5660-53-7

Usage

InChI:InChI=1/C9H18O3/c1-7(2)4-9(3)11-6-8(5-10)12-9/h7-8,10H,4-6H2,1-3H3

Upstream product

• 108-10-1 4-methyl-2-pentanone 
• 56-81-5 glycerol 
• 16343-23-0 1,2-(iso-butylethylidene)-3-trimethylsilylglycerol 

Downstream Products

• 108-10-1 4-methyl-2-pentanone 
• 56-81-5 glycerol 

Relevant academic research and scientific papers

Structure–Activity Relationships of WOx-Promoted TiO2–ZrO2 Solid Acid Catalyst for Acetalization and Ketalization of Glycerol towards Biofuel Additives

Abstract: WOx-promoted TiO2–ZrO2 solid acid catalyst was prepared and applied in the catalytic acetalization and ketalization of glycerol with carbonyl compounds to produce biofuel additives. The presence of WOx promoter and TiO2 remarkably improved the catalytic activity of ZrO2. Approximately, 100% glycerol conversion was evidenced with non-bulky aliphatic aldehydes and ketones like, propanol and cyclohexanone. The physical characterization of WOx-promoted TiO2–ZrO2, revealed a higher formation of tetragonal crystalline phase of ZrO2, over monoclinic. The total surface acidity and the ratio of Br?nsted to Lewis acidic site concentrations were determined by NH3-TPD and pyridine-chemisorbed FTIR spectroscopy, respectively. A considerably higher concentration of Lewis acidic sites, ~ 213.29?μmol/gm, was evidenced on the WOx-promoted TiO2–ZrO2 catalyst surface. Catalytic activity study revealed a direct correlation between the surface Lewis acidic site concentration and the activity of catalyst. This significant observation indicated the key role of Lewis acidic sites in this catalytic process. The WOx-promoted TiO2–ZrO2 catalyst was also considerably stable and showed good performance in the acetalization/ketalization of glycerol with other substituted carbonyl compounds. Graphic Abstract: The WOx-promoted TiO2–ZrO2 solid acid catalyst exhibits superior catalytic performance for acetalization and ketalization of glycerol with carbonyl compounds to produce biofuel additives. [Figure not available: see fulltext.].

Method for preparing 2-methyl-2-isobutyl-4-hydroxymethyl-1,3-dioxolame

The invention discloses a method for preparing 2-methyl-2-isobutyl-4-hydroxymethyl-1,3-dioxolame. Methyl isobutyl ketone and glycerinum are taken as raw materials. The method is characterized by including the following steps: adopting an activated carbon immobilized sulfuric acid catalyst for performing fixed bed continuous condensation reaction under reaction temperature of 90-115 DEG C; removingwater generated from the reaction by azeotropic distillation; rectifying reaction products after dewatering; removing and recycling excessive unreacted MIBK, thereby obtaining the 2-methyl-2-isobutyl-4-hydroxymethyl-1,3-dioxolame. According to the method provided by the invention, the continuous production of the 2-methyl-2-isobutyl-4-hydroxymethyl-1,3-dioxolame can be realized; operation is simple; production efficiency of the 2-methyl-2-isobutyl-4-hydroxymethyl-1,3-dioxolame is obviously increased; production cost is lowered; solid pollutants and wastewater discharge can be reduced; large-scale industrial application value is ultrahigh.

Solvent-free heteropolyacid-catalyzed glycerol ketalization at room temperature

Currently, glycerol has been produced in large amounts as a biodiesel co-product. Therefore, developing processes to convert it into more valuable chemicals has attracted significant attention. Glycerol ketals are compounds useful as synthesis intermediates, fragrance ingredients, and mainly bioadditives for diesel and gasoline, and have been produced from reactions catalyzed by mineral acids. In this work, we assessed the activity of H3PW12O40 heteropolyacid on glycerol ketalization with different ketones at room temperature and in the absence of an auxiliary solvent. The effects of the principal reaction parameters such as the reactant stoichiometry, catalyst concentration, reaction temperature, and type of carbonylic reactant were investigated. H3PW12O40 heteropolyacid was much more active than other Br?nsted acid catalysts evaluated (i.e. H2SO4, p-toluenesulfonic acid, H3PMo12O40 or H4SiW12O40) and exhibited high selectivity toward five-membered (1,3-dioxolane) cyclic ketals. Although homogeneous, the heteropolyacid catalyst could be recovered and reused without a loss of activity.

PURIFICATION OF CRUDE GLYCEROL

Crude glycerol obtained from raw materials, such as the glycerol obtained during the production of biodiesel or glycerol obtained during the conversion of fats or oils, is purified by forming a dioxolane therefrom by reacting the crude glycerol with a ketone or aldehyde, separating the dioxolane thus formed, converting the dioxolane into purified glycerol and ketone/aldehyde, and recovering the glycerol thus purified.

Selective cleavage of ethers using silica-alumina gel catalysts prepared by the sol-gel method

The selective cleavage of tetrahydropyranyl (THP), methoxymethyl (MOM), 1-ethoxyethyl (EE), 1-methyl-1-methoxyethyl (MME) and trimethylsilyl (TMS) ether groups with silica-alumina gels prepared by the sol-gel method has been investigated. The deprotection rate follows the order: TMS > MME >>, EE > THP >> MOM. The selective deprotection of diol derivatives with mixed protecting groups was achieved efficiently. Bis-THP and bis-MOM ether derivatives of a substrate which contained a primary and a tertiary hydroxyl groups were mono- deprotected with moderate selectivity. The selective deprotection of glycerol ethers was also examined. The silica-alumina gels prepared by the sol-gel method are thus shown to be a good catalyst for selective cleavage of ether protecting groups giving the product in a simple manner under mild conditions.

Glycerin derivatives and process for producing the same

Glycerine derivatives represented by formula (1A), (2A) and (3A): wherein R1a, R2a, R1b, R2b, R1c, and R2care as defined in the disclosure, and process for producing glycerin derivatives, including the glycerin derivatives (1A), (2A) and (3A), are disclosed. The glycerin derivatives have satisfactory physical properties and are applicable as lubricants or polar oils and also have mutual effects with water and are applicable as emulsifying agents or moisture retaining agents. The process makes it possible to synthesize glycerin derivatives from easily and economically available aldehydes or ketones in high yields.

Polyol derivatives, processes for preparing the same and their uses in therapeutics

Mono-, di-, tri- and tetra-esters derived from an acid of the general formula: in which R represents an acyl radical of the general formula: STR1 in which n represents 0 or 1, m represents 0, 1, 2, 3 or 4, R1 and R2 each represent a straight- or branched-chain alkyl radical having from 1 to 5 carbon atoms, R3 represents hydrogen or a straight- or branched-chain alkyl radical having from 1 to 5 carbon atoms, the sum of the carbon atoms in R1 and R2 being from 4 to 10 when R3 represents hydrogen and the sum of the carbon atoms in R1, R2 and R3 being from 6 to 15 when R3 is different from hydrogen, or R1 and R2 when they are taken together represent a tetramethylene, pentamethylene or hexamethylene radical and R3 represents a straight-chain alkyl radical and an alcohol selected from the group consisting of glycerol, 2,3-epoxy-propanol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 1,2,3-butanetriol, 1,2,4-butanetriol, 1,2,3,4-butanetetrol, 2-buten-1,4-diol, 2-butyn-1,4-diol, diethyleneglycol, a cyclohexanediol preferably 1,2-cyclohexanediol, thiodiglycol, diethanolamine, N-R-substituted-diethanolamine, trimethylolpropane, pentaerythritol and an alcohol of the general formula: STR2 in which p represents 0 or 1, R4 represents methyl, R5 represents methyl, ethyl, 2-methyl-butyl or R4 and R5, when they are taken together represent a pentamethylene radical, with the exception of glyceryl tri-(di-n-propylacetate). These esters are useful in the treatment of central nervous system disorders and including, in particular, convulsive states and seizures, and disorders relating to the field of neuropsychiatry.