JPS6322039A - Production of metal alkoxide derivative solution - Google Patents

Abstract

PURPOSE:A carboxylate salt of a metal selected from Sn, Al, Zr and Sb is dissolved in an alcohol and allowed to react in the presence of ammonia by adding mono-, di- or triethanolamine whereby the title stabilized solution is obtained. CONSTITUTION:A carboxylate salt (of 1-4C, preferably acetate) of a metal selected from the group consisting of Sn, Al, Zr and Sb is dissolved or dispersed in an alcohol of 1-4C, combined with mono-, di- or triethanolamine to effect the reactions in the presence of ammonia. The resultant solution is treated with an ion-exchange resin to give the objective solution of high purity and improved stability. The reaction using an amine in the presence of ammonia enables the formation of stabilized solution without formation of gel substance. The solution is hydrolyzed to give fine particles of hydroxide, hydrate or oxide of the metal in high purity.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention is applicable to tin, aluminum, zirconium, The present invention relates to a method for producing a stable derivative solution of a furkoxide of a metal selected from the group consisting of antimony.

[Conventional technique ml Among the metal flucoxides selected from the group consisting of tin, aluminum, zirconium, and antimony, the number of carbon atoms is 3.
Some of the alkoxides obtained using the above alcohols are in the form of solutions, but most of the alkoxides obtained using alcohols with carbon atoms of a2 or less are obtained in the form of solids, gels, or gels. is normal.

By the way, in addition to the solution state (which itself is a solution state),
For metal alkoxides obtained as solutions (including those obtained as solutions dissolved in organic solvents), by hydrolyzing the alkoxides, the hydroxides, hydrates, or oxides of the metals constituting the alkoxides can be turned into fine powders. In this case, since only water reacts with these metal alkoxides, there is less chance of other metal ions being mixed into the fine powder as impurities, and a highly pure fine powder can be obtained. There is an advantage. Regarding the metal alkoxide itself, if it is obtained in solution form, it can be purified by vacuum distillation at relatively low temperatures, or by recrystallization using organic solvents such as alcohols or aromatic hydrocarbons. There are some things.

Therefore, if it is possible to obtain alkoxides containing metals selected from the group consisting of tin, aluminum, zirconium, and antimony in the form of solutions, it will not only be easier to obtain these metal alkoxides in high purity, but also High-purity fine powders (hydrates, hydroxides, oxides) can be easily obtained by decomposition, and these fine powders can be sintered at relatively low temperatures and in a short time. From where we are, we are developing new ceramic fields such as alumina substrates used in IC boards, oxygen sensors, etc.
It is also expected that it will be extremely useful as a material in the field of functional thin films such as tin-antimony transparent conductive films.

[Problems to be solved by the invention] However, currently commercially available alkoxides of metals selected from the group consisting of tin, aluminum, zirconium, and antimony have low vapor pressures, or Some of them are poorly soluble in solvents, and it is difficult to purify them by recrystallization using vacuum fundamentals and solvents, making it difficult to obtain high-purity products. Among the metal alkoxides mentioned above, metal alkoxides with carbon atoms of 3 to 4 or more Even if liquid alkoxides are obtained using alcohol, these alkoxides are extremely unstable and easily deliquesce or hydrolyze due to moisture in the air, making them difficult to handle. It is. Furthermore, those that are hydrolyzed in the solid state.

The particle size of the product is relatively large and it is difficult to obtain a uniform particle size distribution.

In this way, alkoxides of metals selected from the group consisting of tin, aluminum, zirconium, and antimony are unstable because they are easily hydrolyzed by moisture in the air, and some are poorly soluble in organic solvents. However, it has not yet been widely used industrially.

The present invention was made in view of the above-mentioned circumstances, and its purpose is to provide a solution that can be purified even when using alcohol with a small number of carbon atoms, and that is easily hydrated by moisture in the air. It is an object of the present invention to provide a method for producing a solution of an alkoxide derivative of a metal selected from the group consisting of tin, aluminum, zirconium, and antimony, which exhibits excellent long-term stability without decomposition.

Another object of the present invention is to treat such a metal alkoxide derivative solution with an ion-exchange resin.
It is an object of the present invention to provide a method for obtaining a solution of an alkoxide derivative of a metal selected from the group consisting of tin, aluminum, zirconium and antimony with a higher purity.

[Means for Solving the Problems] The structure of the present invention that can solve the above object is to prepare a carboxylate of a metal element selected from the group consisting of tin, aluminum, zirconium, and antimony with a carbon number of 1. ~
The gist of this method is to dissolve or suspend the compound in alcohol No. 4, add one or more of monoethanolamine, jetanolamine and triethanolamine thereto, and conduct the reaction in the presence of ammonia.

Further, in another structure related to the present invention, a metal carboxylate selected from the group consisting of tin, aluminum, zirconium, and antimony is dissolved or suspended in an alcohol having 1 to 4 carbon atoms, and monoethanolamine is added to the solution or suspended in an alcohol having 1 to 4 carbon atoms. The gist of this method is that one or more of jetanolamine and triethanolamine are added and reacted in the presence of ammonia, and then the resulting alkoxide derivative solution is treated with an ion exchange resin.

[Function] Tin, aluminum, zirconium used in the present invention,
Examples of carboxylates of metals selected from the group consisting of antimony include carboxylates having 1 to 4 carbon atoms, specifically formic acid, acetic acid, propionic acid, butyric acid, etc.; Since acetate is the most preferred, the explanation will be given below by taking up acetate as a representative example.

In carrying out the present invention, a C1-C4 alcohol solution or suspension of an acetate of a metal selected from the group consisting of tin, aluminum, zirconium, and antimony is used.

Note that the acetate of a metal selected from the group consisting of tin, aluminum, zirconium, and antimony has relatively low solubility in alcohol, and is generally 0.1 to 2 mol to alcohol ILi having 1 to 4 carbon atoms. Preferably 0.2
~1 molar alcohol solution or suspension is preferred; however, as confirmed by the present inventors, acetate does not have to be completely dissolved in alcohol, but even when suspended in alcohol. This method takes advantage of the fact that the reaction can proceed satisfactorily in the presence of ammonia.

The acetate of a metal selected from the group consisting of tin, aluminum, zirconium, and antimony can be prepared by a conventional method, for example, by suspending the corresponding oxide or carbonate in an acetic acid aqueous solution and then heating it. After dissolving or suspending the hydrate in N,N-dimethylformamide and adding dry benzene, the benzene-water azeotrope is removed by distillation. , N-dimethylformamide is removed by heating to obtain anhydrous acetate, and zirconium acetate is prepared by adding zirconium chloride (IV) to water-free acetic acid.
) and then boiling, cooling and drying the resulting colorless crystals. Tin acetate (ff
) is made by suspending thallium acetate (CI) in acetic anhydride in the absence of moisture, adding tin iodide (ff), heating under reflux at approximately 80°C, and precipitating thallium iodide (r) after cooling.
The filtrate is concentrated under reduced pressure and then cooled to obtain needle-shaped tin acetate.

Furthermore, it can also be produced by directly reacting each oxide of the above-mentioned metals with acetic anhydride, or by heating an acetate hydrate under vacuum at 150 to 180°C.

One feature of the present invention is that the anhydrous acetate of a metal selected from the group consisting of tin, aluminum, zirconium, and antimony prepared as described above is
- 4 is dissolved or suspended in alcohol, a specific amine is added, and the reaction is carried out in the presence of the amine and also in the presence of ammonia. The amine used here is selected from one or more of monoethanolamine, jetanolamine, and triethanolamine. Even if it belongs to the ethanolamine class, N-methylethanolamine.

N,N-dimethylethanolamine, N,N-diethylethanolamine, N-propylethanolamine, N
, N-dipropylethanolamine, N,N-diisopropylethanolamine, etc., a gel-like substance is generated as the reaction progresses due to the introduction of ammonia.
It is not possible to obtain stable solutions of alkoxide derivatives of carbon a1-4 alcohols.

The preferred molar ratio of one or more of monoethanolamine, jetanolamine or triethanolamine used in the present invention and acetate is zirconium,
In the case of each group of tin (■), the range is 1:0.5 to 1:4, and in the case of each group of aluminum and antimony, it is 1:0.5 to 1.
:3 range, 1:0.5 to 1:2 for tin(n) salts
Particularly preferred are tin (■), tin (■),
In the case of aluminum, zirconium, and antimony, the ratio is in the range of 1:1 to 1:2.

The acetate of a metal selected from the group consisting of tin, aluminum, zirconium, and antimony obtained as described above is dissolved or suspended in an alcohol having 1 to 4 carbon atoms, and the above amine is added to the acetate of ammonia. When the reaction is carried out in the presence of fluorine, the formation of gel-like substances does not occur and a stable flucoxide conductor solution of a metal selected from the group consisting of tin, aluminum, zirconium and antimony is obtained. In particular, when the amount of amine is 1 to 2 moles per mole of metal ions constituting the metal alkoxide derivative, the stabilizing and solution-forming effects are remarkable.

The reaction itself employed in the present invention may be carried out by introducing ammonia gas. For example, an alcohol solution or suspension of an acetate anhydrate of a metal selected from the group consisting of tin, aluminum, zirconium, and antimony may be used. Ammonia gas is introduced into the liquid in the presence of the specific amine. The amount of ammonia introduced is preferably in excess of the theoretical equivalent, for example, in a ratio of 3.5 to 4.5 moles when the metal ion has an oxidation number of 3 per mole of acetate.

This reaction is exothermic and as the reaction progresses, the temperature rises and at the same time ammonium acetate is produced as a by-product. Most of this ammonium acetate is dissolved under the reaction conditions employed in the present invention, but if the ammonium acetate precipitates when the reaction is cooled, it can be filtered out to remove tin, aluminum, etc. A stable alcohol solution consisting of an alkoxide derivative of a metal selected from the group consisting of zirconium and antimony and an alcohol having 1 to 4 carbon atoms can be obtained.

The alcohol solution of the alkoxide derivative obtained in this way is stable for a long time without gelation, and is not easily hydrolyzed by moisture in the air. It can be obtained using other compatible organic solvents, such as alcohols, ketones, aromatic hydrocarbons (for example, toluene, benzene, xylene, etc.), chloroform, etc.

By the way, the alcohol solution of the alkoxide derivative obtained as described above contains acetic acid ions, mainly ammonium acetate, as impurities, but depending on the application, such acetic acid ions may be removed to obtain a solution with even higher purity. It is hoped that However, as mentioned above, with conventional metal alkoxides selected from the group consisting of tin, aluminum, zirconium, and antimony, recrystallization using vacuum distillation or organic solvents is difficult. It was thought that it was difficult to obtain a solution of high purity.The present inventors conducted further research and examination in order to establish a method for obtaining a solution of high purity through simple operations without using such physical treatments. , tin obtained as described above,
An alcoholic solution of a metal alkoxide derivative selected from the group consisting of aluminum, zirconium, and antimony can be easily treated with an anion exchange resin, whereby the amount of acetate ions present in the solution can be reduced to a metal (tin, 1/100 per mole of metal selected from the group consisting of aluminum, zirconium, and antimony
It has been found that the amount can be reduced to less than mol.

That is, another feature of the present invention is that an acetate of a metal selected from the group consisting of tin, aluminum, zirconium, and antimony is dissolved or suspended in a carbon a1-4 alcohol, and monoethanolamine, jetanolamine and one or more triethanolamines, preferably in the molar ratio of acetate to amine in the range of 1:0.5 to 1:4 in the case of zirconium, tin (rV) groups, aluminum, antimony, etc. For each group 1:0.
5 to 1:3, 1:0.5 for tin(II) salts
Highly pure and stable tin, characterized in that the reaction is carried out in the presence of ammonia by adding tin in the range of 1:2 to 1:2, and then the resulting solution is treated with an ion exchange resin;
The present invention provides a method for producing an alkoxide derivative solution using an apparatus comprising a group consisting of aluminum, zirconium, and antimony and an alcohol having 1 to 4 carbon atoms.

In the above purification method of the present invention, any anion exchange resin can be used as long as it can capture and remove acetate ions, which are impurities in the solution, by ion exchange. For example, a strong base having a terminal group of It is better to use a neutral anion exchange resin,
Particularly preferred are those having the former terminal group; examples of these ion exchange resins include Amberlyte IRA, Amberlyst A, and Diaion SA.

It is available on the market under trade names such as FA and DOWEX SAR.

The ion exchange resin treatment was carried out using the tin produced as described above,
This is carried out by contacting an alcoholic solution of a metal alkoxide derivative selected from the group consisting of aluminum, zirconium, and antimony with the anion exchange resin in a known manner. The most common method is to pass the obtained alkoxide derivative solution through a column packed with ion exchange resin. If particularly high purity purification is desired, such purification operations may be repeated several times.

By performing such ion exchange resin treatment, the acetate ion in the solution is reduced to 1/100 per mole of metal ions.
It can be significantly reduced to less than a molar level, making ideal purification possible.

[Examples] Hereinafter, the present invention will be specifically explained with reference to Examples, but the present invention is not limited by the following Examples.

Example 1 Zirconium tetrachloride ZrC in water-free acetic acid 6001
1n 233 g (1 mol) (manufactured by Kishida Chemical Co., Ltd.) is added and boiled. Hydrogen chloride is generated violently.

Cool after hydrogen chloride is no longer generated. The resulting crystals are quickly washed with acetic anhydride and then with ether to obtain zirconium acetate anhydride. This was suspended in methyl alcohol, and further monoethanolamine,
The first of jetanolamine or triethanolamine
Add and mix the amounts shown in the table, and add 0.21 ammonia gas.
After completion of the six reactions in which the mixture was blown for 7 minutes for 10 hours, the mixture was cooled to room temperature to obtain a methyl alcohol solution (product) of a zirconium methoxide derivative. The condition and storage stability of the product thus obtained are shown in Table 1.

(Leaving space below) Table 1 (Zirconium methoxide derivative) Stability ×: Within 1 week Δ: 1 to 2 weeks 0: Within 1 month O: Over 1 month Example 2 Vinegar 11jism (CH3COO) 2237 g (1 mol) (manufactured by Kishida Chemical Co., Ltd.) is suspended in 2 volumes of noralcohol, and the amounts of monoethanolamine, jetanolamine, or triethanolamine shown in Table 2 are added and mixed, and ammonia gas is added to 0.2! After completion of the 6 reactions in which the mixture was injected for 7 hours at L1 minute, the mixture was cooled to room temperature to obtain a methyl alcohol solution of a tin (If) methoxide derivative (Product A). The condition and storage stability of the product thus obtained were
Shown in the table.

Furthermore, oxygen gas was blown into the obtained product at a rate of 0.2 Jl/min for 5 hours, and the state and storage stability of the obtained methyl alcohol solution of the tin methoxide derivative (Product B) are shown in Table 3. .

(Margins below) Table 2 [j & (II) Methoxy side body: Product A) Stability ×: Within 1 week Δ: 1 to 2 weeks
O: Within 1 month -: Excluded from the target because it is obtained in gel form 3 Table 1 Methoxy circular conductor: Product B) Stability O: Within 1 month o: More than 1 month - Excluded from the target because it is obtained in gel form Excluded Comparative Example 1 Anhydrous zirconium acetate obtained in the same manner as in Example 1 was dissolved or suspended in 2 parts of methyl alcohol or inpropyl alcohol, and ammonia gas was blown in for 0.217 minutes without adding amines. The reaction was carried out by this. Upon reaction with methyl alcohol, the product obtained was a gel-like material. On the other hand, in the reaction with isobrobyl alcohol, a solution was obtained, but it was unstable as solid particles precipitated within one week.

Example 3 In the same manner as in the production of zirconium acetate anhydride in Example 1,
Zirconium formate anhydride or zirconium anhydride propionate obtained by replacing acetic acid with formic acid and propionic acid is dissolved or suspended in dimethyl alcohol, and further added to Table 4.5 of monoethanolamine, jetanolamine or triethanolamine. The indicated amounts were mixed and ammonia gas was blown in for 9 hours at 0.217 minutes. After completion of the reaction, the mixture was cooled to room temperature to obtain a methyl alcohol solution (product) of a zirconium methoxide derivative. The condition and storage stability of this product are shown in Table 4.5.

(Leaving space below) Table 4 (Zirconium methoxy stamp) Stability ×: Within 1 week Δ: 1 to 2 weeks o: Within 1 month o: More than 1 month Table 5 (Zirconium methoxy days 514) Stability Δ: l -2 weeks Within 1 month = 1 month or more - Excluded from the target because it is obtained in a gel-like form Example 4 Anhydrous zirconium acetate obtained in the same manner as in Example 1 was suspended in n-butyl alcohol 11, and further monomer was added. The amounts of ethanolamine, jetanolamine, or triethanolamine shown in Table 6 were mixed, and ammonia gas was blown in for 9 hours for 0 to 217 minutes. After the reaction was completed, the n-butyl alcohol of the zirconium butoxide derivative was cooled to room temperature. A solution (product) was obtained. The condition and storage stability of the product are shown in Table 6.

(Leaving space below) Table 6 (Zirconium butoxide derivative) Stability o: Within 1 month o: Over 1 month Example 5 Obtained in Example 1 (using 1 mole of monoethanolamine per 1 mole of zirconium acetate) Part of the methyl alcohol solution of zirconium methoxide derivative (liquid volume 5001, 36000 dew g of acetate ion CH3 (:00
-, containing 28 g as ZrO2), a strongly basic anion exchange resin, trade name Amberlite IRA-
20m intestine Φ filled with 410 (manufactured by Organo), 900
The mixture was passed through a Zesuri H column at a flow rate of 2.5 ml/17 min. The liquid obtained by repeating this operation six times has an acetic acid ion content of 125 mg (0.45% per oxide equivalent, !3/1000 mole per 1 mole of zirconium) from 36000 mg before treatment, and the impurity acetic acid The ion CHZ COO- was largely removed.

Example 6 Tin(II) formate 5n (HCOO) 2209 g (1
Mole) (manufactured by Kishida Chemical Co., Ltd.) was suspended in two volumes of isopropyl alcohol, further mixed with monoethanolamine, jetanolamine, or triethanolamine in the amount shown in Table 7, and ammonia gas was added at a rate of 0.21/min. Table 7 shows the condition and storage stability of the obtained isopropyl alcohol solution (product) of the fi (II) impropoxide derivative, which was infused for a period of time.

(Left below) Table 7 Table 1jl (n) Inpyropoxide derivative] Stability Δ: 1 to 2 weeks o: Within 1 month O: 1
Example 7 Aluminum ethoxide AI (OC2Hsh 162
g (1 mol) (manufactured by Kishida Chemical Co., Ltd.), 850 ml of acetic anhydride was added dropwise. Heating accelerates the reaction. Cooling of the mixture yields white aluminum acetate. This was dried at 100° C. for 5 hours under reduced pressure. This aluminum acetate was suspended in methyl alcohol or t-butyl alcohol.

Furthermore, monoethanolamine, jetanolamine, or triethanolamine was added in the amounts shown in Table 8, and ammonia was blown in for 9 hours at 0.217 minutes. After the reaction was completed, cooling resulted in a methyl alcohol solution of aluminum methoxide derivative and aluminum. A t-butyl alcohol solution (product) of a butoxide derivative was obtained. The condition and storage stability of the product thus obtained are shown in Table 8.

(Margin below) M8 Table (aluminum methoxide and butoxide groove conductor) Stability Δ: 1 to 2 weeks 0: Within 1 month o: 1 month or more -: Excluded from the target because it is obtained in a gel form Example 8 Example 7 Aluminum propionate obtained by the same procedure except that propionic acid was used instead of acetic acid was mixed with methyl alcohol or isopropyl alcohol 2f.
A methyl alcohol solution of aluminum methoxide derivative and aluminum propoxy An isopropyl alcohol solution (product) of the aluminum methoxide derivative was obtained.The state and storage stability of the product thus obtained are as shown in Table 8, and the aluminum methoxide derivative and the aluminum propoxide derivative gave almost the same results. Obtained.

Comparative Example 2 Aluminum acetate obtained in the same manner as in Example 7 was mixed with methyl alcohol 2! The reaction was carried out by suspending the mixture in L and blowing ammonia gas at 0.2 JL/min for 9 hours without adding any amines. The product obtained was a gel-like substance.

Example 9 Part of the methyl alcohol solution of the aluminum methoxide derivative obtained in Example 7 (using 1 mole of triethanolamine per mole of aluminum acetate) (58000 layer g of acetate ions in a liquid volume of 500 layer 1) Cl5COO
-, containing 26g of Al2O3) as a strong basic anion exchange resin (trade name: Amberly) IRA-410
(manufactured by Organo) 20mmΦ, 900mmH
column at a flow rate of 2.517 minutes. The liquid obtained by repeating this operation 7@
The acetate ion content, which was 000g, became 210g (0.81% in terms of oxide, 7/1000 mol per mol of aluminum), and the impurity acetate ion CH
3C00- was largely removed.

Example 1O Antimony(III) acetate 5b(CH3COO)32
99 g (1 mol) (manufactured by Kishida Chemical Co., Ltd.) was dissolved or suspended in 1 volume of methyl alcohol or t-butyl alcohol, and further monoethanolamine, diethanolamine, or triethanolamine was added in the amount shown in Table 9. ,
Ammonia gas was blown in at 0.21/min. After completion of the reaction, the mixture was cooled to obtain a methyl alcohol solution of an antimony methoxide derivative and a t-butyl alcohol solution (product) of an antimony butoxide derivative. The condition and storage stability of the product thus obtained are shown in Table 9.

(Leaving space below) Table 9 (Antimony methoxide and butoxide derivatives) Stability Δ: 1 to 2 weeks 0: Within 1 month O: 1 month or more Example 11 77 Timon (m) ethoxide 5b (OCzHs) 325
Butyric acid 9001 was added dropwise to 7 g (1 mol) (manufactured by Kishida Chemical Co., Ltd.). Heating accelerates the reaction. Cooling the mixture yields antimony butyrate. This was done under reduced pressure.
Dry at OO°C. This antimony butyrate was dissolved or suspended in methyl alcohol or isopropyl alcohol 11, and amines were added in the amount shown in Table 10, and then ammonia gas was blown in at 0.2 Jl/min for 8 hours.
When the reaction was completed and cooled, a methyl alcohol solution of an antimony methoxide derivative and an isopropyl alcohol solution (product) of an antimony isopropoxide derivative were obtained. Table 10 shows the condition and storage stability of the product thus obtained.

(Leaving space below) Table 10 (Antimony methoxide and impropoxy imprint) Stability Δ: 1 to 2 weeks 0: Within 1 month O: Over 1 month Example 12 420 g of thallium acetate (I) was dissolved in 2500 ml of acetic anhydride. Suspend and add tin iodide 51114 to this while stirring.
250 K (0.4 mol) (manufactured by Kishida Chemical Co., Ltd.) is added little by little. After the addition is complete, the mixture is refluxed at 80°C for 5 hours.

After further stirring at room temperature for 2 hours, thallium iodide (1)
was filtered, and the filtrate was concentrated under reduced pressure to obtain 5001. When this is cooled, tin acetate (rV) is precipitated. After filtering the crystals, they are washed with ether and dried in vacuum to form anhydrous tin acetate (
ff) was obtained. This tin acetate (ff) was suspended in methyl alcohol or isopropyl alcohol 11, and the amounts of monoethanolamine, jetanolamine, or triethanolamine shown in Table 11 were added thereto, and ammonia gas was added in 0.217 minutes. After the 9-hour blowing reaction was completed, the mixture was cooled to obtain a methyl alcohol solution of a tin (rV) methoxide derivative and an inpropyl alcohol solution (product) of a tin (IV) isopropoxide derivative. The condition and storage stability of this product are shown in Table 11.

11th Table 1j! (ff) Methoxide and isopropoxy conductor) Stability ×: Within 1 week
Δ: 1 to 2 weeks O: Within 1 month O: 1 month or more - Excluded from the target because it is obtained in the form of two gels Example 13 Example 1 except that 400 g of thallium (I) formate was used
The same operation as in 2 was performed to obtain tin formic anhydride (17).

This tin formate (ff) was suspended in ethyl alcohol 11, amines were added in amounts shown in Table 12, and ammonia gas was blown into the suspension.

After the reaction was completed, the mixture was cooled to obtain an ethyl alcohol solution (product) of a tin(IV) ethoxide derivative.

Table 12 shows the condition and storage stability of the product thus obtained.

(Left below) Section 12 Table 1 α-Liethoxy-Kokumizo conductor] Stability
Δ: 1 to 2 weeks 0: Within 1 month O: 1 month or more - Excluded from the subject because it is obtained in two gel form It is as follows.

(1) Tin, aluminum, zirconium, which could only be obtained in powder form or was extremely unstable,
It has become a goal to obtain an alkoxide derivative of a metal selected from antimony with an alcohol having 1 to 4 carbon atoms in a stable solution state.

(2) By treating this solution-state alkoxide derivative of a metal selected from tin, aluminum, zirconium, and antimony with an ion exchange resin, its purity can be dramatically increased.

(3) When a solution of a flucoxide derivative of a metal selected from tin, aluminum, zirconylaconium, and antimony is hydrolyzed by adding water, a fine powder of extremely high purity can be obtained, which is used for IC substrates, etc. It can be extremely effectively used as a material in the field of new ceramics such as alumina substrates and oxygen sensors, or in the field of functional thin films such as tin-antimony transparent conductive films.

Claims (4)

[Claims] (1) A carboxylate of a metal selected from the group consisting of tin, aluminum, zirconium, and antimony is dissolved or suspended in an alcohol having 1 to 4 carbon atoms, and monoethanolamine, diethanolamine, and triethanolamine are added to this. 1. A method for producing a metal alkoxide derivative solution, which comprises adding one or more kinds and carrying out a reaction in the presence of ammonia. (2) The method for producing a metal alkoxide derivative solution according to claim 1, wherein the carboxylic acid salt is a salt of an acid selected from the group consisting of formic acid, acetic acid, propionic acid, and butyric acid. (3) A metal carboxylate selected from the group consisting of tin, aluminum, zirconium, and antimony is dissolved or suspended in an alcohol having 1 to 4 carbon atoms, and monoethanolamine, diethanolamine, and triethanolamine are added to this. 1. A method for producing a metal alkoxide derivative solution, which comprises adding one or more kinds and reacting in the presence of ammonia, and then treating the resulting solution with an ion exchange resin. (4) The method for producing a metal alkoxide derivative solution according to claim 3, wherein the carboxylic acid salt is a salt of an acid selected from the group consisting of formic acid, acetic acid, propionic acid, and butyric acid.