JP2013032317A - Method for producing glycidyl ether - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a glycidyl ether in which a desalting step can be performed by simple filtration, so that the method is advantageous in regard to process and cost.SOLUTION: In the production method for obtaining a glycidyl ether by reacting an alcohol (B) represented by formula (1) or (2) with an epihalohydrin (C) in the presence of an alkali metal hydroxide (A), a reaction step in which the content of water is adjusted to 2-5 wt.% on the basis of the weights of (A), (B) and (C) and the reaction is initiated is included. In the formulae, Q represents the residue of a non-reducing di- or tri-saccharide; OA and AO represent an oxyalkylene group; n is 5-30; t is 2-4; Y represents the reaction residue of a diglycidyl ether; and the total number of OA and AO contained in (B) is 20-80 per one (Q).

Description

  The present invention relates to a method for producing glycidyl ether.

  As a method for producing glycidyl ether, (1) a two-stage method in which an epihalohydrin is subjected to ring-opening addition to alcohol in the presence of an acid catalyst, followed by intramolecular ring closure with an aqueous alkaline solution (Patent Document 1), or (2) alcohols There is known a one-step method (Patent Documents 2 and 3) in which halothane and epihalohydrin are reacted in the presence of an alkali metal hydroxide.

JP 57-31921 A JP 54-141708 A JP-A-5-163260

  In the method described in Patent Document 1 (two-stage method), an acidic catalyst is essential, so there are problems such as corrosion of metal equipment and operational safety, and after intramolecular ring closure with a base and a large amount of water. Since a refining step (washing with water) is required, there are problems in terms of process and cost. Furthermore, since a relatively large amount of halogen atoms (such as chlorine atoms) remain in the resulting glycidyl ether, there is a problem that it is difficult to use in the fields of electronics, electricity, paints and the like from the viewpoint of rust prevention.

  In the method described in Patent Document 2 (one-stage method), the remaining halogen atoms (chlorine atoms, etc.) are almost eliminated, but since a large amount of water (about 20% by weight, Examples) is used for the reaction, purification is performed. Water washing is essential for the process, and there are still problems in terms of process and cost.

  In the method described in Patent Document 3 (one-stage method), due to a side reaction due to the influence of moisture, in order to improve the tendency that the purity of glycidyl ether is lowered, a device for removing moisture in the reaction system has been devised. For this reason, the neutralized salt produced (usually sodium chloride) becomes fine, and it is impossible to use a filtration method for removal, and as in Patent Documents 1 and 2, a purification step by washing with water is essential. However, there are problems in terms of process and cost.

  That is, the object of the present invention is to provide a production method that is superior in terms of process and cost, because the desalting (removal of by-product neutralized salt) process that cannot be avoided in the production of glycidyl ether can be performed by simple filtration. It is to be.

The inventor of the present invention has reached the present invention as a result of intensive studies to solve the above problems.
That is, the production method of glycidyl ether of the present invention is characterized by reacting the alcohol (B) represented by the general formula (1) or (2) with the epihalohydrin (C) in the presence of the alkali metal hydroxide (A). In the production method of obtaining glycidyl ether,
Including a reaction step (1) in which the water content is adjusted to 2 to 5% by weight based on the weights of the alkali metal hydroxide (A), alcohol (B) and epihalohydrin (C) to start this reaction. The point is summarized.

  However, Q is a residue obtained by removing a hydrogen atom from t primary hydroxyl groups of a non-reducing di- or trisaccharide, OA or AO is an oxyalkylene group having 2 to 4 carbon atoms, n is an integer of 5 to 30, t represents an integer of 2 to 4, H represents a hydrogen atom, Y represents a reaction residue of diglycidyl ether having 10 to 50 carbon atoms, and the total number of OA and AO contained in the alcohol (B) is the residue (Q) When the number is 20 to 80 per one and a plurality of Y, (OA-) n, (-AO) n, Q, and t are contained in one molecule, each of the plurality may be the same or different. .

  According to the method for producing glycidyl ether of the present invention, granulation of by-product neutralized salt can be promoted and neutralized salt particles can be increased, so that desalting can be carried out by a simple filtration step. Therefore, according to the manufacturing method of the present invention, a special water washing treatment apparatus is not required, and a huge amount of drainage is not generated by the water washing treatment, and an advantage in terms of environment and cost can be obtained.

  In the method for producing glycidyl ether of the present invention, since an acid catalyst is not required, it is not necessary to consider corrosion of production equipment. Furthermore, the glycidyl ether obtained by the production method of the present invention has a halogen atom (chlorine atom or the like) content at a level that does not affect the rust-proof surface, and therefore can be used without problems in the fields of electronics, electricity, paints and the like.

<Alkali metal hydroxide (A)>
Examples of the alkali metal hydroxide (A) include lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide, and cesium hydroxide. Of these, sodium hydroxide and potassium hydroxide are preferable, and sodium hydroxide is more preferable from the viewpoint of granulation of neutralized salt (increase in particles).

  The amount of alkali metal hydroxide (A) used is such that the ratio of {base equivalent of alkali metal hydroxide (A) (eq.) / Equivalent of halogen of epihalohydrin (C) (eq.)} Is 0.7 to An amount of 1.1 is preferable, and an amount of 0.8 to 1.0 is more preferable. With this ratio, the neutralization step of excess alkali metal hydroxide (A) can be omitted, and excess epihalohydrin (C) can be removed by a dehydration step under reduced pressure or the like.

<Alcohol (B)>
Examples of di- or trisaccharides that can form a residue (Q) obtained by removing a hydrogen atom from t primary hydroxyl groups of a non-reducing di- or trisaccharide include sucrose, trehalose, isotrehalose, iso Saccharose, gentianose, raffinose, meletitose, planteose and the like are included. Of these, sucrose, trehalose, gentianose, raffinose and planteose are preferable, and sucrose and trehalose are more preferable from the viewpoint of desalting and filtering properties (meaning the property of being easily desalted by filtration; the same applies hereinafter). From the viewpoints of availability and cost, sucrose is particularly preferable.

  Examples of the oxyalkylene group having 2 to 4 carbon atoms (OA or AO) include oxyethylene, oxypropylene, oxybutylene, and a mixture thereof. Among these, oxyethylene, oxypropylene and a mixture thereof are preferable from the viewpoint of hydrophilicity and water resistance of the obtained diglycidyl ether, and from the viewpoint of desalting filterability, a mixture of oxyethylene and oxypropylene is further added. preferable.

  When oxypropylene and / or oxybutylene and oxyethylene are included, the content ratio (mol%) of oxyethylene is preferably 2 to 10, more preferably 4 to 8, based on the total number of moles of oxyalkylene groups. It is. In this case, it is preferable that oxypropylene and / or oxybutylene is located at the end away from the reaction residue (Q). That is, when (OA-) n and (-AO) n contain an oxyethylene group, it is preferable that the oxyethylene group is directly bonded to the reaction residue (Q). Moreover, when (OA-) n and (-AO) n contain a plurality of types of oxyalkylene groups, there is no limitation on the bonding order (block shape, random shape, and combinations thereof) and the content ratio of the oxyalkylene groups.

  n is preferably an integer of 5 to 30, more preferably an integer of 5 to 28, particularly preferably an integer of 8 to 25, and most preferably an integer of 10 to 25. Within this range, the desalting filterability is further improved.

  t is preferably an integer of 2 to 4, more preferably 3 or 4, and particularly preferably 3. Within this range, the desalting filterability is further improved. T corresponds to the number of primary hydroxyl groups of the di- or trisaccharide, and is, for example, 3 for sucrose, 2 for trehalose, and 4 for meretitose.

  The total number of OA and AO contained in the alcohol (B) is preferably 20 to 80, more preferably 20 to 70, particularly preferably 30 to 70, most preferably 30 per residue (Q). ~ 60. Within this range, the desalting filterability is further improved.

  The reaction residue (Y) of the diglycidyl ether having 10 to 50 carbon atoms includes a residue obtained by ring-opening reaction of two epoxy groups possessed by the diglycidyl ether having 10 to 50 carbon atoms.

As a reaction residue of such diglycidyl ether, 2,11-dihydroxy-4,9-dioxadodecylene {—CH ₂ CH (OH) CH ₂ OCH ₂ CH ₂ CH ₂ CH ₂ OCH ₂ CH ( _OH) CH 2 -}, 2,6,10- trihydroxy-4,8-di oxa undecylenic _{{-CH 2 CH (OH) CH} 2 OCH 2 CH (OH) CH 2 OCH 2 CH (OH) CH 2 - }, 2,10-dihydroxy-4,8-dioxa-6,6-dimethylundecylene {—CH ₂ CH (OH) CH ₂ OCH ₂ C (CH ₃ ) ₂ CH ₂ OCH ₂ CH (OH) CH ₂ —} , 2,13- dihydroxy-4,11-di oxa-tetramethyl decylene _{{-CH 2 CH (OH) CH} 2 OCH 2 CH 2 CH 2 CH 2 CH 2 CH 2 OCH 2 CH ( _H) CH 2 -}, 2,10- dihydroxy-4,8-dioxa-6-hydroxymethyl-6-ethyl undecylenic _{{-CH 2 CH (OH) CH} 2 OCH 2 C (C 2 H 5) (CH 2 OH) CH ₂ OCH ₂ CH (OH) CH ₂ —}, 2,10-dihydroxy-4,8-dioxa-6,6-bishydroxymethylundecylene {—CH ₂ CH (OH) CH ₂ OCH ₂ C (CH ₂ OH) ₂ CH ₂ OCH ₂ CH (OH) CH ₂ —} and polyoxyalkylene (glycol / alkylene oxide adduct, etc., having 4 to 44 carbon atoms, alkylene having 2 to 4 carbon atoms) reaction residue of diglycidyl ether Groups and the like.

  The alcohol (B) represented by the general formula (1) or (2) can be produced by applying a known chemical reaction.

  For example, among the alcohols (B), the alcohol (B1) represented by the general formula (1) includes 1 mol part of a non-reducing di- or trisaccharide (a1) and an alkylene oxide having 2 to 4 carbon atoms (a2). ) It can be produced by a method of obtaining the compound (a12) from the chemical reaction (1) with 20 to 80 mol parts.

  The alcohol (B2) represented by the general formula (2) is a chemical reaction between 2 mole parts of the compound (a12) {alcohol (B1)} and 1 mole part of the diglycidyl ether (a3) having 10 to 50 carbon atoms. From the compound (a123).

  As the non-reducing di- or trisaccharide (a1), the same disaccharide or trisaccharide that can constitute the reaction residue (Q) in the general formula (1) can be used, and the preferred range is also the same.

  As the alkylene oxide (a2), an alkylene oxide having 2 to 4 carbon atoms can be used, and examples thereof include ethylene oxide (EO), propylene oxide (PO), butylene oxide (BO), and mixtures thereof. Among these, from the viewpoint of hydrophilicity and water resistance of the obtained diglycidyl ether, EO, PO, and a mixture of EO and PO are preferable, and a mixture of EO and PO is more preferable.

  In the case of using a plurality of types of alkylene oxide, the order of reaction (block shape, random shape and a combination thereof) and the use ratio are not limited, but it is preferable to include a block shape or a combination of a block shape and a random shape. When EO is used, the usage ratio (mol%) of EO is preferably 2 to 10, more preferably 4 to 8, based on the total number of moles of alkylene oxide. When EO and PO or / and BO are included, it is preferable to react PO and / or BO after the reaction of EO to the non-reducing disaccharide or trisaccharide (a1).

  The amount (mole) of alkylene oxide (a2) used is preferably 20-80, more preferably 20-70, particularly preferably 30-70, most preferably per mole of non-reducing di- or trisaccharide (a1). Is 30-60. Within this range, the desalting filterability is further improved.

  For the addition reaction between the non-reducing di- or trisaccharide (a1) and the alkylene oxide (a2), a known method (Japanese Patent Application Laid-Open No. 2004-224945) or the like can be applied, and anionic polymerization, cationic polymerization or coordination can be performed. You may implement in any forms, such as coordinate anionic polymerization. These polymerization forms may be used alone or in combination according to the degree of polymerization.

  For the addition reaction of alkylene oxide (a2), a known reaction catalyst (JP 2004-224945 A) can be used. In addition, when using the amide demonstrated below as a reaction solvent, it is not necessary to use a reaction catalyst.

  When the reaction catalyst is used, the amount used (% by weight) is preferably 0.01 to 1, based on the total weight of the non-reducing di- or trisaccharide (a1) and the alkylene oxide (a2). Preferably it is 0.03-0.8, Most preferably, it is 0.05-0.6. When it is within this range, the economy (required production time, catalyst cost, etc.), the purity of the product (monodispersity, etc.), etc. are further improved.

  When a reaction catalyst is used, it is preferable to finally remove the reaction catalyst from the reaction product. As the removal method, an alkali adsorbent such as synthetic aluminosilicate {for example, trade name: Kyoward 700, Kyowa Chemical Industry ( Co., Ltd., "Kyoward" is a registered trademark of the company. } (JP-A-53-123499, etc.), a method of dissolving in a solvent such as xylene or toluene and washing with water (JP-B-49-14359, etc.), a method using an ion exchange resin (JP-A-51 No. 23211, etc.) and a method of filtering neutralized salts (hydrochloride, sulfate, carbonate, etc.) produced by neutralizing the reaction catalyst with an acid (mineral acid, carbon dioxide, etc.) (Japanese Patent Publication No. 52-33000) Publication etc.).

  The remaining amount of the reaction catalyst can be managed by the CPR (Controlled Polymerization Rate) value described in JIS K1557-4: 2007, the CPR value is preferably 20 or less, more preferably 10 or less, particularly preferably 5 or less, Most preferably, it is 2 or less.

  A reaction solvent can be used in the step of the addition reaction of alkylene oxide (a2). As the reaction solvent, those having no active hydrogen are preferred, and more preferably those which dissolve the product produced by the reaction with the non-reducing disaccharide or trisaccharide (a1), alkylene oxide (a2) and (a2). Is preferred.

  As such a reaction solvent, alkyl amides having 3 to 8 carbon atoms and heterocyclic amides having 5 to 7 carbon atoms can be used.

  Examples of the alkylamide include N, N-dimethylformamide (DMF), N, N-dimethylacetamide, N, N-diethylacetamide, N-methyl-N-propylacetamide, 2-dimethylaminoacetaldehyde dimethylacetal and the like.

  Examples of the heterocyclic amide include N-methylpyrrolidone, N-methyl-ε-caprolactam, and N, N-dimethylpyrrolecarboxylic acid amide.

  Of these, alkylamide and N-methylpyrrolidone are preferred, DMF, N, N-dimethylacetamide and N-methylpyrrolidone are more preferred, DMF and N-methylpyrrolidone are most preferred, and DMF is most preferred.

  When a reaction solvent is used, the amount used (% by weight) is preferably 20 to 200, more preferably 40 to 180, based on the weight of the non-reducing di- or trisaccharide (a1) and the alkylene oxide (a2). Especially preferably, it is 60-150.

  When a reaction solvent is used, it is preferable to remove the reaction solvent after the reaction. The residual amount (% by weight) of the reaction solvent is preferably 0.1 or less, more preferably 0.05 based on the weight of the non-reducing di- or trisaccharide (a1) and alkylene oxide (a2). Hereinafter, it is particularly preferably 0.01 or less. The residual amount of the reaction solvent can be determined by gas chromatography using an internal standard substance.

  Examples of the method for removing the reaction solvent include the method described in JP-A-2005-132916.

  Examples of the diglycidyl ether (a3) having 10 to 50 carbon atoms include tetramethylene diglycidyl ether, glycerin diglycidyl ether, 2,2-dimethylpropylene diglycidyl ether, hexamethylene diglycidyl ether, trimethylolpropane diglycidyl ether, penta Examples include erythritol diglycidyl ether and polyoxyalkylene (glycol / alkylene oxide adduct, etc., having 4 to 44 carbon atoms, alkylene having 2 to 4 carbon atoms) diglycidyl ether.

  A known reaction vessel (JP 2004-224945 A) or the like can be used for the reaction. As the reaction atmosphere, it is preferable that the inside of the reaction apparatus is evacuated or dried in an inert gas (argon, nitrogen, carbon dioxide, etc.) atmosphere before introducing the alkylene oxide (a2) into the reaction system. Moreover, as reaction temperature (degreeC), 80-150 are preferable, More preferably, it is 90-130. The reaction pressure (gauge pressure: MPa, hereinafter the same) is preferably 0.8 or less, more preferably 0.5 or less.

  The end point of the reaction can be confirmed by the following method. That is, when the reaction temperature is kept constant for 15 minutes, the reaction end point is determined when the decrease in the reaction pressure becomes 0.001 MPa or less. The required reaction time is usually 4 to 12 hours.

  The alcohol (B2) represented by the general formula (2) is obtained by a chemical reaction between 2 mol parts of the compound (a12) {alcohol (B1)} and 1 mol part of the diglycidyl ether (a3) having 10 to 50 carbon atoms. Although it can be produced, the same reaction conditions and reaction catalyst as the reaction of the non-reducing disaccharide or trisaccharide (a1) and the alkylene oxide (a2) described above can be applied to this reaction.

  As diglycidyl ether (a3), butylene glycol diglycidyl ether, glycerin diglycidyl ether, 2,2-dimethylpropanediol diglycidyl ether, hexanediol diglycidyl ether, trimethylolpropane diglycidyl ether, pentaerythritol diglycidyl ether and Examples include polyoxyalkylene (glycol / alkylene oxide adduct, etc., having 4 to 44 carbon atoms, alkylene having 2 to 4 carbon atoms) diglycidyl ether and the like.

<Epihalohydrin (C)>
Epihalohydrin (C) includes epichlorohydrin, epibromohydrin and the like. Of these, epichlorohydrin is preferred.

  The amount of alcohol (B) and epihalohydrin (C) used is preferably such that the molar ratio of alcohol (B) / epihalohydrin (C) is 0.25 to 1, more preferably 0.33 to 1. is there. If it is this ratio, a desalting filtration process can be implemented simply.

  Prior to the start of the reaction step (1), the water content (wt%) is adjusted to 2-5 based on the weight of the alkali metal hydroxide (A), alcohol (B) and epihalohydrin (C). It is preferable to adjust to 2.5 to 4.5, particularly preferably 3 to 4. Within this range, the produced neutralized salt crystallizes greatly and can be easily removed by a desalting filtration step (for example, filter paper No. 2: manufactured by ADVANTEC, reserved particle diameter: 5 μm).

  In the reaction step (1), water is by-produced together with the neutralized salt. However, if the water content is within the above range at the start of the reaction, it may be exceeded in the middle of the reaction.

  When water is present in the reaction system, the side reaction described in Patent Document 3 (Japanese Patent Laid-Open No. 5 (1993) -163260) occurs, and some glycidyl groups (epoxy groups) introduced to the alcohol (B) by an ether bond are others. It is considered that the ring-opening reaction with the hydroxyl group of alcohol (B) of the compound results in partial multimerization, but it is derived from the alcohol (B2) represented by the general formula (2) even if multimerization occurs. Since a compound similar to the glycidyl ether to be obtained (reactive residue (Y) is different) is obtained, it is not a big problem.

  The confirmation of the reaction end point in the reaction step (1) can be performed by the following method or the like. That is, when the pH of the reaction solution is measured and becomes 7 to 8, the reaction end point is reached. The required reaction time is usually 3 to 12 hours. In addition, pH can be measured by attaching a reaction liquid directly to a litmus paper and observing a color change (20-30 degreeC).

In the reaction step (1), the reaction conditions applied in the dehydrohalogenation reaction with a base (Willson synthesis method: the reaction is driven by neutralizing the hydrogen halide sequentially generated during the reaction with a base) are applied as they are. it can.
As the reaction vessel, it is preferable to use a reaction vessel capable of heating / cooling, stirring and dropping (press-fitting).
As reaction temperature (degreeC), about 30-90 are preferable, More preferably, it is 50-70.
As the reaction atmosphere, it is preferable to make the inside of the reaction apparatus an atmosphere of inert gas (argon, nitrogen, carbon dioxide, etc.) before introducing epihalohydrin into the reaction system.

<Desalting and filtration step>
The production method of the present invention preferably includes, after the reaction step (1), a desalting filtration step (2) in which the neutralized salt produced as a by-product in the reaction step (1) is removed by filtration. Subsequent to the reaction step (1), the water content is reduced to 0.2% (preferably 0.1, more preferably 0.05)% by weight or less based on the weight of the obtained glycidyl ether, and then the reaction step. It includes a desalting filtration step (2) in which the neutralized salt produced as a by-product in (1) is removed by filtration.

A known method can be applied to the filtration, and normal natural filtration or vacuum filtration (suction filtration) may be used. Known filter media and filtration devices can be applied as they are.
As filtration temperature (degreeC), about 30-100 are preferable, More preferably, it is 50-90.

Subsequent to the reaction step (1), when the water content is 0.2% by weight or less based on the weight of the obtained glycidyl ether, the dehydration method is not limited, but the distillation under reduced pressure (dehydration under reduced pressure) ) Is preferred. Distillation under reduced pressure (dehydration under reduced pressure) can be removed together with water even if excess epihalohydrin (C) remains.
When distilling off under reduced pressure, the pressure {gauge pressure (hereinafter the same)} is preferably about -0.05 to -0.098 MPa, and the temperature is preferably about 60 to 100 ° C.

  The water content (% by weight) can be measured by a known method, for example, by the Karl Fischer method (JIS K0113: 2005, coulometric titration method).

  When excess alkali metal hydroxide (A) remains at the end of the reaction step (1), it is preferably removed. As a removal method, the removal method of “reaction catalyst that can be used for addition reaction of alkylene oxide (a2)” described in the production method of alcohol (B) can be applied. Among these, a method of filtering a neutralized salt (hydrochloride, sulfate, carbonate, etc.) produced by neutralizing an alkali metal hydroxide with an acid (mineral acid, carbon dioxide, etc.) is preferable. If the method of filtering is applied, since it can filter with the neutralized salt byproduced by reaction process (1), it is efficient. The residual amount may be further reduced by treating the alkali metal hydroxide (A) with an alkali adsorbent instead of or together with the filtration method.

  In addition, when neutralizing an alkali metal hydroxide with an acid, examples of acids include mineral acids (hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, etc.), organic acids (formic acid, acetic acid, propionic acid, benzoic acid, salicylic acid, terephthalic acid, Oxalic acid, malonic acid, adipic acid, succinic acid, lactic acid, etc.) can be used.

  The remaining amount of the alkali metal hydroxide (A) can be managed by a CPR (Controlled Polymerization Rate) value described in JIS K1557-4: 2007. The CPR value is preferably 20 or less, more preferably 10 or less, particularly preferably 5 or less, and most preferably 2 or less.

  The glycidyl ether obtained by the production method of the present invention can be used in various fields, for example, reactions for producing various surfactants (antifoaming agents, leveling agents, emulsifiers, wetting agents, antifogging agents, dispersing agents, etc.). It can be used as a property modifier. In addition, when added to a baked paint such as an electrodeposition paint, it can be directly bonded to the paint resin to give wettability and the like, and to exert an effect of capturing chlorine atoms and the like.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to this. Parts and% represent parts by weight and% by weight, respectively.

<Production Example 1>
In a pressure-resistant reaction vessel capable of stirring, heating, cooling, dripping, pressurization with nitrogen gas, etc. and depressurization with a vacuum pump, 342 parts (1 mol part) of purified granulated sugar {manufactured by Taikaku Co., Ltd., hereinafter the same} After putting 1000 parts by Mitsubishi Gas Chemical Co., Ltd., the same below}, the operation of pressurizing with nitrogen gas to 0.4 MPa with a gauge pressure and discharging to 0.02 MPa was repeated three times ( Hereinafter referred to as nitrogen substitution). Thereafter, the temperature was raised to 100 ° C. while stirring, and 1160 parts (20 mole parts) of PO (propylene oxide, the same shall apply hereinafter) was added dropwise at this temperature over 6 hours, and stirring was continued for 3 hours at the same temperature. The remaining PO was reacted. Next, DMF was removed under reduced pressure at 120 ° C. to obtain alcohol (B11) (sucrose / PO 20 mol adduct).

<Production Example 2>
Into a pressure resistant reactor similar to Production Example 1, 342 parts (1 mole part) of purified granulated sugar and 1000 parts of DMF were added, and then nitrogen substitution was performed. Thereafter, the temperature was raised to 100 ° C. with stirring, and at this temperature, 88 parts (2 mole parts) of EO (ethylene oxide, the same shall apply hereinafter) was added dropwise over 1 hour, and PO1624 parts (28 mole parts) was added over 8 hours. Then, stirring was continued for 3 hours at the same temperature to react with the remaining PO. Next, DMF was removed under reduced pressure at 120 ° C. to obtain alcohol (B12) (sucrose / EO 2 mol / PO 28 mol adduct).

<Production Example 3>
In the same pressure resistant reactor as in Production Example 1, 2054 parts (1 mole part) of alcohol (B12) (sucrose / EO2 mole / PO28 mole adduct) and potassium hydroxide {reagent special grade, manufactured by Wako Pure Chemical Industries, Ltd. The amount used was expressed as a pure equivalent amount excluding moisture. same as below. } 8 parts were added to perform nitrogen substitution, and dehydration was performed at 120 ° C. under reduced pressure of 0.6 to 1.3 kPa. Subsequently, PO1508 parts (26 mol parts) were added dropwise over 6 hours at 100 ° C. with reduced pressure. Next, 288 parts (4 mole parts) of BO (butylene oxide, the same shall apply hereinafter) was added dropwise over 6 hours, and stirring was further continued at 120 ° C. for 4 hours. Next, after adding 80 parts of deionized water at 90 ° C., 180 parts of Kyoward 700 was added and stirred at the same temperature for 1 hour. Next, at the same temperature, no. The filter was filtered using 2 filter papers {manufactured by Toyo Filter Paper Co., Ltd.} to remove Kyoward 700, and dehydrated at 120 ° C. under reduced pressure of 1.3 to 2.7 kPa for 1 hour (hereinafter abbreviated as Kyoward treatment and dehydration). To obtain alcohol (B13) (sucrose / EO2 mol / PO54 mol / BO4 mol adduct).

<Production Example 4>
Into a pressure-resistant reaction vessel similar to Production Example 1, 2170 parts (1 mole part) of alcohol (B12) (sucrose / EO2 mole / PO28 mole adduct) and 10 parts of potassium hydroxide were added to perform nitrogen substitution, and Dehydration was performed at 120 ° C. under reduced pressure of 0.6 to 1.3 kPa. Subsequently, 2100 parts (50 mol parts) of PO was added dropwise over 7 hours at 100 ° C. with reduced pressure, and stirring was further continued for 4 hours at 120 ° C. Next, Kyoward treatment and dehydration were performed to obtain alcohol (B14) (sucrose / EO 2 mol / PO 78 mol adduct).

<Production Example 5>
Into a pressure-resistant reaction vessel similar to Production Example 1, 504 parts (1 mole part) of meretitol {reagent special grade, manufactured by Wako Pure Chemical Industries, Ltd.} and 1500 parts of DMF were added, and then nitrogen substitution was performed. Thereafter, the temperature was raised to 100 ° C. while stirring, and then 2320 parts (40 mole parts) of PO was added dropwise at this temperature over 10 hours, and stirring was further continued for 3 hours at the same temperature to react with the remaining PO. Next, DMF was removed under reduced pressure at 120 ° C. to obtain alcohol (B15) (meletitol / PO 40 mol adduct).

<Production Example 6>
Into a pressure-resistant reaction vessel similar to Production Example 1, 2824 parts (1 mole part) of alcohol (B15) (meletose / PO 40 mole adduct) and 10 parts of potassium hydroxide were added, and nitrogen substitution was performed. And dehydrated under reduced pressure of 0.6 to 1.3 kPa. Next, at 100 ° C. under reduced pressure, 220 parts (5 mol parts) of EO was added dropwise over 3 hours, 1450 parts (25 mol parts) of PO was further added dropwise over 7 hours, and stirring was further continued at 120 ° C. for 4 hours. It was. Next, Kyoward treatment and dehydration were carried out to obtain alcohol (B16) (meletose / PO 40 mol / EO 5 mol / PO 25 mol adduct).

<Production Example 7>
Into a pressure-resistant reaction vessel similar to Production Example 1, 342 parts (1 mole part) of trehalose {special reagent grade, manufactured by Wako Pure Chemical Industries, Ltd.} and 2000 parts of DMF were added, and then nitrogen substitution was performed. Thereafter, the temperature was raised to 100 ° C. while stirring, and then 2900 parts (50 mole parts) of PO was dropped at this temperature over 6 hours, and stirring was further continued for 3 hours at the same temperature to react with the remaining PO. Next, DMF was removed under reduced pressure at 120 ° C. to obtain alcohol (B17) (trehalose / PO 50 mol adduct).

<Production Example 8>
In a pressure resistant reaction vessel similar to Production Example 1, 3004 parts (2 mole parts) of alcohol (B11) (sucrose / PO 20 mole adduct) and 4 parts of potassium hydroxide were added to perform nitrogen substitution, and the temperature was further increased to 120 ° C. After dehydrating under a reduced pressure of 0.6 to 1.3 kPa, cooling to about 50 ° C., polyoxypropylene glycol (7 mol) diglycidyl ether {Gliciere PP-300P, manufactured by Sanyo Chemical Industries, Ltd., epoxy An equivalent amount of 290 g / eq, “Glicier” is a registered trademark of the company} 580 parts (1 mole part) was added, and the atmosphere was replaced with nitrogen. Thereafter, the mixture was reacted at 120 ° C. for 8 hours with stirring. Next, Kyoward treatment and dehydration were carried out to obtain alcohol (B21) {(B11) 2 mol / (PP-300P) 1 mol adduct}.

<Production Example 9>
In a pressure-resistant reaction vessel similar to Production Example 1, 5648 parts (2 mole parts) of alcohol (B15) (meletose / PO 40 mole adduct) and 7 parts of potassium hydroxide were added, and nitrogen substitution was performed. After dehydrating under reduced pressure of 0.6 to 1.3 kPa, cooling to about 50 ° C., polyoxypropylene glycol (3 mol) diglycidyl ether {Epiol P-200, manufactured by NOF Corporation, epoxy equivalent 155 g / eq, “Epiol”, which is a registered trademark of the same company, was added in 310 parts (1 mole part), followed by nitrogen substitution. Thereafter, the mixture was reacted at 120 ° C. for 8 hours with stirring. Next, Kyoward treatment and dehydration were performed to obtain alcohol (B22) {(B15) 2 mol / (P-200) 1 mol adduct}.

<Production Example 10>
In a pressure-resistant reaction vessel similar to Production Example 1, 6484 parts (2 mole parts) of alcohol (B17) (trehalose / PO 50 mole adduct) and 8 parts of potassium hydroxide were added to perform nitrogen substitution. After dehydrating under reduced pressure of 0.6 to 1.3 kPa, cooling to about 50 ° C., 1,6HD-DEP (D) {hexamethylene glycol diglycidyl ether, manufactured by Yokkaichi Gosei Co., Ltd., epoxy equivalent 116 g / Eq} 232 parts (1 mole part) was added, and the atmosphere was replaced with nitrogen. Thereafter, the mixture was reacted at 120 ° C. for 8 hours with stirring. Next, Kyoward treatment and dehydration gave alcohol (B23) {(B17) 2 mol / {1,6HD-DEP (D)} 1 mol adduct}.

<Example 1>
In the same pressure resistant reaction vessel as in Production Example 1, 1502 parts (1 mole part) of alcohol (B12) obtained in Production Example 2 and sodium hydroxide {reagent special grade, manufactured by Wako Pure Chemical Industries, Ltd., purity of about 97 wt. %,same as below. } 61.9 parts (1.5 mole parts) and 84 parts of water were charged, and 167 parts (1.8 mole parts) of epichlorohydrin {manufactured by Kashima Chemical Co., Ltd.} was added dropwise over 3 hours while stirring at 50 ° C. did. Next, stirring was continued at 60 ° C. for 5 hours, and the pH of the reaction system was 7 to 8 {Litmus test paper (manufactured by TOYO ROSHI CO. LTD, product name: UNIV PH 1-11). same as below. } Was confirmed. Next, after dehydration at 80 ° C. under reduced pressure of 0.6 to 1.3 kPa (water content: 0.03% by weight), suction filtration with filter paper (filter paper No. 2: manufactured by ADVANTEC, reserved particle diameter: 5 μm, The same applies hereinafter) to obtain glycidyl ether {uniformly transparent liquid} (G-1).

  The epoxy equivalent (g / eq.) Of glycidyl ether (G-1) was measured in accordance with 1250 (epoxy equivalent was JIS K7236: 1995, (Epoxy equivalent test method for epoxy resin)). The same applies hereinafter. Moreover, the total chlorine content of glycidyl ether (G-1) was measured based on {total chlorine content is JIS K7243-3: 2005 (how to obtain chlorine content of epoxy resin)]. Hereinafter, the same} was 0.1% by weight.

<Example 2>
A pressure-resistant reaction vessel similar to Production Example 1 was charged with 3850 parts (1 mole part) of alcohol (B13) obtained in Production Example 3, 82.5 parts (2 mole parts) of sodium hydroxide and 130 parts of water, and 50 While stirring at ° C., 204 parts (2.2 parts by mole) of epichlorohydrin was added dropwise over 4 hours. Subsequently, stirring was continued at 60 ° C. for 5 hours, and it was confirmed that the pH of the reaction system became 7-8. Next, after dehydration at 80 ° C. under reduced pressure of 0.6 to 1.3 kPa (water content: 0.02 wt%), suction filtration with filter paper is performed to obtain glycidyl ether {homogeneous transparent liquid} (G-2) Got.

  The epoxy equivalent (g / eq.) Of glycidyl ether (G-2) was 2400, and the total chlorine content was 0.08% by weight.

<Example 3>
In a pressure resistant reactor similar to Production Example 1, 4954 parts (1 mole part) of alcohol (B14) obtained in Production Example 4, 82.5 parts (2 mole parts) of sodium hydroxide and 110 parts of water were charged, 50 185 parts (2 mole parts) of epichlorohydrin was added dropwise over 4 hours while stirring at ° C. Subsequently, when stirring was continued at 60 ° C. for 5 hours, the pH of the reaction system became 11. Furthermore, when stirring was continued at the same temperature for 3 hours, pH 10 was confirmed. Then, when 8 parts of lactic acid {50% by weight aqueous solution, “Musashino lactic acid 50”, manufactured by Musashino Chemical Laboratory Co., Ltd.} was added and stirred, it was confirmed that the pH of the reaction system became 7-8. Next, after dehydration at 80 ° C. under reduced pressure of 0.6 to 1.3 kPa (water content: 0.02% by weight), suction filtration with filter paper was performed to obtain glycidyl ether {uniformly transparent liquid}.

  The epoxy equivalent (g / eq.) Of glycidyl ether (G-3) was 3440, and the total chlorine content was 0.1% by weight.

<Example 4>
In the same pressure resistant reactor as in Production Example 1, 4494 parts (1 mol) of alcohol (S6) obtained in Production Example 6, 61.9 parts (1.5 mol) of sodium hydroxide and 145 parts of water were charged. While stirring at 50 ° C., 158 parts (1.7 mole parts) of epichlorohydrin was added dropwise over 4 hours. Subsequently, stirring was continued at 60 ° C. for 5 hours, and it was confirmed that the pH of the reaction system became 7-8. Next, after dehydration at 80 ° C. under reduced pressure of 0.6 to 1.3 kPa (water content: 0.02% by weight), suction filtration with a filter paper is performed to obtain glycidyl ether {homogeneous transparent liquid} (G-4) Got.

  The epoxy equivalent (g / eq.) Of glycidyl ether (G-4) was 3580, and the total chlorine content was 0.12% by weight.

<Example 5>
A pressure-resistant reaction vessel similar to Production Example 1 was charged with 3584 parts (1 mole part) of alcohol (21) obtained in Production Example 8, 82.5 parts (2 mole parts) of sodium hydroxide and 100 parts of water, and 50 While stirring at ° C., 204 parts (2.2 parts by mole) of epichlorohydrin was added dropwise over 4 hours. Subsequently, stirring was continued at 60 ° C. for 5 hours, and it was confirmed that the pH of the reaction system became 7-8. Next, after dehydration at 80 ° C. under reduced pressure of 0.6 to 1.3 kPa (water content: 0.02% by weight), suction filtration with filter paper is performed to obtain glycidyl ether {homogeneous transparent liquid} (G-5). Got.

  The epoxy equivalent (g / eq.) Of glycidyl ether (G-5) was 2340, and the total chlorine content was 0.07% by weight.

<Example 6>
In a pressure-resistant reaction vessel similar to Production Example 1, 5958 parts (1 mole part) of alcohol (B22) obtained in Production Example 9, 82.5 parts (2 mole parts) of sodium hydroxide and 200 parts of water were charged. While stirring at ° C., 204 parts (2.2 parts by mole) of epichlorohydrin was added dropwise over 4 hours. Subsequently, stirring was continued at 60 ° C. for 5 hours, and it was confirmed that the pH of the reaction system became 7-8. Next, after dehydration at 80 ° C. under reduced pressure of 0.6 to 1.3 kPa (water content: 0.02% by weight), suction filtration with filter paper is performed to obtain glycidyl ether {homogeneous transparent liquid} (G-6) Got.

  The epoxy equivalent (g / eq.) Of glycidyl ether (G-6) was 3800, and the total chlorine content was 0.11% by weight.

<Example 7>
In a pressure-resistant reaction vessel similar to Production Example 1, 6716 parts (1 mole part) of alcohol (B23) obtained in Production Example 10, 82.5 parts (2 mole parts) of sodium hydroxide and 150 parts of water were charged, 50 While stirring at ° C., 204 parts (2.2 parts by mole) of epichlorohydrin was added dropwise over 4 hours. Subsequently, stirring was continued at 60 ° C. for 5 hours, and it was confirmed that the pH of the reaction system became 7-8. Next, after dehydration at 80 ° C. under reduced pressure of 0.6 to 1.3 kPa (water content: 0.03% by weight), suction filtration with filter paper is performed to obtain glycidyl ether {homogeneous transparent liquid} (G-7) Got.

  The epoxy equivalent (g / eq.) Of glycidyl ether (G-7) was 4300, and the total chlorine content was 0.14% by weight.

<Comparative Example 1>
The same method as in Example 1 was repeated except that 84 parts of water was not added, but suction filtration could not be performed due to clogging with filter paper, and a reaction product could not be obtained.

<Comparative example 2>
The same method as in Example 5 was repeated except that 100 parts of water was not added. However, suction filtration could not be performed due to clogging with filter paper, and a reaction product could not be obtained.

  The method for producing glycidyl ether of the present invention requires very little man-hours for purification and separation in the final step of production, and generates almost no industrial waste. In addition, the total chlorine content is low, and it is extremely useful as a raw material for fields such as electronics, electricity, and paints.

Claims (4)

In the production method of obtaining glycidyl ether by reacting the alcohol (B) represented by the general formula (1) or (2) with the epihalohydrin (C) in the presence of the alkali metal hydroxide (A),
Including a reaction step (1) in which the water content is adjusted to 2 to 5% by weight based on the weights of the alkali metal hydroxide (A), alcohol (B) and epihalohydrin (C) to start this reaction. The manufacturing method characterized by the above-mentioned.

However, Q is a residue obtained by removing a hydrogen atom from t primary hydroxyl groups of a non-reducing di- or trisaccharide, OA or AO is an oxyalkylene group having 2 to 4 carbon atoms, n is an integer of 5 to 30, t represents an integer of 2 to 4, H represents a hydrogen atom, Y represents a reaction residue of diglycidyl ether having 10 to 50 carbon atoms,
The total number of OA and AO contained in the alcohol (B) is 20 to 80 per residue (Q), and Y, (OA-) n, (-AO) n, Q, and t are in one molecule. When plural are included, each of the plural may be the same or different. Subsequent to the reaction step (1), based on the weight of the obtained glycidyl ether, the water content is reduced to 0.2% by weight or less, and the neutralized salt by-produced in the reaction step (1) is filtered. The manufacturing method of Claim 1 including the desalting filtration process (2) to remove. The residue (Q) obtained by removing a hydrogen atom from t primary hydroxyl groups of a non-reducing di- or trisaccharide is a residue obtained by removing a hydrogen atom from primary hydroxyl groups of sucrose. Production method. The method according to any one of claims 1 to 3, wherein the alkali metal hydroxide (A) is sodium hydroxide and the epihalohydrin (C) is epichlorohydrin.