Alcohols, Polyhydric

Werle, Peter; Morawietz, M.

doi:10.1002/14356007.a01_305

Cited by 10 publications

(7 citation statements)

References 31 publications

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“…The unabated growth in demand for high-quality polymeric materials used in various industries resulted in a growing interest in neopentyl glycol (NPG, 2,2-dimethylpropane-1,3-diol) ( Figure 1 a). NPG is widely used for the preparation of saturated and unsaturated polyester resins, polyethers, polyurethanes, and high-quality alkyd resins [ 1 , 2 ]. NPG is also used for the production of synthetic lubricants, drugs, pesticides, plasticizers, paints, varnishes, and dyes ( Figure 1 b) [ 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

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Development of Methods for the Synthesis of Neopentyl Glycol by Hydrogenation of Hydroxypivaldehyde

et al. 2021

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Neopentyl glycol (NPG) is a precursor for the manufacture of many valuable products of industrial importance such as polyester, polyurethane and alkyd resins, synthetic lubricants, hydraulic fluids, drugs, etc. The structure of NPG provides the resins with excellent hydrolytic stability, resistance to weather conditions, good flexibility-hardness balance, and outstanding functional properties. The paper presents a literature review on the development of methods for NPG preparation, focusing primarily on the synthesis of NPG by hydrogenation of hydroxypivaldehyde, which is obtained by the crossed aldol condensation of isobutyraldehyde and formaldehyde. Preparation of the substrates, catalysts, technical and apparatus solutions, and NPG purification were discussed.

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Section: Introductionmentioning

confidence: 99%

“…In 2018, the NPG market was estimated at USD 3.25 billion [ 11 ] and is expected to augment in the near future. The global production capacity was about 220,000 t/a in the year 2000 [ 2 ] and 400,000 t/a in the year 2008 [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Development of Methods for the Synthesis of Neopentyl Glycol by Hydrogenation of Hydroxypivaldehyde

et al. 2021

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“…1,6-Hexanediol is an important building-block chemical and is applied widely in the synthesis of specialty chemicals and a variety of polymers, primarily in polyesters and polyurethanes, and polyamides such as nylon-6,6 . Industrially, a most common route for 1,6-hexanediol production is catalytic hydrogenation of adipic acid or its esters; among the various esters, dimethyl adipate is a very important raw material. , To obtain a qualified product 1,6-hexanediol, separation and purification steps are necessary, and vapor–liquid equilibrium (VLE) data for dimethyl adipate and 1,6-hexanediol are essentially important for the purpose of designing the distillation process.…”

Section: Introductionmentioning

confidence: 99%

Isobaric Vapor–Liquid Equilibrium for the Binary System of Dimethyl Adipate and 1,6-Hexanediol at 10, 20, and 99 kPa

Yang

Cao

et al. 2019

J. Chem. Eng. Data

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Saturated vapor pressures of pure dimethyl adipate and isobaric vapor–liquid equilibrium (VLE) data for the binary system of dimethyl adipate + 1,6-hexanediol at 10, 20, and 99 kPa were determined by a modified Othmer still. All of the VLE data passed the thermodynamic consistency test by Wisniak and Van Ness methods. The experimental data were correlated with the NRTL, Wilson, and UNIQUAC models. The results showed that the UNIQUAC model is slightly better among the three models.

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“…The world production of bioethanol is estimated to be 22,000 millions of U.S. liquid gallons per year . 1,5-Pentanediol can be obtained by hydrogenation of glutaric acid or using furfural as the starting material. , These ways of synthesizing give the possibility to get sustainable 1,5-pentanediol from renewable feedstock. Compared to the use of ethanol, a lower vapor pressure and an increase in the boiling point of the formulations can be expected.…”

Section: Introductionmentioning

confidence: 99%

Highly and Fully Water Dilutable Sustainable Microemulsions with Dibasic Esters as Oil Phase

Klossek

Touraud

Kunz

2013

ACS Sustainable Chem. Eng.

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In this study, we show a strategy of formulating highly and fully water dilutable sustainable microemulsions with dibasic esters as oil pseudophase. First, dimethyl or diethyl DBEs with different numbers of carbon atoms between the ester functions (succinate C2, glutarate C3, and adipate C4) or DBE blends and a surfactant–cosurfactant melt consisting of sodium dodecylsulfate and 1-pentanol with a constant weight ratio of 1:2 are used. We investigated the extent of the realms of existence of homogeneous single phases and represent them with pseudoternary phase diagrams. It was possible to formulate fully water dilutable oil-rich single-phase solutions with all dimethyl dibasic esters but not with the diethyl ones. By mixing the most hydrophilic dibasic ester with the most hydrophobic one with a mass ratio of 3:2, a fully water dilutable oil-rich single phase could also be obtained. The presence of water-in-oil, bicontinuous, and oil-in-water microemulsions was checked with conductivity and dynamic light scattering measurements. A percolative behavior was observed for all systems. Second, to formulate green and sustainable microemulsions, we replaced successively sodium dodeylsulfate by sodium oleate and 1-pentanol by ethanol or 1,5-pentanediol. With sodium oleate, highly water dilutable microemulsions were obtained. Homogeneous and translucid samples in the very diluted area turned bluish after several days. Longtime pH measurements of systems containing sodium oleate showed no degradation of the dibasic esters at low water content and a rapid hydrolysis at high water content with 1-pentanol as cosurfactant. Always in presence of sodium oleate, the substitution of 1-pentanol by ethanol or 1,5-pentanediol drives the system to microemulsions showing an instability of the ester at any water concentrations. Thermal gravimetric analysis measurements at 32 °C for 24 h confirmed a rapid evaporation of ethanol and water and negligible evaporation of 1,5-pentanediol.

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Alcohols, Polyhydric

Cited by 10 publications

References 31 publications

Development of Methods for the Synthesis of Neopentyl Glycol by Hydrogenation of Hydroxypivaldehyde

Development of Methods for the Synthesis of Neopentyl Glycol by Hydrogenation of Hydroxypivaldehyde

Isobaric Vapor–Liquid Equilibrium for the Binary System of Dimethyl Adipate and 1,6-Hexanediol at 10, 20, and 99 kPa

Highly and Fully Water Dilutable Sustainable Microemulsions with Dibasic Esters as Oil Phase

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