Tag: M.W=150-200

Marso, Tuan Mohommed Mudassar published the artcileZnO/CuO composite catalyst to pre-esterify waste coconut oil for producing biodiesel in high yield, Safety of Methyl octanoate, the main research area is zinc copper oxide composite catalyst waste coconut oil biodiesel.

The study reported herein describes a two-stepped catalytic approach to produce biodiesel from waste-coconut oil in high (> 90%) yield. In this regard, pre-esterification of the Free Fatty Acid (FFA) content (9.58 mg KOH g-1) of waste coconut oil in the presence of a simple ZnO/CuO composite, as a heterogeneous acid-catalyst to prevent competitive saponification and hydrolysis side reactions caused by FFA, followed by the base-catalyzed transesterification of the triglyceride of oil was performed. The ZnO/CuO catalyst was synthesized using a simultaneous precipitation method, and characterized by spectroscopic (FTIR, UV-Vis), SEM, XRD and XRF techniques. The surface acidity of the catalyst and the FFA value (AV) of the oil before and after the pre-esterification was determined using the Hammett indicator method. The pre-esterification was performed at different temperatures (5-125°C), time intervals (15-235 min), and using different weight percentages (wt%) of catalyst loading (0.005-2.665) and methanol-to-oil ratios. The optimum reaction conditions were identified using a central composite rotatable design (CCRD). The results of the study revealed that a small amount of the catalyst (1.66 wt%) is enough, and the catalyst could be easily recovered and reused 3-4 catalytic runs for reducing the AV of waste coconut oil by 94.53% under milder conditions (within 113 min, at 55°C in the presence of 10.5:1 methanol-to-oil ratio) than those conditions reported so far. The biodiesel obtained this way was free from soap, and consistent with ASTM-D6751 and EN-14214 standards

Reaction Kinetics, Mechanisms and Catalysis published new progress about Acid number. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Safety of Methyl octanoate.

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

Li, Lu published the artcileDecreasing the acid value of pyrolysis oil via esterification using ZrO2/SBA-15 as a solid acid catalyst, HPLC of Formula: 110-42-9, the main research area is zirconia silica solid acid catalyst oil esterification.

The high acid value of pyrolysis oil obtained from biol. oil is the main drawback that not only affects the properties of pyrolysis oil, but also leads to the corrosion of equipment. Herein, pyrolysis oil obtained from rubber seed oil was upgraded via esterification using ZrO2/SBA-15 as a solid acid catalyst. Using ZrO2/SBA-15 as a catalyst, the acid value of the esterified pyrolysis oil obtained from rubber seed oil was only 1.2 mg KOH·g-1. The d. and kinematic viscosity both reached the standard range of 0# diesel oil. The excellent catalytic activity of ZrO2/SBA-15 was studied using NH3-TPD and Py-IR. Furthermore, the conversion reached 96.7% when the ZrO2/SBA-15 catalyst was re-used three times, which shows the ZrO2/SBA-15 catalyst possessed excellent catalytic activity and stability for upgrading pyrolysis oil via esterification.

Renewable Energy published new progress about Acid number. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, HPLC of Formula: 110-42-9.

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

Li, Lu published the artcileDecreasing the acid value of pyrolysis oil via esterification using ZrO2/SBA-15 as a solid acid catalyst, Name: Methyl octanoate, the main research area is zirconia silica solid acid catalyst oil esterification.

The high acid value of pyrolysis oil obtained from biol. oil is the main drawback that not only affects the properties of pyrolysis oil, but also leads to the corrosion of equipment. Herein, pyrolysis oil obtained from rubber seed oil was upgraded via esterification using ZrO2/SBA-15 as a solid acid catalyst. Using ZrO2/SBA-15 as a catalyst, the acid value of the esterified pyrolysis oil obtained from rubber seed oil was only 1.2 mg KOH·g-1. The d. and kinematic viscosity both reached the standard range of 0# diesel oil. The excellent catalytic activity of ZrO2/SBA-15 was studied using NH3-TPD and Py-IR. Furthermore, the conversion reached 96.7% when the ZrO2/SBA-15 catalyst was re-used three times, which shows the ZrO2/SBA-15 catalyst possessed excellent catalytic activity and stability for upgrading pyrolysis oil via esterification.

Renewable Energy published new progress about Acid number. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Name: Methyl octanoate.

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

Ding, Wenwu published the artcileFermentation characteristics of Pixian broad bean paste in closed system of gradient steady-state temperature field, Application In Synthesis of 110-42-9, the main research area is fermentation Pixian broad bean paste temperature; Correlation; Gradient steady-state temperature field; Microbial communities; Physicochemical factors; Pixian broad bean paste; Volatile components.

A closed system of gradient steady-state temperature field (GSTF) was constructed to ferment Pixian broad bean paste (PBP). The contents of physicochem. factors and organic acids in the fermentation under GSTF (FG) were closer to those in the traditional fermentation (TF). The taste intensities of 8 free amino acids in the FG were higher than those in the constant temperature fermentation (CTF), but 14 in the TF showed the highest among the processes of FG, CTF and TF. The FG product had the most volatiles with 87, and its flavor properties were more stable. The FG produced great effects on the microbe evolutions especially improved the fungal diversity. Bacillus were identified as the core microbes in the FG while the roles of Staphylococcus, Lactobacillus and Pantoea were strengthened. The results indicated that the fermentation characteristics in the FG had been further improved compared with the CTF.

Food Chemistry published new progress about Acetobacter. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Application In Synthesis of 110-42-9.

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

Ding, Wenwu published the artcileFermentation characteristics of Pixian broad bean paste in closed system of gradient steady-state temperature field, Product Details of C11H22O2, the main research area is fermentation Pixian broad bean paste temperature; Correlation; Gradient steady-state temperature field; Microbial communities; Physicochemical factors; Pixian broad bean paste; Volatile components.

A closed system of gradient steady-state temperature field (GSTF) was constructed to ferment Pixian broad bean paste (PBP). The contents of physicochem. factors and organic acids in the fermentation under GSTF (FG) were closer to those in the traditional fermentation (TF). The taste intensities of 8 free amino acids in the FG were higher than those in the constant temperature fermentation (CTF), but 14 in the TF showed the highest among the processes of FG, CTF and TF. The FG product had the most volatiles with 87, and its flavor properties were more stable. The FG produced great effects on the microbe evolutions especially improved the fungal diversity. Bacillus were identified as the core microbes in the FG while the roles of Staphylococcus, Lactobacillus and Pantoea were strengthened. The results indicated that the fermentation characteristics in the FG had been further improved compared with the CTF.

Food Chemistry published new progress about Acetobacter. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Product Details of C11H22O2.

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

Oosthoek-de Vries, Anna Jo published the artcileInline Reaction Monitoring of Amine-Catalyzed Acetylation of Benzyl Alcohol Using a Microfluidic Stripline Nuclear Magnetic Resonance Setup, Recommanded Product: Benzyl acetate, the main research area is amine catalyzed acetylation benzyl alc microfluidic stripline NMR monitoring.

We present an in-depth study of the acetylation of benzyl alc. in the presence of N,N-diisopropylethylamine (DIPEA) by NMR monitoring of the reaction from 1.5 s to several minutes. We have adapted the NMR setup to be compatible to microreactor technol., scaling down the typical sample volume of com. NMR probes (500 μL) to a microfluidic stripline setup with 150 nL detection volume Inline spectra are obtained to monitor the kinetics and unravel the reaction mechanism of this industrially relevant reaction. The experiments are combined with conventional 2D NMR measurements to identify the reaction products. In addition, we replace DIPEA with triethylamine and pyridine to validate the reaction mechanism for different amine catalysts. In all three acetylation reactions, we find that the acetyl ammonium ion is a key intermediate. The formation of ketene is observed during the first minutes of the reaction when tertiary amines were present. The pyridine-catalyzed reaction proceeds via a different mechanism.

Journal of the American Chemical Society published new progress about Acetylation. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Recommanded Product: Benzyl acetate.

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

Javaherian, Mohammad published the artcileNano-silica melamine trisulfonic acid as an efficient and reusable heterogeneous catalyst in esterification reactions, Formula: C10H10O2, the main research area is silica melamine trisulfonic acid catalyst esterification reaction.

The use of nano-silica melamine trisulfonic acid as a reusable heterogeneous solid acid catalyst in the esterification reaction of carboxylic acids and alcs. is reported. The reaction conditions were optimized by testing temperature, each component of catalyst, feedstock ratios as well as load of catalyst. The synthesized catalyst was characterized by X-ray diffraction, SEM, Fourier transform IR spectroscopy, and thermogravimetric anal. techniques. The results showed that nano-silica melamine trisulfonic acid was an efficient dehydrating agent in the condensing reactions between different kinds of aliphatic and aromatic carboxylic acids and alcs. The method was simple, rapid, straightforward, catalyst reusability, and holds potential for further application in acid-catalyzed organic synthesis and industrial requirements.

Journal of the Iranian Chemical Society published new progress about Acetylation. 583-04-0 belongs to class esters-buliding-blocks, name is Allyl benzoate, and the molecular formula is C10H10O2, Formula: C10H10O2.

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

Javaherian, Mohammad published the artcileNano-silica melamine trisulfonic acid as an efficient and reusable heterogeneous catalyst in esterification reactions, Quality Control of 140-11-4, the main research area is silica melamine trisulfonic acid catalyst esterification reaction.

The use of nano-silica melamine trisulfonic acid as a reusable heterogeneous solid acid catalyst in the esterification reaction of carboxylic acids and alcs. is reported. The reaction conditions were optimized by testing temperature, each component of catalyst, feedstock ratios as well as load of catalyst. The synthesized catalyst was characterized by X-ray diffraction, SEM, Fourier transform IR spectroscopy, and thermogravimetric anal. techniques. The results showed that nano-silica melamine trisulfonic acid was an efficient dehydrating agent in the condensing reactions between different kinds of aliphatic and aromatic carboxylic acids and alcs. The method was simple, rapid, straightforward, catalyst reusability, and holds potential for further application in acid-catalyzed organic synthesis and industrial requirements.

Journal of the Iranian Chemical Society published new progress about Acetylation. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Quality Control of 140-11-4.

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

Veisi, Hojat published the artcileFe3O4@PEG core/shell nanoparticles as magnetic nanocatalyst for acetylation of amines and alcohols using ultrasound irradiations under solvent-free conditions, Computed Properties of 140-11-4, the main research area is iron oxide polyoxyethylene core shell nanoparticle magnetic nanocatalyst acetylation; alc acetylation catalyst mangetic nanocomposte green.

Ultrasound irradiation was used to prepare one-pot Fe3O4@PEG core/shell nanostructure for the first time. The morphol., structure, and physicochem. properties were specified by different anal. techniques including field emission SEM, Fourier transform IR spectroscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, X-ray powder diffraction, and vibrating sample magnetometer. For acetylation of phenols, alcs., and amines, the synthesized Fe3O4@PEG core/shell nanoparticles were used as an efficient heterogeneous and green catalyst with acetic anhydride under sonication applying mild reaction conditions. Different electron-withdrawing and electron-donating substrates indicate a prominent yield of desired products with the merit of reusability of Fe3O4@PEG nanocatalyst and magnetic separation

Research on Chemical Intermediates published new progress about Acetylation. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Computed Properties of 140-11-4.

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

Khaligh, Nader Ghaffari published the artcile4-Imidazol-1-yl-butane-1-sulfonic acid ionic liquid: Synthesis, structural analysis, physical properties and catalytic application as dual solvent-catalyst, Product Details of C9H10O2, the main research area is imidazolylbutanesulfonic acid ionic liquid preparation solvent catalyst property; acetylation alc phenol thiol amine tocopherol green chem.

4-Imidazol-1-yl-butane-1-sulfonic acid (ImBu-SO3H) has been successfully synthesized and fully characterized by FT-IR and high-resolution NMR spectroscopy (1H, 13C). The “”plausible”” alternative structures of ImBu-SO3H were discussed on the basis of its NMR data. The ionic liquid showed interesting dual solvent-catalyst property, which was studied exptl. for the acetylation of a variety of functionalized alcs., phenols, thiols, amines and α-tocopherol (α-CTP) as the most active form of vitamin E with acetic anhydride and which provided good yields within a short reaction time. ImBu-SO3H was successfully recycled by product extraction with an average recovered yield of 82% for 5 subsequent runs. The catalytic activity of the recycled ImBu-SO3H showed almost no loss even after five consecutive runs.

Phosphorus, Sulfur and Silicon and the Related Elements published new progress about Acetylation. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Product Details of C9H10O2.

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