Category: 627-93-0

Zhu, Jian published the artcileSuperb Ni-foam-structured nano-intermetallic InNi₃C_0.5 catalyst for hydrogenation of dimethyl oxalate to ethylene glycol, Category: esters-buliding-blocks, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2021), 130857, database is CAplus.

A high-performance Ni-foam-structured nano-intermetallic InNi₃C_0.5 catalyst is developed for the gas-phase hydrogenation of di-Me oxalate (DMO) to ethylene glycol (EG). The InNi₃C_0.5/Ni-foam catalyst is obtainable by hydrothermal growth of NiC₂O₄ onto the Ni-foam, impregnation with In₂O₃ precursor, subsequent calcination and carburization in a syngas. Despite DMO cascade hydrogenation to MG, then to EG, and finally to EtOH, such catalyst hydrogenates DMO dexterously until to EG with a high turnover frequency of 636 h^-1, because the 3Ni-In and 3Ni-C sites on InNi₃C_0.5(1 1 1) effectively activate DMO but hinder EG over-hydrogenation to EtOH. Favorable reaction pathway on the InNi₃C_0.5(1 1 1) surface predicted theor. is DMO* → CH₃OCOCO* → CH₃OCOCHO* → CH₃OCOCHOH* → MG* → CH₃OCHOCH₂OH* → CHOCH₂OH* → HOCHCH₂OH* → EG*. Moreover, the neutral Ni-foam diminishes the formation of ethers and diols. The catalyst achieves full DMO conversion with 96-98% EG selectivity and is stable for at least 2500 h under industrial-relevant conditions, and can also hydrogenate a broad scope of carbonyl compounds to corresponding alcs. with high yields.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C2H2N4O2, Category: esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Dou, Zhansi published the artcileOne-step preparation of lignin-based solid acid by carbonization and sulfonation to catalyze the synthesis of dimethyl adipate, COA of Formula: C8H14O4, the publication is Industrial Crops and Products (2022), 114721, database is CAplus.

Lignin is a high-quality precursor of carbon materials, rich in content and low in price. Sodium lignosulfonate was used as a raw material to prepare a high-efficiency catalyst for the esterification of adipic acid and methanol to synthesize di-Me adipate by a one-step carbonization sulfonation process. The catalyst synthesized by this method has high sulfonic acid groups, and the catalytic process does not need to use sulfuric acid and other advantages. Through characterization anal., study the relationship between the structure of the catalyst and the catalytic performance. A preliminary study on the industrial application of the catalyst has been done. The optimal reaction conditions were reached when the catalyst dosage is 20% of the mass of adipic acid, the alkyd ratio is 8:1, the stirring speed is 600r/min, the reaction temperature is 346 K, and the reaction time is 120 min.

Industrial Crops and Products published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, COA of Formula: C8H14O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Sharma, Apekshya published the artcileDesigning Safer Solvents to Replace Methylene Chloride for Liquid Chromatography Applications Using Thin-Layer Chromatography as a Screening Tool, Quality Control of 627-93-0, the publication is Separations (2021), 8(10), 172, database is CAplus.

Methylene chloride, commonly known as dichloromethane (DCM), is a widely used chem. for chromatog. separation within the polymer, chem., and pharmaceutical industries. With the ability to effectively solvate heterocyclic compounds, and properties including a low b.p., high d., and low cost, DCM has become the solvent of choice for many different applications. However, DCM has high neurotoxicity and is carcinogenic, with exposure linked to damage to the brain and the central nervous system, even at low exposure levels. This research focuses on sustainability and works towards finding safer alternative solvents to replace DCM in pharmaceutical manufacturing The research was conducted with three active pharmaceutical ingredients (API) widely used in the pharmaceutical industry: acetaminophen, aspirin, and ibuprofen. Thin-layer chromatog. (TLC) was used to investigate if an alternative solvent or solvent blend could show comparable separation performance to DCM. The use of the Hansen Solubility Parameter (HSP) theory and solubility testing allowed for the identification of potential alternative solvents or solvent blends to replace DCM. HSP values for the three APIs were exptl. determined and used to identify safer solvents and blends that could potentially replace DCM. Safer solvents or binary solvent blends were down-selected based on their dissolution power, safety, and price. The down-selected solvents (e.g., Et acetate) and solvent blends were further evaluated using three chem. hazard classification approaches to find the best fitting nonhazardous replacement to DCM. Several safer solvent blends (e.g., mixtures composed of Me acetate and Et acetate) with adequate TLC performance were identified. Results from this study are expected to provide guidance for identifying and evaluating safer solvents to sep. APIs using chromatog.

Separations published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C10H12O5, Quality Control of 627-93-0.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Deng, Weiping published the artcileEfficient Catalysts for the Green Synthesis of Adipic Acid from Biomass, Quality Control of 627-93-0, the publication is Angewandte Chemie, International Edition (2021), 60(9), 4712-4719, database is CAplus and MEDLINE.

Green synthesis of adipic acid from renewable biomass is a very attractive goal of sustainable chem. Herein, we report efficient catalysts for a two-step transformation of cellulose-derived glucose into adipic acid via glucaric acid. Carbon nanotube-supported platinum nanoparticles are found to work efficiently for the oxidation of glucose to glucaric acid. An activated carbon-supported bifunctional catalyst composed of rhenium oxide and palladium is discovered to be powerful for the removal of four hydroxyl groups in glucaric acid, affording adipic acid with a 99% yield. Rhenium oxide functions for the deoxygenation but is less efficient for four hydroxyl group removal. The co-presence of palladium not only catalyzes the hydrogenation of olefin intermediates but also synergistically facilitates the deoxygenation. This work presents a green route for adipic acid synthesis and offers a bifunctional-catalysis strategy for efficient deoxygenation.

Angewandte Chemie, International Edition published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Quality Control of 627-93-0.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Lu, Deli published the artcileBiomass-derived dibasic acids to diesters with inorganic ligand-supported catalyst: synthesis, optimization, characterization, Formula: C8H14O4, the publication is Research on Chemical Intermediates (2022), 48(1), 321-337, database is CAplus.

Several attempts have been made to obtain aliphatic dicarboxylic diesters from esterification reaction to develop the biomass-derived platform mols. and green manufacturing processes. In this paper, Na₃(H₂O)₆[AlMo₆O₁₈(OH)₆], an Anderson-type polyoxometalate, firstly, was reported as a catalyst for diester synthesis from dicarboxylic acid to diester which showed an well productivity and selectivity characterized by ¹H and ¹³C. Response surface methodol. (RSM) integrated with the desirability function approach was used to determine the best operative conditions, and the optimal reaction parameters for maximum di-Pr succinate yield (77 ± 2.5%) were identified as 1.19 mol.% catalyst loading, 4.9:1 propanol/succinic acid ratio, 113°C, and 9.6 h. Three batches of tests were carried for catalyst recycling with 78-75% yield even after 6 cycles of esterification. In addition, the substrate carbon chain was increased for investigation of substrate scope achieving satisfactory results and all products were characterized by ¹H and ¹³C NMR spectroscopy.

Research on Chemical Intermediates published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Formula: C8H14O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Yang, Rulin published the artcileSelective, Sequential, and “One-Pot” Depolymerization Strategies for Chemical Recycling of Commercial Plastics and Mixed Plastics, Computed Properties of 627-93-0, the publication is ACS Sustainable Chemistry & Engineering (2022), 10(30), 9860-9871, database is CAplus.

The com. plastics that are currently used in large-scale are primarily concerned with performance and durability, rather than degradability and recyclability. As a result, the chem. recycling of plastics becomes a significant challenge. Selective depolymerization of the mixed plastic waste is a promising solution to the challenges caused by plastic accumulation. Here we present sequential and “one-pot” depolymerization strategies for chem. recycling of com. plastics (PLA, BPA-PC, PBS, PBAT, PCL, and PET) and mixed plastics (BPA-PC/PET, PLA/PBS, and PLA/PBAT) to their initial monomers or value-added chems. Taking advantage of the differences in depolymerization reactivity of com. plastics and versatile catalytic degradation ability of zinc bis[bis(trimethylsilyl)amide] [Zn(HMDS)₂], the selective depolymerization process was smoothly achieved under mild conditions. These strategies provide ideas for promoting the sustainable development of plastics that are currently being used in large-scale.

ACS Sustainable Chemistry & Engineering published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C5H9IO2, Computed Properties of 627-93-0.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Qiu, Jia published the artcileDibasic esters observed as potential emerging indoor air pollutants in new apartments in Beijing, China, COA of Formula: C8H14O4, the publication is Environmental Science & Technology Letters (2021), 8(6), 445-450, database is CAplus.

Volatile organic compounds (VOCs) emitted from building and furnishing materials represent a major concern of indoor air quality, in particular in new buildings. We carried out multiweek nontargeted VOC measurements in 10 new apartments in Beijing, China, using online chem. ionization mass spectrometry. Di-Me esters of succinic, glutaric, and adipic acids, which are rarely known for their presence in indoor air, were identified in three apartments. The identification was confirmed using authentic standards and by gas chromatog./mass spectrometry anal. Despite varying concentrations, the three compounds exhibited largely consistent ratios across the three apartments and throughout the observation periods. The observed ratios resemble chem. composition of dibasic esters (DBE), which are a solvent mixture of the three compounds and have been used in the coating industry. A field “sniffing” experiment further confirms DBE emissions from the coatings of some wooden furniture in at least one apartment. The average airborne DBE concentrations in the three apartments were 41, 5, and 4μg/m³, resp., exceeding the screening level of 1μg/m³ recommended by the Michigan Department of Environmental Quality, United States. In the context of fast-growing DBE usage, the current results suggest that DBE might be emerging indoor air pollutants and merit further investigation.

Environmental Science & Technology Letters published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, COA of Formula: C8H14O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Ye, Shuxian published the artcileNonisocyanate CO₂-Based Poly(ester-co-urethane)s with Tunable Performances: A Potential Alternative to Improve the Biodegradability of PBAT, Safety of Dimethyl adipate, the publication is ACS Sustainable Chemistry & Engineering (2020), 8(4), 1923-1932, database is CAplus.

The objective of this study is to develop a nonisocyanate route to prepare a biodegradable CO₂-based poly(ester-co-urethane) (PEU), which has some improved performances when compared with com. poly(butylene adipate-co-terephthalate) (PBAT). These performances include mech. properties, biodegradability, and melt processability. Specifically, five bis-alkylcarbamates were synthesized from diamines, methanol, and CO₂. Subsequently, 1,4-butanediol (BDO) and di-Me terephthalate (DMT) reacted with five kinds of CO₂-based bis-alkylcarbamates to study the influence of methylene group number on the performances of PEUs. Moreover, the effect of various ratios of aromatic to aliphatic blocks in PEUs on their properties was systematically investigated. Addnl., the hydrolytic stability of synthesized PEUs was evaluated upon the degradation percentage in phosphate-buffered saline. The semicrystalline PEUs with tunable properties exhibit an initial thermal decomposition temperature of over 273.7°C and a T_g above 12.4°C. Due to the presence of hydrogen bonding, the tensile strength is as high as 49 MPa. The designed and synthesized PEUs are promising as a potential biodegradable thermoplastic with superior performances when compared with com. PBAT. A novel high-performance polymer like biodegradable PBAT was synthesized via a green and efficient copolymerization from CO₂-based bis-alkycarbamate.

ACS Sustainable Chemistry & Engineering published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C15H14O3, Safety of Dimethyl adipate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Li, Jun-xing published the artcileDetection and comparison of volatiles in fruit from three different kinds of loofah, Recommanded Product: Dimethyl adipate, the publication is Xiandai Shipin Keji (2021), 37(7), 228-237, database is CAplus.

To fully identify the volatile compounds of loofah fruit aroma, and understand the variation features in different types of loofah, head space solid-phase micro-extraction (HS-SPME) combined with gas chromatog. (GC)-mass spectrometry (MS) was used to analyze the volatile profiles of three kinds of loofah (SG, DR and YL). A total of 55 volatiles were identified in three kinds of materials, in which 15 kinds of hydrocarbon compounds were identified and showed the most species. The 43, 52 and 47 volatiles were detected in the YL, DR and SG, resp., in which benzaldehyde, nonanal and linalool with the highest relative content, resp. The principal component anal. and hierarchical cluster anal. based on the 55 compounds were used. It indicated that SG was clearly distinguished from DR and YL, and the volatiles in DR and YL were similar. These results were consistent with the biol. classification of three types of resources. The 30 distinct volatiles (p<0.05) were detected in two groups of three types of loofah through one-factor ANOVA. The 20 variant volatiles were displayed the higher contents compared to these of DR and YL. Hexanal and (E)-2-Hexenal were mainly related to the green aroma characteristics, while benzeneacetaldehyde might result in the sweet aroma in DR. The results of this work will provide the reference for the research of flavor traits and quality breeding of loofah.

Xiandai Shipin Keji published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Recommanded Product: Dimethyl adipate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Rader, Chris published the artcileBiobased Polyester-Amide/Cellulose Nanocrystal Nanocomposites for Food Packaging, Product Details of C8H14O4, the publication is Macromolecular Materials and Engineering (2021), 306(3), 2000668, database is CAplus.

The worldwide plastic waste production is steadily increasing, since the use of polymeric materials continues to rise. One area of particular high plastic consumption is food packaging. Flexible and rigid packaging films are typically made from petrochem.-sourced polymers, which are utilized because of their low cost, ductility, melt-processability, and gas barrier properties, but a major downside is their inability to biodegrade in a reasonable time. Packaging-relevant properties of nanocomposites based on polyester-amides (PEAs) are reported, which are chosen on account of their tunable crystallinity, biobased starting materials, and biodegradability. These polymers are synthesized via melt polycondensation of a building block made from caprolactone and 1,4-diaminobutane, with the addition of 1,4-butanediol and di-Me adipate. The fraction of the amide segment is varied between 25 and 75 mol%. The oxygen transmission rate (O₂TR) drops upon increasing the amide content from 1.6 × 105 to 2.9 × 10^-4 cm³ m^-2 d^-1 on account of increasing crystallinity. In order to improve the gas barrier properties further, nanocomposites of the PEAs and 1-10 weight% cellulose nanocrystals (CNCs) are prepared These nanocomposites have indeed lower O₂TR values than the neat PEAs, with reductions of as much as 50% for a CNC content of 10 weight%.

Macromolecular Materials and Engineering published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Product Details of C8H14O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics