Low-molecular-weight, fatty-acid esters as potential low-temperature drilling fluids for ice coring

AbstractA challenge for future deep-ice coring in central Antarctica is to identify an appropriate inert drilling fluid with no undesirable physical or chemical characteristics. The drilling fluids currently in use (kerosene-based fluids with density-increasing additives, ethanol and n-butyl acetate) are not intelligent choices for the future from safety, environmental and some technological standpoints. Recently proposed drilling fluids based upon ESTISOL™ have high viscosity at low temperatures, which severely limits their application in cold environments. This paper presents our research into the application of low-molecular-weight, fatty-acid esters (FAEs), substances commonly used in the fragrance and flavoring industries. According to available data, selected FAEs are not hazardous to human health. Considering density requirements alone, ethyl butyrate and n-propyl propionate best meet our present needs. The viscosities of these two chemicals are also the lowest among studied FAEs, not exceeding 4 mPas at temperatures down to −60°C. Both compounds are highly volatile, and insoluble in water. Such properties are attractive, but the applicability of FAEs to deep, cold, ice drilling can be evaluated only after field-based, practical experiments in test boreholes.

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FRACTIONATION OF FATTY ACID ESTERS AND ACYLGLYCERIDES WITH PRESSURIZED CO2

Latin American Applied Research - An international journal ◽

10.52292/j.laar.2019.39 ◽

2019 ◽

Vol 49 (2) ◽

pp. 117-124

Author(s):

Natalia Cotabarren ◽

Pablo Hegel ◽

Selva Pereda

Keyword(s):

Fatty Acid ◽

Vegetable Oils ◽

High Viscosity ◽

Operating Conditions ◽

Fatty Acid Esters ◽

Emulsifying Properties ◽

Relative Volatility ◽

Fractionation Process ◽

Synthesis Routes ◽

Acid Esters

Fatty mono- and di-glycerides are products highly used in the food, cleaning and cosmetic industries because of their emulsifying properties. These products can be obtained through different synthesis routes, namely, glycerolysis of vegetable oils, direct esterification of fatty acids with glycerol or partial transesterification of vegetable oils with alcohols. The last two chemical pathways produce fatty acid esters besides mono/diglycerides, which are difficult to split and purify at industrial scale because of its low vapor pressure, low relative volatility, and high viscosity. In this work, we evaluate the fractionation of fatty acid esters and acylglycerides by supercritical CO2 technology. High pressure experimental extractions were carried out at different operating conditions to validate the technology and a rigorous thermodynamic model was used to evaluate the fractionation process.

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Comprehensive evaluation for the one-pot biosynthesis of butyl-acetate by using microbial mono and co-cultures

10.22541/au.162171742.20498101/v1 ◽

2021 ◽

Author(s):

Yang Lv ◽

Yujia Jiang ◽

Jiasheng Lu ◽

Hao Gao ◽

Weiliang Dong ◽

...

Keyword(s):

Fatty Acid ◽

Butyl Acetate ◽

Short Chain Fatty Acid ◽

Chain Fatty Acid ◽

Fatty Acid Esters ◽

Microbial Fermentation ◽

Acetate Production ◽

One Pot ◽

The One ◽

Acid Esters

Butyl acetate has shown wide attention in food, cosmetics, medicine and biofuel sectors. These short chain fatty acid esters can be produced by either chemical or biological synthetic process with corresponding alcohols and acids. Currently, biosynthesis of short chain fatty acid esters, such as butyl butyrate through microbial fermentation systems has been achieved; however, few studies regarding biosynthesis of butyl acetate were reported. In this study, three proof-of-principle strategies for the one-pot butyl acetate production from glucose by microbial fermentation was designed and evaluated. (1) 7.3 g/L of butyl acetate was synthesized by butanol producing Clostridium acetobutylicum NJ4 with the supplementation of exogenous acetic acid; (2) With the addition of butanol, 5.76 g/L of butyl acetate can be synthesized by acetate producing Actinobacillus succinogenes130z (ΔpflA) with the supplementation of exogenous butanol; (3) Microbial co-culture of C. acetobutylicum NJ4 and A. succinogenes130z (ΔpflA) can directly produce 2.2 g/L of butyl acetate from glucose, representing the first study in terms of butyl acetate production by using microbial co-culture system. Through the immobilization of A. succinogenes130z (ΔpflA), butyl acetate production was further improved to 2.86 g/L. These strategies may be extended to the biosynthesis of a wide range of esters, especially to some longer chain ones.

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Comprehensive evaluation for the one-pot biosynthesis of butyl acetate by using microbial mono- and co-cultures

Biotechnology for Biofuels ◽

10.1186/s13068-021-02053-2 ◽

2021 ◽

Vol 14 (1) ◽

Author(s):

Yang Lv ◽

Yujia Jiang ◽

Jiasheng Lu ◽

Hao Gao ◽

Weiliang Dong ◽

...

Keyword(s):

Fatty Acid ◽

Butyl Acetate ◽

Short Chain Fatty Acid ◽

Chain Fatty Acid ◽

Fatty Acid Esters ◽

Microbial Fermentation ◽

Acetate Production ◽

One Pot ◽

The One ◽

Acid Esters

Abstract Background Butyl acetate has shown wide applications in food, cosmetics, medicine, and biofuel sectors. These short-chain fatty acid esters can be produced by either chemical or biological synthetic process with corresponding alcohols and acids. Currently, biosynthesis of short chain fatty acid esters, such as butyl butyrate, through microbial fermentation systems has been achieved; however, few studies regarding biosynthesis of butyl acetate were reported. Results In this study, three proof-of-principle strategies for the one-pot butyl acetate production from glucose through microbial fermentation were designed and evaluated. (1) 7.3 g/L of butyl acetate was synthesized by butanol-producing Clostridium acetobutylicum NJ4 with the supplementation of exogenous acetic acid; (2) With the addition of butanol, 5.76 g/L of butyl acetate can be synthesized by acetate-producing Actinobacillus succinogenes130z (ΔpflA); (3) Microbial co-culture of C. acetobutylicum NJ4 and A. succinogenes130z (ΔpflA) can directly produce 2.2 g/L of butyl acetate from glucose by using microbial co-culture system with the elimination of precursors. Through the further immobilization of A. succinogenes130z (ΔpflA), butyl acetate production was improved to 2.86 g/L. Conclusion Different microbial mono- and co-culture systems for butyl acetate biosynthesis were successfully constructed. These strategies may be extended to the biosynthesis of a wide range of esters, especially to some longer chain ones.

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Investigation and Application of New Polyamine Salt Inhibitor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.518-523.594 ◽

2012 ◽

Vol 518-523 ◽

pp. 594-597

Author(s):

Hong Wei Zhang ◽

Feng Jiang Zuo ◽

Ye Tian ◽

Dong Min Jia ◽

Yan Mei Liu ◽

...

Keyword(s):

Molecular Weight ◽

Drilling Fluid ◽

Organic Salt ◽

Low Molecular Weight ◽

Drilling Fluids ◽

Inhibition Ability

A new kind of polyamine salt inhibitor (code name BH-JAI) with low molecular weight, was synthesized and evaluated in the lab. The tests showed that BH-JAI could suppress the hydration and dispertion of reactive claystone effectively, compatible with organic salt or KCl water drilling fluid, and could play its role of inhibition even at temperature as high as 200°C. The field tested in 5 wells suggested that the new polyamine salt could enhance the inhibition ability of drilling fluids obviously, and reduce downhole complex accidents such as sloughing and tight hole efficiently.

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Development of the determination methods of fatty acid esters of chloropropanediols in fat-rich foods

Chinese Journal of Chromatography ◽

10.3724/sp.j.1123.2012.09002 ◽

2014 ◽

Vol 31 (2) ◽

pp. 95-101

Author(s):

Xiaobo YAN ◽

Shaoming WU ◽

Nan LI ◽

Huadong LV ◽

Wusheng FU

Keyword(s):

Fatty Acid ◽

Fatty Acid Esters ◽

Determination Methods ◽

Acid Esters

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Mesomorphic Behaviour of Saturated and Monounsaturated C18 and C22 Fatty Acid Esters of Cholesterol

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19940833 ◽

1994 ◽

Vol 59 (4) ◽

pp. 833-840

Author(s):

Slavomír Pirkl

Keyword(s):

Phase Transitions ◽

Fatty Acid ◽

Fatty Acid Esters ◽

Aliphatic Esters ◽

Acid Esters

The phase transitions and effective optical rotary power of saturated and monounsaturated aliphatic esters of cholesterol with 18 and 22 carbon atoms in the chain have been described. The effect of cis/trans isomerism on these properties is discussed.

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The occurrence of long chain polyprenols in leaves of plants of Rosaceae family and their isolation by time-extended liquid chromatography

Biochemistry and Cell Biology ◽

10.1139/o92-068 ◽

1992 ◽

Vol 70 (6) ◽

pp. 448-454 ◽

Cited By ~ 9

Author(s):

Ewa Świeżewska ◽

T. Chojnacki ◽

W. J. Jankowski ◽

K. Singh ◽

J. Olsson

Keyword(s):

Liquid Chromatography ◽

Fatty Acid ◽

Large Scale ◽

Fatty Acid Esters ◽

Large Scale Preparation ◽

Scale Preparation ◽

Wet Weight ◽

Rosaceae Family ◽

Acid Esters ◽

Long Chain

The long chain polyprenols composed of 30 and more isoprene units from leaves of plants belonging to the genera Potentilla and Rosa have been described. They occur in the form of fatty acid esters. The composition of polyprenol mixture was species dependent and its content reached ca. 0.5% wet weight. Large scale preparation of individual polyprenols from a natural polyprenol mixture was performed using time-extended liquid chromatography on the hydrophobic gel Lipidex-5000.Key words: long chain polyprenols, Rosaceae.

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Separation of Fatty Acid Dimethyl Esters on an Ionic Liquid Gas Chromatographic Column

Journal of Chromatographic Science ◽

10.1093/chromsci/bmaa097 ◽

2020 ◽

Author(s):

R E Pauls ◽

B Pease

Keyword(s):

Ionic Liquid ◽

Fatty Acid ◽

Stationary Phases ◽

Carbon Number ◽

Fatty Acid Esters ◽

Reaction Products ◽

Isomer Separation ◽

Metathesis Reaction ◽

Polydimethyl Siloxane ◽

Acid Esters

Abstract An ionic liquid (IL) 111 column was compared with other commonly employed stationary phases including polydimethyl siloxane and polyethylene glycol for the separation of fatty acid monomethyl and dimethyl esters. The fatty acid esters employed in this study were derived from metathesis reactions of vegetable oils both with and without olefins. The IL 111 column demonstrated enhanced performance compared with conventional columns for the separation of these esters. These advantages included significantly enhanced retention of dimethyl esters relative to monomethyl esters, excellent cis/trans isomer separation and the ability to analyze higher carbon number dimethyl esters. As a result, these columns are highly suited for the analysis of mixtures of mono- and dimethyl fatty acid esters found in lipid metathesis reaction products or to determine monofunctional impurities in samples of commercial dimethyl esters.

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