Document jB1vjLk0ov7Opn8nQpQr1yvMN

SEP 13 2002 4:39 PM PR PLAINTIFF'S EXHIBIT SA-500 TO I 2145201181 P.03 BULLETIN 8CrEKTIFKUB. YOWGOSLAVIS - Tom* 1. 1, In 1$ thacenequinone) are, of couise, without any in fluence. Various other substances (e. &, dioxystilbene, asparagine, hdppurie acid) have been examined as well. From, those experiments the conclusion can be drawn that there would not be any special requirements, as to the presence of sulphur or a certain percentage of oxygen etc. in substances which should have coking properties. The latter chiefly depend on the pyrolytic behaviour of the individual substance. Nevertheless, their mecha nism of action does not seem to be a simply cementing one. Further experiments are being carried out. D. HAB2I, B. POPOVIC, M. SAMEC Chemical Institute, Academy, Ljubljana. Coal Institute, Academy, . Beograd INVESTIGATION ON THE MECHANISM OF THE COKINO 'PROCESS BV CHEMICAL CHANGE OF THE COAL SUBSTANCE The mechanism of producing coke from coal is a problem which has been studied by many scientists, in many laboratories, and for many yean. In this connexion, there are lots of sup positions about the process of producing coke, but not one which could completely explain the pro cess. All methods ere operating with a coal which is able of being coked. Many methods have been used' to determine the campcoeota which would give the coal the coking properties as well as to show an explanation of the links in the structure, and of the physical .properties of such a coal. In order to receive a suitable solution, we have carried out the experiments in a reverse sense. We took a non-coking coal as starting material, and tried, by means of adding known chemical ele ments, to bring it into a state in which it would coke under normal conditions, or to get a caking coal by. chemical treatment of the non-coking coat. XR both esses <the researches have yielded positive results. In the Coal Institute*, it has been tried to get from lignite, by treatment with a base of known concentration under low .pressure, a eoal-materM which does not coke only but fckso gives a mixture with colons properties when mixed to iaw lignite- The experiments carried out have started the fact that the concentration of the base, .the precipitation of the product from, the basic solution, and the pressure are of great im portance to the forming of cojd-mxtsrial which may coke. The coal-material -'formed under optimal conditions -gives .us, in the Bauer and Jenkner retort, aH the products we usually get from cotong-coal (benzene and naphthalene) in same larger quan tities), and -a well-baked coke with a silvery colour. It is stated that, in the process of change of lignite under the conditions Just described, a decarboxyla tion of the huminlc adds is taking place, whereby the number of the hydroxybe group* increases. Coal Institute, Academy, Beograd B. POPOVIC INVESTIGATION OF THE MECHANISM OF THE COKING PROCESS AT THE ADDITION OF CERTAIN CHEMICAL COMPOUNDS TO NON COKING COAL The determination of the components which give tha coal the oddnf properties Is a 'difficult tiring, chiefly -because of the complicated structure of coal. AS endeavours in that direction could not yield any satisfactory result*. Lota of expe riments have been carried out^ aiming to find out what terms and what chemicart compounds should he added *o non-coking coal to give the mix ture coking properties. All compounds, as far as they have any influence on the properties of coking, have been considered in this- respect The starting material was lignite, and semi coke of lignite, and compound* of the group of sugars and naphthaline, and the derivates of naph thaline. Investigations with dextrose, saccharose, dextrine, starch, sulphite, waste liquor and the hydrolysate of wood gave evidence of the fact that all these compounds give the coal coking properties, among which the sugars of the type of saccharose yield better results. lit is stated that lignin, resulting from the hydrolysis of wood, evokes coking. Negative results have been expe rienced with /^d-dinaphthaHne distriphon, excel-' lent results, on the other hand, hove been obtained with the product of pyrolysis of j3,j3-dinaphthalinesulphcn, from which the soluble perticlos arc eliminated with alcohol and ether. . B. FOFOVIC and ML-SAMEC Cod Institute, Academy, Beograd Chemical Institute, Academy, ' Ljubljana ' MINEEIALOCHE -- FBTROGBAFHTE LES dSEMENTS DE L'ASBESTE EN YOVGOSLAVTB Depuis plvsieurs anaAes Je pouxsuic les etu des mineralogiques, pdttogzaphlques et celles de gtntse de glsements de ehrysotiXe-asbeste lies i la serpentine et dCooaverts suxtaut aprfcs la der nier* guerre. Lea roches encaissantes sont reprfsentfes per des lherzolltes beaucoup plus serpentuaitAes au volslnage de I'amiant* qui s'est formde par la circulation des eaux thetmales suivant la failles, les fractures OU la fissures capillaires. Les RECEIVED TIME SEP. 13. 3:44PM PRINT TIME SEP. 13. 3:45PM SEP 13 2002 4:40 PM FR TO 12145201181 P.04 14 BULLETIN" SOISWTTXFWIE, YOUGOSLA.VIB -- Toro 1, No, I) 19*1 venues das eaux thermale* sent does das causes diffSrcntes. L'lg* da formation da gtsemeats est dlffirent, toujour* posterieur a la serpentine, et apparheot soit au Cretoce soit au Triass ou enfin au Tertiaire. Lea venues d'eaux thermales peuvent 4tre dOes aux intrusions granltique*, aux Apanchemcnts dec andiiit** et dacite* enfin aux meuvements tectoniques prodults par des cbevauohements de formations sedlmtntaires ou cmtallines sur las serpentines. Les giseineBts de la region de Kopaonlk (Korlat*. Bclce, DomiSevina, Borance) se sont fbnnAs au contact de* roches voicaniques et de serpentines. Lea giaements de DobrinlSte et de o Grades en MacAdolne torment une aureole autour de* intrusion* granitiques appartenant* au June* siqua. Lea gisements de Boanie (Petrovo Selo) se ' sont ionnvs au votsinage de l'intruslon de diaba' se3. Lea gisements de Rujlite, 2abore et PustenUc (region Kosovo) se sont dAveloppAs en forme de filons le long de contacts anocmaux avec le CrAtacA SupArieur. Dans cea lccaUtes on trouve des plus longs fibre* d'amiaote de tou* le* giaements connus en Yougoalavie. Le glsement de Bogoalcvac et de Sttrovica en MacAdolne sont formAs au con* tact des AcoiBes tectoniques avec shistes cristallins et serpentine*. De la mAro* fason se sont formAs la plupart de petits gisements ou daffleurements de I'asbeste en MacAdolne. Dan* tous ces rise* ments le* veinules de chrysotHe peuvent Atre disposAee de diffArentes f$ona: soit entreeroisoes, soit en couches paraUAles sAparAcs par des bandes de diffArentes largeun de serpentines sterile*. Le pourcentage de mineral par rapport aux stfaile* varie dans des larges limites. La longueur de fibre* varie Agalement da quelques millimetre* A plusieurs. centimetres. Le glMment- de Stragare d'un type tout A fait particulier, A im conalssance unique au nvonde par se richesse et la constitu tion mineralogique et tout A fait different des types prAcAdents. Le glsement de Stragare Vest formA au con tact anormal et de dAeoltaneot partid de calca( ires urgonlens et de lherxolites presque eatlArement serpentinisAes. La masse de minerals forme _ une Anorma lsntill* dans laquelle on trouve des ` blocs ou det morceaux de serpentine* arrondis ' par le mouvement de l&ninage, qul se.rApercute sur le mineral en lul donnant une texture shisteuse. Cest avec mon collAgue, M. fi. Stefanovid, que j'ai fait 1'Atude de ce mineral qui se prAsente en forme de cuir, da chiffons et de cordes de montagne dost las fibre* sont entrelacAs et cimentes par una masse onotueus* semblable au talc. La longueur do ce carton de montagne peut atteindre 1 znAtre et la largeur jusqu'au Idem. De Vanalyte chimlqua, de l'Atude thermique et par l'analyse aux rayons X; on voit que ce curieux minerai est constituA en majeure partle par le ohryaotile intimement mAlangfc et dmentA par la hydrottlcite et hydromagnAsita.auxquels s'ajoute une petite quantitA de serpentines friable*. Etaint donna las reserves Anomies de ce minerai ain$i que Je grand' pourcentage (prAa de 20 7S) de ebryjotile nous avons xepris, M. f>. StefwaoviA et moi l*s euals dtt aAparation dans les milieux aqueux de chrysotile de la ganguo en faisant agiter fortmant le melange d'eau et de mineral qui se desagrege aisea facilement an libenmt la majeure partie de matiArw talcueuse*. Four sAparer entiArement le cftiysotil* de la gangue nous poursui- vrons les assais de l'ultr&son dan* les milieux JLQUeUX. STOJAN FAVLOVlC L&bomtovrc it MinArslopic, Urivtrtlti, Beograd THE FREQUENCY OF TWDt TYPES IN QUARTZ CRYSTALS FROM VARIOUS LOCALITIES IN SERBIA The examination of quart* crystal* from various Serbian localities showed that the fre quency of twin type* varies from locality to loca lity and this must be a reflection on the geological environment. ILIJA KRSTANOVIC Deportment of Mjitraloov, Unlvtrtity, Beograd LTSTUDE PETROGRAPHIQUB DES ROCHES BASIQUES DB LA SERBZE ORIENTALS Dan* la Serbia Oriontale le plus grand mastif de* zoche* basiqua* * trouve dsns la region da D*U-Jov*n. D'aprAs les AxaminaKcns gAologique* et pAtrographiques cea roche* sont probablement de l'Age palAoxoIqua. - Au microscope Hauteur distingue le* inches suivantas: gabro i dialago sans olivine, gabxo A olivine, eufotida gabro, gabro. pAgmatitiqua, gabro a hyperstine, serpentines et diabases. Ce* roches sont trte altArAes. D'ordiakire la dialage est trans- formAe *n anipbibole (gabro ourolitl**>. Le plus Atcndu est gabro 4 dialaga sans olivine, puis gabro i olivine et eufotide gabro. Gabro pAgmatitzque et diabases se trouvenl comma let rochet filo- ntennes. . mxleSa FBTKOVIC Laboretotre at Nintralogii, Univertiti, Beograd. OOLITIC IRON OHE FORMATION OF SEDIMEN TARY ORIGIN IN SERBIA The mentioned formation is of a large regio nal appearance in Serbia. It may be followed from Belgrade through Middle and West Serbia down to the Sam mountain. The ferrous sediments: oblitic iron ore, sandstone and day, with the associated chert and limestone, belong to the Lo wer Cretaceous deposits {Barrfmien-Gault), or f .1 I RECEIVED TIME SEP. 13. 3:44PM PRINT TIME SEP. 13. 3:45PMtal page.84 **