Category: esters-buliding-blocks

Jung, Jong-Min published the artcileSynthesis of fatty acid methyl esters via non-catalytic transesterification of avocado oil with dimethyl carbonate, Category: esters-buliding-blocks, the main research area is fatty acid methyl ester transesterification avocado oil dimethyl carbonate.

This paper is primarily a case study on transesterification of avocado oil for the synthesis of biodiesel. Many operational parameters and components were studied in an attempt to identify the optimal process for non-catalytic transesterification, and di-Me carbonate (DMC), an acyl acceptor was identified as key to one very efficient methodol. Non-catalytic transesterification experiments using DMC and/or methanol (MeOH) were conducted under varied temperatures and varied amounts of silica loading. The maximum yield of fatty acid Me esters (FAMEs) of 92.96% was shown to be achievable at 380 °C. The miscibility of avocado oil and DMC was seen to be a key factor in providing a strategic means for delaying thermal cracking of FAMEs. Lastly, this study reported that the optimal mass ratio of silica to oil was over 8 at 380 °C.

Energy Conversion and Management published new progress about Avocado oil Role: RCT (Reactant), RACT (Reactant or Reagent). 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Abdulagatov, Ilmutdin M. published the artcileIsochoric heat capacity, phase transition and derived key thermodynamic properties of methyl decanoate, Formula: C11H22O2, the main research area is methyl decanoate isochoric heat capacity phase transition thermodn property.

In the present work single – and two-phase isochoric heat capacity (CV) and liquids-gas phase transition temperature (TS) and d. (ρS) of Me decanoate as component of biodiesel derived from coconut oil or babassu oil have been studied. The 15 liquid and vapor isochores between (152 and 834) kg·m-3 at temperatures from (300 to 463) K and at pressures up to 16 MPa were determined using high-temperature and high-pressure nearly constant-volume adiabatic calorimeter. For each exptl. isochores the measurements were conducted in the two-phase region in the immediate vicinity of the phase-transition temperatures (TS) to precisely determine the phase boundary d., one-phase and two-phase isochoric heat capacities (ρS,CV1, and CV2) using isochoric heat -capacity discontinuity behavior technique. For ten liquid isochores, the TSwas exptl. determined usingCVdiscontinuity method (irregular behavior of CV). For vapor (152.09 and 204.55) kg·m-3 and near-critical (235.13 and 300.83) kg·m-3 isochores we have never reached isochoric heat-capacity discontinuity temperatures TSdue to thermal decomposition of the Me decanoate at high temperatures (above 473 K). The measured CV2 as a function of sp. volume (V) along the various isotherms (below 473 K) were used to accurately estimate the values of the second temperature derivatives of chem. potential and vapor-pressure using theor. based Yang-Yang relation. The contributions of the vapor-pressure and the chem. potential to the measured total two-phase CV2 of Me decanoate were estimated The measured CV2ρS, and TS were used for determination many key thermodn. properties of Me decanoate along the saturation curve as well as the critical property data (TC=669.5 ± 5 K andρC = 287 ± 5 kg·m-3).

Fuel published new progress about Babassu oil Role: NUU (Other Use, Unclassified), USES (Uses). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Formula: C11H22O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Balachandran, S. published the artcileEnhancement of aqueous solubility and extraction of lauric acid using hydrotropes and its interaction studies by COSMO-RS model, Related Products of esters-buliding-blocks, the main research area is enhancement aqueous solubility extraction lauric acid hydrotrope.

In this study, conductor like screening model for real solvents was used to analyze the ability of hydrogen bond donor, hydrogen bond acceptor and electron affinity of all the studied species such as water, lauric acid (LA), sodium benzoate (SB), sodium salicylate (SS), nicotinamide (NI), and urea (UA). Further, the different hydrotropes solutions were prepared with different concentrations (0-3.0 mol/L) in order to analyze the solubility of lauric acid at different temperatures (303-313 K). Subsequently, hydrotropes based extraction of lauric acid from cold press coconut oil (CPCO) and com.-grade edible coconut oil (CGECO) was conducted at 313 K and 0.1 MPa. GC-MS anal. has been carried out on cold press coconut oil, com. grade edible coconut oil and hydrotropically extracted samples to characterize the different fatty acid compounds present in it. It was observed that the sodium benzoate hydrotrope solution extracted samples has lauric acid as a significant component in the GC-MS spectra when compared to the extracted samples of sodium salicylate hydrotrope solution

Journal of Dispersion Science and Technology published new progress about Coconut oil Role: NUU (Other Use, Unclassified), USES (Uses). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Related Products of esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Balachandran, S. published the artcileEnhancement of aqueous solubility and extraction of lauric acid using hydrotropes and its interaction studies by COSMO-RS model, Category: esters-buliding-blocks, the main research area is enhancement aqueous solubility extraction lauric acid hydrotrope.

In this study, conductor like screening model for real solvents was used to analyze the ability of hydrogen bond donor, hydrogen bond acceptor and electron affinity of all the studied species such as water, lauric acid (LA), sodium benzoate (SB), sodium salicylate (SS), nicotinamide (NI), and urea (UA). Further, the different hydrotropes solutions were prepared with different concentrations (0-3.0 mol/L) in order to analyze the solubility of lauric acid at different temperatures (303-313 K). Subsequently, hydrotropes based extraction of lauric acid from cold press coconut oil (CPCO) and com.-grade edible coconut oil (CGECO) was conducted at 313 K and 0.1 MPa. GC-MS anal. has been carried out on cold press coconut oil, com. grade edible coconut oil and hydrotropically extracted samples to characterize the different fatty acid compounds present in it. It was observed that the sodium benzoate hydrotrope solution extracted samples has lauric acid as a significant component in the GC-MS spectra when compared to the extracted samples of sodium salicylate hydrotrope solution

Journal of Dispersion Science and Technology published new progress about Coconut oil Role: NUU (Other Use, Unclassified), USES (Uses). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Sun, Kai published the artcileImportance of the synergistic effects between cobalt sulfate and tetrahydrofuran for selective production of 5-hydroxymethylfurfural from carbohydrates, Name: Ethyl 4-oxopentanoate, the main research area is cobalt sulfate THF carbohydrate hydroxymethylfurfural.

In this study, an effective catalytic system (CoSO4·7H2O/THF) for selective conversion of fructose to 5-hydroxymethylfurfural (HMF; yield: 88%) was developed. The synergistic effects among Co2+, SO42-, crystal water and THF (THF) were crucial for achieving selective dehydration of fructose to HMF. Co2+ worked as a Lewis acid for catalyzing mainly dehydration of fructose to HMF but not the further decomposition of HMF to levulinic acid. THF could help to retain HMF while CoSO4 could coordinate with HMF, enhancing the thermal stability of HMF in THF. The crystal water in cobalt sulfate could help to coordinate with fructose, which facilitated the conversion of fructose via dehydration reactions. The CoSO4·7H2O/THF catalytic system could also catalyze the conversion of inulin and cellulose into HMF. The main advantages of the CoSO4·7H2O/THF catalytic system are the low cost, the easy recycling of the CoSO4·7H2O catalyst and the easy separation of HMF from volatile THF.

Catalysis Science & Technology published new progress about Esters Role: SPN (Synthetic Preparation), PREP (Preparation). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Name: Ethyl 4-oxopentanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Wu, Liqiang published the artcileSilica sulfuric acid: a versatile and reusable heterogeneous catalyst for the synthesis of N-acyl carbamates and oxazolidinones under solvent-free conditions, Category: esters-buliding-blocks, the main research area is silica sulfuric acid versatile reusable heterogeneous catalyst; synthesis acyl carbamate oxazolidinone solvent free condition.

Silica sulfuric acid catalyzes efficiently the reaction of carbamates and oxazolidinones with anhydrides under solvent-free conditions. All the reactions were done at room temperature and the N-acyl carbamates and oxazolidinones were obtained with high yields and purity via an easy work-up procedure. This method is attractive and is in a close agreement with green chem.

Bulletin of the Chemical Society of Ethiopia published new progress about Anhydrides Role: RCT (Reactant), RACT (Reactant or Reagent). 120157-98-4 belongs to class esters-buliding-blocks, name is tert-Butyl acetylcarbamate, and the molecular formula is C7H13NO3, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Xu, Liyun published the artcileFabrication of fluorine-free, comfortable and wearable superhydrophobic fabrics via capacitance coupled plasma with methyl side-chain lauryl methacrylate coatings, Recommanded Product: Dodecyl 2-methylacrylate, the main research area is wearable superhydrophobic fabric lauryl methacrylate coating.

Superhydrophobic fabrics show great potential for use in functional gear, military clothing, and other applications; however, the introduction of toxicity and degraded wearing comfort restrict their applications. In this work, superhydrophobic fabrics with excellent wearing comfort have been prepared by coating of fluorine-free lauryl methacrylate (LMA) and subsequent crosslinking via radio-frequency capacitance coupled plasma (CCP). The treated cotton fabric demonstrated excellent superhydrophobicity and excellent wearing comfort. Due to the reactions between cotton and LMA and the crosslinking of LMA under plasma treatment, the LMA-coated cotton (cotton-g-LMA) fabric is durable enough to resist phys. rubbing (1500 cycles), washing (45 cycles), UV radiation ageing (48 h) and boiling water ageing (10 h). More importantly, the plasma treatment exerted little influence on the comfort of the cotton fabrics. Addnl., this method could be applied to various cellulose fabrics, e.g., cotton, ramie and viscose materials. The facile and scalable method presented here paves the way for the design of fluorine-free, comfortable and wearable superhydrophobic fabrics.

Progress in Organic Coatings published new progress about Cotton textiles (plasma treated, grafted with PLMA or PDMS). 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Recommanded Product: Dodecyl 2-methylacrylate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Nakajima, Takumi published the artcileProduction of Alkyl Aryl Sulfides from Aromatic Disulfides and Alkyl Carboxylates via a Disilathiane-Disulfide Interchange Reaction, COA of Formula: C10H10O2, the main research area is alkyl aryl sulfide preparation; aromatic disulfide alkyl carboxylate interchange; alkyl carboxylate; carbon-sulfur bond formation; disilathiane; disulfide; sulfur-sulfur bond cleavage.

The results of this study show that disilathiane was an effective mediator in the synthesis of alkyl aryl sulfides RSR1 [R = Me, Et, Bn, etc.; R1 = Ph, 4-MeC6H4, 2-naphthyl, etc.] with disulfides and alkyl carboxylates. Mechanistic studies suggested that disilathiane promotes cleavage of the sulfur-sulfur bond of disulfides to generate thiosilane as a key intermediate. Diselenides were also applicable to this transformation to produce the corresponding selenides.

Chemistry – An Asian Journal published new progress about Disulfides Role: RCT (Reactant), RACT (Reactant or Reagent). 583-04-0 belongs to class esters-buliding-blocks, name is Allyl benzoate, and the molecular formula is C10H10O2, COA of Formula: C10H10O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Gaaffar, I. F. published the artcileComparison of identified compounds from extracted Pelargonium Radula leaves by supercritical fluid extraction and commercial geranium essential oil, COA of Formula: C9H10O2, the main research area is geranium essential oil supercritical fluid extraction Pelargonium Radula leave.

Supercritical fluid extraction (SFE) is a green technol. that is convenient to extract Pelargonium radula (P. radula) leaves without leaving any neg. impacts on the environment. It is an alternative approach to reduce the solvent residual problem during the extraction process. Therefore, this research was performed to compare the active ingredients extracted by SFE technique with the commercialized geranium essential oil in the market. Extraction of powd. P. radula leaves by supercritical carbon dioxide (SC-CO2) was operated at constant pressure, temperature, and solvent flowrate which were 100 bar, 40°C, and 24 mL/min, resp. SC-CO2 extraction on P. radula leaves result in 0.19% of oil yield. By comparing extracted P. radula oil with the commercialized geranium essential oil, both oil consists of benzyl acetate, citronellol, geraniol, e-amyl cinnamaldehyde, iso-Pr tetradecanoate, and iso-Pr hexadecanoate.

IOP Conference Series: Materials Science and Engineering published new progress about Essential oils Role: ANT (Analyte), ANST (Analytical Study). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, COA of Formula: C9H10O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Figliolia, Rosario published the artcileCNN pincer ruthenium complexes for efficient transfer hydrogenation of biomass-derived carbonyl compounds, Synthetic Route of 539-88-8, the main research area is ruthenium pincer CNN aryl pyridinemethanamine phosphine carbonyl complex preparation; transfer hydrogenation catalyst ketone aldehyde pincer CNN pyridinemethanamine complex; alc preparation transfer hydrogenation cellulose lignin derived aldehyde ketone.

The ligand HCNNOMe [6-(4-methoxyphenyl)-2-pyridinemethanamine, H2NCH2pyC6H4OMe, py = 2,6-pyridinediyl] is easily prepared by Pd/C-catalyzed reductive amination of the com. available 6-(4-methoxyphenyl)-2-pyridinecarboxaldehyde (H2, 1 atm). The pincer complexes cis-[RuCl(H2NCH2pyC6H3OMe)(PPh3)2] (1) and [RuCl(H2NCH2pyC6H3OMe)(PP)] (2, PP = dppb; 3, PP = dppf) are synthesized from [RuCl2(PPh3)3], H2NCH2pyC6H4OMe and dppb or dppf in 2-propanol with NEt3 at reflux and are isolated in 85-93% yield. Carbonylation of 1 (CO, 1 atm) gives [RuCl(H2NCH2pyC6H3OMe)(CO)(PPh3)] (4) (79% yield) which cleanly reacts with Na[BArf4] and PCy3, affording the cationic trans-[Ru(H2NCH2pyC6H3OMe)(CO)(PCy3)(PPh3)][BArF4] (5) (92% yield). These robust pincer complexes display remarkably high catalytic activity in the transfer hydrogenation (TH) of lignocellulosic biomass carbonyl compounds, using 2-propanol at reflux in a basic medium (NaOiPr or K2CO3). Thus, furfural, 5-(hydroxymethyl)furfural and cyrene are reduced to the corresponding alcs. with 2 and 3, at S/C in the range of 10 000-100 000, within minutes or hours (TOF up to 1 500 000 h-1). The monocarbonyl complex 5 was found to be extremely active in the TH of cinnamaldehyde, vanillin derivatives and Et levulinate at S/C in the range of 10 000-50 000. Vanillyl alc. is also obtained by the TH of vanillin with 5 (S/C = 500) in 2-propanol in the presence of K2CO3.

Dalton Transactions published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Synthetic Route of 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics