Topic
Aldose
About: Aldose is a research topic. Over the lifetime, 1270 publications have been published within this topic receiving 27197 citations. The topic is also known as: aldoses.
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20 Mar 2018
TL;DR: In this paper, a continuous method for converting carbohydrates to ethylene and propylene glycol was proposed, where the carbohydrates are mixed with water and passed through a reactor at a temperature of hydrolyzing the carbohydrate mixture at least partially to monosaccharides, the reactor having a first zone A comprising a retro-aldol catalyst and a second zone B comprising a reducing catalyst.
Abstract: PROBLEM TO BE SOLVED: To provide a cost-effective method to produce ethylene glycol from renewable resources.SOLUTION: This invention relates to a continuous method for converting carbohydrates to ethylene and propylene glycol, wherein: the carbohydrates are mixed with water and passed through a reactor at a temperature of hydrolyzing the carbohydrate mixture at least partially to monosaccharides, the reactor having a first zone A comprising a retro-aldol catalyst and a second zone B comprising a reducing catalyst; the aldose is converted in the first zone into glycolaldehyde by the retro-aldol catalyst; in the presence of hydrogen, the glycolaldehyde is converted to ethylene glycol in the second zone of the reactor; the reaction products are removed from the reactor; and the ethylene glycol is recovered.SELECTED DRAWING: Figure 1
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22 Mar 2011
TL;DR: In this article, a method for quantifying the total phosphorus of inspection water by decomposing a phosphorus compound contained in the inspection water to be converted into phosphate ions and quantitating the phosphate ions of the inspected water, was presented.
Abstract: PROBLEM TO BE SOLVED: To safely quantitate total phosphorus of inspection water in short time.SOLUTION: In the method for quantitating the total phosphorus of the inspection water by decomposing a phosphorus compound contained in the inspection water to be converted into phosphate ions and quantitating the phosphate ions of the inspection water, alkali metal salt of peroxodisulfate and sulfuric acid are added to the inspection water, and heated for predetermined time at temperature from 65°C to boiling temperature. Then, a coloring agent containing at least one hydroxyl group-containing compound selected from a hydroxyl group-containing compound consisting of hydroxycarboxylic acids and alditol, a saccharide compound selected from a saccharide compound group consisting of aldose of carbon number 5, aldose of carbon number 6, ketose of carbon number 6 and a monosaccharide generation compound capable of generating one of the monosaccharides by decomposition and hexaammonium heptamolybdate is added to the inspection water to be heated for predetermined time at 65°C or higher, and after that, absorbance of arbitrary wavelength within a range from 600 to 950 nm is measured for the inspection water.
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18 Mar 1981
TL;DR: Ketose sugars (for example, lactose, glucose or galactose) are produced in high yield from aldose sugars by reaction with boric acid in aqueous medium in the presence of a tertiary or quaternary amine.
Abstract: Ketose sugars (for example, lactose, glucose or galactose) are produced in high yield from aldose sugars by reaction with boric acid in aqueous medium in the presence of a tertiary or quaternary amine.
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TL;DR: In this paper, a series of novel 2-thioxoimidazolidine glycosides were prepared via reaction of the key intermediate 2-(benzylsulfanyl)-5-[4-(3-hydroxypropoxy)-3-(methoxybenzinylidene)]-3-phenyl-1H-IMidazol-4-one with different sugar aldose or sugar hydrazones.
Abstract: A series of novel 2-thioxoimidazolidine glycosides were prepared via reaction of the key intermediate 2-(benzylsulfanyl)-5-[4-(3-hydroxypropoxy)-3-(methoxybenzylidene)]-3-phenyl-1H-imidazol-4-one with different sugar aldose or sugar hydrazones to give the corresponding glycosides. The newly synthesized compounds were confirmed by physical and spectral data.