The structure of organotin oxides playing a key role on the transesterification of dimethyl carbonate with hydrogenated bisphenol A

Xia, Ranran; Li, Zhenhuan; Cheng, Bowen; Su, Kunmei

doi:10.1007/s11814-013-0247-9

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…It is also used in electrolytic lithium batteries [3]. DMC is used in the production of glycerol carbonate [4,5], O-methylation [6], diphenyl carbonate [7], and can be used as a substitute in place of many conventional solvents [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Dimethyl carbonate synthesis via transesterification of propylene carbonate with methanol by ceria-zinc catalysts: Role of catalyst support and reaction parameters

Kumar

Srivastava

Mishra

2015

Korean J. Chem. Eng.

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Ceria and zinc oxide catalyst were impregnated onto various oxide supports, namely Al 2 O 3 , TiO 2 and SiO 2 , individually by deposition-coprecipitation method. The synthesized catalysts (CZA, CZS and CZT having supports Al 2 O 3 , TiO 2 and SiO 2 , respectively) were characterized by X-ray diffraction (XRD), NH 3 -and CO 2 -temperature programmed desorption (TPD) and N 2 adsorption. These catalysts were used for synthesis of dimethyl carbonate (DMC) from methanol and propylene carbonate in a batch reactor. CZS was found to have larger average grain size as compared to CZA and CZT. Composite oxides (catalysts) were found to contain individual phases of ZnO, CeO 2 and some spinel forms of Zn, Ce along with their supports. CZS having highest basicity and surface area showed better catalytic activity as compared to CZA and CZT. Effect of reaction temperature and methanol/PC molar ratio on DMC yield was studied and a reaction mechanism has been discussed. Maximum DMC yield of 77% was observed with CZS catalyst at 170 o C with methanol/PC molar ratio of 10.

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Section: Introductionmentioning

confidence: 99%

Dimethyl carbonate synthesis via transesterification of propylene carbonate with methanol by ceria-zinc catalysts: Role of catalyst support and reaction parameters

Kumar

Srivastava

Mishra

2015

Korean J. Chem. Eng.

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“…Using this device, butane‐1,4‐diyl dimethyl dicarbonate was efficiently synthesized by feeding only 3 equiv DMC per BD. Various catalysts have been developed for the transesterification reaction, but we could convert all the OH groups in BD to methyl carbonate using a small amount of simple NaOH catalyst (0.5 mol % per BD) at 120 °C for 3 h. In the 1 H NMR spectra, C(O)OC H 2 and C H 3 OC(O) signals were observed at 4.16 and 3.76 ppm, respectively, with almost equal integration [Figure (a)]. This indicates that a mixture of MeOC(O)O(CH 2 ) 4 OC(O)OMe and MeO[C(O)O(CH 2 ) 4 O] 2 C(O)OMe was generated in 1:1 mole ratio.…”

Section: Resultsmentioning

confidence: 99%

“…Since DMC is abundant and inexpensive, its efficient conversion to other dialkyl carbonates is significant . Dialkyl carbonates are widely used as the electrolyte in lithium‐ion battery, fuel additives, and green solvents .…”

Section: Resultsmentioning

confidence: 99%

Efficient synthesis of organic carbonates and poly(1,4‐butylene carbonate‐co‐terephthalate)s

Kim

Jeon

Chun

et al. 2017

J of Applied Polymer Sci

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Dimethyl carbonate (DMC) is an environmentally benign chemical currently produced using CO 2 . Using the conventional Dean-Stark apparatus, a method was developed for the effective and selective removal of the methanol generated in the transesterification of DMC with alcohol. Using this device, various diols (HO-A-OH; A 5 (CH 2 ) 4 , (CH 2 ) 2 O(CH 2 ) 2 , CH 2 C 6 H 10 CH 2 , and CH 2 C 6 H 4 CH 2 ) were converted to mixtures of the corresponding MeOC (O)[O-A-OC(O)]OMe and MeOC(O)[O-A-OC(O)] 2 OMe. Dialkyl carbonates such as dibutyl carbonate, dibenzyl carbonate, and diallyl carbonate were also efficiently prepared from the corresponding alcohols using this device. The compound prepared from 1,4-butanediol, MeOC(O)[O(CH 2 ) 4 OC(O)] 1.5 OMe, was subjected to polycondensation with HO(CH 2 ) 4 [O 2 CC 6 H 4 CO 2 (CH 2 ) 4 ] 1.5 OH or HO(CH 2 ) 4 [O 2 CC 6 H 4 CO 2 (CH 2 ) 4 ] 1.8 OH, which directly was prepared from terephthalic acid and 1,4-butanediol. The polycondensation afforded high-molecular-weight poly(1,4-butylene carbonate-co-terephthalate)s (PBCTs) with M w of 80-270 kDa and 0.40-0.46 terephthalate mole fractions. PBCTs are attractive materials with potential biodegradability and LDPE-like thermal properties.

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“…Polycarbonates (PCs) exhibit exceptional mechanical, optical, and thermal properties, − rendering them valuable as engineering plastics in industries such as auto manufacturing, optical lenses, and electronic components. − Although petroleum-based bisphenol A (BPA) is commonly employed as a monomer to synthesize traditional PC, − petroleum resources are unsustainable, and the estrogenic effect of petroleum-based BPA has negative effects on human reproductive systems. , Exploring renewable and biosecurity monomers for the synthesis of PCs has become a prominent area of research …”

Section: Introductionmentioning

confidence: 99%

Design and Synthesis of Optical Biobased Polycarbonates with High Refractive Index and Low Birefringence

Li,

Wang,

Yan

et al. 2024

Ind. Eng. Chem. Res.

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Biobased poly(isosorbide carbonate) (PIC) has the advantages of renewable sources, nontoxic environmental resistance, and high transparency. However, the optical properties of PIC are limited by the rigid alicyclic skeleton within polymer chains, resulting in a low refractive index and high birefringence. In this work, a novel diether anthraquinone (DAQ) monomer containing an aromatic cardo-ring and carbonyl-modified side group was designed and synthesized, which successfully improved the refractive index and inhibited the birefringence by reducing optical anisotropy combined with increasing the molar refractive index of repeating units. To overcome the potential steric effect of DAQ and low activity of endo-OH groups on isosorbide (ISB), highly active choline tartaric acid (ChTa) ionic liquid catalysts were designed and evaluated systematically, resulting in a series of copolymers with sufficient M w (up to 140,800 g/mol). Notably, poly(ISB-co-DAQ carbonate) with 30/70 mol % of ISB/DAQ (PI 30 D 70 C) exhibited excellent optical properties with ignorable birefringence (Δn = 0.0005) and high transmittance (89%), and especially higher refractive index (n d = 1.6207) than PIC (n d = 1.4966) at 589 nm. Additionally, the copolycarbonates had excellent thermal, mechanical, and hydrophobicity properties, indicating their potential for optical applications and providing a strategy for designing optical polycarbonates.

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The structure of organotin oxides playing a key role on the transesterification of dimethyl carbonate with hydrogenated bisphenol A

Cited by 6 publications

References 14 publications

Dimethyl carbonate synthesis via transesterification of propylene carbonate with methanol by ceria-zinc catalysts: Role of catalyst support and reaction parameters

Dimethyl carbonate synthesis via transesterification of propylene carbonate with methanol by ceria-zinc catalysts: Role of catalyst support and reaction parameters

Efficient synthesis of organic carbonates and poly(1,4‐butylene carbonate‐co‐terephthalate)s

Design and Synthesis of Optical Biobased Polycarbonates with High Refractive Index and Low Birefringence

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