Category: 18891-13-9

Advanced treatment of wet-spun acrylic fiber manufacturing wastewater using three-dimensional electrochemical oxidation was written by Zheng, Tianlong;Wang, Qunhui;Shi, Zhining;Fang, Yue;Shi, Shanshan;Wang, Juan;Wu, Chuanfu. And the article was included in Journal of Environmental Sciences (Beijing, China) in 2016.COA of Formula: C9H16O4 The following contents are mentioned in the article:

A three-dimensional electrochem. oxidation (3D-EC) reactor with introduction of activated carbon (AC) as particle micro-electrodes was applied for the advanced treatment of secondary wastewater effluent of a wet-spun acrylic fiber manufacturing plant. Under the optimized conditions (c.d. of 500 A/m², circulation rate of 5 mL/min, AC dosage of 50 g, and chloride concentration of 1.0 g/L), the average removal efficiencies of COD (COD_cry), NH₃-N, total organic carbon (TOC), and UV absorption at 254 nm (UV₂₅₄) of the 3D-EC reactor were 64.5%, 60.8%, 46.4%, and 64.8%, resp.; while the corresponding effluent concentrations of COD_cry, NH₃-N, TOC, and UV₂₅₄ were 76.6, 20.1, and 42.5 mg/L, and 0.08 Abs/cm, resp. The effluent concentration of COD_cry was less than 100 mg/L, which showed that the treated wastewater satisfied the demand of the integrated wastewater discharge standard (GB 8978-1996). The 3D-EC process remarkably improved the treatment efficiencies with synergistic effects for COD_cry, NH₃-N, TOC, and UV₂₅₄ during the stable stage of 44.5%, 38.8%, 27.2%, and 10.9%, resp., as compared with the sum of the efficiencies of a two-dimensional electrochem. oxidation (2D-EC) reactor and an AC adsorption process, which was ascribed to the numerous micro-electrodes of AC in the 3D-EC reactor. Gas chromatog. mass spectrometry (GC-MS) anal. revealed that electrochem. treatment did not generate more toxic organics, and it was proved that the increase in acute biotoxicity was caused primarily by the production of free chlorine. This study involved multiple reactions and reactants, such as Ethyl methyl adipate (cas: 18891-13-9COA of Formula: C9H16O4).

Ethyl methyl adipate (cas: 18891-13-9) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. COA of Formula: C9H16O4

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Microbubble enhanced ozonation process for advanced treatment of wastewater produced in acrylic fiber manufacturing industry was written by Zheng, Tianlong;Wang, Qunhui;Zhang, Tao;Shi, Zhining;Tian, Yanli;Shi, Shanshan;Smale, Nicholas;Wang, Juan. And the article was included in Journal of Hazardous Materials in 2015.Reference of 18891-13-9 The following contents are mentioned in the article:

This work investigated microbubble-ozonation for the treatment of a refractory wet-spun acrylic fiber wastewater in comparison to macrobubble-ozonation. COD_cr, NH₃-N, and UV₂₅₄ of the wastewater were removed by 42%, 21%, and 42%, resp. in the microbubble-ozonation, being 25%, 9%, and 35% higher than the removal rates achieved by macrobubble-ozonation at the same ozone dose. The microbubbles (with average diameter of 45 μm) had a high concentration of 3.9 × 10⁵ counts/mL at a gas flow rate of 0.5 L/min. The gas holdup, total ozone mass-transfer coefficient, and average ozone utilization efficiency in the microbubble-ozonation were 6.6, 2.2, and 1.5 times higher than those of the macrobubble-ozonation. Greater generation of hydroxyl radicals and a higher zeta potential of the bubbles were also observed in the microbubble ozonation process. The biodegradability of the wastewater was also significantly improved by microbubble-ozonation, which was ascribed to the enhanced degradation of alkanes, aromatic compounds, and the many other bio-refractory organic compounds in the wastewater. Microbubble-ozonation can thus be a more effective treatment process than traditional macrobubble-ozonation for refractory wastewater produced by the acrylic fiber manufacturing industry. This study involved multiple reactions and reactants, such as Ethyl methyl adipate (cas: 18891-13-9Reference of 18891-13-9).

Ethyl methyl adipate (cas: 18891-13-9) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Reference of 18891-13-9

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Evaluation of press mud, vinasse powder and extraction sludge with ethanol in a pyrolysis process was written by Devia-Orjuela, John Steven;Alvarez-Pugliese, Christian E.;Donneys-Victoria, Dayana;Cabrales, Nilson Marriaga;Ho, Luz Edith Barba;Brem, Balazs;Sauciuc, Anca;Gal, Emese;Espin, Douglas;Schichtel, Martin;Lang, Dimitrina;Giardinelli, Sebastiano;Briceno, Maria. And the article was included in Energies (Basel, Switzerland) in 2019.Application In Synthesis of Ethyl methyl adipate The following contents are mentioned in the article:

The effluents of the sugar and bio-ethanol industry, mainly vinasse as well as lignocellulosic waste, are produced in high volumes Therefore, their treatment and valorization would reduce the environmental impact and make this industry more productive and competitive. The purpose of this study was to determine the potential use of press mud (lignocellulosic waste), vinasse powder, and vinasse sludge from an extraction process with ethanol, as raw materials for conventional pyrolysis evaluating the physicochem. characteristics that affect this thermochem. process, such as calorific power, d., ash content, volatile material, moisture and nitrogen, sulfur, carbon and hydrogen content, thermogravimetric profile, and quantification of lignin cellulose and hemicellulose. The batch pyrolysis experiments showed that all three wastes could be converted successfully into more valuable products. The powder vinasse led to the formation of the lowest content of bio-char (42.7%), the highest production of volatiles (61.6 weight%), and the lowest ash content (20.5 weight%). Besides, it showed the high heating value of 15.63 MJ/kg. Meanwhile, the extraction sludge presented the highest liquid yield (32%) with the lowest gas formation (18.2 weight%) and the lowest heating value of 8.57 MJ/kg. Thus, the sludge could be a good feedstock for production of bio-oil and bio-char. This study involved multiple reactions and reactants, such as Ethyl methyl adipate (cas: 18891-13-9Application In Synthesis of Ethyl methyl adipate).

Ethyl methyl adipate (cas: 18891-13-9) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Application In Synthesis of Ethyl methyl adipate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Advanced treatment of acrylic fiber manufacturing wastewater with a combined microbubble-ozonation/ultraviolet irradiation process was written by Zheng, Tianlong;Zhang, Tao;Wang, Qunhui;Tian, Yanli;Shi, Zhining;Smale, Nicholas;Xu, Banghua. And the article was included in RSC Advances in 2015.Recommanded Product: 18891-13-9 The following contents are mentioned in the article:

This work investigated the effectiveness of a combination of microbubble-ozonation and UV irradiation for the treatment of secondary wastewater effluent of a wet-spun acrylic fiber manufacturing plant. Under reactor condition (ozone dosage of 48 mg L^-1, UV fluence rate of 90 mW cm^-2, initial pH of 8.0, and reaction time of 120 min), the biodegradability (represented as BOD₅/COD_cr) of the wastewater improved from 0.18 to 0.47. This improvement in biodegradability is related to the degradation of alkanes, aromatic compounds, and other bio-refractory organic compounds The combination of microbubble-ozonation and UV irradiation synergistically improved treatment efficiencies by 228%, 29%, and 142% for COD_cr, UV₂₅₄ removal and BOD₅/COD_cr resp. after 120 min reaction time, as compared with the sum efficiency of microbubble-ozonation alone and UV irradiation alone. Hydroxyl radical production in the microbubble-ozonation/UV process was about 1.8 times higher than the sum production in microbubble-ozonation alone and UV irradiation alone. The ozone decomposition rate in the combined process was about 4.1 times higher than that in microbubble-ozonation alone. The microbubble-ozonation/UV process could be a promising technique for the treatment of bio-refractory organics in the acrylic fiber manufacturing industry. This study involved multiple reactions and reactants, such as Ethyl methyl adipate (cas: 18891-13-9Recommanded Product: 18891-13-9).

Ethyl methyl adipate (cas: 18891-13-9) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Recommanded Product: 18891-13-9

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Oxidative breakdown of tetrachloro-o-benzoquinone with peroxyphthalic acid. Study of the oxidation products was written by Karrer, P.;Testa, E.. And the article was included in Helvetica Chimica Acta in 1949.Quality Control of Ethyl methyl adipate The following contents are mentioned in the article:

Tetrachloro-o-benzoquinone and o-HO₂CC₆H₄CO₃H give 30.5% tetrachloromuconic acid (I), m. 156.7掳 (di-Me ester, b₁₁ 135掳), and 3.5% 伪,尾,未-trichloro-纬-hydroxymuconic acid 纬-lactone (II), m. 182掳, gives a violet solution with NaHCO₃ (Me ester (III), from CH₂N₂, m. 107掳). The yield of II increases in prolonged reactions. Hydrolysis of both I and II gives a mixture of 伪,纬-dihydroxy-尾,未-dichloromuconic acid 纬-lactone (IV), m. 225掳 (decomposition), and 2,3,5-trichloro-4-oxo-2-pentenoic acid (V), m. 107掳 (Me ester, m. 86-7掳). The intermediate in the formation of V is probably 伪,尾,未-trichloro-纬-hydroxymuconic acid, whose keto form loses CO₂. Catalytic reduction of V gives EtCO₂H and BuCO₂H. V and Ca(OCl)₂ form (:CClCO₂H)₂ and CHCl₃. IV does not react with HIO₄ or AgNO₃. With CH₂N₂ it gives Me 伪-methoxy-尾,未-dichloro-纬-hydroxymuconate lactone (VI), m. 99.5-100掳. III in hot H₂O gives Me 伪,纬-dihydroxy-尾,未-dichloromuconate 纬-lactone (VII), m. 166.5-7掳. With CH₂N₂ VII gives VI. Refluxing VI with H₂O gives a compound, m. 167-8掳, which is a Me 伪-methoxydihydroxychloromuconate 纬-lactone, but the location of the free OH and the Cl groups is not determined The mother liquors contain some Me 伪-methoxy-尾,未-dichloro-纬-hydroxymuconate (VIII), m. 100-1掳, but VIII is better obtained from VI with NaOH in MeOH. Catalytic reduction of VIII with Pt in EtOH gives Et Me adipate, b₁₁ 115-20掳, and in H₂O it gives adipic acid. Reduction with Zn and EtOH-AcOH gives an oil which is probably Me 伪-methoxy-纬-hydroxy-伪,未-dihydromuconate. With CH₂N₂ this gives a compound, b₁₁ 125-30掳, probably the di-Me ester. This study involved multiple reactions and reactants, such as Ethyl methyl adipate (cas: 18891-13-9Quality Control of Ethyl methyl adipate).

Ethyl methyl adipate (cas: 18891-13-9) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Quality Control of Ethyl methyl adipate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Electrolysis of organic acids and decomposition of peroxides. IV. Thermal decomposition of symmetrical and unsymmetrical peroxides of dicarboxylic acids was written by Goldschmidt, Stefan;Dachs, Karl. And the article was included in Chemische Berichte in 1955.HPLC of Formula: 18891-13-9 The following contents are mentioned in the article:

ClCO(CH₂)₂CO₂Me (150 g.) and 40 g. NaOH in 250 cc. H₂O added to 220 cc. 15% H₂O₂ at 0° gives (MeO₂CCH₂CH₂CO)₂O₂ (I), m. 77° (decomposition). Bz₂O₂ (10 g.) in 600 cc. absolute Et₂O treated at -2° with a solution of 1.2 g. Na in 100 cc. 96% alc. and 70 cc. ice water and the mixture washed with Et₂O gives an aqueous solution of 4.7 g. (94.4%) BzO₂Na. A solution (70 cc.) of Na₂CO₃, saturated at 15° and cooled to 0°, treated with 4 cc. ClCO(CH₂)₂CO₂Me, then with the above solution of BzO₂Na, gives benzoyl 3-carbethoxypropionyl peroxide (II), oily liquid, decompose 69-70°. Similarly were prepared the following acyl benzoyl peroxides (acyl, decomposition temperature, and % yield given): EtO₂C(CH₂)₃CO (III), 76-8°, 92; EtO₂C(CH₂)₄CO (IV), 83°, 98; EtO₂C(CH₂)₅CO (V), 91°, -. Refluxing HO₂C(CH₂)₆CO₂H, in 5 mol alc. while the solution is treated with HCl gas gives EtO₂C(CH₂)₆CO₂Et, which with an equivalent amount of HO₂C(CH₂)₆CO₂H yields EtO₂C(CH₂)₆CO₂H, and with SOCl₂ gives EtO₂C(CH₂)₆COCl (VI). A diagram is given of the thermal. decomposition apparatus Heating 50.5 g. 98.9% I in 172 g. AcOH at 100° gives 6 g. MeO₂CEt, b. 79.5°, 160 g. AcOH, b. 117°, 3.5 g. MeO₂CCH₂CH₂OAc, b₁₉ 96-8°, 9.5 g. MeO₂C(CH₂)₄CO₂Me, b₁₉ 123-4°, and 10 g. MeO₂ CCH₂CH₂CO₂CH₂CH₂CO₂Me (VII), b_1.5 149-50°. Heating CH₂:CHCN in a sealed tube with concentrated HCl gives ClCH₂CH₂CO₂H, yielding with CH₂N₂ the Me ester, which, heated with AgO₂C(CH₂)₄CO₂Me, gives VII, b₁ 149°. The decomposition of the unsym. peroxides without a solvent produces, in each case, a small amount of BzOH (BzOMe, b₃₀ 89-91°) and 4-PhC₆H₄CO₂H, m. 219°. Heating 24.2 g. II without a solvent gives, in addition to the above, 1.15 mols. CO₂, 0.3 g. EtO₂CCH:CH₂, EtO₂C(CH₂)₄CO₂Et, b₃₀ 141°, and 17 g. (85%) EtO₂CCH₂CH₂OBz, b₁ 97-100°. Similarly, 26 g. III gives 0.4 g. EtO₂CCH₂CH:CH₂, b. 118° (amide, m. 72°), 0.3 g. EtO₂C(CH₂)₆CO₂Et, b₁₁ 141°, and 17.3 g. (79%) EtO₂C(CH₂)₃OBz (VIII), b₁ 103-6°. Treating VIII with alkali, acidifying, extracting, and heating the product 8 h. at 200° gives γ-butyrolactone (IX), b₃₀ 102°; acidification of the alk. solution yields BzOH, m. 122°. Heating 29.5 g. IV as above gives 1.13 mol CO₂, 0.4 g. EtO₂CCH₂CH₂CH:CH₂, b. 142-4°, 0.3 g. EtO₂C(CH₂)₈CO₂Et, b₁₂ 166°, and 19.7 g. BzO(CH₂)₄CO₂Et (X). Hydrolysis of X gives EtOH, BzOH, and δ-valerolactone, b₁₁ 110°. Heating 31 g. V gives 1.19 mol CO₂, 0.5 g. CH₂:CH(CH₂)₄CO₂Et (XI), b₃₀ 68°, 0.5 g. EtO₂C(CH₂)₁₂CO₂Et (XII), b_0.8 50°, and 22.4 g. (83%) BzO(CH₂)₆CO₂Et (XIII). Heating XIII with 4N KOH gives HO(CH₂)₆CO₂H as a sirup. Heating 26.7 g. IV in 580 g. Me₂NPh gives BuCO₂Et, b. 144°, 7.9 g. BzOMe, b₁₂ 90°, 8.1 g. EtO₂C(CH₂)₄CO₂Me, b₁₂ 123° [HO₂C(CH₂)₄CO₂H, m. 152°], 3.2 g. δ-valerolactone, b₁₄ 113°, BzOH, m. 122°, 90 g. Me₂NPh, and 11 g. (p-Me₂NC₆H₄)₂, m. 195°. This study involved multiple reactions and reactants, such as Ethyl methyl adipate (cas: 18891-13-9HPLC of Formula: 18891-13-9).

Ethyl methyl adipate (cas: 18891-13-9) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.HPLC of Formula: 18891-13-9

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics