, it becomes much more than the equivalent supplied constantly, and reacts substantially as about 8 to 10 equivalents. Therefore, the production reaction rate is increased, and the production of a bissilyl compound that reduces the yield of 3- [N- (2-aminoethyl)] aminopropylalkoxysilane is suppressed.

On the other hand, unreacted ethylene dia
The concentrate after the evaporation of the min, that is, the mixed liquid of 3- [N- (2-aminoethyl)] aminopropylalkoxysilane and ethylenediamine hydrochloride is drained to the receiver 10 at predetermined intervals.
After being discharged and cooled, it is separated by a conventional method. And an object with good purity is obtained.

[0014]

EXAMPLES Hereinafter, examples of the method for producing 3- [N- (2-aminoethyl)] aminopropylalkoxysilane and the apparatus for producing the same according to the present invention will be described in detail.

An embodiment of the manufacturing apparatus is shown in FIG.
A supply pipe 2 for 3-chloropropylalkoxysilane as a raw material and a supply pipe 1 for ethylenediamine as another raw material are connected to the top of the vertical reaction tower 3. Further, a reflux cooler 4 and a reflux path passing from the reflux cooler 4 to the gas-liquid separator 5 and the return port 6 are connected to the top of the vertical reaction tower 3. A distillation can 7 is connected to the bottom outlet of the vertical reaction tower 3. The distillation can 7 is provided with a heating device 11 and a stirrer 8. The discharge port of the distillation can 7 is connected to a receiver 1 via a valve.
0 is linked. The receiver 10 is provided with a cooling device 12, and an outlet 13 for 3- [N- (2-aminoethyl)] aminopropylalkoxysilane and an outlet 14 for ethylenediamine hydrochloride are provided below the receiver 10 through valves. Is provided.

The vertical reaction tower 3 can be made of, for example, Pyrex glass, and contains therein a filler such as pottery, glass, Raschig ring, bell saddle, or helix for improving gas-liquid contact. It may be filled or have a perforated plate, wet wall structure. Although the vertical reaction tower 3 does not particularly need to be heated, the temperature may decrease due to the latent heat removed from the surroundings when the ethylenediamine evaporates, so that even if the heating is performed from inside or around the vertical reaction tower 3 in order to prevent the temperature decrease. Good. The structure of the vertical reaction column 3 is not particularly limited, and a distillation column generally used for distillation can be used. The tower height need only be set from an economic point of view.

The distillation can 7 can be heated by the heating device 11 to a temperature higher than the boiling point of ethylenediamine, and is preferably heated to about 120 to 200 ° C., particularly preferably about 120 to 160 ° C. If the temperature is lower than 120 ° C., it is impossible to reflux ethylenediamine, and the reaction rate is reduced. Therefore, unreacted 3-chloropropylalkoxysilane is mixed into the product, and reacts with the generated 3- [N- (2-aminoethyl)] aminopropylalkoxysilane to produce a bissilyl compound as a by-product. 2
If the temperature is higher than 00 ° C., the product may be colored or a high-boiling by-product may be generated.

Ethylenediamine is charged into the reactor in advance before the reaction in order to cause reflux, and the amount thereof may be any amount that can achieve a reflux state according to the scale of the reactor.

The supply amounts of 3-chloropropylalkoxysilane and ethylenediamine are as follows.
It is preferably 3 to 5 times the equivalent of chloropropylalkoxysilane. When the equivalent ratio is 5 times or more, the two-layer separation between the upper layer and the lower layer of the product is deteriorated. In addition, a large amount of energy is required to boil the excess ethylenediamine, and a step of distilling the ethylenediamine out of the system after the reaction is required, which lowers production efficiency. When the equivalent ratio is 3 or less, the progress of the reaction becomes incomplete, the by-product of the bissilyl compound increases, and the yield of 3- [N- (2-aminoethyl)] aminopropylalkoxysilane decreases.

3-Chloropropylalkoxysilane and ethylenediamine are supplied in a liquid state so as to be uniformly distributed in the cross section of the vertical reaction tower 3. The liquid temperature during the supply may be a temperature equal to or lower than the boiling point of ethylenediamine.

The operation after the reaction in the vertical reaction tower 3, that is, the operation after taking out the product from the lower end of the vertical reaction tower 3 to the distillation can 7 is performed at predetermined intervals at predetermined intervals. This
The predetermined time is not limited in terms of time, but includes the capacity of the distillation can 7 and the receiver 10, the supply amounts of 3-chloropropylalkoxysilane and ethylenediamine, the cooling capacity and the liquid separation capacity of the receiver 10, and the like. The predetermined time may be set in consideration of the facility capacity.

The reason why the product stored in the distillation can 7 must be continuously stirred is that the product is allowed to stand and immediately after the standing, 3- [N- (2-aminoethyl)] aminopropylalkoxysilane and ethylenediamine in the lower layer Separate into two layers with hydrochloride. Therefore, if the product is extracted without stirring, the lower layer is extracted predominantly, so that the balance between the amounts of 3-chloropropylalkoxysilane and ethylenediamine in the system is lost and a side reaction occurs.

This reaction is preferably carried out using only ethylenediamine and 3-chloropropylalkoxysilane without using a solvent. Although the reaction can be carried out in a solvent inert to the reactants, the use of a solvent has no particular effect on the reaction, and the separation of ethylenediamine hydrochloride becomes difficult, thereby reducing the production efficiency.

The reaction is preferably carried out under anhydrous conditions, and is an inert gas which does not react with the raw materials and products, for example, nitrogen,
It is preferable to carry out the reaction under an atmosphere of argon. When there is moisture in the reaction system, 3-chloropropylalkoxysilane and
3- [N- (2-aminoethyl)] aminopropylalkoxysilane is hydrolyzed and condensed, or the temperature of the by-product methanol is reduced by vaporization, so that ethylenediamine cannot be refluxed.

The reaction is preferably carried out at atmospheric pressure, ie, at about 760 mmHg, but at pressures from about 10 mmHg to about 760 mHg.
It can be performed even during mHg. If the pressure is higher than the atmospheric pressure, the temperature of the distillation still must be increased.

In the 3-chloropropylalkoxysilane used in the production method of the present invention, R ¹ and R ² are preferably a methyl group or an ethyl group. Specifically, 3-chloropropyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyldimethylmethoxysilane, 3-chloropropyltriethoxysilane, 3
-Chloropropylmethyldiethoxysilane, 3-chloropropyldimethylethoxysilane, 3-chloropropylethyldimethoxysilane, 3-chloropropyldiethylmethoxysilane, 3-chloropropylethylmethylmethoxysilane, 3-chloropropylethyldiethoxysilane, 3-chloropropyldiethylethoxysilane, 3-
Chloropropylethylmethylethoxysilane can be exemplified. These are readily available and inexpensive.

The 3- [N- (2-aminoethyl)] aminopropylalkoxysilane produced from 3-chloropropylalkoxysilane exemplified above includes 3- [N-
(2-aminoethyl)] aminopropyltrimethoxysilane, 3- [N- (2-aminoethyl)] aminopropylmethyldimethoxysilane, 3- [N- (2-aminoethyl)] aminopropyldimethylmethoxysilane, 3 -[N- (2-aminoethyl)] aminopropyltriethoxysilane, 3- [N- (2-aminoethyl)] aminopropylmethyldiethoxysilane, 3- [N- (2-
Aminoethyl)] aminopropylethyldimethoxysilane, 3- [N- (2-aminoethyl)] aminopropyldiethylmethoxysilane, 3- [N- (2-aminoethyl)] aminopropylethylmethylmethoxysilane, 3- [ N- (2-aminoethyl)]
Aminopropylethyldiethoxysilane, 3- [N- (2-aminoethyl)] aminopropyldiethylethoxysilane, 3-
[N- (2-aminoethyl)] aminopropylethylmethylethoxysilane.

The following is an experimental example in which 3- [N- (2-aminoethyl)] aminopropyltrimethoxysilane was produced.

Experimental Example The vertical reaction tower 3 of the manufacturing apparatus is made of Pyrex glass, has an inner diameter of 30 mm and a length of 1000 mm, and is filled with a glass ring-shaped packing. Distilling can 7 and receiver 10
Is made of glass and has an internal volume of 3000 ml.

Beforehand, the air in the apparatus was sufficiently replaced with nitrogen. After the stirrer 8 is operated and the distillation can 7 is heated to 120 ° C. by the heating device 11, ethylenediamine is supplied from the supply port 1. Ethylenediamine passes through the vertical reaction column 3 and enters the distillation can 7, where it is heated to a gas.
The gas of ethylenediamine rises, passes through the vertical reaction tower 3 and is cooled by the reflux condenser 4 to become a liquid. The liquid ethylenediamine is supplied from the reflux condenser 4 to the gas-liquid separator 5,
It is refluxed through the return port 6 to the top of the vertical reaction tower 3 and this state is maintained.

Next, 3-chloropropyltrimethoxysilane was supplied from the supply port 2 at a rate of 1.15 g / min (0.0058 mol / min) and ethylenediamine was supplied from the supply port 1 at a rate of 1.31 g / min (0.
(0218 mol / min) for 1050 minutes, and reacted in the vertical reaction tower 3. During this time, the distillation can 7 was heated to maintain the reflux state of ethylenediamine at the top of the vertical reaction tower 3. The temperature in the distillation can 7 rose from 120 ° C to 136 ° C.

About 2700 ml of 3- [N- (2-aminoethyl)] aminopropyltrimethoxysilane and ethylenediamine hydrochloride produced by the reaction were stored in the distillation can 7 from the vertical reaction tower 3. While mixing the product with the stirrer 8, the bottom outlet 9 was opened and the product was transferred to the receiver 10. The product in the receiver 10 is cooled by the cooling device 12 to 40
Upon cooling to ５０50 ° C., the product separated into two layers. After the lower layer of ethylenediamine hydrochloride was separated from the outlet 14, the upper layer of 3- [N- (2-aminoethyl)] aminopropyltrimethoxysilane was taken out of the outlet 13. This operation was repeated three times, and the obtained 3- [N- (2-aminoethyl)] was obtained.
Aminopropyltrimethoxysilane was purified by single distillation. 3658 g of 3- [N- (2-aminoethyl)] aminopropyltrimethoxysilane could be isolated. 90% yield
And was calculated based on 3-chloropropyltrimethoxysilane.

The obtained 3- [N- (2-aminoethyl)] aminopropyltrimethoxysilane was analyzed by gas chromatography and found to have a purity of 99.4%.

Another embodiment is the same as the above except that 3-chloropropylmethyldimethoxysilane is supplied at a rate of 1.06 g / min (0.0058 mol / min) instead of 3-chloropropyltrimethoxysilane. I went. 32
81 g of 3- [N- (2-aminoethyl)] aminopropylmethyldimethoxysilane could be isolated and the yield was 87%.
The obtained 3- [N- (2-aminoethyl)] aminopropylmethyldimethoxysilane was analyzed by gas chromatography and found to have a purity of 99.1%.

As a comparison, by the conventional batch method,
The following comparative example experiment was performed.

Comparative Example 1 Ethylenediamine was added to a 200 ml glass four-necked flask equipped with a stirrer, a reflux condenser and a thermometer.
After charging 2.0 g (1.2 mol) and raising the temperature to 112 to 117 ° C, 3-chloropropyltrimethoxysilane was added in 5 g.
9.6 g (0.3 mol) was added dropwise over 2 hours using a dropping funnel. After aging for 1 hour, the product was transferred to a separatory funnel and cooled. After the product was separated into two layers, the lower layer of ethylenediamine hydrochloride was separated and removed, and the upper layer of 3- [N- (2-aminoethyl)] aminopropyltrimethoxysilane was removed. After single distillation of 3- [N- (2-aminoethyl)] aminopropyltrimethoxysilane, 46.8 g was obtained. The yield was 70.1%, and the bissilyl compound was considerably produced as a by-product.

Comparative Example 2 A 300 milliliter glass four-necked flask equipped with a stirrer, a reflux condenser, and a thermometer, was further provided with a reflux outlet between the reflux condenser and the flask. After 180.0 g (3.0 mol) of ethylenediamine was charged into the flask and the temperature was raised to 80 to 90 ° C., 74.4 g (0.37 mol) of 3-chloropropyltrimethoxysilane was added to the flask with a dropping funnel at 1.25 g. It was dropped over time. After aging for 1 hour, the temperature of the product was further raised to a boil, and 82.3 g (1.37 mol) of ethylenediamine was taken out from the outlet for reflux.
Was distilled out of the system. Next, the cooled and concentrated product was transferred to a separating funnel, and after the product was separated into two layers, the lower layer of ethylenediamine hydrochloride was separated and removed, and the upper layer of 3- [N- (2-amino- Ethyl)] aminopropyltrimethoxysilane was removed. A single distillation of 3- [N- (2-aminoethyl)] aminopropyltrimethoxysilane yielded 67.2 g. The yield was 81.7%. The production efficiency was low due to excessive use of ethylenediamine, and the by-product of the bissilyl compound could not be sufficiently suppressed.

[0038]

As described above, according to the present invention,
In the method for producing [N- (2-aminoethyl)] aminopropylalkoxysilane, by-products of a bissilyl compound are suppressed, and 3- [N-
(2-Aminoethyl)] aminopropylalkoxysilane is obtained in high yield. Since a conventional reaction apparatus can be used, and a step of distilling ethylenediamine out of the system is unnecessary, the production process is also simple. Further, 3- [N- (2-aminoethyl)] aminopropylalkoxysilane can be continuously produced, and the production efficiency is higher than that of a conventional batch production method.

[Brief description of the drawings]

FIG. 1 is a block diagram of a production apparatus used in a method for producing 3- [N- (2-aminoethyl)] aminopropylalkoxysilane to which the present invention is applied.

[Explanation of symbols]

1 is a supply port of ethylenediamine, 2 is a supply port of 3-chloropropylalkoxysilane, 3 is a vertical reaction tower, 4 is a reflux condenser, 5 is a gas-liquid separator, 6 is a reflux return port of ethylenediamine, and 7 is a distillation can. , 8 is a stirrer, 9 is a bottom outlet, 10 is a receiver, 11 is a heating device, 12 is a cooling device,
13 is an outlet for 3- [N- (2-aminoethyl)] aminopropylalkoxysilane, and 14 is an outlet for ethylenediamine hydrochloride.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mikio Endo 28-1, Nishifukushima, Oku-ku, Nakatsukushi-mura, Niigata Pref. Shinetsu Chemical Industry Co., Ltd. Synthetic Technology Research Institute 28, Nishifukushima, Nishifukushima, Shinjuku-mura, Japan Shin-Etsu Chemical Co., Ltd., Synthetic Technology Research Laboratory (56)

Claims (2)

(57) [Claims] 1. A general formula ^{_{ClCH 2 CH 2 CH 2 SiR 1}} 3-n (OR 2) and 3-chloropropyl alkoxysilane represented by _n, the general formula is reacted with ethylene diamine H ₂ NCH ₂ CH ₂ NHCH ₂ CH ₂ CH ₂ SiR ¹ _3-n (OR ² ) _n (wherein R ¹ and R ² are an alkyl group having 1 to 6 carbon atoms,
n is an integer of 1 to 3) 3- [N- (2-aminoethyl)]
In the method for producing aminopropylalkoxysilane, 3-chloropropylalkoxysilane is constantly supplied to the reaction system at a ratio of 1 equivalent and ethylenediamine at a ratio of 3 to 5 equivalents to cause a reaction. Heat above the boiling point of ethylenediamine, evaporate unreacted ethylenediamine mixed in the reaction product, reflux to the reaction system, and withdraw concentrated liquid after ethylenediamine evaporation every predetermined time
3- [N- (2-aminoethyl)] aminopropyl, characterized by reacting the refluxed ethylenediamine with 3-chloropropylalkoxysilane together with the ethylenediamine constantly supplied as described above. A method for producing an alkoxysilane. 2. A vertical reaction tower connected to a supply path of 3-chloropropylalkoxysilane and a supply path of ethylenediamine, a reflux condenser connected to a top of the vertical reaction tower, and a bottom of the vertical reaction tower. 3- [N- (2-aminoethyl)] characterized by comprising a distillation can with a stirrer connected to the discharge port and capable of heating to a temperature higher than the boiling point of ethylenediamine, and a receiver connected to the distillation can with the stirrer Equipment for producing aminopropylalkoxysilane.