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48 巻, 5 号
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コークス・センター構想について﨏 健吉1969 年 48 巻 5 号 p. 263
発行日: 1969/05/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (303K) -
前沢 昌武, 田中 芳雄1969 年 48 巻 5 号 p. 264-273
発行日: 1969/05/20
公開日: 2010/06/28
ジャーナル フリーPrevious studies on radiation from the flame in furnace are reviewed, and chiefly the contribution performed by both Special Research Comittee on Furnace Performance Factors orgainzed by ASME and International Flame Research Foundation at IJmuiden are discussed. One of the most important results on the experiments at IJmuiden is that the momentum of fuel jet has a remarkable effect upon the flame emissivity. Various attempts have been made related the absorption coefficient to the particle size and concentration. It is considered that the influence on scattering varies according to the parameter X=7rd/2, and radiative transfer in absorbing-scattering medium is a theme to which we must pay more attentions in future.抄録全体を表示PDF形式でダウンロード (1825K) -
昭和43年11月7日石炭科学会議特別講演相馬 純吉1969 年 48 巻 5 号 p. 274-285
発行日: 1969/05/20
公開日: 2010/06/28
ジャーナル フリーElements of Electron Spin Resonance (ESR) were introduced in order to describe that what kinds of information on coal are able to be obtained from the ESR spectra. An application of ESR to the heat treated polyacrylnitrile was presented as a model of the ESR study on coal. A brief survey on ESR studies of coal by the various researchers was performed and potential applications of ESR to coal study were mentioned.抄録全体を表示PDF形式でダウンロード (2080K) -
松原 睦哉, 佐々木 誠, 青村 和夫, 大塚 博1969 年 48 巻 5 号 p. 286-294
発行日: 1969/05/20
公開日: 2010/06/28
ジャーナル フリーCarboxylation of zso-butene with carbon monoxide and water to produce branched C5 acid (trimethyl acetic acid) as the main product was studied under various reaction conditions in the presence of concentrated sulfuric acid. The aim of this work was to observe the influence of reaction conditions, such as the catalyst acid concentration, and the amount of the catalyst, reaction temperature, the amount of the solvent (n-hexane) etc, on the yield of carboxylic acids.
High carbon monoxide pressure favored carboxylation between 10kg/cm2 and 50 kg/cm2, and the yield of carboxylic acids increased with the decrease of reaction temperature between 4 and 93°C
Carboxylation was predominant under the sulfuric acid concentration of 90% and higher. However, the yield of carboxylic acids decreased under the acid concentration of 98% and higher, presumably due to the lack of water in the reaction zone which is necessary to stabilize the carboxylated intermediates. Under the acid concentration below 93%, the produced carboxylic acids showed the increasing tendency to dissolve in n-hexane solvent with the decrease of the acid concentration.抄録全体を表示PDF形式でダウンロード (1338K) -
NMRによる泥炭フミン酸の構造解析岡 宏, 佐々木 満雄, 伊藤 光臣, 鈴木 章1969 年 48 巻 5 号 p. 295-302
発行日: 1969/05/20
公開日: 2010/06/28
ジャーナル フリーThe chemical structure of peat humic acids was estimated by means of nuclear magnetic resonance spectroscopic technique. The peat humic acid samples were prepared from extraction of Toyotomi moss peat, Ishikari reed peat and Kushiro reed peat with 1% sodium hydroxide, 3% sodium acetate and 1.8% sodium pyrophosphate aqueous solution. The NMR spectra were measured in deuteriodimethylsulfoxide with tetramethylsilane as an internal reference.
From the NMR data, it was found that the peat humic acids had lactone units in the molecules. The number of constitutive carbon, hydrogen and oxygen atoms contained in the various functional groups was obtained by elementary analyses and chemical analyses. By using these data, the structural parameters such as carbon aromaticity fa, substitution parameter of aromatic system σ, alkyl substitution parameter to aromatic ring σali and ratio of hydrogen to carbon in hypothetical unsubstituted aromatic material Haru/Car, as summarized in Table 3 were calculated.
It was concluded that in the peat humic acids, the ratio of aromatic carbon atoms to all carbons is about 50% and the acids have mainly mono-ring systems with a few of naphthalene units in the aromatic constitution. The ratios of benzene to naphthalene unit are about 2-3: 1 for Ishikari reed peat and 4-6: 1 for Toyotomi moss peat and Kushiro reed peat.抄録全体を表示PDF形式でダウンロード (1147K) -
赤外吸収スペクトル (1)大沢 祥拡, 杉村 秀彦, 藤井 修冶1969 年 48 巻 5 号 p. 303-309
発行日: 1969/05/20
公開日: 2011/10/21
ジャーナル フリーSome fundamental examinations were performed on the potassium bromide technique for the i. r. study of coal. The influences of grinding period and moisture content as well as applicability of the Lambert-Beer's law were examined and results were summarized as follows.
1. When Yubari coal (86.2%C) was used as a sample, grinding the coal sample with potassium bromide for one hour was found to be sufficient to obtain nearly const-ant optical densities for all absorption bands except at 3450cm-1.
2. The absorption band at 3450cm-1 assinged to hydroxyl group was apparently affected by moisture. Its optical density increased with time when a dried potassium bromide pellet was exposed to the air. The specific extinction coefficient, K (l/g·cm) of water was calculated to be 3. 58-3. 85 from the relation between the optical densities at 3450cm-4 and moisture content.
3. The Lambert-Beer's law was confirmed to be applicable to the coal samples, and the specific extinction coefficients were caclulated from the linear relationship between coal concentrations and optical densities for almost all absorption bands.抄録全体を表示PDF形式でダウンロード (1348K) -
1969 年 48 巻 5 号 p. 313-316
発行日: 1969/05/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (611K)
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