WO2013099109A1 - ポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法 - Google Patents
ポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法 Download PDFInfo
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- WO2013099109A1 WO2013099109A1 PCT/JP2012/007599 JP2012007599W WO2013099109A1 WO 2013099109 A1 WO2013099109 A1 WO 2013099109A1 JP 2012007599 W JP2012007599 W JP 2012007599W WO 2013099109 A1 WO2013099109 A1 WO 2013099109A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/25—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/644—Arsenic, antimony or bismuth
- B01J23/6447—Bismuth
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/23—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of oxygen-containing groups to carboxyl groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/32—Polymers modified by chemical after-treatment
- C08G65/321—Polymers modified by chemical after-treatment with inorganic compounds
- C08G65/324—Polymers modified by chemical after-treatment with inorganic compounds containing oxygen
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/02—Anionic compounds
- C11D1/04—Carboxylic acids or salts thereof
- C11D1/06—Ether- or thioether carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2650/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G2650/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterized by the type of post-polymerisation functionalisation
Definitions
- the present invention relates to a method for producing a polyoxyalkylene alkyl ether carboxylic acid or a salt thereof.
- Polyoxyalkylene alkyl ether carboxylic acids and salts thereof are compounds having a carboxyl group at the end of polyoxyalkylene alkyl ether, and are excellent in foaming power and emulsifying power, and are cosmetics, emulsifiers, solubilizers, dispersants, gels. It is known as a surfactant that can be used in an agent, a cleaning base and the like.
- the properties of polyoxyalkylene alkyl ether carboxylic acids and salts thereof can be adjusted by changing the pH, are excellent in hard water resistance, and the aqueous solution is stable against various polyvalent metal ions such as aluminum. In addition, since the action on the skin is mild and the enzyme inhibitory property is low, it is expected to be applied in various other applications.
- Patent Documents 2 and 3 disclose polyoxyalkylene alkyl ether carboxylates that supply oxygen to a suspension containing a polyoxyalkylene ether, a noble metal catalyst, and an alkaline substance to catalytically oxidize the polyoxyalkylene alkyl ether. In which the supply of oxygen is started after the amount of dissolved oxygen in the suspension is reduced to 0 to 1 ppm, and then the amount of dissolved oxygen in the suspension is maintained at more than 0 ppm and not more than 1 ppm. It is disclosed.
- Patent Document 4 discloses a method for producing a polyoxyalkylene alkyl ether carboxylate using a continuous stirred tank reactor.
- the present invention has an oxidation reaction step of oxidizing a polyoxyalkylene alkyl ether with oxygen by supplying a gas containing oxygen into a suspension or solution containing the polyoxyalkylene alkyl ether having a depth of 200 mm or more.
- the gas supply rate is higher than 10 mol% / h and less than 15 mol% / h in terms of oxygen supply rate relative to the total number of moles of polyoxyalkylene alkyl ether and polyoxyalkylene alkyl ether carboxylic acid and its salt.
- Reaction rate (%) c2 ⁇ 100 / (c1 + c2) (A) [Wherein c1 is the molar concentration of polyoxyalkylene alkyl ether (mol / L) c2 is the total molar concentration (mol / L) of the polyoxyalkylene alkyl ether carboxylic acid and its salt. ]
- this embodiment includes both the case where a polyoxyalkylene alkyl ether carboxylic acid is produced under acidic conditions and the case where a polyoxyalkylene alkyl ether carboxylate is produced under alkaline conditions.
- a gas containing oxygen in a suspension or solution containing a polyoxyalkylene alkyl ether having a depth of 200 mm or more and a catalyst (hereinafter referred to as a gas) It has an oxidation reaction step of oxidizing the polyoxyalkylene alkyl ether with oxygen by supplying "oxygen-containing gas").
- the rate of supply of the oxygen-containing gas when the reaction rate represented by the following formula (A) (hereinafter simply referred to as “reaction rate”) is 50% or more and less than 70%. Reduce.
- Reaction rate (%) c2 ⁇ 100 / (c1 + c2) (A) [Wherein c1 is the molar concentration of polyoxyalkylene alkyl ether (mol / L) c2 is the total molar concentration (mol / L) of the polyoxyalkylene alkyl ether carboxylic acid and its salt. ]
- a gas containing oxygen is supplied as an oxidizing agent to a suspension or solution containing polyoxyalkylene alkyl ether.
- the oxygen supplied to the suspension or solution is consumed in the suspension or solution during the oxidation reaction.
- the supply rate of the oxygen-containing gas is reduced while the reaction rate is 50% or more and less than 70%.
- foaming of the suspension or solution can be suppressed. Production can be continued without interruption due to foaming of the solution, and therefore polyoxyalkylene alkyl ether carboxylic acid or a salt thereof can be produced efficiently and stably.
- Oxidation reaction process In the method for producing a polyoxyalkylene alkyl ether carboxylic acid or a salt thereof according to the present embodiment, an oxygen-containing gas is supplied into a suspension or solution containing the polyoxyalkylene alkyl ether to thereby convert the polyoxyalkylene alkyl ether into oxygen. Oxidation produces a polyoxyalkylene alkyl ether carboxylic acid or salt thereof.
- the depth of the suspension or solution is 200 mm or more, preferably 210 mm or more, more preferably from the viewpoint of production efficiency. Is 220 mm or more.
- the depth of the suspension or solution is preferably 10,000 mm or less, more preferably 5000 mm or less, and further preferably 1000 mm or less, from the viewpoint of production stability. From the above viewpoint, the depth of the suspension or solution is preferably 200 to 10,000 mm, more preferably 210 to 5000 mm, and still more preferably 220 to 1000 mm.
- the depth of the suspension or solution according to the present embodiment is the depth from the interface between the suspension phase or the liquid phase and the gas phase when stationary at the end of the supply of the reaction raw material to the deepest part of the inner wall of the reaction vessel. Say it.
- the effect of suppressing foaming of the suspension or solution is as long as the depth of the suspension or solution is 200 mm or more.
- the greater the depth the more prominent.
- the greater the depth of the suspension or solution the greater the amount of suspension or solution per interface between the suspension or liquid phase and the gas phase, so excess oxygen-containing gas can be present in the suspension or liquid phase. It is hard to come off and becomes easy to remain. For this reason, the foaming of the suspension or solution is considered to become more serious as the depth of the suspension or solution increases.
- the suspension or solution contains polyoxyalkylene alkyl ether as a reaction raw material.
- the suspension or solution contains polyoxyalkylene alkyl ether carboxylic acid and / or a salt thereof as a reaction product after the reaction starts.
- the polyoxyalkylene alkyl ether is preferably a compound represented by the following general formula (I).
- RO- (AO) n -H (I) [Wherein R is a hydrocarbon group having 4 to 30 carbon atoms, AO is an alkyleneoxy group having 2 to 4 carbon atoms, and n is an average added mole number of AO of 1 to 100. ]
- R is a hydrocarbon group having 4 to 30 carbon atoms
- AO is an alkyleneoxy group having 2 to 4 carbon atoms
- n is an average added mole number of AO of 1 to 100.
- the structure in the formula can be appropriately selected according to the performance, use, etc. of the target carboxylic acid or salt thereof.
- the carbon number of R is 4 or more, but is preferably 8 or more, more preferably 10 or more, from the viewpoint of increasing the foaming suppression effect and the viewpoint of obtaining excellent emulsifying power of the carboxylic acid or its salt. Yes, more preferably 12 or more.
- the carbon number of R is 30 or less, but is preferably 22 or less, more preferably 18 or less, and still more preferably 14 from the viewpoint of obtaining an excellent emulsifying power of the carboxylate or its salt. It is as follows.
- the carbon number of R is 4 to 30, but from the above viewpoint, from the viewpoint of increasing the foaming suppression effect, and from the viewpoint of obtaining excellent foamability and emulsifying power of the carboxylic acid or its salt, it is preferable. It is 8 to 22, more preferably 10 to 18, and still more preferably 12 to 14.
- Examples of the hydrocarbon group for R include an alkyl group and an alkenyl group. R may be linear or branched, and may be primary or secondary.
- R is preferably a linear or branched primary or secondary alkyl group or a linear or branched alkyl group from the viewpoint of increasing the foaming suppression effect and obtaining the excellent foamability and emulsifying power of the carboxylic acid or its salt.
- An alkenyl group more preferably a linear primary or secondary alkyl group or alkenyl group, still more preferably a linear primary alkyl group or alkenyl group, particularly preferably a linear 1 Grade alkyl group.
- AO is an alkyleneoxy group having 2 to 4 carbon atoms, but from the viewpoint of versatility and economy as a material, it is preferably an ethyleneoxy group having 2 carbon atoms, and 80 mol% or more of all AO is ethylene. More preferred is an oxy group.
- n is a number of 1 to 100, and is preferably 1 to 20 from the viewpoint of increasing the foaming suppression effect and from the viewpoint of obtaining excellent foaming properties and emulsifying power of the carboxylic acid or its salt. Preferably, it is 2-10.
- the suspension or solution may contain only a single type of polyoxyalkylene alkyl ether, or may contain a plurality of types of polyoxyalkylene alkyl ether.
- the concentration of the polyoxyalkylene alkyl ether in the suspension or solution is preferably 1% by mass or more, more preferably 5% by mass or more, and still more preferably 10% by mass from the viewpoint of improving production efficiency. That's it.
- the concentration of the polyoxyalkylene alkyl ether is preferably 40% by mass or less, more preferably 35% by mass or less, and still more preferably 30% by mass or less, from the viewpoint that handling properties are good. .
- the concentration of the polyoxyalkylene alkyl ether in the suspension or solution is preferably 1 to 40% by mass, more preferably 5 to 35% by mass, and still more preferably 10 to 30% by mass from the above viewpoint. is there.
- the polyoxyalkylene alkyl ether carboxylic acid or salt thereof which is a reaction product when produced using a compound represented by the general formula (I) as a polyoxyalkylene alkyl ether, has a structure represented by the following general formula (II). Can be represented.
- a ′ is an alkylene group having 1 to 3 carbon atoms, but the terminal —AO— in the general formula (I) is oxidized to form a structure of —A′—COO—.
- Examples of M which is a cation include alkali metal ions, alkaline earth metal ions, ammonium ions, hydrogen ions and the like.
- Examples of alkali metal ions include lithium ions, sodium ions, potassium ions, and the like.
- Examples of alkaline earth metal ions include magnesium ions and calcium ions.
- M, which is a cation is more preferably an alkali metal ion or a hydrogen ion from the viewpoint that the suspension or solution exhibits an appropriate viscosity at the time of production and the simplicity of the production process.
- the alkali metal ions sodium ions and potassium ions are preferable, and sodium ions are more preferable from the viewpoint of reducing the manufacturing cost.
- the suspension or solution may be a suspension containing a powdered noble metal-supported catalyst in which a noble metal as a catalyst is supported on a support.
- the noble metal as a catalyst is one or more elements selected from platinum group elements, specifically ruthenium, rhodium, It is preferable to contain one or more elements selected from palladium, osmium, iridium, and platinum, and it is particularly preferable to contain one or more elements selected from palladium and platinum.
- the noble metal-supported catalyst is further composed of tin, bismuth, selenium, tellurium, and antimony as catalyst components. It is preferable to contain one or more selected elements (hereinafter referred to as “catalyst second component”).
- the noble metal-supported catalyst contains the catalyst first component and the second component
- the noble metal-supported catalyst further contains one or more elements selected from rare earth elements (hereinafter referred to as “catalyst third component”) as the catalyst component. It is preferable.
- the carrier on which the catalyst component containing the noble metal as the first catalyst component is supported examples include inorganic carriers such as activated carbon, alumina, silica gel, activated clay, and diatomaceous earth.
- activated carbon having high durability against acidic substances or alkaline substances is preferable.
- the activated carbon one produced by a known method using sawdust, wood chips, charcoal, coconut shell charcoal, coal, peat charcoal, or the like as a raw material can be used.
- the supported amount of the noble metal as the first component of the noble metal-supported catalyst is preferably 0.1% of the total noble metal-supported catalyst. % Or more, more preferably 0.5% by mass or more, still more preferably 1% by mass or more, on the other hand, preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably Is 10% by mass or less. From the above viewpoint, the loading amount of the noble metal is preferably 0.1 to 20% by mass, more preferably 0.5 to 15% by mass, and further preferably 1 to 10% by mass.
- the noble metal-supported catalyst can be produced by a known method disclosed in JP-A-62-269746.
- an aqueous solution of a compound containing a catalyst first component (palladium chloride, chloroplatinic acid, etc.), an aqueous solution of a compound containing a catalyst second component (bismuth chloride, antimony pentachloride, etc.) as needed, and a catalyst as needed
- a catalyst component can be produced by a method in which each catalyst component is adsorbed on a support in each solution of an aqueous solution of a compound containing the third component (cerium chloride, lanthanum chloride, etc.), and then the catalyst component is reduced.
- the form of the catalyst produced by the above method is not particularly limited. Examples of forms other than the powders listed above include, for example, “Chemical Engineering Handbook, Revised 6th Edition” (Maruzen Co., Ltd.), page 993. Those shown in Table 19.5 are listed.
- the content of the noble metal of the first catalyst component in the suspension is preferably 0.001 to 2.0% by mass, more preferably 0.01% with respect to the content of the polyoxyalkylene alkyl ether that is the reaction raw material. It is -1.5 mass%, More preferably, it is 0.02-1.3 mass%. In addition, when a some element is included as a catalyst 1st component, content of the said noble metal is those total amounts.
- the content of the noble metal-supported catalyst in the suspension is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and still more preferably, from the viewpoint of increasing the reactivity with respect to the polyoxyalkylene alkyl ether. Is 1% by mass or more.
- the content of the noble metal-supported catalyst is preferably 20% by mass or less, more preferably 15% by mass or less, and further preferably 10% by mass or less from the viewpoint of economy.
- the content of the noble metal-supported catalyst in the suspension is preferably 0.1 to 20% by mass, more preferably 0.5 to 15% by mass, and further preferably 1 to 10% by mass from the above viewpoint. Part.
- the suspension or solution contains water.
- the content of water in the suspension or solution is preferably 0.1 to 100 times by mass with respect to the content of the polyoxyalkylene alkyl ether, from the viewpoint that high reactivity is obtained and handling is good. More preferably, it is 0.5 to 50 times by mass, and further preferably 1 to 20 times by mass.
- the suspension or solution may contain an organic solvent such as a lower alcohol such as ethanol as long as the reactivity is not lowered and foaming after blending with a cleaning agent or the like is not inhibited.
- an organic solvent such as a lower alcohol such as ethanol
- the suspension or solution preferably contains an alkaline substance.
- the oxygen oxidation of the polyoxyalkylene alkyl ether is preferably performed in the presence of an alkaline substance.
- alkali substance examples include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; alkali metal carbonates such as sodium carbonate and potassium carbonate. Of these, alkali metal hydroxides are preferable from the viewpoint that high reactivity can be obtained. Among them, sodium hydroxide and potassium hydroxide are preferable, and sodium hydroxide is more preferable.
- the suspension or solution may contain only a single type of alkaline substance, or may contain a plurality of types of alkaline substance.
- the content of the alkaline substance in the suspension or solution is preferably such an amount that the pH of the suspension or solution is 7 to 14, more preferably 9 to 14, and still more preferably 11 to 14. This is the amount.
- the suspension or solution may previously contain polyoxyalkylene alkyl ether carboxylic acid and / or a salt thereof, which is an oxidation reaction product of polyoxyalkylene alkyl ether, and does not decrease the reactivity and is washed. It may contain other organic solvents, inorganic salts, polymers, etc., as long as it does not reduce foaming when mixed with an agent, etc., and does not hinder the separation and removal of the noble metal-supported catalyst contained in the reaction solution. Good.
- the suspension or solution may contain an antifoaming agent.
- the antifoaming agent include silicone oil, higher alcohol, higher fatty acid and salts thereof, pluronic type copolymer, tetronic type copolymer, polyethylene glycol, polypropylene glycol and the like.
- the suspension or solution contains an antifoaming agent from the viewpoint of preventing the foaming of the detergent composition from being reduced. It is desirable not to.
- the dissolved oxygen concentration before the oxidation reaction of the suspension or solution is preferably less than 3.0 mg / L, more preferably 1.0 mg / L or less.
- the dissolved oxygen concentration of the suspension or solution is measured by immersing the measuring part sensor in the suspension or solution using various measuring devices based on the measurement principle of the diaphragm electrode type (polarographic type, galvanic cell type) and fluorescent type. Is done.
- a suspension or solution is a non-Newtonian pseudoplastic fluid whose viscosity varies with reaction rate and temperature, and whose apparent viscosity decreases as the applied shear rate increases.
- the apparent viscosity of the suspension or solution before the start of the reaction affects the reactivity, that is, the reaction end time. Therefore, from the viewpoint of productivity and also from the viewpoint of quality such as hue, the apparent viscosity of the suspension or solution before the start of the reaction (time before supplying oxygen) is preferably 1 to 10,000 mPa.
- the viscosity of the suspension or solution is measured as a static viscosity using a rheometer (for example, ARES-100TNI manufactured by TA instrument) with a Couette of 34 mm and a condition of 70 ° C. and a shear rate of 1 s ⁇ 1 .
- a rheometer for example, ARES-100TNI manufactured by TA instrument
- the pH of the suspension or solution is preferably 7 to 14 as described above, and more preferably from the viewpoint of quality such as reactivity and hue when producing a polyoxyalkylene alkyl ether carboxylic acid or a salt thereof. 9-14, more preferably 11-14.
- the oxygen concentration in the oxygen-containing gas is preferably 50 from the viewpoint of increasing the reaction rate and from the viewpoint of reducing the components in the oxygen-containing gas that are not consumed by the reaction and reducing the foaming of the suspension or solution. It is at least volume%, more preferably at least 80 volume%, even more preferably at least 85 volume%, even more preferably at least 90 volume%.
- examples of means for obtaining an oxygen-containing gas having a high oxygen concentration include a cryogenic air separation method using air as a raw material, a pressure fluctuation adsorption method, and a membrane separation method. Of these, the pressure fluctuation adsorption method is often used from the viewpoint of ease of production and economy.
- the upper limit of the oxygen concentration in the oxygen-containing gas is 100% by volume.
- the oxygen concentration is about 96% by volume at the maximum. Is the limit.
- the oxygen concentration is preferably 96% by volume or less, more preferably 92% by volume or less.
- the oxygen concentration is preferably 50 to 100% by volume, more preferably 80 to 96% by volume, still more preferably 85 to 96% by volume, and further preferably 90 to 96% by volume. More preferably, it is 90 to 92% by mass.
- gases other than oxygen in the oxygen-containing gas include rare gases such as nitrogen and argon that are inert to the oxidation reaction of polyoxyalkylene alkyl ether.
- the oxygen-containing gas is supplied to the suspension or solution by blowing the oxygen-containing gas into the suspension or solution, for example, in a stirred tank reactor.
- the blowing of the oxygen-containing gas into the suspension or solution may be performed continuously or intermittently, but is preferably performed continuously from the viewpoint of production efficiency.
- the depth (d) from the liquid surface at the supply position of the oxygen-containing gas to the suspension or solution at rest when the reaction raw material filling is completed is preferably 0.1 to 1, more preferably 0.5 to 1, still more preferably 0.9 to 1, more preferably 1.
- it is preferably 11 mol% / h or more so as to be higher than 10 mol% / h in terms of the oxygen supply rate with respect to the total number of moles of polyoxyalkylene alkyl ether and polyoxyalkylene alkyl ether carboxylic acid and salts thereof. Set to be.
- An aqueous solution containing polyoxyalkylene alkyl ether and polyoxyalkylene alkyl ether carboxylic acid and / or a salt thereof forms a liquid crystal having a high static viscosity depending on its composition. If the liquid phase component in the suspension or solution has such a composition during the reaction, the apparent viscosity of the suspension or solution increases. Of the oxygen-containing gas supplied to the suspension or solution, the gas that has not been consumed by the reaction tends to remain in the suspension or solution having an apparent viscosity increased. Furthermore, the gas entrained in the liquid phase by stirring is not easily released from the suspension or solution, and the suspension or solution foams.
- the initial supply rate of the initial oxygen-containing gas is reduced from the viewpoint of reducing gas remaining in the suspension or solution and avoiding foaming. It is considered preferable to make the reaction proceed quickly in the above range.
- the initial supply rate of the oxygen-containing gas is converted to the supply rate of oxygen with respect to the total number of moles of polyoxyalkylene alkyl ether, polyoxyalkylene alkyl ether carboxylic acid and salts thereof from the viewpoint of maintaining the reaction rate. And set to 15 mol% / h or less.
- the supply rate of the oxygen-containing gas to the suspension or solution is converted from the above viewpoint to the supply rate of oxygen with respect to the total number of moles of polyoxyalkylene alkyl ether, polyoxyalkylene alkyl ether carboxylic acid and salts thereof. Therefore, it is set to be higher than 11 mol% / h and lower than or equal to 15 mol% / h, preferably higher than 11 mol% / h and lower than or equal to 15 mol% / h.
- the supply rate of the oxygen-containing gas is preferably continuously included in the above range, but as long as the effect of the method for producing the polyoxyalkylene alkyl ether carboxylic acid or salt thereof according to the present embodiment is not impaired. May be temporarily out of the above range.
- the supply rate of the oxygen-containing gas to the suspension or solution is decreased when the reaction rate is 50% by mass or more and less than 70%.
- the supply rate of the oxygen-containing gas to the suspension or solution is such that the reaction rate is 50% or more, more preferably 53% or more, and even more preferably 55% or more. Decrease.
- the supply rate of the oxygen-containing gas is decreased from the viewpoint of productivity when the reaction rate is less than 70%, preferably 67% or less, more preferably 65% or less.
- the operation of reducing the supply rate of the oxygen-containing gas to the suspension or solution may be performed only once, or may be performed in multiple steps in multiple steps from the viewpoint of maintaining the reaction rate.
- Blowing of the oxygen-containing gas into the suspension or solution is performed through the outlet of a gas blowing tube installed in the suspension or solution.
- a gas blowing tube installed in the suspension or solution.
- the outlet of the gas blowing tube include a single hole nozzle, a porous nozzle, and a ring nozzle.
- the oxygen-containing gas supply rate after reducing the oxygen-containing gas supply rate to the suspension or the solution is determined from the polyoxyalkylene alkyl ether and the polyoxyalkylene alkyl ether carboxylic acid and salts thereof. It is set so that the supply rate of oxygen is 1 mol% / h or more, preferably 2 mol% / h or more, more preferably 5 mol% / h or more with respect to the total number of moles.
- the supply rate after reducing the supply rate of the oxygen-containing gas is based on the total number of moles of polyoxyalkylene alkyl ether and polyoxyalkylene alkyl ether carboxylic acid and salts thereof from the viewpoint of maintaining the reaction rate.
- the oxygen supply rate is set to 10 mol% / h or less, preferably 8 mol% / h or less.
- the supply rate of the oxygen-containing gas after the supply rate of the oxygen-containing gas to the suspension or solution is preferably reduced from the above viewpoints.
- the oxygen supply rate is 1 to 10 mol% / h, more preferably 2 to 8 mol% / h, still more preferably 5 to 8 mol% / h, based on the total number of moles of salt.
- the suspension or solution is preferably stirred with a stirring blade in a stirred tank reactor.
- the PV value as an index of the stirring efficiency is preferably set to 0.1 or more, more preferably 0.2 or more, and further preferably 0.5 or more.
- the PV value means the power required for stirring per unit volume of the suspension or solution, and the stirring power transmitted to the suspension or solution is obtained by subtracting the friction loss due to stirring from the stirring power of the stirrer. It is defined as power (kW) / volume of suspension or solution (m 3 ).
- Examples of the stirring blade used for stirring include a paddle blade, a turbine blade, and a propeller blade.
- Examples of the paddle wing include a wing configured to include a flat plate member and an anchor wing.
- the vertical cross section (S1) of the vertical plane of the region occupied by the liquid phase in the stirred tank reactor and the direction perpendicular to the rotation axis of the shaft of the stirred blade is preferably 0.10 to 0.90, and more It is preferably 0.20 to 0.70.
- stirring blade having such a configuration
- the supply rate of the oxygen-containing gas to the suspension or solution and the PV value are preferably 40% so that the rate of increase of the reaction rate per hour is preferably 50% or less. % Or less, more preferably 30% or less.
- the concentration of dissolved oxygen in the suspension or solution when the oxygen oxidation of the polyoxyalkylene alkyl ether is performed is preferably 0 mg / L or more, more preferably 0.00 from the viewpoint of increasing the reactivity with respect to the polyoxyalkylene alkyl ether. It is maintained at 1 mg / L or more, more preferably 0.2 mg / L or more, more preferably 0.3 mg / L or more.
- the dissolved oxygen concentration is preferably 1.0 mg / L or less, more preferably 0.9 mg / L or less, still more preferably 0.8 mg / L from the viewpoint of suppressing foaming of the suspension or solution. In the following, it is more preferably maintained at 0.7 mg / L or less.
- Control of the dissolved oxygen concentration in the suspension or solution is to measure the dissolved oxygen concentration of the suspension or solution over time using a measuring device, and to the suspension or solution based on the measurement result. This can be done by increasing or decreasing the supply amount of the oxygen-containing gas.
- the dissolved oxygen concentration in the suspension or solution during the oxygen oxidation of the polyoxyalkylene alkyl ether is preferably 0 to 1.0 mg / L, more preferably 0.1 to 0.00. It is maintained at 9 mg / L, more preferably 0.2 to 0.8 mg / L, still more preferably 0.3 to 0.7 mg / L.
- the dissolved oxygen concentration may deviate from the above range when oxygenation of the polyoxyalkylene alkyl ether is performed. From the viewpoint of increasing the reactivity to the polyoxyalkylene alkyl ether, and a suspension or solution From the viewpoint of suppressing foaming, it is preferable to maintain 50% or more of the reaction time in the above range, more preferably 70% or more in the above range, and 90% or more in the above range. preferable.
- the reaction temperature during the oxygen oxidation of the polyoxyalkylene alkyl ether is preferably 20 ° C. or higher, more preferably 30 ° C. or higher, still more preferably 40 ° C. or higher, while preferably 100 ° C. or lower. Yes, more preferably 90 ° C. or lower, still more preferably 80 ° C. or lower. From the above viewpoint, the reaction temperature is preferably 20 to 100 ° C., more preferably 30 to 90 ° C., and further preferably 40 to 80 ° C.
- the reaction pressure is preferably 0 (normal pressure) to 1.0 MPa as a gauge pressure, more preferably 0 (from the viewpoint of increasing the solubility of oxygen in a suspension or solution and considering the pressure resistance of the apparatus. Normal pressure) to 0.5 MPa, and more preferably 0 (normal pressure) to 0.3 MPa.
- the polyoxyalkylene alkyl ether, the noble metal-supported catalyst, and the water may be supplied to the stirred tank reactor continuously or intermittently.
- an alkaline substance it is preferable to supply as an aqueous solution, and it is preferable to supply continuously or intermittently so that the pH of a suspension or a solution may maintain a predetermined value.
- polyoxyalkylene alkyl ether, noble metal supported catalyst, water, alkali, and catalyst are used in the present invention obtained in a stirred tank reactor in which the product of the same batch before the reaction remains, or in another batch.
- the oxidation reaction may be carried out by supplying to a stirred tank reactor which is already filled with a product containing such polyoxyalkylene alkyl ether and / or polyoxyalkylene alkyl ether carboxylic acid.
- the reaction rate represented by the formula (A) at the start of the oxidation reaction is preferably 30% or more, more preferably 35% or more, still more preferably 40% or more, preferably less than 50%, more Preferably it is 45% or less.
- the total amount of polyoxyalkylene alkyl ether and polyoxyalkylene alkyl ether carboxylic acid and salt thereof is preferably 1% by mass or more, more preferably 5% by mass or more, based on the total amount of the suspension or solution. More preferably, it is 15% by mass or more, while it is preferably 70% by mass or less, more preferably 40% by mass or less, and further preferably 30% by mass or less. From the above viewpoint, this amount is preferably 1 to 70% by mass, more preferably 5 to 40% by mass, and further preferably 15 to 30% by mass with respect to the total amount of the suspension or solution. is there.
- the polyoxyalkylene alkyl ether carboxylic acid is used from the viewpoint of excellent foamability as a cleaning substrate for the polyoxyalkylene alkyl ether carboxylic acid or a salt thereof. It is preferable that the purity of the acid or its salt is high. Therefore, the reaction rate at the end of the oxidation reaction is preferably 80% or more, more preferably 95% or more, from the viewpoint of excellent foamability as a cleaning substrate for polyoxyalkylene alkyl ether carboxylic acid or a salt thereof. More preferably, it is 96% or more.
- the total amount of the polyoxyalkylene alkyl ether and the polyoxyalkylene alkyl ether carboxylic acid and its salt at the end of the oxidation reaction is preferably 1 to 100% by mass, more preferably based on the total amount of the suspension or solution. It is 5 to 40% by mass, and more preferably 15 to 30% by mass.
- the dissolved oxygen concentration in the suspension or solution As a result, the end of the oxidation reaction is detected by a steep increase in the dissolved oxygen concentration, and the supply of the oxygen-containing gas to the suspension or solution is stopped at that time, after the end of the oxidation reaction. It is preferable to suppress foaming of the suspension or solution.
- the steep rise in the dissolved oxygen concentration in the suspension or solution is from 0.3 to 1000 mg in terms of the rate of increase in the dissolved oxygen concentration in the suspension or solution from the viewpoint of suppressing foaming of the suspension or solution.
- / L / min is preferable, 1 to 500 mg / L / min is more preferable, and 5 to 200 mg / L / min is still more preferable.
- the dissolved oxygen concentration in the suspension or solution during the oxidation reaction is preferably in the range of 0 to 3.0 mg / L, more preferably in the range of 0 to 0.2 mg / L, still more preferably 0 to 1.0 mg / L. Maintain L range. However, even if the dissolved oxygen concentration is managed, when the oxidation reaction is completed, the dissolved oxygen concentration is sharply increased away from the management. In this case, from the viewpoint of avoiding foaming of the suspension or solution, preferably when the dissolved oxygen concentration in the suspension or solution exceeds 3.0 mg / L, more preferably exceeds 2.0 mg / L. When, more preferably, 1.0 mg / L is exceeded, the supply of the oxygen-containing gas into the suspension or solution is stopped.
- the carboxylic acid contained in the reaction solution after separation and removal of the noble metal supported catalyst can be used as a product.
- the product When producing a polyoxyalkylene alkyl ether carboxylate under alkaline conditions, a part or all of the polyoxyethylene alkyl ether carboxylic acid is dissolved in the form of a salt in the solution after separation and removal of the noble metal supported catalyst. . Therefore, after adjusting the pH, the product can be directly used as a surfactant solution. Alternatively, it can be converted into an acid form with a mineral acid such as hydrochloric acid, and a carboxylic acid liberated through an extraction step can be used as a product.
- a mineral acid such as hydrochloric acid
- the total concentration of the polyoxyalkylene alkyl ether carboxylic acid and its salt in the product is preferably 1 to 100% by mass, more preferably 5 to 40% by mass, and further preferably 15 to 30% by mass in terms of acid type. %.
- a method for producing an oxyalkylene alkyl ether carboxylic acid or a salt thereof In the oxidation reaction step, the reaction rate represented by the following formula (A) is 50% or more, preferably 53% or more, more preferably 55% or more, and less than 70%, preferably 67% or less, more preferably Converting the supply rate of the gas containing oxygen to 65 mol or less in terms of the supply rate of oxygen with respect to the total number of moles of polyoxyalkylene alkyl ether and polyoxyalkylene alkyl ether carboxylic acid and salt thereof is 10 mol% /
- Reaction rate (%) c2 ⁇ 100 / (c1 + c2) (A) [Wherein c1 is the molar concentration of polyoxyalkylene alkyl ether (mol / L) c2 is the total molar concentration (mol / L) of the polyoxyalkylene alkyl ether carboxylic acid and its salt. ]
- the supply rate of the gas containing oxygen after reducing the supply rate of the gas containing oxygen is polyoxyalkylene alkyl ether, polyoxyalkylene alkyl ether carboxylic acid and It is 1 mol% / h or more, preferably 2 mol% / h or more, more preferably 5 mol% / h or more in terms of the oxygen supply rate relative to the total number of moles of the salt, as described in ⁇ 1> above.
- the oxygen-containing gas supply rate after reducing the oxygen-containing gas supply rate is such that the polyoxyalkylene alkyl ether and the polyoxyalkylene alkyl ether carboxylic acid and its The polyoxyalkylene alkyl ether carboxyl described in the above ⁇ 1> or ⁇ 2>, which is 10 mol% / h or less, more preferably 8 mol% / h or less in terms of the oxygen supply rate relative to the total number of moles of the salt.
- the supply rate of the gas containing oxygen after the supply rate of the gas containing oxygen is reduced to polyoxyalkylene alkyl ether, polyoxyalkylene alkyl ether carboxylic acid and ⁇ 1> above, which is 1 to 10 mol% / h, preferably 2 to 8 mol% / h, more preferably 5 to 8 mol% / h in terms of the oxygen supply rate relative to the total number of moles of salt.
- the total amount of polyoxyalkylene alkyl ether and polyoxyalkylene alkyl ether carboxylic acid and salt thereof is preferably 1% by mass or more, more preferably 5% by mass with respect to the total amount of the suspension or solution. It is above, More preferably, it is 15 mass% or more, The manufacturing method of polyoxyalkylene alkyl ether carboxylic acid or its salt in any one of said ⁇ 1> thru
- the total amount of polyoxyalkylene alkyl ether and polyoxyalkylene alkyl ether carboxylic acid and salt thereof is preferably 70% by mass or less, more preferably 40% by mass, based on the total amount of the suspension or solution.
- the total amount of polyoxyalkylene alkyl ether and polyoxyalkylene alkyl ether carboxylic acid and salt thereof is preferably 1 to 70% by mass, more preferably 5 to 5%, based on the total amount of the suspension or solution.
- the oxygen concentration in the gas containing oxygen supplied to the suspension or solution is preferably 50% by volume or more, more preferably 80% by volume or more, and still more preferably.
- the oxygen concentration in the gas containing oxygen supplied to the suspension or solution is preferably 96% by volume or less, more preferably 92% by volume or less ⁇ 1>.
- Thru or the manufacturing method of polyoxyalkylene alkyl ether carboxylic acid or its salt in any one of ⁇ 8>.
- the oxygen concentration in the gas containing oxygen supplied to the suspension or solution is preferably 50 to 100% by volume, more preferably 80 to 96% by volume,
- the polyoxyalkylene alkyl ether according to any one of ⁇ 1> to ⁇ 7>, preferably 85 to 96% by volume, more preferably 90 to 96% by volume, and still more preferably 90 to 92% by volume.
- a method for producing a carboxylic acid or a salt thereof is preferably 50 to 100% by volume, more preferably 80 to 96% by volume.
- the reaction rate at the end of the reaction is preferably 80% or more, more preferably 95% or more, and still more preferably 96% or more, ⁇ 1> to ⁇ 10 >
- ⁇ 12> The polyoxyalkylene according to any one of ⁇ 1> to ⁇ 11>, wherein the suspension or solution containing the polyoxyalkylene alkyl ether contains a powdery noble metal-supported catalyst in which a noble metal is supported on a carrier.
- the content of the noble metal-supported catalyst in the suspension or solution is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and further preferably 1% by mass or more.
- the content of the noble metal-supported catalyst in the suspension or solution is preferably 20% by mass or less, more preferably 15% by mass or less, and further preferably 10% by mass or less, ⁇ 12> Or the manufacturing method of the polyoxyalkylene alkyl ether carboxylic acid or its salt as described in ⁇ 13>.
- the content of the noble metal supported catalyst in the suspension or solution is preferably 0.1 to 20% by mass, more preferably 0.5 to 15% by mass, and further preferably 1 to 10% by mass.
- ⁇ 16> The method for producing a polyoxyalkylene alkyl ether carboxylic acid or a salt thereof according to any one of the above ⁇ 12> to ⁇ 15>, wherein the ⁇ 16> noble metal is one or more elements selected from platinum group elements.
- the reaction temperature during the supply of oxygen-containing gas in the suspension or solution is preferably 20 ° C. or higher, more preferably 30 ° C. or higher, and further The method for producing a polyoxyalkylene alkyl ether carboxylic acid or a salt thereof according to any one of ⁇ 1> to ⁇ 16>, preferably 40 ° C. or higher.
- the reaction temperature during supply of oxygen-containing gas in the suspension or solution is preferably 100 ° C. or lower, more preferably 90 ° C. or lower, and further The method for producing a polyoxyalkylene alkyl ether carboxylic acid or a salt thereof according to any one of ⁇ 1> to ⁇ 17>, preferably 80 ° C. or lower.
- the reaction temperature during the supply of the oxygen-containing gas into the suspension or solution is preferably 20 to 100 ° C., more preferably 30 to 90 ° C.
- ⁇ RO- (AO) n-1 -A'-COO ⁇ m M ⁇ RO- (AO) n-1 -A'-COO ⁇ m M
- R is a hydrocarbon group having 4 to 30 carbon atoms
- AO is an alkyleneoxy group having 2 to 4 carbon atoms
- n is an average added mole number of AO of 1 to 100
- a ′ is 1 to 3 alkylene groups
- M is a cation or hydrogen ion
- m is the valence of M.
- the suspension or solution in the oxidation reaction step, has a depth of 10,000 mm or less, more preferably 5000 mm or less, and still more preferably 1000 mm or less.
- the depth of the suspension or solution is 200 to 10000 mm, more preferably 210 to 5000 mm, and further preferably 220 to 1000 mm, ⁇ 1> to ⁇ 20 >
- the suspension or solution having a depth (d) from the liquid surface at the supply position of the gas containing oxygen to the suspension or solution at rest when the reaction raw material filling is completed The ratio (d / D) to the depth (D) is preferably 0.1 to 1, more preferably 0.5 to 1, still more preferably 0.9 to 1, and still more preferably 1.
- the dissolved oxygen concentration in the suspension or solution is preferably in the range of 0 to 3.0 mg / L until the dissolved oxygen concentration in the suspension or solution rises sharply.
- the polyoxyalkylene alkyl ether carboxylic acid according to any one of the above ⁇ 1> to ⁇ 25> which is maintained in the range of 0 to 0.2 mg / L, more preferably in the range of 0 to 1.0 mg / L or A method for producing the salt.
- ⁇ 27> In the oxidation reaction step, when the dissolved oxygen concentration in the suspension or solution rises sharply and preferably exceeds 3.0 mg / L, more preferably exceeds 2.0 mg / L, More preferably, the polyoxyalkylene alkyl ether carboxylic acid according to the above ⁇ 1> to ⁇ 26>, wherein the supply of the gas containing oxygen in the suspension or solution is stopped when 1.0 mg / L is exceeded. Or the manufacturing method of the salt.
- the rate of increase in the dissolved oxygen concentration in the suspension or solution is preferably 0.3 to 1000 mg / L / min, more preferably 1 to 500 mg / L / min, still more preferably 5 to 200 mg / L / min, of the polyoxyalkylene alkyl ether carboxylic acid or salt thereof described in ⁇ 1> to ⁇ 27> above Production method.
- polyoxyalkylene alkyl ether, noble metal-supported catalyst, water, alkali, and catalyst are supplied in a stirred tank reactor in which the product of the same batch before the reaction remains, or other ⁇ 1> to ⁇ 30, which are carried out in a stirred tank reactor that is already filled with a product containing the polyoxyalkylene alkyl ether and / or polyoxyalkylene alkyl ether carboxylic acid according to the present invention obtained in a batch of The manufacturing method of polyoxyalkylene alkyl ether carboxylic acid or its acid as described in>.
- the reaction rate represented by the formula (A) at the start of the oxidation reaction is preferably 30% or more, more preferably 35% or more, still more preferably 40% or more, preferably Is less than 50%, more preferably 45% or less,
- Reaction rate A sample was extracted from the suspension in the reaction system, and the catalyst was filtered off.
- the carboxyl group in the obtained filtrate is titrated by the EPTON method using a titration device (METTLERTOLEDO Metrohm 794 BasicTitrino) and a permeability measuring device (METTLERTOLEDO Metrohm 622 Photometer), and the polyoxyalkyl ether in the sample
- the molar concentration of sodium carboxylate hereinafter referred to as “sodium POE alkyl ether carboxylate” was determined.
- POE alkyl ether The molar concentration of polyoxyethylene alkyl ether (hereinafter referred to as “POE alkyl ether”) is determined based on the molar concentration of POE alkyl ether determined from the amount of POE alkyl ether charged at the start of the reaction and the sodium POE alkyl ether carboxylate. It calculated
- the mass concentration was calculated by multiplying the molar concentration by the molecular weight.
- Dissolved oxygen concentration A diaphragm electrode type dissolved oxygen meter (Horiba Seisakusho OM-51, electrode 9520-10D, measurement range: 0 to 19.99 mg / L) was calibrated in the atmosphere, and the electrode tip was placed on the sample. It was immersed and the dissolved oxygen concentration was measured.
- a diaphragm electrode type dissolved oxygen meter Horiba Seisakusho OM-51, electrode 9520-10D, measurement range: 0 to 19.99 mg / L
- Example 1 17.6 kg of POE alkyl ether in which 4 mol of ethylene oxide was added to lauryl alcohol on average in a 300 L capacity reaction vessel, and a POE alkyl ether sodium carboxylate aqueous solution obtained as a reaction product by oxidizing the POE alkyl ether with oxygen ( Concentration of sodium POE alkyl ether carboxylate: 25.0 mass%) 48.8 kg, 48 mass% sodium hydroxide aqueous solution 4.30 kg, Pd (content 4 mass%), Pt (content 1 mass%) on the activated carbon of the carrier ), And Bi (content 5 mass%)-supported powdery noble metal-supported catalyst (Evonik Degussa, water content 57.2 mass%) 3.50 kg and deionized water 77.1 kg were charged to atmospheric pressure.
- Concentration of sodium POE alkyl ether carboxylate: 25.0 mass%) 48.8 kg, 48 mass% sodium hydroxide aqueous solution 4.30 kg, Pd (content 4 mass%), Pt (content 1 mass%) on the
- the stirring speed was reduced to 134 with a stirring blade (Max Blend blade manufactured by Sumitomo Heavy Industries, Ltd.).
- Suspension was prepared by heating the temperature to 70 ° C. with stirring as pm.
- the total amount of this suspension is 150 kg, and the composition is 17.6 kg (11.7 mass%) of POE alkyl ether, 12.1 kg (8.1 mass%) of sodium POE alkyl ether carboxylate, sodium hydroxide Is 2.1 kg (1.4% by mass), the precious metal-supported catalyst is 1.5 kg (1.0% by mass), and water is 116.7 kg (77.8% by mass).
- the depth of the suspension was 270 mm.
- the oxygen-containing gas (oxygen concentration: 90% by volume, nitrogen concentration: 10% by volume) is introduced into the suspension while continuing stirring and temperature control.
- Supply of 5400 mL / min oxygen supply rate of 15 mol% / h with respect to the total number of moles of POE alkyl ether and sodium POE alkyl ether carboxylate
- the time when the supply of the oxygen-containing gas was started was defined as the reaction start time.
- the reaction rate at the start of the reaction was 42%.
- the oxidation reaction was continued by reducing the oxygen supply rate to 7.5 mol% / h) with respect to the total number of moles of sodium ether carboxylate.
- reaction rates at 2.0 hours and 3.0 hours after the start of the reaction were 70% and 83%, respectively.
- the supply rate of the oxygen-containing gas (oxygen concentration: 90% by volume, nitrogen concentration: 10% by volume) was adjusted to 1800 mL / min (the total number of moles of POE alkyl ether and sodium POE alkyl ether carboxylate).
- the oxygen supply rate was further reduced to 5.0 mol% / h), and the oxidation reaction was continued.
- reaction rates after 4.0 hours and 5.0 hours after the start of the reaction were 88% and 95%, respectively.
- the suspension was vigorously foamed in the reaction tank and the contents were ejected from the reaction tank, so the supply of oxygen-containing gas was stopped and the reaction was stopped.
- the reaction rate was 70%.
- Example 2> In a reaction tank having a capacity of 5000 L, 285.1 kg of POE alkyl ether and an aqueous solution of sodium POE alkyl ether carboxylate obtained by oxidizing the POE alkyl ether as a reaction product (concentration of sodium POE alkyl ether carboxylate: 20.0) Mass 0.5) 950.5 kg, 32 mass% aqueous sodium hydroxide solution 104.0 kg, Pd (content 4 mass%), Pt (content 1 mass%), and Bi (content 5 mass%) on the activated carbon of the carrier A powdered noble metal-supported catalyst (Evonik Degussa Co., Ltd., water content 55.9% by mass) 53.90 kg and deionized water 1011 kg were charged and stirred under an atmospheric pressure (manufactured by Satake Chemical Machinery Co., Ltd.).
- the depth of the suspension was 930 mm.
- the oxygen-containing gas oxygen concentration: 90% by volume, nitrogen concentration: 10% by volume
- the oxygen-containing gas oxygen concentration: 90% by volume, nitrogen concentration: 10% by volume
- the supply speed (flow rate) was.
- the time when the supply of the oxygen-containing gas was started was defined as the reaction start time.
- the reaction rate at the start of the reaction was 42%.
- the reaction rate 1.0 hour after the start of the reaction was 57%.
- the supply rate of the oxygen-containing gas (oxygen concentration: 90% by volume, nitrogen concentration: 10% by volume) was set at 43.2 L / min (POE alkyl ether and The oxidation reaction was continued by reducing the oxygen supply rate to 7.5 mol% / h) relative to the total number of moles of sodium POE alkyl ether carboxylate.
- the reaction rate was 65%.
- the reaction rate 2.0 hours after the start of the reaction was 70%.
- the supply rate of the oxygen-containing gas (oxygen concentration: 90% by volume, nitrogen concentration: 10% by volume) was adjusted to 28.8 L / min (total moles of POE alkyl ether and sodium POE alkyl ether carboxylate). The oxygen supply rate was further reduced to 5.0 mol% / h), and the oxidation reaction was continued.
- reaction rates after 3.0 hours, 4.0 hours, and 5.0 hours after the start of the reaction were 78%, 84%, and 89%, respectively.
- reaction rates at 6.0 hours, 7.0 hours, and 8.0 hours after the start of the reaction were 93%, 96%, and 98%, respectively.
- reaction rate was 70%.
- the supply rate of the oxygen-containing gas (oxygen concentration: 90% by volume, nitrogen concentration: 10% by volume) was adjusted to 43.2 L / min (total moles of POE alkyl ether and sodium POE alkyl ether carboxylate).
- the oxygen supply rate was 7.5 mol% / h), and the oxidation reaction was continued.
- the suspension was vigorously foamed in the reaction tank and the contents were ejected from the reaction tank, so the supply of oxygen-containing gas was stopped and the reaction was stopped.
- the reaction rate was 83%. Although a sample for analysis could be collected, the contents were ejected, and the reaction product could not be recovered sufficiently.
- Example 3 A POE alkyl ether obtained by adding 4 moles of ethylene oxide to lauryl alcohol on average in a 30 L capacity reaction vessel was diluted with water to a concentration of 94% by mass, 2567 g of an aqueous solution of POE alkyl ether, and the POE alkyl ether was oxygenated.
- POE alkyl ether sodium carbonate aqueous solution (concentration of POE alkyl ether carboxylate sodium: 21.5 mass%) 8219 g obtained by oxidation as a reaction product, 48 mass% sodium hydroxide aqueous solution 580.0 g, Pd on the activated carbon of the carrier 432 g of a powdered noble metal-supported catalyst (Evonik Degussa, water content 57.2 mass%) supporting (content 4 mass%), Pt (content 1 mass%), and Bi (content 5 mass%) As well as 8351 g of deionized water, Suspension was prepared by heating the temperature to 70 ° C. with stirring and stirring rotational speed as 50rpm by chemical mechanical Industry Co. Super Mix MR205).
- the total amount of this suspension was 20149 g.
- the composition of the suspension is 2413 g (12.0 mass%) of POE alkyl ether, 1767 g (8.8 mass%) of sodium POE alkyl ether carboxylate, 278.0 g (1.4 mass%) of sodium hydroxide.
- the amount of the noble metal-supported catalyst was 185 g (0.9% by mass) and water 15506 g (77.0% by mass).
- the depth of the suspension was 226 mm.
- the oxygen-containing gas (oxygen concentration: 90% by volume, nitrogen concentration: 10% by volume) is introduced into the suspension while continuing stirring and temperature control.
- Supply of 722 mL / min oxygen supply rate of 15 mol% / h with respect to the total number of moles of POE alkyl ether and sodium POE alkyl ether carboxylate
- the time when the supply of the oxygen-containing gas was started was defined as the reaction start time.
- the reaction rate at the start of the reaction was 36.5%.
- the supply rate of the oxygen-containing gas (oxygen concentration: 90% by volume, nitrogen concentration: 10% by volume) was set to 481 mL / min (POE alkyl ether and POE alkyl).
- the oxygenation rate was reduced to 10 mol% / h) with respect to the total number of moles of sodium ether carboxylate, and the oxidation reaction was continued.
- the reaction rate was 58%.
- reaction product was slightly foamed at the end of the reaction, it did not affect the recovery of the reaction product.
- Example 4 The reaction was started under the same conditions as in Example 3.
- the supply rate of the oxygen-containing gas (oxygen concentration: 90% by volume, nitrogen concentration: 10% by volume) was adjusted to 241 mL / min (POE alkyl ether and POE alkyl).
- the oxygenation rate was lowered to 5 mol% / h) with respect to the total number of moles of sodium ether carboxylate, and the oxidation reaction was continued.
- the reaction rate was 56%.
- Example 5 Same as Example 3 except that the supply amount of the oxygen-containing gas at the start of the reaction is 548 mL / min (the supply rate of oxygen is 11 mol% / h relative to the total number of moles of POE alkyl ether and sodium POE alkyl ether carboxylate). The reaction was started under conditions.
- reaction liquid increased and it became impossible to stir, and the suspension foamed vigorously in the reaction tank, and the contents were ejected from the reaction tank.
- the supply was stopped and the reaction was stopped.
- the reaction rate was 55%.
- the present invention is useful for a method for producing a polyoxyalkylene alkyl ether carboxylic acid and a salt thereof.
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Abstract
Description
[式中、c1は、ポリオキシアルキレンアルキルエーテルのモル濃度(mol/L)
c2は、ポリオキシアルキレンアルキルエーテルカルボン酸及びその塩の合計モル濃度(mol/L))である。]
[式中、c1は、ポリオキシアルキレンアルキルエーテルのモル濃度(mol/L)
c2は、ポリオキシアルキレンアルキルエーテルカルボン酸及びその塩の合計モル濃度(mol/L))である。]
本実施形態に係るポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法では、ポリオキシアルキレンアルキルエーテルを含む懸濁液又は溶液中に酸素含有気体を供給することにより、ポリオキシアルキレンアルキルエーテルを酸素酸化させてポリオキシアルキレンアルキルエーテルカルボン酸又はその塩を生成させる。
<反応原料及び反応生成物>
懸濁液又は溶液は、反応原料としてポリオキシアルキレンアルキルエーテルを含有する。
[式中、Rは炭素数4~30の炭化水素基、AOは炭素数2~4のアルキレンオキシ基、及びnはAOの平均付加モル数で1~100の数である。]
式中の構造は、目的とするカルボン酸又はその塩の性能、用途等に応じて適宜選定することができる。
[式中、R、AO、nは、一般式(I)と同じ意味を表し、A’は炭素数1~3のアルキレン基、Mは陽イオン若しくは水素イオン、及びmはMの価数である。]
一般式(II)におけるR、AO、及びnの好ましい態様は一般式(I)と同じである。
懸濁液又は溶液は、触媒である貴金属を担体に担持させた粉状の貴金属担持触媒を含有した懸濁液であってもよい。
懸濁液又は溶液は水を含有する。
懸濁液又は溶液は、アルカリ性条件下でポリオキシアルキレンアルキルエーテルカルボン酸塩を製造する場合、アルカリ物質を含有することが好ましい。ポリオキシアルキレンアルキルエーテルの酸素酸化はアルカリ物質存在下で行うことが好ましい。
懸濁液又は溶液は、ポリオキシアルキレンアルキルエーテルの酸化反応生成物であるポリオキシアルキレンアルキルエーテルカルボン酸及び/又はその塩を予め含有していてもよく、また、反応性を低下させず、洗浄剤等に配合された際に起泡性を低下させず、及び反応液に含まれる貴金属担持触媒の分離除去を阻害しない範囲で、その他に有機溶剤、無機塩、ポリマー等を含有していてもよい。
懸濁液又は溶液の酸化反応前、つまり、酸素含有気体の供給開始時点における溶存酸素濃度は、好ましくは3.0mg/L未満であり、より好ましくは1.0mg/L以下である。懸濁液又は溶液の溶存酸素濃度は、隔膜電極式(ポーラログラフ式、ガルバニ電池式)、蛍光式を測定原理とした各種測定装置を用い、測定部センサーを懸濁液又は溶液に浸漬して測定される。
<酸素含有気体>
酸素含有気体中の酸素濃度は、反応速度を高める観点、及び酸素含有気体中の成分であって反応で消費されない成分を低減して懸濁液又は溶液の発泡を低減する観点から、好ましくは50体積%以上であり、より好ましくは80体積%以上であり、更に好ましくは85体積%以上であり、より更に好ましくは90体積%以上である。ここで、高酸素濃度の酸素含有気体を得る手段としては、例えば、空気を原料とした深冷空気分離法、圧力変動吸着法、膜分離法等が挙げられる。これらのうち、製造の容易さや経済性の観点から圧力変動吸着法がよく用いられる。酸素含有気体中の酸素濃度の上限は100体積%であるが、圧力変動吸着法の場合、その原理から大気中のアルゴンを除去することが困難であり、そのため、酸素濃度は最高96体積%程度が限界となる。
懸濁液又は溶液への酸素含有気体の供給は、例えば攪拌槽型反応器内において、懸濁液又は溶液への酸素含有気体の吹き込みにより行う。この懸濁液又は溶液への酸素含有気体の吹き込みは連続的に行ってもよく、また、断続的に行ってもよいが、生産効率の観点から連続的に行うことが好ましい。
本実施形態に係るポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法では、ポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の洗浄基材としての優れた起泡性の観点からポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の純度が高いことが好ましい。従って、酸化反応終了時における反応率は、ポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の洗浄基材としての優れた起泡性の観点から、好ましくは80%以上であり、より好ましくは95%以上であり、更に好ましくは96%以上である。
本実施形態に係るポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法で、粉状の貴金属担持触媒を含有させた懸濁液で反応を行った場合は、反応終了後の懸濁液を濾過等して貴金属担持触媒を分離除去する。
前記酸化反応工程において、下記式(A)で表される反応率が50%以上、好ましくは53%以上、より好ましくは55%以上で、且つ70%未満、好ましくは67%以下、より好ましくは65%以下の間に、酸素を含有する気体の供給速度を、ポリオキシアルキレンアルキルエーテル並びにポリオキシアルキレンアルキルエーテルカルボン酸及びその塩の合計モル数に対する酸素の供給速度に換算して、10mol%/hより高く且つ15mol%/h以下から、1mol%/h以上且つ10mol%/h以下に低下させる、ポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法。
[式中、c1は、ポリオキシアルキレンアルキルエーテルのモル濃度(mol/L)
c2は、ポリオキシアルキレンアルキルエーテルカルボン酸及びその塩の合計モル濃度(mol/L))である。]
[式中、Rは炭素数4~30の炭化水素基、AOは炭素数2~4のアルキレンオキシ基、nはAOの平均付加モル数で1~100の数、A’は炭素数1~3のアルキレン基、Mは陽イオン若しくは水素イオン、及びmはMの価数である。]
下記の実施例1~5及び比較例1~3のポリオキシアルキレンアルキルエーテルカルボン酸塩の製造を行った。それぞれの内容については表1~3にも示す。なお、反応率及び溶存酸素濃度は以下の方法で測定した。
容量300Lの反応槽に、ラウリルアルコールにエチレンオキサイドを平均で4モル付加したPOEアルキルエーテルを17.6kg、そのPOEアルキルエーテルを酸素酸化して反応生成物として得られるPOEアルキルエーテルカルボン酸ナトリウム水溶液(POEアルキルエーテルカルボン酸ナトリウムの濃度:25.0質量%)48.8kg、48質量%水酸化ナトリウム水溶液4.30kg、担体の活性炭にPd(含有量4質量%)、Pt(含有量1質量%)、及びBi(含有量5質量%)を担持した粉状の貴金属担持触媒(エボニックデグサ社製、含水率57.2質量%)3.50kg、並びに脱イオン水77.1kgを仕込み、大気圧下、それを攪拌翼(住友重機械工業社製 マックスブレンド翼)により攪拌回転数を134rpmとして攪拌すると共にその温度を70℃まで昇温して懸濁液を調製した。この懸濁液の総量は150kgであり、組成は、POEアルキルエーテルが17.6kg(11.7質量%)、POEアルキルエーテルカルボン酸ナトリウムが12.1kg(8.1質量%)、水酸化ナトリウムが2.1kg(1.4質量%)、貴金属担持触媒が1.5kg(1.0質量%)、及び水116.7kg(77.8質量%)である。
実施例1と同じ条件で酸化反応を開始した。なお、反応開始時の反応率は36%であった。
容量5000Lの反応槽に、POEアルキルエーテルを285.1kg、そのPOEアルキルエーテルを酸素酸化して反応生成物として得られるPOEアルキルエーテルカルボン酸ナトリウム水溶液(POEアルキルエーテルカルボン酸ナトリウムの濃度:20.0質量%)950.5kg、32質量%水酸化ナトリウム水溶液104.0kg、担体の活性炭にPd(含有量4質量%)、Pt(含有量1質量%)、及びBi(含有量5質量%)を担持した粉状の貴金属担持触媒(エボニックデグサ社製、含水率55.9質量%)53.90kg、並びに脱イオン水1011kgを充填し、大気圧下、それを攪拌翼(佐竹化学機械工業社製 スーパーミックス翼MR205)により攪拌回転数を70rpmとして攪拌すると共にその温度を70℃まで昇温して懸濁液を調製した。この懸濁液の総量は2400kgであり、組成は、POEアルキルエーテルが285.1kg(11.9質量%)、POEアルキルエーテルカルボン酸ナトリウムが190.1kg(7.92質量%)、水酸化ナトリウムが33.28kg(1.39質量%)、貴金属担持触媒が23.77kg(0.990質量%)、及び水1868kg(77.8質量%)である。
実施例2と同じ条件で反応を開始した。なお、反応開始時の反応率は40%であった。
容量30Lの反応槽に、ラウリルアルコールにエチレンオキサイドを平均で4モル付加したPOEアルキルエーテルを、その濃度が94質量%になるように水で希釈したPOEアルキルエーテル水溶液2567g、そのPOEアルキルエーテルを酸素酸化して反応生成物として得られるPOEアルキルエーテルカルボン酸ナトリウム水溶液(POEアルキルエーテルカルボン酸ナトリウムの濃度:21.5質量%)8219g、48質量%水酸化ナトリウム水溶液580.0g、担体の活性炭にPd(含有量4質量%)、Pt(含有量1質量%)、及びBi(含有量5質量%)を担持した粉状の貴金属担持触媒(エボニックデグサ社製、含水率57.2質量%)432g、並びに脱イオン水8351gを充填し、大気圧下、それを撹拌翼(佐竹化学機械工業社製 スーパーミックスMR205)により撹拌回転数を50rpmとして撹拌すると共にその温度を70℃まで昇温して懸濁液を調製した。この懸濁液の総量は20149gであった。懸濁液の組成は、POEアルキルエーテルが2413g(12.0質量%)、POEアルキルエーテルカルボン酸ナトリウムが1767g(8.8質量%)、水酸化ナトリウムが278.0g(1.4質量%)、貴金属担持触媒が185g(0.9質量%)、及び水15506g(77.0質量%)であった。
実施例3と同じ条件で反応を開始した。
反応開始時の酸素含有気体の供給量が548mL/min(POEアルキルエーテル及びPOEアルキルエーテルカルボン酸ナトリウムの合計モル数に対するに対する酸素の供給速度11mol%/h)である以外は、実施例3と同じ条件で反応を開始した。
反応開始時の酸素含有気体の供給量が241mL/min(POEアルキルエーテル及びPOEアルキルエーテルカルボン酸ナトリウムの合計モル数に対する酸素の供給速度5mol%/h)である以外は、実施例3と同じ条件で反応を開始した。
Claims (15)
- 深さが200mm以上であるポリオキシアルキレンアルキルエーテルを含む懸濁液又は溶液中に酸素を含有する気体を供給することにより、ポリオキシアルキレンアルキルエーテルを酸素酸化させる酸化反応工程を有するポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法であって、
前記酸化反応工程において、下記式(A)で表される反応率が50%以上で且つ70%未満の間に、酸素を含有する気体の供給速度を、ポリオキシアルキレンアルキルエーテル並びにポリオキシアルキレンアルキルエーテルカルボン酸及びその塩の合計モル数に対する酸素の供給速度に換算して、10mol%/hより高く且つ15mol%/h以下から、1mol%/h以上且つ10mol%/h以下に低下させる、ポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法。
反応率(%)=c2×100/(c1+c2) (A)
[式中、c1は、ポリオキシアルキレンアルキルエーテルのモル濃度(mol/L)
c2は、ポリオキシアルキレンアルキルエーテルカルボン酸及びその塩の合計モル濃度(mol/L))である。] - ポリオキシアルキレンアルキルエーテル並びにポリオキシアルキレンアルキルエーテルカルボン酸及びその塩を合わせた量が、懸濁液又は溶液の総量に対して1~70質量%である、請求項1に記載のポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法。
- 前記酸化反応工程において、懸濁液又は溶液中に供給する酸素を含有する気体における酸素濃度が50~100体積%である、請求項1又は2に記載のポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法。
- 前記酸化反応工程において、反応終了時における反応率が80%以上である、請求項1乃至3のいずれかに記載のポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法。
- ポリオキシアルキレンアルキルエーテルを含む懸濁液又は溶液が貴金属を担体に担持させた粉状の貴金属担持触媒を含有する、請求項1乃至4のいずれかに記載のポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法。
- 懸濁液又は溶液における貴金属担持触媒の含有量が0.1~20質量%である、請求項1乃至5のいずれかに記載のポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法。
- 貴金属が白金族元素から選ばれる1種以上の元素である、請求項5又は6に記載のポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法。
- 前記酸化反応工程において、懸濁液又は溶液中に酸素を含有する気体を供給している間における反応温度が20~100℃である、請求項1乃至7のいずれかに記載のポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法。
- ポリオキシアルキレンアルキルエーテルカルボン酸塩が下記式で表される、請求項1乃至8のいずれかに記載のポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法。
{RO-(AO)n-1-A’-COO}mM
[式中、Rは炭素数4~30の炭化水素基、AOは炭素数2~4のアルキレンオキシ基、nはAOの平均付加モル数で1~100の数、A’は炭素数1~3のアルキレン基、Mは陽イオン若しくは水素イオン、及びmはMの価数である。] - 前記酸化反応工程において、反応原料充填終了時における静止時の懸濁液又は溶液への酸素を含有する気体の供給位置の液面からの深さ(d)の、懸濁液又は溶液の深さ(D)に対する比率(d/D)は0.1~1である、請求項1乃至9のいずれかに記載のポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法。
- 前記酸化反応工程において、懸濁液又は溶液中の溶存酸素濃度が急峻に上昇したとき、懸濁液又は溶液中への酸素を含有する気体の供給を停止する請求項1乃至10のいずれかに記載のポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法。
- 前記酸化反応工程において、懸濁液又は溶液中の溶存酸素濃度が急峻に上昇するまでは、懸濁液又は溶液中の溶存酸素濃度を0~3.0mg/Lの範囲に維持する請求項1乃至11に記載のポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法。
- 前記酸化反応工程において、懸濁液又は溶液中の溶存酸素濃度が急峻に上昇して3.0mg/Lを超えたとき、懸濁液又は液体中での酸素を含有する気体の供給を停止する請求項1乃至12のいずれかに記載されたポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法。
- 前記酸化反応工程において、懸濁液又は溶液中の溶存酸素濃度が急峻に上昇したときの懸濁液又は溶液中の溶損酸素濃度の上昇速度が0.3~1000mg/L/minである請求項1乃至13のいずれかに記載されたポリオキシアルキレンアルキルエーテルカルボン酸又はその塩の製造方法。
- 前記酸化反応工程において、懸濁液又は溶液への酸素を含有する気体の供給速度を低下させる操作を複数回に分けて多段階に行う請求項1乃至14に記載のポリオキシアルキレンアルキルエーテルカルボン又はその酸の製造方法。
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ES2621254T3 (es) | 2017-07-03 |
JP5985965B2 (ja) | 2016-09-06 |
CN104024205A (zh) | 2014-09-03 |
EP2799423A1 (en) | 2014-11-05 |
EP2799423A4 (en) | 2015-08-12 |
US20150025271A1 (en) | 2015-01-22 |
CN104024205B (zh) | 2016-03-30 |
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