Preparation method of transparent colorless polyether carbonate polyol

Abstract

The invention provides a preparation method of colorless transparent polyether carbonate polyol, and relates to the field of high polymer material synthesis. The method comprises the following steps: adding a catalyst, an epoxide, an initiator and carbon dioxide into a fully dried high-pressure reaction kettle, heating to 25-150 DEG C under a stirring condition, carrying out polymerization reaction for 0.5-50 hours, and then purifying and drying to obtain colorless transparent polyether carbonate polyol, the catalyst is a double metal cyanide doped coordination catalyst, and the structure of the catalyst is MxZn (2-x) [Co (CN) 6] Xy.mH2O. NL, by adopting the catalyst, the time of polymerization reaction can be greatly shortened, and the prepared polyether carbonate polyol is transparent, colorless and low in molecular weight.

Description

Technical Field

[0001] The invention relates to the technical field of polymer material synthesis, and in particular to a method for preparing a transparent and colorless polyether carbonate polyol. Background Art

[0002] Carbon dioxide and epoxides can be copolymerized to prepare polyether carbonate polyols. In this reaction, carbon dioxide is stable and difficult to react chemically, so research has mainly focused on catalyst development. Among them, double metal cyanide coordination catalysts are the most widely used heterogeneous catalysts. This catalyst has high activity, simple preparation, and low raw materials, and is widely used in industrial production.

[0003] Patent application CN1044663A discloses a highly active carbon dioxide / epoxide copolymerization catalyst prepared using a high molecular weight organic complexing agent. However, the polymerization generally takes 24 to 60 hours, which is a long reaction time. When used in industrial production, the polymerization cost is also high. Patent CN100484984C discloses a bimetallic complex catalyst that can significantly shorten the reaction time of epoxide and carbon dioxide copolymerization to 2 hours. The use of this catalyst can significantly improve equipment utilization and reduce production costs. However, the catalyst preparation process is complex, and the molecular weight of the polyol product is relatively high and the product is yellow, ranging from 4000 to 8000.

[0004] The prior art lacks a method for preparing transparent and colorless polyether carbonate polyols with a simple preparation process and an appropriate molecular weight of the prepared polyol product. Summary of the Invention

[0005] The present invention aims to provide a method for preparing transparent and colorless polyether carbonate polyol, by providing a doped double metal cyanide coordination catalyst to prepare low molecular weight and transparent and colorless polyether carbonate polyol.

[0006] To achieve the above object, the present invention proposes the following technical solution: a method for preparing a transparent and colorless polyether carbonate polyol, comprising:

[0007] Under the initiation and catalytic conditions of an initiator and a catalyst, epoxide and carbon dioxide undergo a copolymerization reaction in a reactor, and the copolymerization product is purified and dried to obtain a colorless and transparent polyether carbonate polyol;

[0008] Wherein, the catalyst is a doped double metal cyanide coordination catalyst, and its structural formula is as follows:

[0009] M x Zn (2-x) [Co(CN)6]X y mH2O nL, where:

[0010] M is one of the divalent metals chromium, nickel, and copper;

[0011] X is a halogen atom selected from fluorine, chlorine, bromine and iodine;

[0012] L is one of water-soluble organic compounds or polymers having coordinating atoms, wherein the coordinating atoms include oxygen, nitrogen, phosphorus, and sulfur;

[0013] The subscripts x, y, m, and n are all positive numbers.

[0014] Furthermore, the amount of the doped double metal cyanide coordination catalyst is 0.01 to 10% by weight of the epoxide.

[0015] Furthermore, the water-soluble organic compound or polymer is one of ethylene glycol dimethyl ether, ethylene glycol monomethyl ether, 1-methoxy-2-propanol, ethylene glycol, 1,2-propylene glycol, tert-butanol, 1,4-dioxane, polyethylene glycol, polyether polyol, polyvinyl alkyl ether, polyoxymethylene, and polyester.

[0016] Furthermore, the epoxide is one of propylene oxide, ethylene oxide, cyclohexene oxide, butylene oxide, isobutylene oxide, and cyclopentene oxide.

[0017] Furthermore, the initiator is water, small molecule alcohols, phenols, thiols, hydroxyl-containing polymers or oligomers.

[0018] Furthermore, the amount of the initiator is 0.01 to 20% by weight of the epoxide.

[0019] Furthermore, the reaction pressure of the copolymerization reaction is 0.1-10 MPa.

[0020] Furthermore, the reaction temperature of the copolymerization reaction is 25 to 150°C.

[0021] Furthermore, the reaction time of the copolymerization reaction is 0.5 to 50 hours.

[0022] It can be seen from the above technical solutions that the technical solutions of the present invention have the following beneficial effects:

[0023] The present invention discloses a method for preparing transparent and colorless polyether carbonate polyols. By proposing a new doped double metal cyanide coordination catalyst, the catalyst is used to efficiently prepare transparent, colorless and low molecular weight polyether carbonate polyols, thereby solving the problems of the prior art in preparing polyether carbonate polyols, such as the complex process, high molecular weight and yellow color of the polyol products. The structural formula of the doped double metal cyanide coordination catalyst is M x Zn (2-x) [Co(CN)6]X y·mH2O·nL, where: M is a divalent metal selected from chromium, nickel, and copper; X is a halogen atom selected from fluorine, chlorine, bromine, and iodine; L is a water-soluble organic compound or polymer with a coordinating atom; and subscripts x, y, m, and n are all positive numbers.

[0024] The method for preparing polyether carbonate polyol disclosed in the present invention firstly requires fewer types of raw materials, has a simple process flow, and is low in cost. Secondly, the catalyst has a simple structure and is used in small amounts, the catalytic copolymerization reaction of carbon dioxide and epoxide takes a short time, and the prepared polyether carbonate polyol product has a low molecular weight. In addition, compared with existing defective yellow products, the polyether carbonate polyol product of the present solution is colorless, transparent, and of high quality.

[0025] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, to the extent such concepts are not mutually inconsistent, can be considered to be part of the inventive subject matter of this disclosure.

[0026] The foregoing and other aspects, embodiments, and features of the present invention will be more fully understood from the following description in conjunction with specific examples. Other additional aspects of the present invention, such as features and / or beneficial effects of the exemplary embodiments, will become apparent from the following description or through practice of specific embodiments according to the present invention. DETAILED DESCRIPTION

[0027] To further clarify the objectives, technical solutions, and advantages of the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a portion of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments derived by persons of ordinary skill in the art without requiring creative effort are within the scope of protection of the present invention. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meanings understood by persons of ordinary skill in the field to which the present invention pertains.

[0028] The words "first," "second," and similar terms used in the patent application specification and claims of the present invention do not indicate any order, quantity, or importance, but are only used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "a," "an," "the," and similar terms do not indicate a limit on quantity, but rather indicate the presence of at least one. Words such as "include" or "comprises" mean that the elements or objects preceding "include" or "comprises" include the features, wholes, steps, operations, elements, and / or components listed after "include" or "comprises," and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their collections.

[0029] The prior art disclosed methods or catalysts for preparing polyether carbonate polyols have the problems of long reaction time and high reaction cost, on the one hand, and high product molecular weight and poor product quality, on the other hand. The present invention aims to provide a method for preparing transparent and colorless polyether carbonate polyols. The method uses a doped double metal cyanide coordination catalyst, which simplifies the preparation process, achieves a suitable product molecular weight, and effectively reduces production costs.

[0030] Specifically, a method for preparing a transparent and colorless polyether carbonate polyol comprises: copolymerizing an epoxide and carbon dioxide in a reactor under the initiation and catalytic conditions of an initiator and a catalyst, wherein the copolymerization reaction conditions are: a reaction pressure of 0.1 to 10 MPa, a reaction temperature of 25 to 150° C., and a reaction time of 0.5 to 50 hours; and purifying and drying the copolymerization product to obtain a colorless and transparent polyether carbonate polyol;

[0031] Wherein, the catalyst is a doped double metal cyanide coordination catalyst, and its dosage is 0.01 to 10% by weight of the epoxide, and its structural formula is as follows: M x Zn (2-x) [Co(CN)6]X y ·mH2O·nL, wherein: M is one of the divalent metals chromium, nickel, and copper; X is one of the halogen atoms fluorine, chlorine, bromine, and iodine; L is one of the water-soluble organic compounds or polymers having coordinating atoms, wherein the coordinating atoms include oxygen, nitrogen, phosphorus, and sulfur, for example, the water-soluble organic compound or polymer is one of ethylene glycol dimethyl ether, ethylene glycol monomethyl ether, 1-methoxy-2-propanol, ethylene glycol, 1,2-propylene glycol, tert-butanol, 1,4-dioxane, polyethylene glycol, polyether polyol, polyvinyl alkyl ether, polyoxymethylene, and polyester; and the subscripts x, y, m, and n are all positive numbers.

[0032] In the above reaction, the epoxide is one of propylene oxide, ethylene oxide, cyclohexene oxide, butylene oxide, isobutylene oxide, and cyclopentene oxide; the initiator is water, small molecule alcohols, phenols, thiols, hydroxyl-containing polymers or oligomers; and the amount of the initiator is 0.01 to 20% by weight of the epoxide.

[0033] The preparation method of the transparent and colorless polyether carbonate polyol disclosed in the present invention is further described in detail below with reference to specific examples.

[0034] Example 1

[0035] 1) Preparation of doped double metal cyanide coordination catalyst

[0036] Under stirring, a solution of 0.3g of K3Co(CN)6 in 4.0ml of deionized water was added dropwise to a mixture of 0.49g of ZnCl2 and 0.47g of NiCl2 in 5.0ml of deionized water and 1ml of tert-butanol. After reacting at 25°C for 3 hours, the resulting suspension was washed with water and tert-butanol in a 1:1 volume ratio and then centrifuged. This process was repeated three more times. Finally, the suspension was washed with tert-butanol, centrifuged, and dried under vacuum at 50°C to constant weight, yielding 1.12g of a solid powder. Scanning electron microscopy-energy dispersive X-ray diffraction (SEM-EDX) analysis revealed the catalyst structure to be NiZn[Co(CN)6]Cl·2H2O·4t-BuOH.

[0037] 2) Copolymerization of propylene oxide and CO2 catalyzed by doped double metal cyanide coordination catalyst

[0038] To a thoroughly dried 100 ml autoclave was added 18 mg of the catalyst prepared in Example 1, 7.2 g of dried octanediol, and 35 ml of propylene oxide. The mixture was heated to 115° C. with stirring, and carbon dioxide was added to 25 bar. After reacting for 1 h, the apparatus was cooled, and volatile substances such as the propylene oxide raw material and by-products were removed under vacuum to obtain 32 g of a polyether carbonate polyol having a carbonate content of 32% and a molecular weight of 2000 g / mol.

[0039] Example 2

[0040] The only difference between Example 2 and Example 1 is that the copolymerization of propylene oxide and CO2 is catalyzed by the doped double metal cyanide coordination catalyst. Specifically:

[0041] To a thoroughly dried 100 ml autoclave was added 18 mg of the catalyst prepared in Example 1, 7.2 g of dried octanediol, and 25 ml of ethylene oxide. The mixture was heated to 115° C. with stirring, and carbon dioxide was added to 25 bar. After reacting for 1 h, the apparatus was cooled, and volatile substances such as the ethylene oxide raw material and by-products were removed under vacuum to obtain 28 g of a polyether carbonate polyol with a carbonate content of 35% and a molecular weight of 1800 g / mol.

[0042] Example 3

[0043] The only difference between Example 3 and Example 1 is that the copolymerization of propylene oxide and CO2 is catalyzed by the doped double metal cyanide coordination catalyst. Specifically:

[0044] To a thoroughly dried 100 ml autoclave were added 18 mg of the catalyst prepared in Example 1, 7.2 g of dried octanediol, and 50.6 ml of cyclohexene oxide. The mixture was heated to 115°C with stirring, and carbon dioxide was added to 25 bar. After reacting for 1 hour, the apparatus was cooled, and volatile substances such as the ethylene oxide starting material and by-products were removed under vacuum to obtain 47 g of a polyether carbonate polyol with a carbonate content of 31% and a molecular weight of 1900 g / mol.

[0045] Example 4

[0046] The only difference between Example 4 and Example 1 is that the copolymerization of propylene oxide and CO2 is catalyzed by the doped double metal cyanide coordination catalyst. Specifically:

[0047] To a thoroughly dried 100 ml autoclave was added 18 mg of the catalyst prepared in Example 1, 4.6 g of dried 1,4-butanediol, and 35 ml of propylene oxide. The mixture was heated to 115° C. with stirring, and carbon dioxide was added to 25 bar. After reacting for 1 h, the apparatus was cooled, and volatile substances such as the propylene oxide raw material and by-products were removed by vacuum removal to obtain 33 g of a polyether carbonate polyol with a carbonate content of 32% and a molecular weight of 2100 g / mol.

[0048] Example 5

[0049] The only difference between Example 5 and Example 1 is that the copolymerization of propylene oxide and CO2 is catalyzed by the doped double metal cyanide coordination catalyst. Specifically:

[0050] To a thoroughly dried 100 ml autoclave was added 18 mg of the catalyst prepared in Example 1, 20.4 g of dried polyether polyol (400 g / mol), and 35 ml of propylene oxide. The mixture was heated to 115° C. with stirring, and carbon dioxide was added to 25 bar. After reacting for 1 h, the apparatus was cooled, and volatile substances such as the propylene oxide raw material and by-products were removed under vacuum to obtain 45 g of a polyether carbonate polyol having a carbonate content of 30% and a molecular weight of 2500 g / mol.

[0051] Example 6

[0052] The difference between Example 6 and Example 1 is that the copolymerization of propylene oxide and CO2 is catalyzed by the doped double metal cyanide coordination catalyst. Specifically:

[0053] To a thoroughly dried 100 ml autoclave was added 18 mg of the catalyst prepared in Example 1, 7.2 g of dried octanediol, and 35 ml of propylene oxide. The mixture was heated to 115° C. with stirring, and carbon dioxide was added to 5 bar. After reacting for 1 h, the apparatus was cooled, and volatile substances such as the propylene oxide raw material and by-products were removed under vacuum to obtain 30 g of a polyether carbonate polyol having a carbonate content of 31% and a molecular weight of 1000 g / mol.

[0054] Example 7

[0055] The difference between Example 7 and Example 1 is that the copolymerization of propylene oxide and CO2 is catalyzed by the doped double metal cyanide coordination catalyst. Specifically:

[0056] To a thoroughly dried 100 ml autoclave was added 18 mg of the catalyst prepared in Example 1, 7.2 g of dried octanediol, and 35 ml of propylene oxide. The mixture was heated to 115° C. with stirring, and carbon dioxide was added to 95 bar. After reacting for 1 h, the apparatus was cooled, and volatile substances such as the propylene oxide raw material and by-products were removed under vacuum to obtain 36 g of a polyether carbonate polyol with a carbonate content of 35% and a molecular weight of 2800 g / mol.

[0057] Example 8

[0058] The difference between Example 8 and Example 1 is that the copolymerization of propylene oxide and CO2 is catalyzed by the doped double metal cyanide coordination catalyst. Specifically:

[0059] To a thoroughly dried 100 ml autoclave was added 18 mg of the catalyst prepared in Example 1, 7.2 g of dried octanediol, and 35 ml of propylene oxide. The mixture was heated to 50° C. with stirring, and carbon dioxide was added to 25 bar. After reacting for 10 h, the apparatus was cooled, and volatile substances such as the propylene oxide raw material and by-products were removed under vacuum to obtain 30 g of a polyether carbonate polyol having a carbonate content of 30% and a molecular weight of 1600 g / mol.

[0060] Example 9

[0061] The difference between Example 9 and Example 1 is that the copolymerization of propylene oxide and CO2 is catalyzed by the doped double metal cyanide coordination catalyst. Specifically:

[0062] To a thoroughly dried 100 ml autoclave was added 18 mg of the catalyst prepared in Example 1, 7.2 g of dried octanediol, and 35 ml of propylene oxide. The mixture was heated to 150° C. with stirring, and carbon dioxide was added to 25 bar. After reacting for 1 h, the apparatus was cooled, and volatile substances such as the propylene oxide raw material and by-products were removed under vacuum to obtain 33 g of a polyether carbonate polyol with a carbonate content of 34% and a molecular weight of 2100 g / mol.

[0063] Example 10

[0064] The difference between Example 10 and Example 1 is that the copolymerization of propylene oxide and CO2 is catalyzed by the doped double metal cyanide coordination catalyst. Specifically:

[0065] To a thoroughly dried 100 ml autoclave was added 18 mg of the catalyst prepared in Example 1, 7.2 g of dried octanediol, and 35 ml of propylene oxide. The mixture was heated to 150° C. with stirring, and carbon dioxide was added to 25 bar. After reacting for 0.5 h, the apparatus was cooled, and volatile substances such as the propylene oxide raw material and by-products were removed under vacuum to obtain 35 g of a polyether carbonate polyol with a carbonate content of 32% and a molecular weight of 2500 g / mol.

[0066] Example 11

[0067] The difference between Example 11 and Example 1 is that the copolymerization of propylene oxide and CO2 is catalyzed by the doped double metal cyanide coordination catalyst. Specifically:

[0068] To a thoroughly dried 100 ml autoclave was added 18 mg of the catalyst prepared in Example 1, 7.2 g of dried octanediol, and 35 ml of propylene oxide. The mixture was heated to 150° C. with stirring, and carbon dioxide was added to 25 bar. After reacting for 50 h, the apparatus was cooled, and volatile substances such as the propylene oxide raw material and by-products were removed under vacuum to obtain 34 g of a polyether carbonate polyol with a carbonate content of 33% and a molecular weight of 2000 g / mol.

[0069] Example 12

[0070] Example 12 aims to provide a doped double metal cyanide coordination catalyst different from Example 1, specifically:

[0071] A 4.0-ml deionized solution of 0.3 g K₃Co(CN)₆ was added dropwise to a mixture of 0.49 g ZnCl₂ and 0.57 g CrCl₂ in 5.0 ml deionized water and 1 ml tert-butanol under stirring. After reacting at 25°C for 3 hours, the resulting suspension was washed with water and tert-butanol in a 1:1 volume ratio and then centrifuged. This process was repeated three more times. Finally, the mixture was washed with tert-butanol, centrifuged, and dried under vacuum at 50°C to constant weight, yielding 1.28 g of a solid powder. Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDX) analysis revealed the catalyst structure to be CrZn[Co(CN)₆]Cl·2H₂O·4t-BuOH.

[0072] Example 13

[0073] Example 13 proposes a doped double metal cyanide coordination catalyst different from that of Example 1, specifically differing in the bimetallic species doped in the catalyst: A 4.0 ml deionized solution of 0.3 g K₃Co(CN)₆ was added dropwise to a mixture of 0.81 g ZnBr₂ and 1.05 g CrBr₂ in 5.0 ml deionized water and 1 ml tert-butanol under stirring. After reacting at 25°C for 3 hours, the resulting suspension was washed with water and tert-butanol in a 1:1 volume ratio and centrifuged. This process was repeated three more times, followed by a final wash with tert-butanol, centrifugation, and vacuum drying at 50°C to constant weight to yield 1.88 g of a solid powder. Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDX) analysis revealed the catalyst structure to be CrZn[Co(CN)₆]Br·2H₂O·4t-BuOH.

[0074] Example 14

[0075] Example 14 proposes a doped double metal cyanide coordination catalyst that differs from Example 1, specifically in the presence of a different halogen element. A 4.0 ml deionized solution of 0.3 g of K₃Co(CN)₆ was added dropwise to a mixture of 0.49 g of ZnCl₂ and 0.47 g of NiCl₂ in 5.0 ml of deionized water and 1 ml of ethylene glycol dimethyl ether (DMET) under stirring. After reacting at 25°C for 3 hours, the resulting suspension was washed with water and DMET in a 1:1 volume ratio, and then centrifuged. This process was repeated three more times, followed by washing with DMET, centrifugation, and vacuum drying at 50°C to constant weight to yield 1.19 g of a solid powder. Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDX) analysis revealed the catalyst structure to be NiZn[Co(CN)₆]Cl·2H₂O·4DMET.

[0076] Example 15

[0077] Example 15 provides a doped double metal cyanide coordination catalyst different from that of Example 1. Specifically, the water-soluble organic compound or polymer used in preparing the catalyst is different: 4.0 ml of a deionized solution of 0.3 g of K₃Co(CN)₆ was added dropwise to a mixture of 0.49 g of ZnCl₂ and 0.47 g of NiCl₂ in 5.0 ml of deionized water and 1 ml of polyether polyol (PP) (molecular weight 1000 g / mol) under stirring. After reacting at 25°C for 3 hours, the resulting suspension was washed with water and polyether polyol (molecular weight 1000 g / mol) in a 1:1 volume ratio and centrifuged. This process was repeated three more times. Finally, the suspension was washed with polyether polyol (molecular weight 1000 g / mol), centrifuged, and dried under vacuum at 50°C to constant weight to yield 1.08 g of a solid powder. Scanning electron microscopy (SEM-EDX) analysis revealed the catalyst structure to be NiZn[Co(CN)₆]Cl·2H₂O·4PP.

[0078] In summary, the above embodiments show that the epoxides proposed in the present invention can all generate polyether carbonate polyols under the conditions of reaction pressure of 0.1-10 MPa, reaction temperature of 25-150°C and reaction time of 0.5-50 h. Moreover, the reaction temperature and reaction time have little effect on the polymerization reaction. The present invention proposes a doped double metal cyanide coordination catalyst with a specific surface area of ​​600-750 g / m 2 , and the catalytic effect is good; therefore, when it is applied to the preparation of transparent and colorless polyether carbonate polyols, compared with the existing technology, high-quality, transparent and colorless polyether carbonate polyols can be prepared with a simple process, easily obtained raw materials, lower cost and shorter time.

[0079] While the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Persons skilled in the art will readily appreciate that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A method for preparing a transparent and colorless polyether carbonate polyol, characterized in that: include: Under the initiation and catalytic conditions of the initiator and the catalyst, the epoxide and the carbon dioxide undergo a copolymerization reaction in a reactor, and the copolymerization product is purified and dried to obtain a colorless and transparent polyether carbonate polyol; Wherein, the catalyst is a doped double metal cyanide coordination catalyst, and its structural formula is as follows: M x Zn (2-x) [Co(CN)6]X y ·mH2O·nL, where: M is one of the divalent metals chromium, nickel and copper; X is a halogen atom selected from the group consisting of fluorine, chlorine, bromine and iodine; L is one of water-soluble organic compounds or polymers having coordinating atoms, wherein the coordinating atoms include oxygen, nitrogen, phosphorus, and sulfur; Subscripts x, y, m, and n are all positive numbers.

2. The method for preparing the transparent colorless polyether carbonate polyol according to claim 1, characterized in that: The amount of the doped double metal cyanide coordination catalyst used is 0.01 to 10% of the weight of the epoxide.

3. The method for preparing the transparent colorless polyether carbonate polyol according to claim 1, characterized in that: The water-soluble organic compound or polymer is one of ethylene glycol dimethyl ether, ethylene glycol monomethyl ether, 1-methoxy-2-propanol, ethylene glycol, 1,2-propylene glycol, tert-butyl alcohol, 1,4-dioxane, polyethylene glycol, polyether polyol, polyvinyl alkyl ether, polyoxymethylene, and polyester.

4. The method for preparing the transparent colorless polyether carbonate polyol according to claim 1, characterized in that: The epoxide is one of propylene oxide, ethylene oxide, cyclohexene oxide, butylene oxide, isobutylene oxide and cyclopentene oxide.

5. The method for preparing the transparent colorless polyether carbonate polyol according to claim 1, characterized in that: The initiator is water, small molecule alcohols, phenols, thiols, polymers or oligomers containing hydroxyl groups.

6. The method for preparing the transparent colorless polyether carbonate polyol according to claim 1, characterized in that: The amount of the initiator used is 0.01-20% by weight of the epoxide.

7. The method for preparing the transparent colorless polyether carbonate polyol according to claim 1, characterized in that: The reaction pressure of the copolymerization reaction is 0.1-10 MPa.

8. The method for preparing the transparent colorless polyether carbonate polyol according to claim 1, characterized in that: The reaction temperature of the copolymerization reaction is 25-150°C.

9. The method for preparing the transparent colorless polyether carbonate polyol according to claim 1, characterized in that: The reaction time of the copolymerization reaction is 0.5 to 50 hours.