Dimethyl-2,2-hexane

Commonly used solvents inclnde liqnid carbon dioxide, propane, bntane, light oil, triethy-lamine, acetone, methanol, hexane, dimethyl ether, cmde oil, benzene, isopropyl ether, toluene, tricresyl phosphate, methyl isobutyl ketone, methyl chloride, and bntyl acetate. In addition to remediation uses, solvent extraction has been applied in a variety of indnstries, including food processing, pharmaceuticals, fine chemicals, and mining and minerals processing. 

Methyl hexane Dimethyl pentane Monomethyl C7+ Dimethyl C6. Normal C8 ... 

The class was comprised of carbon dioxide with aromatics ketones and carbon tetrachloride as solutes and aliphatics (propane, hexane, dimethyl butane), sulfur hexafluoride, and chlorotrifluoromethane as solvents with aromatics as solutes. In addition, sulfur hexafluoride combined with carbon tetrachloride, and chlorotrifluoromethane combined with 2-propanone were included in that class. In all cases, X = (1 + Vc /Vc r )V l + Ma/Mb) was in the range of 1 to 10. 

The stability of a SILM based on [bmim ][BF ] supported in a nylon membrane has been also analysed in other organic solvents, such as n-hexane//eri-butyl methyl ether and n-hexane/dimethyl sulphoxide [29]. The SEM-EDX study of the membranes after continnons operation showed that the stability of the supported liquid membrane increases with the decrease of the polarity of the solvent used. 

There are a number of solvents that can be used to prepare solutions for NIR measurements. Carbon tetrachloride and carbon disulfide are transparent over the entire NIR range. Many other organic solvents are transparent up to 2200 nm, with only a short region between 1700 and 1800 nm obscured by the solvent. Solvents as varied as acetonitrile, hexane, dimethyl sulfoxide (DMSO), and dibutyl ether fit into this category. Methylene chloride and chloroform can be used up to 2600 nm, with short gaps at about 1700 and 2300 nm. 

Hexanal n-Hexanal. See Hexanal Hexanal diethyl acetal CAS 3658-93-3 EINECS/ELINCS 222-911-4 Synonyms 1,1-Diethoxyhexane Properties Flash pt. (CC) 50 C Toxicology TSCA listed Uses Fragrance in cosmetics flavor Manuf./Distrib. Grau Aromatics http //www.grau-aromatics.de Hexanal dimethyl acetal CAS 1599-47-9 EINECS/ELINCS 216-488-5 UN 1993... 

Acetaldehyde dipropyl acetal Butyraldehyde diethyl acetal Capryl glycol Di-t-butyl peroxide Dimethyl hexanediol Ethylene glycol hexyl ether Ethyl hexanediol Hexanal dimethyl acetal... 

A mixture of 0.10 mol of freshly distilled 3-methyl-3-chloro-l-butyne (see Chapter VIII-3, Exp. 5) and 170 ml of dry diethyl ether was cooled to -100°C and 0.10 mol of butyllithium in about 70 ml of hexane was added at this temperature in 10 min. Five minutes later 0.10 mol of dimethyl disulfide was introduced within 1 min with cooling betv/een -100 and -90°C. The cooling bath vjas subsequently removed and the temperature was allowed to rise. Above -25°C the clear light--brown solution became turbid and later a white precipitate was formed. When the temperature had reached lO C, the reaction mixture was hydrolyzed by addition of 200 ml of water. The organic layer and one ethereal extract were dried over potassium carbonate and subsequently concentrated in a water-pump vacuum (bath... 

A solution of 0.22 mol of butyllithium in 150 ml of hexane was cooled below -40°C and 140 ml of dry THF were added. Subsequently 0.20 mol of 1-dimethyl amino--4-methoxy-2-butyne (see Chapter V, Exp. 14) were added in 10 min with cooling between -35 and -45°C. After an additional 15 min 100 ml of an aqueous solution of 25 g of ammonium chloride were added with vigorous stirring. After separation of the layers four extractions with diethyl ether were carried out. The solutions were dried over potassium carbonate and then concentrated in a water-pump vacuum. Distillation of the residue gave a mixture of 8-10% of starting compound and 90-92% of the allenic ether, b.p. 50°C/12 mmHg, n 1.4648, in 82% yield (note 1). 

A solution of l,3-dimethyl-5-methoxyindole (4.5 g, 0.026 mol) in DMSO (27 ml) was maintained at as cone. HCl (23 ml, 0.77 mol) was added dropwise over 15 min. Stirring was continued for 3 h at room temperature and the reaction mixture was then poured into ice-watcr (100 ml). The mixture was neutralized vvith NaHCOj to pH 7 and extracted with EtOAc (100 ml x 2). The EtOAc was removed in vacuo and the residue purified by chromatography on silica using hexane-EtOAc (7 3) for elution. The yield was 4.35 g (88%). 

Fig. 3.24 Test of the tensile strength hysteresis of hysteresis (Everett and Burgess ). TjT, is plotted against — Tq/Po where is the critical temperature and p.. the critical pressure, of the bulk adsorptive Tq is the tensile strength calculated from the lower closure point of the hysteresis loop. C), benzene O. xenon , 2-2 dimethyl benzene . nitrogen , 2,2,4-trimethylpentane , carbon dioxide 4 n-hexane. The lowest line was calculated from the van der Waals equation, the middle line from the van der Waals equation as modified by Guggenheim, and the upper line from the Berthelot equation. (Courtesy Everett.)...

Fig. 4.24 Heat of immersion of a carbon (prepared by pyrolysis of Saran Polymer A) in different liquids at 300 K. The liquids for points 1-6 were (I) methanol (2) benzene (3) n-hexane (4) 3-methyl benzene (5) 2,2-dimethyl butane (6) 2,2,4-trimethyl pentane. The abscissae represent the molar volumes of the liquids. (Redrawn from the original diagram of Barton, Beswick and Harrison. " )...

Some fabrication processes, such as continuous panel processes, are mn at elevated temperatures to improve productivity. Dual-catalyst systems are commonly used to initiate a controlled rapid gel and then a fast cure to complete the cross-linking reaction. Cumene hydroperoxide initiated at 50°C with benzyl trimethyl ammonium hydroxide and copper naphthenate in combination with tert-huty octoate are preferred for panel products. Other heat-initiated catalysts, such as lauroyl peroxide and tert-huty perbenzoate, are optional systems. Eor higher temperature mol ding processes such as pultmsion or matched metal die mol ding at temperatures of 150°C, dual-catalyst systems are usually employed based on /-butyl perbenzoate and 2,5-dimethyl-2,5-di-2-ethyIhexanoylperoxy-hexane (Table 6). 

Dimethyl cycle hexane 62 CsHi, n-Pentane 5 C5H1,... 

N-(Thexyl dimethylsilyl)dimethylamine (N-[2,3-dimethyl-2-butyl]dimethylsilyl dimethyl-amine) [81484-86-8] M 187.4, b 156-160°/720mm. Dissolve in hexane, filter, evaporate and distil. Colourless oil extremely sensitive to humidity. It is best to store small quatities in sealed ampoules after distillation. For estimation of purity crush an ampoule in excess O.IN HCl and titrate the excess acid with O.IM NaOH using methyl red as indicator. [Helv Chim Acta 67 2128 1984.]... 

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