Infared Absorption Spectrum for 1,2,3,4-Tetramethylbenzene

Launer, Philip J.; McCaulay, D

doi:10.1021/ac60060a047

Cited by 9 publications

(4 citation statements)

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“…4). According to Launer and McCaulay, 22 the adsorption band of 846.78 cm −1 was attributed to a 1,2,4,6‐tetrasubstituted absorption band of the benzene ring, indicating that the coordination site should be a hydrogen atom on the benzene ring in this stage. It can also be observed that the coordination reaction would not continue even if excess creosol was added.…”

Section: Resultsmentioning

confidence: 91%

“…Three absorption bands of 809.86, 846.78 and 873.34 cm −1 representing benzene ring substitution adsorption bands were detected in the spectrum of Prod-S3 (Table S1). 22,23 The 809.86 and 873.34 cm −1 absorption bands represent 1,2,4-trisubstituted benzene rings non-planar variable-angle vibration γ (=CH) , which are also 1,2,3,4-tetra-substituted singlets. This indicates that the H C was likely to be a coordination site (Fig.…”

Section: Ftir Analysismentioning

confidence: 99%

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Purification of creosol applying green heterogeneous extraction technology

Yin

Chen

Wang

2022

J of Chemical Tech & Biotech

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BACKGROUND: Cresol is an important industrial raw material, which is mainly derived from lignocellulosic biomass. High-purity creosol can significantly improve the quality of its downstream product. The extraction of creosol with ultra-high purity (>99.5%) and low cost has attracted extensive attention in recent years. A new and simple green heterogeneous extraction technology for separating ultra-high-purity creosol is proposed in this paper.RESULTS: When a certain amount of creosol is gradually dripped into Ca 2+ solution, the chemicals in three reaction stages are successively monitored by in situ Fourier transform infrared spectroscopy. The molar ratio of creosol and Ca 2+ in the endproduct of this reaction reaches four. Three different chemical bonds in three reaction stages are successively monitored: ion bond, coordination bond formed by ionic compound, and coordination bond formed by creosol molecule. This collected end-product can be decomposed easily. The vapors released in this decomposed process is determined to be high-purity creosol. Meanwhile, the molar ratio of creosol to Ca 2+ in the residual solid after decomposition of the end-product reduces to two.CONCLUSION: Based on the reaction mechanism between Ca 2+ and creosol, a new route for the separation and purification of creosol was proposed in this study. The creosol extraction rate reached 91.5% when excessive Ca 2+ solution was added to the creosol solution. The purity of creosol reaches up to 99.7% when the end-product of the reaction between Ca 2+ and creosol is decomposed at 170 °C.

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Section: Resultsmentioning

confidence: 91%

Section: Ftir Analysismentioning

confidence: 99%

Purification of creosol applying green heterogeneous extraction technology

Yin

Chen

Wang

2022

J of Chemical Tech & Biotech

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“…Qualitative studies on various types of compounds and on individual compounds include substituted acetamide (ISO,194,330,414), acetyl acetonates (156), acetylene and substituted acetylene (480,541), acids including substituted and long-chain types (S3, 197, 204, 211, 239, 299, 555, 556), acridines (546), alcohols (44,244,259,264,472,575,654), allenic compounds (650), aluminum soaps (254), amino acids (207,220), aryl deuterium (596), ascorbic acid (632), asparagine (131), substituted benzene (342,407), barbiturates (505,606), butadienes (583), carbinols (44), chromatographed samples on filter paper (SO, 276), citronellol (635), coals and coal products (91,208,227), cosmetics (99), organic cyanides and isocyanides (316,594), cyclohexane derivatives (215,336), cyclo-octyne (52), cytidine phosphates (257), cytosine (570), decalols (129), detergents (528), dextrans '(88), dicyclohexyl (215), diketones ( 22), enantiomorphs (168), esters (197, 207, 347, 555, 556), nitrate esters (825), substituted ethane (553) and substituted ethylene (387), fats (345, S46), flavones (265), fluorine metallic compounds (67), geraniol…”

Section: Qualitative Analysismentioning

confidence: 99%