Abstract: A vinyl acetate-ethylene (VAE) copolymer and uses of the same are provided. The vinyl acetate-ethylene (VAE) copolymer includes a structural unit derived from ethylene and a structural unit derived from vinyl acetate. The 1H-NMR spectrum of the vinyl acetate-ethylene (VAE) copolymer has an integral value B of signals from 0.5 ppm to 1.0 ppm and an integral value A of signals from 4.6 ppm to 5.0 ppm, and the value of B/3A ranges from 0.070 to 0.120. The 1H-NMR spectrum is measured by using dimethyl sulfoxide as a solvent.

Abstract: The present disclosure provides a method for producing tetrahydrofuran (THF). The method includes: feeding 1,4-butanediol into a reactive distillation apparatus; performing the dehydration reaction in the presence of an acidic catalyst; and producing the top stream containing product THF and the bottom stream from the reactive distillation apparatus, wherein a weight ratio of a water content in the bottom stream to a water content in the top stream is 0.05 to 2.4, thereby providing a high conversion rate and more cost-effectiveness, and enhancing the value of the industrial application.

Abstract: The present disclosure provides an Escherichia coli transformant and a method for producing itaconate using the Escherichia coli transformant.

Abstract: The present disclosure provides a method for producing tetrahydrofuran (THF). The method includes: feeding 1,4-butanediol into a reactive distillation apparatus; performing the dehydration reaction in the presence of an acidic catalyst; and producing the top stream containing product THF and the bottom stream from the reactive distillation apparatus, wherein a weight ratio of a water content in the bottom stream to a water content in the top stream is 0.05 to 2.4, thereby providing a high conversion rate and more cost-effectiveness, and enhancing the value of the industrial application.

Abstract: A polycarbonate diol is provided, including three kinds of repeating diol units, wherein one of the repeating diol units is chosen from an alkoxylated diol monomer.

Abstract: This disclosure relates to silicon modified vinyl acetate ethylene copolymers and to emulsions and articles of manufacture based on the same.

Abstract: The invention provides a polymer comprising at least one vinyl ester; and at least one acrylic ester of a branched alcohol, wherein the branched alcohol is a branched C16-C32 alcohol. The invention also provides compositions comprising these polymers.

Abstract: Compositions containing Tricyclodecane Dimethanol (TCCDM) and at least a second component, wherein the composition is characterized in a gas chromatography (GC) analysis, wherein the TCDDM is eluted at a retention time ranging from 12.4 minutes to 13 minutes, the second component is eluted at a retention time ranging from 11.8 minutes to 12.4 minutes, and the ratio of the area of elution peaks indicating the second component compared to the area of the elution peaks of the TCCDM is between 0.001:1 and 0.04:1. Useful products of the composition include polymers and optical materials.

Abstract: The present invention relates generally to methods and systems for removing oxygen from at least one product stream of a hydrocarbon oxidative dehydrogenation process. More specifically, in some embodiments, the oxidative dehydrogenation process is an ethane oxidative dehydrogenation process for producing ethylene, or a mixed alkane oxidative dehydrogenation process for producing ethylene and propylene, among other components.

Abstract: The invention relates to an extraction process for the recovery of high-boiling aldehyde products and catalysts from a hydroformylation product solution.

Abstract: The present invention relates generally to methods and systems for removing oxygen from at least one product stream of a hydrocarbon oxidative dehydrogenation process. More specifically, in some embodiments, the oxidative dehydrogenation process is an ethane oxidative dehydrogenation process for producing ethylene, or a mixed alkane oxidative dehydrogenation process for producing ethylene and propylene, among other components.

Abstract: The invention provides a polymer comprising at least one vinyl ester; and at least one acrylic ester of a branched alcohol, wherein the branched alcohol is a branched C16-C32 alcohol. The invention also provides compositions comprising these polymers.

Abstract: A polycarbonate diol is provided, including three kinds of repeating diol units, wherein one of the repeating diol units is chosen from an alkoxylated diol monomer.

Abstract: The present invention relates generally to methods and systems for removing oxygen from at least one product stream of a hydrocarbon oxidative dehydrogenation process. More specifically, in some embodiments, the oxidative dehydrogenation process is an ethane oxidative dehydrogenation process for producing ethylene.

Abstract: A polycarbonate diol is provided, including three kinds of repeating diol units, wherein one of the repeating diol units is chosen from an alkoxylated diol monomer.

Abstract: A method for producing allyl alcohol is disclosed. The method includes steps of feeding allyl acetate and water into a reactive distillation column; performing a reaction in a reaction zone and separating a product containing allyl alcohol, acetic acid and water from the reactive distillation column. Accordingly, the method effectively enhances a conversion rate of hydrolysis for allyl acetate, simplifies the process and reduces energy consumption.

Abstract: A method for producing allyl alcohol is disclosed. The method includes steps of feeding allyl acetate and water into a reactive distillation column; performing a reaction in a reaction zone and separating a product containing allyl alcohol, acetic acid and water from the reactive distillation column. Accordingly, the method effectively enhances a conversion rate of hydrolysis for allyl acetate, simplifies the process and reduces energy consumption.

Abstract: This invention relates to a catalyst which comprises palladium metal as the main catalyst, tin metal or a mixture of tin and additional metals as the promoter, in combination with an alkali or alkaline earth metal compound, supported on the outer surface of a porous carrier. The catalyst is used in the process for producing allyl acetate through the oxacylation of propylene, acetic acid and oxygen in a vapor phase. The catalyst of the present invention exhibits high catalytic activity, high catalytic selectivity and high catalytic life, which greatly increases the economic utility of the oxacylation process.

Abstract: Disclosed are a modified polyester fiber and a process for producing the same. The modified polyester fiber comprises the component of alkoxylated 2-methyl-1,3-propanediol and has the properties of easy dyeability at low temperatures and good colorfastness to laundering. The modified polyester fiber can be produced by undergoing a polymerization reaction of alkoxylated 2-methyl-1,3-propanediol, alkanediol, and terephthalic acid or an alkyl ester thereof, and then spinning. The modified polyester fiber can be dyed at low temperature and has excellent dyeability and colorfastness to laundering. Therefore, this modified polyester fiber can be widely used in the application of synthetic fiber product.

Abstract: This invention relates to a catalyst which comprises palladium metal as the main catalyst, tin metal or a mixture of tin and additional metals as the promoter, in combination with an alkali or alkaline earth metal compound, supported on the outer surface of a porous carrier. The catalyst is used in the process for producing allyl acetate through the oxacylation of propylene, acetic acid and oxygen in a vapor phase. The catalyst of the present invention exhibits high catalytic activity, high catalytic selectivity and high catalytic life, which greatly increases the economic utility of the oxacylation process.