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2,4,6-Trioxaheptane, also known as Diethylene glycol dimethyl ether and Diglyme, is a colorless, organic liquid with the molecular formula C6H14O3. It is a polar aprotic solvent that is commonly used in various applications due to its unique properties.

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  • 628-90-0 Structure
  • Basic information

    1. Product Name: 2,4,6-Trioxaheptane
    2. Synonyms: 2,4,6-Trioxaheptane;Methoxy(MethoxyMethoxy)Methane
    3. CAS NO:628-90-0
    4. Molecular Formula: C4H10O3
    5. Molecular Weight: 106.1204
    6. EINECS: N/A
    7. Product Categories: N/A
    8. Mol File: 628-90-0.mol
  • Chemical Properties

    1. Melting Point: -65 °C
    2. Boiling Point: 96℃
    3. Flash Point: 7.3°C
    4. Appearance: /
    5. Density: 0.933g/cm3
    6. Vapor Pressure: 179mmHg at 25°C
    7. Refractive Index: 1.371
    8. Storage Temp.: N/A
    9. Solubility: N/A
    10. CAS DataBase Reference: 2,4,6-Trioxaheptane(CAS DataBase Reference)
    11. NIST Chemistry Reference: 2,4,6-Trioxaheptane(628-90-0)
    12. EPA Substance Registry System: 2,4,6-Trioxaheptane(628-90-0)
  • Safety Data

    1. Hazard Codes: N/A
    2. Statements: N/A
    3. Safety Statements: N/A
    4. WGK Germany:
    5. RTECS:
    6. HazardClass: N/A
    7. PackingGroup: N/A
    8. Hazardous Substances Data: 628-90-0(Hazardous Substances Data)

628-90-0 Usage

Uses

Used in Organic Synthesis:
2,4,6-Trioxaheptane is used as a solvent in organic synthesis for facilitating various chemical reactions. Its polar aprotic nature makes it a suitable medium for a wide range of organic reactions, enhancing the efficiency and selectivity of the processes.
Used in Metal Coordination:
2,4,6-Trioxaheptane is used as a coordinating ligand for some metals, playing a crucial role in the formation and stabilization of metal complexes. This application is particularly relevant in the field of inorganic chemistry and materials science.
Used in Battery Preparation:
2,4,6-Trioxaheptane is used in the preparation of certain batteries due to its ability to dissolve electrolytes. This property makes it a valuable component in the development of advanced battery technologies, contributing to improved performance and energy storage capabilities.
Used in Heat Transfer Fluids:
2,4,6-Trioxaheptane is used as a component in the production of heat transfer fluids. Its thermal stability and ability to transfer heat efficiently make it a suitable candidate for applications in industrial processes and systems that require effective heat management.
Used in Dielectric Fluids:
2,4,6-Trioxaheptane is used in the production of dielectric fluids, which are essential in various electrical applications. Its dielectric properties contribute to the insulation and safety of electrical systems, making it a valuable component in the electrical industry.
However, it is important to note that 2,4,6-Trioxaheptane poses potential health hazards such as skin and eye irritation upon direct exposure. Additionally, it has potential environmental hazards as it is harmful to aquatic life, which necessitates careful handling and disposal to minimize its impact on ecosystems.

Check Digit Verification of cas no

The CAS Registry Mumber 628-90-0 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,2 and 8 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 628-90:
(5*6)+(4*2)+(3*8)+(2*9)+(1*0)=80
80 % 10 = 0
So 628-90-0 is a valid CAS Registry Number.
InChI:InChI=1/C4H10O3/c1-5-3-7-4-6-2/h3-4H2,1-2H3

628-90-0SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 19, 2017

Revision Date: Aug 19, 2017

1.Identification

1.1 GHS Product identifier

Product name methoxy(methoxymethoxy)methane

1.2 Other means of identification

Product number -
Other names 17beta-methoxymethyl ether

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:628-90-0 SDS

628-90-0Synthetic route

methanol
67-56-1

methanol

formaldehyd
50-00-0

formaldehyd

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

Conditions
ConditionsYield
With sulfonic acid resin at 80 - 95℃; Temperature; Reagent/catalyst;95.5%
With ZrO2#dotLa2O3 at 80℃; for 4h;6.1%
With C16H36NO3S(1+)*CH3O4S(1-) at 125 - 130℃; under 26252.6 - 30003 Torr; Reagent/catalyst; Inert atmosphere;
methanol
67-56-1

methanol

diethyl ether
60-29-7

diethyl ether

bromomethylmethyl ether
89125-42-8

bromomethylmethyl ether

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

Conditions
ConditionsYield
In ethyl acetate; N,N-dimethyl-formamide; mineral oil90%
formaldehyd
50-00-0

formaldehyd

Dimethoxymethane
109-87-5

Dimethoxymethane

A

bis-methoxymethoxy-methane
13353-03-2

bis-methoxymethoxy-methane

B

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

Conditions
ConditionsYield
With sulfuric acid at 109.99℃; under 7500.75 Torr;A n/a
B 26%
methanol
67-56-1

methanol

formaldehyd
50-00-0

formaldehyd

A

bis-methoxymethoxy-methane
13353-03-2

bis-methoxymethoxy-methane

B

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

C

POMM4
13352-75-5

POMM4

Conditions
ConditionsYield
With ZrO2#dotLa2O3 at 130℃; under 6000.6 Torr; for 4h; Pressure; Reagent/catalyst;A 23%
B 23.3%
C 14.9%
formaldehyd
50-00-0

formaldehyd

Dimethoxymethane
109-87-5

Dimethoxymethane

A

bis-methoxymethoxy-methane
13353-03-2

bis-methoxymethoxy-methane

B

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

C

POMM4
13352-75-5

POMM4

Conditions
ConditionsYield
With La2O3 doped titania at 130℃; under 4500.45 Torr; for 4h; Reagent/catalyst; Pressure; Autoclave;A 22.4%
B 17.5%
C 8.4%
With macroporous strong acidic styrene type cation exchange resin catalyst at 100℃; under 15001.5 Torr; for 10h; Temperature; Time; Overall yield = 51.66 %;
With Cl -/TiO2-La2O3/SBA-15 (Si/Al=38) at 130℃; under 4500.45 Torr; for 4h; Reagent/catalyst; Temperature; Pressure;
17beta-acetoxy-3,3-ethylenedioxy-16alpha,17alpha-methylene-estra-5(10),9(11)-diene

17beta-acetoxy-3,3-ethylenedioxy-16alpha,17alpha-methylene-estra-5(10),9(11)-diene

chloromethyl methyl ether
107-30-2

chloromethyl methyl ether

A

3,3-ethylenedioxy-17beta-methoxymethylene-oxy-16alpha,17alpha-methylene-estra-5(10),9(11)-diene

3,3-ethylenedioxy-17beta-methoxymethylene-oxy-16alpha,17alpha-methylene-estra-5(10),9(11)-diene

B

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

Conditions
ConditionsYield
With naphthalene; lithium In tetrahydrofuran; water
1,3,5-Trioxan
110-88-3

1,3,5-Trioxan

1,1-dimethoxyethane
534-15-6

1,1-dimethoxyethane

A

C11H24O10

C11H24O10

B

C13H28O12

C13H28O12

C

bis-methoxymethoxy-methane
13353-03-2

bis-methoxymethoxy-methane

D

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

E

POMM4
13352-75-5

POMM4

F

CH3-(OCH2)8-OCH3
13352-78-8

CH3-(OCH2)8-OCH3

G

Methoxymethoxymethoxymethoxymethoxy-methoxymethoxymethoxymethoxymethoxymethoxy-methane
54261-86-8

Methoxymethoxymethoxymethoxymethoxy-methoxymethoxymethoxymethoxymethoxymethoxy-methane

H

POMM5
13352-76-6

POMM5

I

CH3-(OCH2)7-OCH3
13353-04-3

CH3-(OCH2)7-OCH3

J

CH3-(OCH2)6-OCH3
13352-77-7

CH3-(OCH2)6-OCH3

Conditions
ConditionsYield
Amberlite IR 120 at 100℃; for 24h; Product distribution / selectivity;
trifluorormethanesulfonic acid at 100℃; for 40h; Product distribution / selectivity;
sulfuric acid In water at 100℃; for 12h; Product distribution / selectivity;
1,3,5-Trioxan
110-88-3

1,3,5-Trioxan

1,1-dimethoxyethane
534-15-6

1,1-dimethoxyethane

A

bis-methoxymethoxy-methane
13353-03-2

bis-methoxymethoxy-methane

B

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

C

POMM4
13352-75-5

POMM4

Conditions
ConditionsYield
sulfuric acid In water at 100℃; for 16h; Product distribution / selectivity;
formaldehyd
50-00-0

formaldehyd

1,1-dimethoxyethane
534-15-6

1,1-dimethoxyethane

A

C11H24O10

C11H24O10

B

C13H28O12

C13H28O12

C

bis-methoxymethoxy-methane
13353-03-2

bis-methoxymethoxy-methane

D

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

E

POMM4
13352-75-5

POMM4

F

CH3-(OCH2)8-OCH3
13352-78-8

CH3-(OCH2)8-OCH3

G

Methoxymethoxymethoxymethoxymethoxy-methoxymethoxymethoxymethoxymethoxymethoxy-methane
54261-86-8

Methoxymethoxymethoxymethoxymethoxy-methoxymethoxymethoxymethoxymethoxymethoxy-methane

H

POMM5
13352-76-6

POMM5

I

CH3-(OCH2)7-OCH3
13353-04-3

CH3-(OCH2)7-OCH3

J

CH3-(OCH2)6-OCH3
13352-77-7

CH3-(OCH2)6-OCH3

Conditions
ConditionsYield
Amberlite IR 120 at 100℃; for 8h; Product distribution / selectivity;
formaldehyd
50-00-0

formaldehyd

Dimethoxymethane
109-87-5

Dimethoxymethane

A

1,3,5-Trioxan
110-88-3

1,3,5-Trioxan

B

C11H24O10

C11H24O10

C

C13H28O12

C13H28O12

D

bis-methoxymethoxy-methane
13353-03-2

bis-methoxymethoxy-methane

E

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

F

POMM4
13352-75-5

POMM4

G

CH3-(OCH2)8-OCH3
13352-78-8

CH3-(OCH2)8-OCH3

H

Methoxymethoxymethoxymethoxymethoxy-methoxymethoxymethoxymethoxymethoxymethoxy-methane
54261-86-8

Methoxymethoxymethoxymethoxymethoxy-methoxymethoxymethoxymethoxymethoxymethoxy-methane

I

CH3-(OCH2)7-OCH3
13353-04-3

CH3-(OCH2)7-OCH3

J

C14H30O13

C14H30O13

K

C15H32O14

C15H32O14

L

CH3-(OCH2)6-OCH3
13352-77-7

CH3-(OCH2)6-OCH3

Conditions
ConditionsYield
With sulfuric acid at 55 - 115℃; Inert atmosphere;
3-methylbut-2-enal, pyridinium trifluoromethanesulfonate

3-methylbut-2-enal, pyridinium trifluoromethanesulfonate

2-methylpropan-1-amine, p-toluenesulfonic acid monohydrate

2-methylpropan-1-amine, p-toluenesulfonic acid monohydrate

chloromethyl methyl ether
107-30-2

chloromethyl methyl ether

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

Conditions
ConditionsYield
With pyridine; hydrogenchloride; diisobutylaluminium hydride; N-ethyl-N,N-diisopropylamine In tetrahydrofuran; dichloromethane; toluene
Dimethyl ether
115-10-6

Dimethyl ether

A

methanol
67-56-1

methanol

B

formaldehyd
50-00-0

formaldehyd

C

methane
34557-54-5

methane

D

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

E

carbon monoxide
201230-82-2

carbon monoxide

Conditions
ConditionsYield
With oxygen at 19.84℃; Flow reactor; Green chemistry;
Dimethyl ether
115-10-6

Dimethyl ether

A

methanol
67-56-1

methanol

B

formaldehyd
50-00-0

formaldehyd

C

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

D

carbon monoxide
201230-82-2

carbon monoxide

Conditions
ConditionsYield
With oxygen at 19.84℃; Flow reactor; Green chemistry;
Dimethoxymethane
109-87-5

Dimethoxymethane

A

methanol
67-56-1

methanol

B

formaldehyd
50-00-0

formaldehyd

C

methane
34557-54-5

methane

D

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

E

carbon monoxide
201230-82-2

carbon monoxide

Conditions
ConditionsYield
With oxygen at 19.84℃; Flow reactor; Green chemistry;
Dimethoxymethane
109-87-5

Dimethoxymethane

A

methanol
67-56-1

methanol

B

formaldehyd
50-00-0

formaldehyd

C

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

D

carbon monoxide
201230-82-2

carbon monoxide

Conditions
ConditionsYield
With oxygen at 19.84℃; Flow reactor; Green chemistry;
1,3,5-Trioxan
110-88-3

1,3,5-Trioxan

formaldehyd
50-00-0

formaldehyd

A

bis-methoxymethoxy-methane
13353-03-2

bis-methoxymethoxy-methane

B

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

Conditions
ConditionsYield
With strong acidic styrene type cation exchange resin catalyst at 100℃; under 15001.5 Torr; for 3h; Temperature; Time; Overall yield = 43.26 %;
1,3,5-Trioxan
110-88-3

1,3,5-Trioxan

formaldehyd
50-00-0

formaldehyd

A

bis-methoxymethoxy-methane
13353-03-2

bis-methoxymethoxy-methane

B

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

C

POMM4
13352-75-5

POMM4

Conditions
ConditionsYield
With strong acidic styrene type cation exchange resin catalyst at 80 - 100℃; under 15001.5 Torr; for 3h; Temperature; Time; Overall yield = 47.55 %;
methanol
67-56-1

methanol

formaldehyd
50-00-0

formaldehyd

A

Dimethoxymethane
109-87-5

Dimethoxymethane

B

bis-methoxymethoxy-methane
13353-03-2

bis-methoxymethoxy-methane

C

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

Conditions
ConditionsYield
With C16H36NO3S(1+)*CH3O4S(1-) at 125 - 130℃; under 26252.6 - 30003 Torr; Reagent/catalyst; Inert atmosphere;
methanol
67-56-1

methanol

formaldehyd
50-00-0

formaldehyd

A

Dimethoxymethane
109-87-5

Dimethoxymethane

B

bis-methoxymethoxy-methane
13353-03-2

bis-methoxymethoxy-methane

C

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

D

POMM4
13352-75-5

POMM4

Conditions
ConditionsYield
With C16H36NO3S(1+)*CH3O4S(1-) at 125 - 130℃; under 26252.6 - 30003 Torr; Reagent/catalyst; Inert atmosphere;
methanol
67-56-1

methanol

formaldehyd
50-00-0

formaldehyd

A

Dimethoxymethane
109-87-5

Dimethoxymethane

B

bis-methoxymethoxy-methane
13353-03-2

bis-methoxymethoxy-methane

C

bis(methoxymethyl)ether
628-90-0

bis(methoxymethyl)ether

D

POMM4
13352-75-5

POMM4

E

POMM5
13352-76-6

POMM5

Conditions
ConditionsYield
With C16H36NO3S(1+)*CH3O4S(1-) In water at 125 - 130℃; under 26252.6 - 30003 Torr; Reagent/catalyst;

628-90-0Relevant articles and documents

Long term storage inducer

-

Paragraph 0068-0070, (2021/02/25)

PROBLEM TO BE SOLVED: To provide a long-term memory inducing agent.SOLUTION: A long-term memory inducing agent comprises a compound represented by the formula I, pharmaceutically acceptable salt thereof, or solvate thereof.SELECTED DRAWING: None

AQUEOUS COMPOSITION BASED ON POLYOXYMETHYLENE DIALKYL ETHERS (POM) AND THEIR USE FOR THE PRESERVATION AND/OR EMBALMING OF THE HUMAN OR ANIMAL BODY

-

Paragraph 0058-0059, (2020/11/24)

The invention relates to a composition comprising: a) a mixture of polyoxymethylene dialkyl ethers (POM) having a restricted specific molecular distributionb) at least one biocidal agentc) at least one pro-penetrating agentd) at least one dyee) optionally, another additiveand water as diluent. It also relates to a non-therapeutic method of preserving and/or embalming a dead human or animal body using the composition, such as the use of this composition for anatomopathological purposes.

Towards a Sustainable Synthesis of Oxymethylene Dimethyl Ether by Homogeneous Catalysis and Uptake of Molecular Formaldehyde

Peter, Andreas,Fehr, Samuel M.,Dybbert, Valentin,Himmel, Daniel,Lindner, Ines,Jacob, Eberhard,Ouda, Mohamed,Schaadt, Achim,White, Robin J.,Scherer, Harald,Krossing, Ingo

supporting information, p. 9461 - 9464 (2018/07/25)

Oxymethylene dimethyl ethers (OMEn; CH3(-OCH2-)nO-CH3, n=3–5) are a novel class of sustainable synthetic fuels, which are of increasing interest due to their soot-free combustion. Herein a novel anhyd

Three Binary Azeotropic Systems for 1-(Methoxymethoxy)-propane, 1-(Ethoxymethoxy)-propane, and Methoxy(methoxymethoxy)methane with Three Alcohols at 101.33 kPa: Experimental Data, Correlation, and Purification

Song, Yu-He,Hou, Xing-Ming,Song, Juan,Zhang, Yue,Wang, Jie,Wei, Ping-He,Li, Cun-Fu

, p. 138 - 146 (2018/01/18)

The isobaric vapor-liquid equilibrium (VLE) data for three binary systems of 1-(methoxymethoxy)-propane and ethanol, 1-(ethoxymethoxy)-propane and 1-butanol, methoxy(methoxymethoxy)methane and 1-propanol at 101.33 kPa were measured using an improved Rose still. Three minimum boiling azeotropes were found for three binary systems containing ethanol, 1-butanol, and 1-propanol for which the azeotropic temperature and composition are 349.35 K and 70.95 mol % (ethanol), 384.02 K and 36.02 mol % (1-butanol), 368.68 K and 69.26 mol % (1-propanol), at 101.33 kPa, respectively. The VLE measurements were correlated by the Van Laar, Wilson, and nonrandom two-liquid models, and the results showed that the measurements had a good correlation by using thethree models for the three binary systems, respectively. The measurements of these three binary systems were thermodynamic as checked by the Herington semiempirical method.

Preparation method of 2,4,6-trioxaheptane and device for preparation method thereof

-

Paragraph 0052-0055; 0058-0061; 0064-0067; 0070-0073, (2018/11/03)

The invention relates to the field of chemical industry, in particular to a preparation method of 2,4,6-trioxaheptane and a device for the preparation method thereof. The preparation method of the 2,4,6-trioxaheptane is characterized in that the 2,4,6-trioxaheptane is prepared by reacting formaldehyde with methanol to generate methylal and the 2,4,6-trioxaheptane and separating. According to the preparation method of the 2,4,6-trioxaheptane, provided by the invention, the 2,4,6-trioxaheptane is prepared by reacting the formaldehyde with the methanol; the preparation method has the advantages of more thorough reaction, high total yield, high product purity, small waste water pollution, safety, environmental friendliness and suitability for industrialized production.

Polyoxymethylene to dimethyl ether synthesis method of polyoxymethylene

-

Paragraph 0015; 0016; 0035; 0036, (2017/03/21)

The invention relates to a method for synthesizing polyoxymethylene dimethyl ether by using polyoxymethylene, and the method is mainly used for solving the problems of low reaction efficiency of the traditional catalyst and relatively high cost caused by taking trioxymethylene as a raw material. The problems are better solved according to the technical scheme that methanol, dimethoxymethane and polyoxymethylene are used as raw materials, wherein the mass ratio of methanol to dimethoxymethane to polyoxymethylene is (0-10):(0-10):1, the dosages of methanol and dimethoxymethane cannot be simultaneously equal to zero, the raw materials are in contact with a catalyst to react to generate polyoxymethylene dimethyl ether under the conditions that the reaction temperature is 70-200 DEG C and the reaction pressure is 0.2-6MPa, the dosage of the catalyst accounts for 0.05-10% of the weight of the raw materials, and the adopted catalyst comprises the following components in parts by weight: 30-80 parts of molecular sieve carriers (a) and 20-70 parts of rare earth modified solid super acid (b). The method can be used for industrial production of polyoxymethylene dimethyl ether.

By poly-formaldehyde systems poly formaldehyde method of dimethyl ether

-

Paragraph 0015-0016, (2017/02/09)

The invention relates to a method for preparing polyoxymethylene dimethyl ether from paraformaldehyde, and mainly solves the problem in the prior art that the cost is relative high when triformol is adopted as a raw material to synthesize polyoxymethylene dimethyl ether. According to the invention, methanol, dimethoxymethane, and paraformaldehyde are adopted as raw materials, wherein the mass ratio of methanol : dimethoxymethane : paraformaldehyde is (0-10) : (0-10) : 1, wherein the quantities of methanol and dimethoxymethane cannot both be 0; the catalyst is chosen from at least one component of the following tombarthite modified solid superacid: SO4/ZrO2-La2O3, SO4/ZrO2-Ce2O3, Cl/TiO2-La2O3, Cl/TiO2-Ce2O3, Cl/Fe2O3-Ce2O3, SO4/Al2O3-La2O3 or S2O8/ZrO2-La2O3. The technical scheme excellently solves the problem, and can be applied to the industrial production of polyoxymethylene dimethyl ether.

Synthesis of polyoxymethylene dimethyl ethers catalyzed by rare earth compounds

Shi, Gao-Feng,Miao, Jian,Wang, Guo-Ying,Su, Jin-Mei,Liu, Hai-Xiao

, p. 2149 - 2153 (2015/11/28)

Polyoxymethylene dimethyl ethers (PODMEn) have been synthesized in moderate yields by the reaction of methylal (PODME1) and paraformaldehyde catalyzed by rare earth compounds. The activities of catalyst in the reaction were investigated and the

Shape selectivity extending to ordered supermicroporous aluminosilicates

Fu, Wen Hua,Liang, Xiao Min,Zhang, Haidong,Wang, Yi Meng,He, Ming Yuan

supporting information, p. 1449 - 1452 (2015/08/03)

In the synthesis of polyoxymethylene dimethyl ethers (PODEn) catalyzed by ordered supermicroporous aluminosilicates, shape selectivity was observed and the high selectivity for target products (PODE3-8) was attributed to the particul

REACTION SYSTEM AND PROCESS FOR PREPARING POLYMETHOXY DIMETHYL ETHER

-

Paragraph 0105-0108, (2015/04/15)

The invention relates to a reaction system and process for continuously preparing polymethoxy dimethyl ether (DMM3-8) by a continuous acetalization reaction between an aqueous formaldehyde solution or paraformaldehyde and methanol in the presen

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