Polyhydroxyl alcohols

Preparation of carotenoid extract from plant oleoresin and hydrolysis with alkahne reagent in polar organic solvents (ether, polyhydroxyl alcohol, and ether alcohol)... 

Since cellulose is a polyhydroxyl alcohol, it can undergo esterification and etherification modifications. The properties of the derivatives depend heavily on the... 

Because it is a polyhydroxyl alcohol, cellulose can be esterified in strong acid mediums, anhydrides, and catalysts, and requires the absence of water for completion because it is a reversible reaction. Normally, the reaction proceeds rapidly and is permitted to continue until the three hydroxyl groups on each anhydroglucose unit have been replaced with the acyl group of the organic acid or mixture of acids. 

Polymer network solutions can also be formed from aqueous chemical systems. Aqueous metal chelates that have at least one additional carboxyl group as a reaction site can undergo polyesterification with a polyhydroxyl alcohol to form a network [39,40]. Aqueous metal ions can also react with polyaaylic acid and be precipitated as a crosslinked polymer [41]. The poljnnerization mechanism and its rate are important factors in determining the molecular weight of the pol5maers and the density distribution of the microstructure formed. 

The relationship between the hydroxyl groups of a polyhydroxylic alcohol can confer special properties on these compounds. In particular, there... 

Use Plasticizer and coalescing agent for acrylic latexes in floorpolishes, solvent for polymers, insecticides, polyhydroxylic alcohols, sugar, iodine, specialty inks, monomer for nylon-4. 

Of the numerous possibilities arising from the esterification of polycarboxylic acids by polyhydroxylic alcohols, fortunately only a few need be considered seriously from the viewpoint of utility as synthetic ester lubricants. Most of the esters that find application as lubricant fluids are products of the reaction of monohydroxylic alcohols and dicar-boxylic acids for example, the simple type structure shown below ... 

The synthesis and analysis of carbohydrate phosphates have been collated, and phosphodiesters formed between 2-aminoethanol and polyhydroxylated alcohols or sugars have been synthesized using acetoin enediol pyrophosphate... 

The calcium formate belongs also to the hardening accelerators [79]. This admixture is available as a waste in the production of pentaeritrite (polyhydroxyl alcohol). However, the effect of formate is less pronounced than the effect of chloride (Fig. 4.30). 

Chem. Descrip. 2-Pyrrolidone CAS 616-45-5 EINECS/ELINCS 204-648-7 Uses Monomer for polypyrrolidone solvent for polymers, insecticides, polyhydroxylic alcohols, sugars, iodine, specialty inks used in petrol, processing and acrylonitrile mfg. solvenL solubilizer, intermediate for pharmaceuticals plasticizer/coalescing agent for actylic latexes, actylic-styrene copolymers in emulsion-type floor coalings intermediate for N-methylol derivs., alkaloids related to peganine, amino-butyric acid derivs. adhesives... 

Strongly polar. These may include amino alcohols, hydroxyl acids, polyhydroxyl alcohols, polyprotic acids, polyphenols, thiols, and molecules containing nitrogen, oxygen, phosphorus, sulfur, or halogen atoms. 

DPP was initially developed for the preparation of thin films and was lafer adapted for the preparation of materials in the powder form. DPP consists of dissolving mefal salts in the presence of a hydroxyl acid (cifric acid) and a polyhydroxylic alcohol (ethylene glycol), to obtain a solution with good metal distribution consisting of a resin of the precursor metal. To obtain the catalyst, each metal is stoichiometrically mixed with carbon Vulcan XC-72 or any other support and fired at high temperatures e.g., 300°C-400°C. The major advantage of this route is the attainment of robusf catalysfs wifh experimental composition close to the nominal one. This method has been employed in the synthesis of a series of PtSn/C materials [19-21,27]. Nevertheless, proper control of particle morphology and metal distribution must be improved, in order to obtain better catalytic activity for ethanol electro-oxidation, which is currently under 1.0 A Spt ... 

Shkrob lA, Sauer MC, Gosztola D (2004) Efficient, rapid photooxidation of chemisrahed polyhydroxyl alcohols and carbohydrates by Ti02 nanoparticles in an aqueous solution. J Phys Chem B 108(33) 12512-12517... 

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