Classifications

• • 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
  • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
  • B01J37/02—Impregnation, coating or precipitation
  • B01J37/0201—Impregnation
• • 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
  • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
  • B01J23/74—Iron group metals
  • B01J23/75—Cobalt
• • 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
  • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
  • B01J23/74—Iron group metals
  • B01J23/755—Nickel
• • 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
  • B01J25/00—Catalysts of the Raney type
• • 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
  • B01J25/00—Catalysts of the Raney type
  • B01J25/02—Raney nickel
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
  • C07C29/132—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group
• • 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
  • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
  • B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
  • B01J21/08—Silica
• • 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
  • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper

Definitions

• the present invention relates to a catalyst for producing a diol terminated with a hydroxyl group at both ends thereof (hereinafter, referred to as “both end-hydroxyl group-terminated diol”), a process for producing such a catalyst, a process for producing both end-hydroxyl group-terminated diols by using the catalyst, and both end-hydroxyl group-terminated diols which have been obtained by such a production process.
• the present invention relates to a catalyst for producing both end-hydroxyl group-terminated diols, which is useful when both end-hydroxyl group-terminated diols are produced by the hydrogenolysis of an epoxy alcohol compound; a process for producing the catalyst; a process for producing both end-hydroxyl group-terminated diols by using the catalyst, and both end-hydroxyl group-terminated diols which have been obtained by the production process.
• Both end-hydroxyl group-terminated diols are industrially useful as starting materials for resins such as polyester resins and polyurethane resins.
• 1,3-propanediol is a compound having a great potential demand as a starting material for synthetic resins, particularly as a starting material for polyester fiber. Therefore, studies are being made to develop a process for producing this compound, at low cost, by a chemical production procedure, a biological production procedure, etc.
• 1,3-propanediol is produced by finally hydrogenating 3-HPA, and therefore, these processes have a problem that unreacted 3-HPA is liable to remain in the resultant 1,3-propanediol product.
• polyester is synthesized by using 1,3-propanediol containing a carbonyl compound such as 3-HPA, it has been pointed out that such 1,3-propanediol is liable to cause odor or coloring in the polyester.
• the 1,3-propanediol product should preferably contain no carbonyl compound such as 3-HPA, as completely as possible.
• JP-A Hei. 6-40973 discloses a method of subjecting 3-HPA to a hydrogenation reaction through two stages
• JP-A Hei. 11-509828 discloses a method of removing carbonyl compounds which have been contained in 3-HPA by utilizing the reaction of the carbonyl compounds with an alkali.
• Such a removing operation increases the load on the production process for 1,3-propanediol, and this becomes a cause for increasing the production cost of 1,3-propanediol.
• U.S. Pat. No. 3,975,449 discloses a process wherein a both end-hydroxyl group-terminated diol is produced by subjecting a hydroxyl group-terminated epoxy alcohol having a di-substituted oxirane ring represented by the following formula (4) to hydrogenolysis in a solvent of water, alcohol or amide.
• R 3 represents an alkylene group having 1 to 5 carbon atoms
• R 4 represents an alkyl group having 1 to 5 carbon atoms or a hydroxyalkyl group having 1 to 5 carbon atoms
• German Patent No. 1,139,477 discloses a process wherein a hydroxyl group-terminated alcohol is produced with a relatively good selectivity by the hydrogenolysis of 1,2-epoxyalkane which is a hydroxyl group-terminated epoxide having a mono-substituted oxirane ring.
• This patent publication has achieved an improvement in the selectivity for hydroxyl group-terminated alcohols in the hydrogenolysis of hydroxyl group-terminated 1,2-epoxyalkane having a mono-substituted oxirane ring, while such an improvement had been difficult until that time.
• An object of the present invention is to provide a novel catalyst for producing both end-hydroxyl group-terminated diols, which is useful in efficiently producing both end-hydroxyl group-terminated diols by the hydrogenolysis reaction of an epoxy alcohol compound.
• Another object of the present invention is to provide a process for producing the above-mentioned catalyst, a process for producing both end-hydroxyl group-terminated diols by using the catalyst, and both end-hydroxyl group-terminated diols which have been obtained by the above production process.
• the present inventors have found that, when a both end-hydroxyl group-terminated diol is intended to be produced by the hydrogenolysis reaction of an epoxy alcohol compound having a mono-substituted oxirane ring with the substituent having 6 or less carbon atoms, the both end-hydroxyl group-terminated diol can be produced with a high selectivity by conducting the hydrogenolysis reaction by use of a catalyst in the presence of a specific solvent.
• the present invention has been accomplished based on such a discovery.
• the present invention relates to a catalyst for producing both end-hydroxyl group-terminated diols, which is usable in a process for producing a both end-hydroxyl group-terminated diol represented by general formula (2) by subjecting an epoxy alcohol compound represented by general formula (1) to a hydrogenolysis reaction in the presence of at least one solvent selected from the group consisting of ethers, esters, aromatic hydrocarbon compounds, alicyclic hydrocarbon compounds and aliphatic hydrocarbon compounds, the catalyst comprising at least one element selected from the group consisting of Group V, Group VI, Group VII, Group VIII, Group IX, Group X and Group XI of the periodic table.
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6);
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6).
• the present invention relates to a process for producing the catalyst for producing both end-hydroxyl group-terminated diols according to the first aspect of the present invention.
• the present invention relates to a process for producing both end-hydroxyl group-terminated diols by using the catalyst for producing both end-hydroxyl group-terminated diols according to the first aspect of the present invention.
• the present invention relates to both end-hydroxyl group-terminated diols which have been produced by the process for producing both end-hydroxyl group-terminated diols of the third aspect of the present invention.
• the present invention may include the following embodiments.
• a catalyst which contains at least one element selected from the group consisting of Group V elements, Group VI elements, Group VII elements, Group VIII elements, Group IX elements, Group X elements, and Group XI elements in the periodic table, and is to be used for subjecting an epoxy alcohol represented by the following general formula (1) to a hydrogenolysis reaction in the presence of at least one solvent selected from the group consisting of ethers, esters, aromatic hydrocarbon compounds, alicyclic hydrocarbon compounds and aliphatic hydrocarbon compounds, to thereby obtain a both end-hydroxyl group-terminated diol represented by the following general formula (2).
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6);
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 10 carton atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6).
• a process for producing a both end-hydroxyl group-terminated diol wherein an epoxy alcohol represented by the following general formula (1) is subjected to a hydrogenolysis reaction in the presence of a catalyst for producing both end-hydroxyl group-terminated diols according to any of the above embodiments (1) to (5), in the presence of at least one solvent selected from the group consisting of ethers, esters, aromatic hydrocarbon compounds, alicyclic hydrocarbon compounds and aliphatic hydrocarbon compounds, to thereby obtain a both end-hydroxyl group-terminated diol represented by the following general formula (2).
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6);
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6).
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6).
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6);
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6)
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6);
• a both end-hydroxyl group-terminated diol which has been produced by a process for producing a both end-hydroxyl group-terminated diol according to any of above embodiments (8) to (13)
• the present invention relates to a catalyst for producing both end-hydroxyl group-terminated diols, which is usable in a process for producing both end-hydroxyl group-terminated diols represented by general formula (2) by subjecting an epoxy alcohol compound represented by general formula (1) to a hydrogenolysis reaction in the presence of at least one solvent selected from the group consisting of ethers, esters, aromatic hydrocarbon compounds, alicyclic hydrocarbon compounds and aliphatic hydrocarbon compounds, the catalyst comprising at least one element selected from the group consisting of Group V, Group VI, Group VII, Group VIII, Group IX, Group X and Group XI of the periodic table;
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6);
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6).
• the catalyst for producing both end-hydroxyl group-terminated diols comprises at least one element selected from the group consisting of Group V, Group VI, Group VII, Group VIII, Group IX, Group X and Group XI of the periodic table.
• the “periodic table” refers to that according to Nomenclature of Inorganic Chemistry, Revised Edition, 1989, International Union of Pure and Applied Chemistry.
• the catalyst may preferably comprise at least one element selected from the group consisting of Cr, Mn, Fe, Co, Ni, Cu, Mo, W, Re and Ru.
• the catalyst may more preferably comprise at least one element selected from the group consisting of Fe, Co, Ni, Cu, Re and Ru.
• the catalyst for producing both end-hydroxyl group-terminated diols according to the first aspect of the present invention may contain any element other than the above-described elements or any compound, as long as it does not substantially inhibit the intended reaction.
• the above-mentioned at least one element selected from the group consisting of Group V, Group VI, Group VII, Group VIII, Group IX, Group X and Group XI of the periodic table may preferably be contained in the catalyst in an amount of 1% or more, more preferably 2% or more, particularly preferably 5% or more (based on the total mass of the catalyst including the at least one element per se).
• the form or shape of the catalyst for producing both end-hydroxyl group-terminated diols according to the first aspect of the present invention is not particularly limited and may be either of the homogeneous-type catalyst or heterogeneous-type catalyst.
• the heterogeneous catalyst is preferred.
• the homogeneous catalyst is also usable in the present invention.
• the homogeneous catalyst may have any form or shape, as long as the catalyst can be dissolved in a reaction mixture at the time of the reaction. More specifically, for example, the catalyst may have a salt form of the element, such as chloride, bromide, iodide, nitrate, sulfate, carboxylate or carbonate, or a so-called complex form where a ligand is bonded to the element.
• a salt form of the element such as chloride, bromide, iodide, nitrate, sulfate, carboxylate or carbonate, or a so-called complex form where a ligand is bonded to the element.
• the ligand which is usable in the formation of a complex is not particularly limited, and the ligand may be at least one species selected from known ligands. Specific examples thereof may include: carbonyl ligands; phosphorus-containing ligands such as triphenylphosphine, trimethylphosphine, triphenyl phosphite and triphenylphosphine oxide; nitrogen-containing ligands such as ammonia, ethylenediamine and pyridine; ether ligands such as diethyl ether, ethylene glycol dimethyl ether, tetrahydrofuran and 1,4-dioxane; olefin ligands such as ethylene, 1,4-cyclooctadiene and cyclopentadienyl anion; diketonate ligands such as acetylacetonate anion; cyano ligands; halogen ligands such as chloro,
• the homogeneous catalyst may be used in an embodiment wherein the catalyst is preliminarily dissolved in a solvent and then the resultant mixture is used for the reaction, or the catalyst may be used in an embodiment wherein it is preliminarily dissolved in the reactant epoxy alcohol and then the resultant mixture is used for the reaction.
• the catalyst is simultaneously charged to a reaction system together with a solvent and starting material, and then the resultant mixture is subjected to the reaction.
• the catalyst dissolved in a solvent is preliminarily brought into contact with hydrogen so as to be activated, and then the activated catalyst is subjected to the reaction with an epoxy alcohol.
• the form or shape of the element or compound usable in the catalyst is not particularly limited.
• the heterogeneous catalyst may preferably be used in any form of a metal type, a sponge type, an oxide, a hydroxide, a boride, a phosphide, etc.
• an element in the above-described form or a compound containing the element may be used as it is in the intended reaction, or such an element or compound may be used in the reaction as a so-called carrier-type catalyst which has been obtained by causing the element or compound to be carried on an appropriate carrier (or support).
• one preferred example of the catalyst is a sponge-type catalyst.
• the term “sponge-type catalyst” as used herein means a porous metal-containing catalyst. “Sponge Ni” which is one example of the sponge-type catalyst is described, for example, in Tetrahedron Lett. , Vol. 32, No. 40, pp. 5885-5888 (1999).
• examples thereof may include: sponge catalysts such as sponge Fe, sponge-Co, sponge-Ni, sponge-Cu and sponge-Ru; oxide catalysts such as V oxide, Cr oxide, Fe oxide, Co oxide, Ni oxide, Cu oxide, Mo oxide, W oxide, Re oxide, Ru oxide, Rh oxide, Pd oxide, Pt oxide, Cr oxide-Fe oxide, Cr oxide-Cu oxide, Cr oxide-Ni oxide, Cr oxide-Zn oxide and Cr oxide-Cu oxide-Zn oxide; hydroxide catalysts such as Cr hydroxide, Mn hydroxide, Fe hydroxide, Co hydroxide, Ni hydroxide, Cu hydroxide, Ru hydroxide, Rh hydroxide, Pd hydroxide and Pt hydroxide; boride catalysts such as Co boride and Ni boride; and phosphide catalysts such as Ni phosphide. These catalysts may be used individually or in combination of two or more species thereof.
• sponge catalysts such as sponge Fe, sponge-Co, sponge-Ni, sponge-Cu and sponge-Ru
• the carrier usable in such an embodiment is not particularly limited and may appropriately be selected from known carriers. Specific examples thereof may include: activated carbon (hereinafter sometimes simply referred to as “carbon”), silica, alumina, silica alumina, zeolite, titania, zirconia, magnesia, diatomaceous earth (or kieselguhr), barium sulfate, barium carbonate, calcium carbonate and magnesium carbonate.
• carbon activated carbon
• activated carbon silica, alumina, silica alumina, zeolite, titania, zirconia and diatomaceous earth, in view of the effect thereof on reaction, the surface area at the preparation of the catalyst or the industrial practicability such as strength of carrier.
• the amount of the element or compound containing the element and the carrier are preferably such that the amount of the element or compound containing the element is from 0.01 to 150 mass % (or % by mass) based on the total mass of the carrier. If the amount of the element or compound containing the element is less than 0.01 mass %, the concentration of active sites of the catalyst is relatively low and, therefore, a sufficiently high catalytic activity which is practically acceptable cannot be obtained and such an amount is not preferred. On the other hand, if the amount exceeds 150 mass %, the effect of the carrier cannot be exhibited sufficiently, and such an amount is not preferred.
• the amount of the element or compound containing the element is more preferably from 0.05 to 100 mass %, more preferably from 0.1 to 90 mass %, particularly from 0.3 to 30 mass %.
• Specific examples of the carrier-type catalyst for producing both end-hydroxyl group-terminated diols according to the first aspect of the present invention may include: Cr oxide-alumina, Cr oxide-silica, Cr oxide-silica alumina, Cu oxide-alumina, Cu oxide-silica, Mo oxide-alumina, Mo oxide-silica, Re-alumina, Re-silica, Re-activated carbon, Co-diatomaceous earth, Co-alumina, Co-silica, Co-silica alumina, Co-carbon, Ni-diatomaceous earth, Ni-alumina, Ni-silica, Ni-silica alumina, Ni-carbon, Ni—Cu-alumina, Ru-alumina, Ru-silica, Ru-silica alumina, Ru-carbon, Pd-alumina, Pd-silica, Pd-silica alumina, Pd-carbon, Pd-barium sulfate, Pd-calcium carbonate, Pt-alumina, Pt-silica, Pt-silica alumina, P
• the heterogeneous catalyst may most preferably be a sponge-type or carrier-type catalyst containing at least one element selected from the group consisting of Fe, Co, Ni, Cu, Re and Ru, and/or a compound containing at least one of these elements.
• the shape, form, size, etc., of these catalysts are not particularly limited.
• Specific examples of the shape or form of the catalyst may include: powder-type, solid ground or crushed product-type, flake-type, spherical molded article-type, columnar molded article-type and circular molded article-type.
• the size of the catalyst it is possible to use a catalyst having an average particle size of 1 to 1,000 ⁇ m, preferably about 10 to 200 ⁇ m, in the case of the suspension or fluidized bed-type reaction. In the case of the fixed bed-type reaction, it is possible to use a catalyst having an average particle size of about 1 to 20 mm, preferably 3 to 15 mm.
• the shape or form and the particle size of the heterogeneous catalyst may appropriately be selected in view of the suitability for the reaction type.
• the second aspect of the present invention relates to a process for producing the catalyst for producing both end-hydroxyl group-terminated diols according to the first aspect of the present invention.
• the process for producing the catalyst for producing both end-hydroxyl group-terminated diols according to the second aspect of the present invention may be conducted by selecting an optimal method in view of the catalyst for producing both end-hydroxyl group-terminated diols, which is to be produced in this process. In the preparation of this catalyst, it is possible to use any of those processes which, per se, are known in the art.
• each of these catalysts can be produced by a production process comprising the following steps.
• the production process for the catalyst is not limited to these specific processes, but the catalysts may be produced by any of those processes which, per se, are known in the art.
• the sponge-type catalyst can be produced by a production process comprising the following Step (A) and Step (B):
• the carrier-type catalyst can be produced by a production process comprising the following Step (C) and Step (D):
• a metal-type catalyst can be produced by a process wherein a salt, an oxide, a hydroxide, etc., of a metal is treated with a reducing agent such as hydrogen.
• An oxide or hydroxide catalyst can be produced by a process wherein a metal hydroxide or oxide is precipitated by using an alkali, etc., in a metal salt solution, or a method wherein the resultant precipitate is calcined.
• a boride catalyst can be produced by a process wherein a metal salt is treated with tetrahydroborate.
• a phosphide catalyst can be produced by a process wherein a metal solution is treated with a phosphite.
• examples of the production process may include: in addition to the above-describe production processes, a method wherein a hydroxide or oxide of a metal is deposited on a carrier, and the resultant carrier is calcined; a method wherein a carrier is impregnated with a metal salt solution, and the resultant carrier is calcined; a method wherein a carrier having thereon a deposited metal hydroxide or oxide, or a carrier impregnated with a metal salt solution is calcined and then is reduced with a reducing agent, to thereby prepare a catalyst.
• the second aspect of the present invention is not limited to the above-mentioned specific processes, but any process may be used as long as it can produce the catalyst for producing both end-hydroxyl group-terminated diols according to the first aspect of the present invention,
• the third aspect of the present invention relates to a process for producing both end-hydroxyl group-terminated diols, wherein an epoxy alcohol represented by the following general formula (1) is subjected to a hydrogenolysis reaction in the presence of a catalyst for producing both end-hydroxyl group-terminated diols according to any of claims 1-5, in the presence of at least one solvent selected from the group consisting of ethers, esters, aromatic hydrocarbon compounds, alicyclic hydrocarbon compounds and aliphatic hydrocarbon compounds, to thereby obtain a both end-hydroxyl group-terminated diol represented by the following general formula (2).
• an epoxy alcohol represented by the following general formula (1) is subjected to a hydrogenolysis reaction in the presence of a catalyst for producing both end-hydroxyl group-terminated diols according to any of claims 1-5, in the presence of at least one solvent selected from the group consisting of ethers, esters, aromatic hydrocarbon compounds, alicyclic hydrocarbon compounds and aliphatic hydrocarbon compounds, to thereby obtain a both
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6);
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6).
• the compound represented by the general formula (1) to be used in the process for producing both end-hydroxyl group-terminated diols according to the third aspect of the present invention is an epoxy alcohol compound. More specifically, the compound represented by the general formula (1) may include: a compound where a mono-substituted oxirane ring and a hydroxyl group are bonded through a methylene chain having 1 to 6 carbon atoms, or a methylene chain having 1 to 6 carbon atoms which has been substituted with a cycloalkyl group, an aryl group or an alkyl group having 1 to 8 carbon atoms.
• epoxy alcohol compound may include: glycidol, 3,4-epoxy-2-butanol, 1,2-epoxy-3-pentanol, 1,2-epoxy-3-hexanol, 1,2-epoxy-3-heptanol, 2-methyl-3,4-epoxy-2-butanol, 1-phenyl-2,3-epoxy-1-propanol, 1-cyclohexyl-2,3-epoxy-1-propanol, 3,4-epoxy-1-butanol, 4,5-epoxy-1-pentanol, 5,6-epoxy-1-hexanol and 7,8-epoxy-1-octanol.
• the epoxy alcohol compounds usable in the present invention are not limited to these specific compounds.
• glycidol, 3,4-epoxy-1-butanol and 3,4-epoxy-2-butanol are preferred in view of easy availability thereof, the industrial value of the both end-hydroxyl group-terminated diol as the reaction product, etc.
• the process for producing both end-hydroxyl group-terminated diols according to the third aspect of the present invention has a purpose of producing the both end-hydroxyl group-terminated diols with a high selectivity by the regioselective (or regiospecific) hydrogenolysis reaction of the epoxy ring of an epoxy alcohol and is characterized in that the reaction is conducted by using a solvent having a low polarity.
• the use of a solvent is preferred also in view of the control of the ring-opening reaction of the epoxy ring due to dilution therewith, the removal of the heat of reaction, or prevention of a decrease in the hydrogen diffusion efficiency which can be caused due to an increase in the viscosity of the reaction system.
• Specific examples of the solvent usable in the process for producing the both end-hydroxyl group-terminated diols according to the third aspect of the present invention may include: ether solvents such as diethyl ether, dipropyl ether, diisopropyl ether, dibutyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dibutyl ether, tetrahydrofuran and 1,4-dioxane;
• ether solvents such as diethyl ether, dipropyl ether, diisopropyl ether, dibutyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dibutyl ether
• aromatic hydrocarbon solvents such as benzene, toluene and xylene
• alicyclic hydrocarbon solvents such as cyclohexane and methylcyclohexane
• aliphatic hydrocarbon solvents such as pentane, hexane, heptane and octane
• ester solvents such as methyl formate, ethyl formate, butyl formate, methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate and butyl acetate; and
• halogenated hydrocarbon solvents such as dichloromethane, chloroform and 1,2-dichloroethane. These solvents may be used individually or as a mixed solvent of two or more species thereof.
• diethyl ether dibutyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, 1,4-dioxane, benzene, toluene, xylene, cyclohexane, hexane, ethyl acetate, propyl acetate, isopropyl acetate and butyl acetate. It is more preferred to use diethyl ether, ethylene glycol dimethyl ether, 1,4-dioxane, toluene, cyclohexane, hexane and ethyl acetate.
• the amount of the solvent to be used is not particularly limited.
• the solvent may be used in such a range that the concentration of the epoxy alcohol as a reactant becomes 1 to 100 mass %, based on the mass of the epoxy alchol as a reactant toward the sum the epoxy alchol as a reactant and the solvent. If the epoxy alcohol concentration is less than 1 mass %, a practically acceptable reaction rate is less liable to be obtained, or the load for the separation and purification of the product from the reaction mixture containing the solvent becomes heavier, and therefore such an amount of the solvent may be disadvantageous.
• the epoxy alcohol concentration may preferably be 3 to 100 mass %, more preferably from 5 to 100 mass %.
• the hydrogenolysis reaction of the epoxy alcohol can be conducted by contacting the epoxy alcohol with hydrogen in the presence of a catalyst.
• a catalyst As the reaction type, it is possible to use any of known reaction types to be used for hydrogenolysis reaction or hydrogenation reaction, such as continuous-type reaction or batch-type reaction.
• the catalyst to be used in this embodiment may be either a homogenous catalyst or a heterogeneous catalyst.
• the form of the catalyst is not particularly limited and an appropriate form may be selected depending on the type of the reaction.
• reaction type to be used in the third aspect of the present invention may include: in the case of a homogeneous catalyst, a simple stirring tank, a bubble tower-type reaction tank and a tubular reaction tank.
• reaction type may include: in the case of a heterogeneous catalyst, a suspension-bed simple stirring tank, a fluidized-bed bubble tower-type reaction tank, a fluidized-bed tubular reaction tank, a fixed-bed liquid phase flow-system tubular reaction tank, and a fixed-bed trickle bed-system tubular reaction tank.
• the reaction types usable in the present invention are not limited to these specific reaction types.
• the amount of the catalyst to be used for the hydrogenolysis reaction varies depending on the reaction type and is not particularly limited.
• the amount of the homogeneous catalyst used may usually be 0.001 to 10 mass %, preferably 0.01 to 5 mass %, more preferably 0.01 to 3 mass %, based on the reactant epoxy alcohol solution.
• the amount of the heterogeneous catalyst to be used may usually be 0.01 to 100 mass %, preferably 0.1 to 70 mass %, more preferably 0.1 to 50 mass %, based on the reactant epoxy alcohol compound.
• the amount of the catalyst is small, a practically sufficient reaction rate may not be obtained. On the other hand, if the amount of the catalyst is large, a reduction in the reaction yield or an increase in the catalyst cost may undesirably be provided due to an increase in the occurrence of the side reaction.
• the hydrogen pressure at the hydrogenolysis reaction is not particularly limited.
• the reaction may be conducted either under atmospheric pressure condition or under a pressurized condition.
• the reaction may preferably be conducted under a pressurized condition.
• the pressure in terms of the gauge pressure, may usually be in the range of 0 to 50 MPa, preferably 0 to 40 MPa, more preferably 0 to 30 MPa.
• the hydrogenolysis reaction may be conducted at any temperature within a range such that it does not substantially decrease the reaction efficiency due to the catalyst.
• the reaction may usually be conducted at 0 to 200° C., preferably 0 to 180° C. and more preferably 0 to 150° C. If the reaction temperature is less than 0° C., the hydrogenolysis reaction may not proceed at a practically acceptable reaction rate.
• the ring opening reaction of the epoxy ring in the epoxy alcohol compound represented by the general formula (1) is more liable to proceed due the reaction of the starting material epoxy alcohol compounds represented by the general formula (1) with each other, or the reaction between the product both end-hydroxyl group-terminated diol compound represented by the general formula (2) and the epoxy alcohol compound, so that undesired by-products may be disadvantageously produced.
• the epoxy alcohol compound represented by the general formula (1) to be used in the process for producing the both end-hydroxyl group-terminated diols according to the third aspect of the present invention may one which has been prepared by any method.
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6).
• reaction for obtaining the epoxy alcohol compound represented by the general formula (1) may include: a preparation process wherein an unsaturated alcohol is epoxidized (examined Japanese Patent publication (JP-B) Sho. 51-18407); a process wherein an epoxy alcohol is prepared through the hydrolysis of an epichlorohydrin to produce monochlorohydrin and subsequently the resultant monochlorohydrin is subjected to a ring-closing reaction ( Journal of American Chemical Society , Vol. 52, page 1521 (1930)); a preparation process wherein the carbon-carbon double bond of acrolein is epoxidized and the aldehyde group thereof is hydrogenated (U.S. Pat. No.
• the epoxy alcohol compound represented by the general formula (1) to be used in the process for producing the both end-hydroxyl group-terminated diols according to the third aspect of the present invention may preferably be an epoxy alcohol compound which has been obtained by the epoxidation reaction of an unsaturated alcohol, in view of the industrial importance or in view of a lower possibility of contamination due to industrially undesired impurities (such as chlorine-containing compound and aldehyde compound) which can function as a poisoning substance to the catalyst for the hydrogenation reaction.
• industrially undesired impurities such as chlorine-containing compound and aldehyde compound
• the epoxy alcohol compound represented by the general formula (1) to be used in the third aspect of the present invention may preferably be an epoxy alcohol compound represented by the general formula (1) which has been obtained by the epoxidation reaction of an unsaturated alcohol compound represented by formula (3):
• R 1 and R 2 each independently represents hydrogen, an alkyl group having 1 to B carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or an aryl group having 6 to 13 carbon atoms and n represents an integer of 1 to 6).
• Specific examples of the unsaturated alcohol represented by formula (3) may include: allyl alcohol, 3-buten-1-ol and 3-buten-2-ol.
• the unsaturated alcohols usable in the present invention are not limited to these specific compounds.
• reaction mixture containing the epoxy alcohol compound which has been obtained by the epoxidation reaction of the unsaturated alcohol compound is used as the starting material as it is (i.e., substantially without purification), and the resultant reaction mixture is subjected to hydrogenolysis reaction so as to provide the both end-hydroxyl group-terminated diol.
• the product glycidol may be obtained at a conversion (rate) for the glycidol of 60% or more under a desirable condition, and 70% to 100% under a more desirable condition.
• the selectivity factor for the 1,3-propanediol may be 60% or more under a desirable condition.
• the fourth aspect of the present invention is described below.
• the fourth aspect of the present invention relates to a both end-hydroxyl group-terminated diol which has been produced by the process for producing the both end-hydroxyl group-terminated diols according to the third aspect of the present invention.
• the diol has been obtained by the hydrogenolysis reaction of an epoxy alcohol, and therefore, the product both end-hydroxyl group-terminated diol contains substantially no carbonyl compound as an impurity. Accordingly, the both end-hydroxyl group-terminated diol according to the fourth aspect of the present invention can provide an effect such that when polyester, etc., is produced by using such a diol, the generation of coloring or malodor attributable to the carbonyl compound can be suppressed to a low level.
• the amount of the carbonyl compound in the obtained product may preferably be less than 500 ppm, more preferably less than 100 ppm.
• the amount of the carbonyl compound may be measured, e.g., by qualitative determination according to ASTM E411-70 wherein a solution of the condensation product between the carbonyl compound and 2,4-dinitrophenyl hidrazine is qualitatively analysed by using the visible spectrum, etc.
• Carrier gas He 1 ml/min, split ratio: 1/30
• the reactor (vessel) was tightly closed and an operation of pressurizing the inside of the autoclave to 1.0 MPa (gauge pressure) with nitrogen and then depressurizing the inside of the autoclave to 0.0 Mpa (gauge pressure) was repeated 5 times to replace the air in the autoclave with nitrogen. Further, the nitrogen was replaced with hydrogen by the same operation, and a hydrogen pressure of 0.8 MPa (gauge pressure) was finally applied to the autoclave. Subsequently, while the contents of the autoclave were-being stirred at 400 rpm, the temperature in the autoclave was elevated and the reaction was conducted at 80° C. for 5 hours. During the reaction, hydrogen was introduced into the autoclave so as to maintain the reaction pressure at a constant level.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the reactor was tightly closed, and then the contents (atmosphere) of the autoclave were replaced with nitrogen, and further with hydrogen sequentially in the same manner as in Example 1, and a hydrogen pressure of 0.8 MPa (gauge pressure) was finally applied to the autoclave. Subsequently, while the contents of the autoclave were being stirred at 400 rpm, the temperature in the autoclave was elevated and the reaction was conducted at 60° C. for 5 hours. During the reaction, hydrogen was introduced into the autoclave so as to maintain the reaction pressure at a constant level.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the resultant silica carrier which had absorbed therein Aqueous Solution (1) was dried at 100° C. for one hour under a stream of nitrogen. The drying was carried out under a stream of nitrogen at a space velocity 2400 h ⁇ 1 under atmospheric pressure. Then, the silica carrier was reduced at 400° C. for two hours under a stream of hydrogen to thereby prepare a catalyst carrying metal-Co on the silica carrier. The reduction was carried out under a stream of hydrogen at a space velocity 2400 h ⁇ 1 under atmospheric pressure,
• the resultant silica carrier which had absorbed therein Aqueous Solution (2) was dried at 100° C. for one hour under a stream of nitrogen. Then, the silica carrier was reduced at 400° C. for two hours under a stream of hydrogen, to thereby prepare a catalyst carrying metal-Co on the silica carrier.
• the catalyst carrying metal-Co on the silica carrier, which had been prepared in Example 14 was transferred to an autoclave made of stainless steel (mfd. by Taiatsu Glass K.K.) equipped with a stirrer and having an internal volume of 120 ml, then 20 ml of ethanol was added to the catalyst and thoroughly mixed under shaking. Thereafter, the resultant supernatant was removed from the autoclave by decantation. This operation was further repeated twice, and then the same operation was conducted three times except for using 20 ml of 1,2-dimethoxyethane in place of ethanol to effect the solvent replacement. The resultant supernatant which had finally been obtained was removed from the catalyst by decantation, and thereafter, 30 g of 1,2-dimethoxyethane and 5.00 g of glycidol were added thereto.
• the resultant silica carrier which had absorbed therein Aqueous Solution (3) was dried at 100° C. for one hour under a stream of nitrogen. Then, the silica carrier was reduced at 400° C. for two hours under a stream of hydrogen, to thereby prepare a catalyst carrying metal-Co on the silica carrier.
• the catalyst carrying metal-Co on the silica carrier, which had been prepared in Example 16 was transferred to an autoclave made of stainless steel (mfd. by Taiatsu Glass K.K.) equipped with a stirrer and having an internal volume of 120 ml, then 20 ml of ethanol was added to the catalyst and thoroughly mixed under shaking. Thereafter, the resultant supernatant was removed from the autoclave by decantation. This operation was further repeated twice, and then the same operation was conducted three times except for using 20 ml of 1,2-dimethoxyethane in place of ethanol to effect the solvent replacement. The resultant supernatant which had finally been obtained was removed from the catalyst by decantation, and thereafter, 30 g of 1,2-dimethoxyethane and 5.00 g of glycidul were added thereto.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the catalyst carrying metal-Co on the silica carrier, which had been prepared in Example 12 was transferred to an autoclave made of stainless steel (mfd. by Taiatsu Glass K.K.) equipped with a stirrer and having an internal volume of 120 ml, then 20 ml of ethanol was added to the catalyst and thoroughly mixed under shaking. Thereafter, the resultant supernatant was removed from the autoclave by decantation. This operation was further repeated twice, and then the same operation was conducted three times except for using 20 ml of 1,2-dimethoxyethane in place of ethanol to effect the solvent replacement. The resultant supernatant which had finally been obtained was removed from the catalyst by decantation, and thereafter, 30 g of 1,2-dimethoxyethane and 5.00 g of glycidol were added thereto.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the catalyst carrying metal-Co on the silica carrier, which had been prepared in Example 12 was transferred to an autoclave made of stainless steel (mfd. by Taiatsu Glass K.K.) equipped with a stirrer and having an internal volume of 120 ml, then 20 ml of ethanol was added to the catalyst and thoroughly mixed under shaking. Thereafter, the resultant supernatant was removed from the autoclave by decantation. This operation was further repeated twice, and then the same operation was conducted three times except for using 20 ml of 1,2-dimethoxyethane in place of ethanol to effect the solvent replacement. The resultant supernatant which had finally been obtained was removed from the catalyst by decantation, and thereafter, 30 g of 1,2-dimethoxyethane and 5.00 g of glycidol were added thereto.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the resultant silica carrier which had absorbed therein Aqueous Solution (4) was dried at 100° C. for one hour under a stream of nitrogen. Then, the silica carrier was reduced at 400° C. for two hours under a stream of hydrogen, to thereby prepare a catalyst carrying metal-Ru on the silica carrier.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the resultant silica carrier which had absorbed therein Aqueous Solution (5) was dried at 100° C. for one hour under a stream of nitrogen. Then, the silica carrier was reduced at 400° C. for two hours under a stream of hydrogen, to thereby prepare a catalyst carrying metal-nickel carried on the silica carrier.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the catalyst carrying Ni carried on the silica carrier, which had been prepared in Example 25 was transferred to an autoclave made of stainless steel (mfd. by Taiatsu Glass K.K.) equipped with a stirrer and having an internal volume of 120 ml, then 20 ml of ethanol was added to the catalyst and thoroughly mixed under shaking. Thereafter, the resultant supernatant was removed from the autoclave by decantation. This operation was further repeated twice, and then the same operation was conducted three times except for using 20 ml of 1,2-dimethoxyethane in place of ethanol to effect the solvent replacement. The resultant supernatant which had finally been obtained was removed from the catalyst by decantation, and thereafter, 30 g of 1,2-dimethoxyethane and 5.00 g of glycidol were added thereto.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the catalyst carrying Ni carried on the silica carrier, which had been prepared in Example 25 was transferred to an autoclave made of stainless steel (mfd. by Taiatsu Glass K.K.) equipped with a stirrer and having an internal volume of 120 ml, then 20 ml of ethanol was added to the catalyst and thoroughly mixed under shaking. Thereafter, the resultant supernatant was removed from the autoclave by decantation. This operation was further repeated twice, and then the same operation was conducted three times except for using 20 ml of dioxane in place of ethanol to effect the solvent replacement. The resultant supernatant which had finally been obtained was removed from the catalyst by decantation, and thereafter, 30 g of dioxane and 5.00 g of glycidol were added thereto.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the catalyst carrying Ni carried on the silica carrier, which had been prepared in Example 25 was transferred to an autoclave made of stainless steel (mfd. by Taiatsu Glass K.K.) equipped with a stirrer and having an internal volume of 120 ml, then 20 ml of ethanol was added to the catalyst and thoroughly mixed under shaking. Thereafter, the resultant supernatant was removed from the autoclave by decantation. This operation was further repeated twice, and then the same operation was conducted three times except for using 20 ml of dioxane in place of ethanol to effect the solvent replacement. The resultant supernatant which had finally been obtained was removed from the catalyst by decantation, and thereafter, 30 g of dioxane and 5.00 g of glycidol were added thereto.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• the reactor was cooled to room temperature and depressurized, and the contents of the autoclave were replaced with nitrogen, and then the reactor was opened. Thereafter, the supernatant was removed from the autoclave and the supernatant was analyzed by GC.
• Urushibara-Co catalyst (U-Co-BA), which had been prepared in Example 31 was transferred to an autoclave made of stainless steel (mfd. by Taiatsu Glass K.K.) equipped with a stirrer and having an internal volume of 120 ml, then 20 ml of ethanol was added-to the catalyst and thoroughly mixed under shaking. Thereafter, the resultant supernatant was removed from the autoclave by decantation. This operation was further repeated twice, and then the same operation was conducted three times except for using 20 ml of 1,2-dimethoxyethane in place of ethanol to effect the solvent replacement. The resultant supernatant which had finally been obtained was removed from the catalyst by decantation, and thereafter, 30 g of 1,2-dimethoxyethane and 5.00 g of glycidol were added thereto.
• a both end-hydroxyl group-terminated diol e.g., propanediol
• a both end-hydroxyl group-terminated diol having an extremely low carbonyl impurity content
• the-catalyst for producing the both end-hydroxyl group-terminated diols or the process for producing the both end-hydroxyl group-terminated diols by using the catalyst according to the present invention.
• both end-hydroxyl group-terminated diols which can be obtained by the production process for such diols (particularly, 1,3-propanediol) according to the present invention have a high purity as compared with the 1,3-propanediols which had been obtained by conventional methods.
• resins such as polyester

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