Prediction of the phase diagram of liquid–liquid phase separation during crystallization via a molecular mechanism study
Yanbo LiuJinbo OuyangXuemei WeiGuoqi YuHualiang ShenRunpu ShenXin ZhangWeiwei TangMingyang ChenKangli LiJunbo Gong
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Benzoic acid
Separation process
Two molecular print polymers (MIPs) which have specific molecule recognition ability to benzoic acid are synthesized with benzoic acid as template by molecular imprinting technique (MIT).The result shows that the in- teraction between benzoic acid and MAA is stronger than that of benzoic acid and AM,This has significant meaning in the application of MIT in the separation and enrichment of benzoic acid in complex samples.
Benzoic acid
Molecular imprinting
Molecular Recognition
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Benzoic acid ethyl was synthesized successfully with benzoic acid and ethanol as starting materials in the presence of catalyst 4-dimethylaminopyridine and 1,3-dicyclohexyl carbodiimide as dehydrating agent by refluxing.The factors to yield of benzoic acid ethyl ester had been discussed on proportion of benzoic acid,ethanol and 4-dimethylaminopyridine,and reacting time.Result demonstrated that the best condition for preparation of benzoic acid ethyl was that the proportion of benzoic acid ethanol,4-dimethyl aminopyridine and dicyclohexylcarbodiimide in amount was 1: 3: 0.08: 1.2 for 3 hours.
Benzoic acid
Carbodiimide
Ethyl ester
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Methods of recycling benzoic acid was studied from wastewater of preparing peroxide of tert-butyl benzoate.The optimum conditions for recycling benzoic acid are as follows: PH 3.0,the aging time 10 min and the temperature 10 ℃.After recrystallizing under these conditions,the purity of benzoic acid is above 99%.
Benzoic acid
Refining (metallurgy)
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Benzoic acid
Degradation
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Objective:To prepare compound benzoic acid gel and establish high-performance liquid-affinity chromatography for determining benzoic acid and salicylic acid in compound benzoic acid gel.Methods:Carbopol 940 was used as gel matrix to prepare the compound benzoic acid gel with routine method.The solid phase was ultrasphere ODS column(5μm,4.6 mm × 250 mm),and the mobile phase was methanol/water(40:60,v/v).The wave length was 227 nm.Results:The gel was stable.The average recovery rate and relative standard deviation were 100.31% and 1.10% for benzoic acid and 99.75% and 1.53% for salicylic acid.The linear ranges of benzoic acid and salicylic acid were 16 to 75 mg·L-1(r = 0.999 2) and 7.5 to 40 mg·L-1(r =0.999 0),respectively.Conclusion:The high-performance liquid-affinity chromatography established in this study is simple,rapid,and accurate.
Benzoic acid
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Benzoic acid
Tetrachloride
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【Objective】To verify whether the Xinjiang jujube contains benzoic acid.【Method】Through the analysis of benzoic acid content of jujube in different regions,of different varieties and maturities,it has been confirmed that jujube contains natural benzoate. 【Result】The differences of contents of benzoic acid Junzao in different regions were not significant( T-test); The analysis of the contents of benzoic acid of different varieties of jujubes( ANOVA) showed that the benzoic acid contaminations between Hetian date and gray jujube,Hami jujube was significantly different; However,there was not distinctive difference of benzoic acid contaminations between the gray dates and Hami jujube; the benzoic acid contaminations of different maturities Chun date were significantly different( ANOVA).【Conclusion】Synthetical analysis results of different regions,varieties and maturities confirmed that the Xinjiang jujube contains benzoic natural acid. The contents of benzoic acid were related to varieties and maturities. The contents of benzoic acid in Chun date were within the range of 74-95 mg / kg at 95% confidence level.
Benzoic acid
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The purity measurement result of benzoic acid determined by alkali titration according to HG 3-987—76 is higher than the real purity because of the inorganic acid that remains,when the benzoic acid is produced from soclium benzoate with excessive acid.A new method of acid titration adopting neutralization and adjusting pH is proposed to measure the purity of benzoic acid.The operation is easy and the result is accurate.
Benzoic acid
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Abstract Weanling barrows (n = 350; Line 200 × 400, DNA, Columbus, NE; initially 5.9 ± 0.04 kg) were used in a 38-day study to evaluate the effects of different benzoic acid feeding strategies on nursery growth performance. Pigs were randomly assigned to pens (5 pigs per pen) and pens were allotted to 1 of 5 dietary treatments with 14 pens per treatment. Dietary treatments were formulated to provide 0, 0.25, or 0.50% benzoic acid (VevoVitall, DSM Nutritional Products, Parsippany, NJ) at the expense of corn. Treatment 1 served as the control without benzoic acid throughout all three dietary phases. Treatment 2 included 0.50% benzoic acid throughout all three phases. Treatment 3 contained 0.50% benzoic acid for phase 1 and phase 2, and 0.25% benzoic acid in phase 3. Treatment 4 contained 0.50% benzoic acid for phase 1 and phase 2, but no benzoic acid in phase 3. Treatment 5 contained 0.50% benzoic acid in phase 1, 0.25% benzoic acid in phase 2, and no benzoic acid in phase 3. From d 0 to 10 (Phase 1), pigs fed 0.50% benzoic acid had increased (P < 0.05) ADG and G:F, and were heavier (P = 0.040) on d 10 than those fed the control diet (Table). From d 10 to 18 (Phase 2), pigs fed 0.50% benzoic acid had increased (P < 0.01) ADG compared with pigs fed either none or 0.25% benzoic acid, while pigs fed 0.25% benzoic acid had poorer (P < 0.001) feed efficiency compared with pigs fed none or 0.50% benzoic acid. From d 18 to 38 (Phase 3), pigs fed 0.50% and 0.25% benzoic acid had increased (P < 0.01) ADG and ADFI compared with pigs fed no benzoic acid. Overall, pigs fed 0.50% in the first two phases and 0.25% benzoic acid in the final phase had a greater (P < 0.05) ADG than pigs fed no benzoic acid through all three phases or pigs fed 0.50% in the first two phases and no benzoic acid in the final phase, with the other treatments intermediate. Additionally, pigs fed 0.50% in the first two phases and 0.25% benzoic acid in the final phase had improved (P < 0.05) G:F compared with pigs fed no benzoic acid throughout all three phases, pigs fed 0.50% in the first two phases and no benzoic acid in the third phase, or pigs fed 0.50%, 0.25%, and no benzoic acid. These data suggest that nursery pigs fed benzoic acid had improved growth performance. However, when the benzoic acid was removed from the diet before the end of the nursery phase, the pigs experienced a reduction in performance resulting in similar overall performance to the control diet without benzoic acid.
Benzoic acid
Weanling
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A total of 350 weanling barrows (DNA 200 × 400, DNA; initially 13.0 ± 0.08 lb) were used in a 38-d study to evaluate the effects of different benzoic acid feeding strategies on nursery growth performance and fecal dry matter. Pigs were randomly assigned to pens (5 pigs per pen) and pens were allotted to 1 of 5 dietary treatments with 14 pens per treatment. Diets were fed in 3 phases: phase 1 from weaning to d 10, phase 2 from d 10 to 18, and phase 3 from d 18 to 38. Dietary treatments were formulated to provide 0, 0.25, or 0.50% benzoic acid (VevoVitall, DSM Nutritional Products, Parsippany, NJ) added at the expense of corn. Treatment 1 served as the control without benzoic acid throughout all three dietary phases. Inversely, treatment 2 included 0.50% benzoic acid throughout all three phases. Treatment 3 contained 0.50% benzoic acid for phase 1 and phase 2, and 0.25% benzoic acid in phase 3. Treatment 4 contained 0.50% benzoic acid for phase 1 and phase 2, but no benzoic acid in phase 3. Finally, treatment 5 contained 0.50% benzoic acid in phase 1, 0.25% benzoic acid in phase 2, and no benzoic acid in phase 3. From d 0 to 10 (phase 1), pigs fed 0.50% benzoic acid had increased (P = 0.034) ADG, improved (P = 0.049) F/G, and were heavier (P = 0.040) on d 10 than those fed the control diet. From d 10 to 18 (phase 2), pigs fed 0.50% benzoic acid had increased (P < 0.01) ADG compared to pigs fed either none or 0.25% benzoic acid, while pigs fed 0.25% benzoic acid had poorer (P < 0.001) feed efficiency compared to pigs fed 0 or 0.50% benzoic acid. From d 18 to 38 (phase 3), pigs fed 0.50% and 0.25% benzoic acid had increased (P < 0.01) ADG and ADFI compared with pigs fed no benzoic acid. For the overall experimental period (d 0 to 38), pigs fed 0.50% in the first two phases and 0.25% benzoic acid in the final phase had a greater (P < 0.05) ADG than pigs fed no benzoic acid through all three phases, or pigs fed 0.50% in the first two phases and no benzoic acid in the final phase, with the other treatments intermediate. Additionally, pigs fed 0.50% in the first two phases and 0.25% benzoic acid in the final phase had improved (P < 0.05) F/G compared with pigs fed no benzoic acid throughout all three phases, pigs fed 0.50% in the first two phases and no benzoic acid in the third phase, or pigs fed 0.50%, 0.25%, and no benzoic acid, respectively. There was no evidence for differences (P > 0.10) in fecal DM among treatments for samples collected on d 10 or d 18. These data suggests that nursery pigs fed benzoic acid had improved growth performance compared to control pigs. However, when the benzoic acid was removed from the diet before the end of the nursery phase, the pigs experienced a reduction in performance which resulted in similar overall nursery performance to the control diet without benzoic acid.
Benzoic acid
Weanling
Feed additive
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