All issues
Successor
Volume 38, Issue 2
Displaying 1-11 of 11 articles from this issue
- |<
- <
- 1
- >
- >|
-
[in Japanese]1959 Volume 38 Issue 2 Pages 63
Published: January 20, 1959
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (241K) -
Yoshio Tanaka, Osamu Uemura1959 Volume 38 Issue 2 Pages 64-68
Published: February 20, 1959
Released on J-STAGE: February 23, 2011
JOURNAL FREE ACCESSIt is now planned to establish the USIMINAS Iron and Steel Works in Ipatinga, Minas Gerais, Brazil. Coke oven and by-product recovery plants which will be constructed in this works are briefly explained in this paper. Main Plants are a coke oven of 50 ovens ×2 batteries, an ammonia sulphate recovery plant of 30t/day, benzol recovery and distillation plants of 40t/day and a coal tar distillation plant of 150t/day.View full abstractDownload PDF (716K) -
The Relation among C, H and OTomijiro Murata1959 Volume 38 Issue 2 Pages 69-85
Published: February 20, 1959
Released on J-STAGE: October 21, 2011
JOURNAL FREE ACCESSThe reporter has collected as many kinds of coals as possible from all over the world, and has studied them statisticaly so as to get the useful data about thelassification of coals, their constitution and their coalfification processes. In this first report, the reporter, having serected the analytical values specially of carbon, hydrogen and oxygen content, is to conclude or to deduce in respect of the relation among them as follows:
(I) Each group of coals assorted according to thier mining localities and their geological conditions has its own H/C-O/C coal band, but the point of refraction is clearly seen when 1/100 is in the vicinity of 5 to 7, without exception.
(II) In contrast to carboniferous coal, the tertiary coal in Japan is rather highly hydrogenous, whereas the reverse is the case with the Jurassic coal in the mainland China.However, these are not always controlled by the geological age to which their beds belong, for the coal band of the tertiary coal along the west coast of North America is in accord with that of the carboniferous coal in the low oxygen part.
(III) If the dispersien range of the analyticl values of each coalfield is encircled, the upper part of the circle, forming almost like a normal line (Bold line in Fig. 13), faces a certain point in the upper right hand of the line graph in many cases.
(IV) Though van Krevelen's report shows that the maximum value of H/C is on a certain point (the refraction point) in the coal band (O/C-H/C), it has no special significance.As van Krevelen failed to collect such Kinds of coals as have a little higher values of O/C, only the upper part of the circle as mentioned above (III) happened to prove the maximum of the coal band. In the other groups of coals, the maximum points of H/C slip off. And, if the analytical values in respect of O/C are universally collected, the maximum point never appears in the graph.View full abstractDownload PDF (2028K) -
Conversion of COOK-group of Humic Acid.Shigeru Kajiyama, Chikao Yokokawa, Yoshihisa Watanabe, Yoshinobu Takeg ...1959 Volume 38 Issue 2 Pages 86-97
Published: January 20, 1959
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe behaviour of humic acid obtained from coal is affected by its oxygencontaining functional groups, especially carboxylicgroup.The carboxylic group of the humic acid (obtained from Onoura bituminous coal by oxidation with 1N-HNO3) was converted into other various functional groups, and discussed about these conversion processes and properties of the obtained derivatives.
In the first series, the expected reactions occured smoothly, and the content of etherlinkage was estimated. In the second series, the acid chlorid (Hm) (OCH3) (COCl) was obtained in good yield, however, the subsequent conversions were incomplete. It is supposed that these low yields are caused by complex chemical structure of the humic acid.
Then, the rational formula of the humic acid and the solubility of some derivatives were discussed.View full abstractDownload PDF (1600K) -
Shuya Fujii, Fujiko Yokoyama1959 Volume 38 Issue 2 Pages 98-106
Published: February 20, 1959
Released on J-STAGE: October 21, 2011
JOURNAL FREE ACCESSThe results are reported of the spectra of oxidized coal in air at 150, for known periods of time up to 235 hours, and the elementary analysis of it .We conclude as follows from these data.1. On this oxidation condition, the oxidizing reaction is mainly RCH-RCOOH.2. An absorption peak at 6.25u is assigned not only to but also tooxygen; and on the oxidized coal, this peak is assigned almost to oxygen.3. Aliphatic CH hydrogen decreases with oxidation, but becomes almost constant over 150 hrs. At that time the content of aliphatic CH hydrogen is about 40 percent of the original one. This hydrogen can be considered as the stable hydrogen, which is resistant to oxidation, such as cyclo paraffinic hydrogen.4. Hydroxyl group is almost constant until 24 hours, but after that increases with oxidation from that time on.5. Carbonyl group (mainly carboxyl) increases with oxidation almost straight line .View full abstractDownload PDF (1038K) -
Tsuneo Isobe1959 Volume 38 Issue 2 Pages 107-116
Published: January 20, 1959
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSvarious experiments have been carried out on the main coals used for the coke manufacture. Then, the fiive coals, Yamano coal (weak caking coal), Futago and Hashima.coal (expansive caking bituminous coal), Yatake and Americancoal (strongly caking coal), were picked up from them, and the comparison tests weremade on these coals for various items about a-compound, A-compound and 2-compoundwhich were separated by extraction with pyridine and chloroform.It was clarified by the results of these studies that the characteristic properties of thecoal vary continuously in due order of the degree of coalification and these tendenciesare seen in all of each compound. From these facts, it is concluded that the propertieswhich control the aggulutinativity of coals are not some special components, but theamounts and quality ofalpha-, beta-and gamma-compounds. Therefore, the author think that thecaking coals have to possess the following three important properties: 1) The coal contains the suitable amount of r-compound, and its melting point israther high and the amounts of decomposition below the melting temperature iscomparatively small.2) Oxygen content of A-compound is low and its miscell-bond is weak .3) Amount of gas generation from the a-compound is comparatively small.View full abstractDownload PDF (1351K) -
1959 Volume 38 Issue 2 Pages 118-120
Published: January 20, 1959
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (440K) -
1959 Volume 38 Issue 2 Pages 120
Published: January 20, 1959
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (143K) -
1959 Volume 38 Issue 2 Pages 121-124
Published: January 20, 1959
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (579K) -
1959 Volume 38 Issue 2 Pages 124-126
Published: January 20, 1959
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (528K) -
1959 Volume 38 Issue 2 Pages 117-118
Published: February 20, 1959
Released on J-STAGE: May 16, 2013
JOURNAL FREE ACCESSDownload PDF (324K)
- |<
- <
- 1
- >
- >|