112-48-1Relevant academic research and scientific papers
METHOD FOR PREPARING DOUBLE-SEALED-END GLYCOL ETHER
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Paragraph 0030; 0037, (2017/12/27)
Disclosed is a method for preparing a double end capped glycol ether, the method comprising: introducing into a reactor a raw material comprising a glycol monoether and a monohydric alcohol ether, and enabling the raw material to contact and react with an acidic molecular sieve catalyst to generate a double end capped glycol ether, a reaction temperature being 50-300° C., a reaction pressure being 0.1-15 MPa, a WHSV of the glycol monoether in the raw material being 0.01-15.0 h?1, and a mole ratio of the monohydric alcohol ether to the glycol monoether in the raw material being 1-100:1. The method of the present invention enables a long single-pass lifespan of the catalyst and repeated regeneration, has a high yield and selectivity of a target product, low energy consumption during separation of the product, a high economic value of a by-product, and is flexible in production scale and application.
Preparation method for double-terminated glycol ether
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Paragraph 0049; 0062; 0063, (2017/07/25)
The invention relates to a preparation method for double-terminated glycol ether. The preparation method comprises a step of introducing raw materials containing glycol monoether and monohydric ether alcohol into a reactor for contact and reaction with an acidic molecular sieve catalyst so as to produce double-terminated glycol ether, wherein reaction temperature is 50 to 300 DEG C, reaction pressure is 0.1 to 15 MPa, the mass space velocity of the glycol monoether in the raw materials is 0.01 to 15.0/h, and a mol ratio of monohydric ether alcohol to glycol monoether in the raw materials is 1-100: 1. The preparation method has the advantages that the catalyst has long single-pass life and can be repeatedly regenerated; the target product, i.e., double-terminated glycol ether has high yield and selectivity; energy consumption in separation of products is low; by-products have high economic value; production scale can be large or small; and application of the method is flexible.
PRODUCTION OF HYDROXY ETHER HYDROCARBONS BY VAPOR PHASE HYDROGENOLYSIS OF CYCLIC ACETALS AND KETALS
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Page/Page column 11, (2013/02/28)
A vapor phase hydrogenolysis reaction to convert cyclic acetal compounds and/or cyclic ketal compounds in the presence of hydrogen to their corresponding hydroxy ether hydrocarbon reaction products using a supported noble metal catalyst. The hydrogenolysis reaction can be carried out in the vapor phase and in the absence of a polyhydroxyl hydrocarbon co-solvent.
CATALYSTS FOR THE PRODUCTION OF HYDROXY ETHER HYDROCARBONS BY VAPOR PHASE HYDROGENOLYSIS OF CYCLIC ACETALS AND KETALS
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Page/Page column 18, (2013/02/28)
Catalyst compositions of palladium supported on alumina or zirconium oxide supports having low or no silicon dioxide contents and having a specific surface area or modified with alkali, alkaline earth, or phosphine oxide compounds are selective in a vapor phase hydrogenolysis reaction to convert cyclic acetal compounds and/or cyclic ketal compounds in the presence of hydrogen to their corresponding hydroxy ether hydrocarbon reaction products.
NICKEL MODIFIED CATALYST FOR THE PRODUCTION OF HYDROXY ETHER HYDROCARBONS BY VAPOR PHASE HYDROGENOLYSIS OF CYCLIC ACETALS AND KETALS
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Page/Page column 8, (2013/02/28)
Catalyst compositions of alumina supports containing palladium and nickel are selective in a vapor phase hydrogenolysis reaction to convert cyclic acetal compounds and/or cyclic ketal compounds in the presence of hydrogen to their corresponding hydroxy ether hydrocarbon reaction products.
PRODUCTION OF HYDROXY ETHER HYDROCARBONS BY LIQUID PHASE HYDROGENOLYSIS OF CYCLIC ACETALS OR CYCLIC KETALS
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Page/Page column 10-11, (2013/02/28)
A liquid phase hydrogenolysis of acetal compounds such as cyclic acetals and cyclic ketals are fed to a reaction zone and reacted in the presence of a noble metal catalyst supported on a carbon or silica support to make hydroxy ether mono-hydrocarbons in high selectivity, without the necessity to use acidic co-catalysts such as phosphorus containing acids or stabilizers such as hydroquinone.
POLYOL ETHERS AND PROCESS FOR MAKING THEM
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Paragraph 0066, (2011/05/14)
New polyol ether compounds and a process for their preparation. The process comprises reacting a polyol, a carbonyl compound, and hydrogen in the presence of hydrogenation catalyst, to provide the polyol ether. The molar ratio of polyol to carbonyl compound in the process is greater than 5:1.
POLYOL ETHERS AND PROCESS FOR MAKING THEM
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Page/Page column 6-7, (2010/03/31)
New polyol ether compounds and a process for their preparation. The process comprises reacting a polyol, a carbonyl compound, and hydrogen in the presence of hydrogenation catalyst, to provide the polyol ether. The molar ratio of polyol to carbonyl compound in the process is greater than 5:1.
Reaction of Hemiacetal Esters, Acetals, and Acylals with Alcohols or Acetic Acid
Gallucci, R. R.,Going, R. C.
, p. 3517 - 3521 (2007/10/02)
Hemiacetal esters undergo rapid exchange with alcohols at room temperature to give mixtures of hemiacetal ester and acetal.The equilibration requires acid catalysis, and equilibrium lies far in favor of the acetal (>95percent).Acetals undergo exchange with carboxylic acids to give the same equilibrium mixtures as that achieved by using the corresponding hemiacetal ester and alcohol.The use of a large excess of carboxylic acid can convert acetals to hemiacetal esters.Under more vigorous conditions, both acetals and hemiacetal esters react with acetic acid to form acetates.The reaction of hemiacetal esters or acetals with anhydrous hydrogen chloride yields α-chloro ethers.The thermolysis of hemiacetal esters is also examined.Acylals do not undergo substitution as observed for acetals and hemiacetal esters.The reaction of acylals with alcohols results in ester formation with no exchange.Under acid conditions, hemiacetal esters are more reactive than either acetals or acylals.
