00099 Status of coal research: Solvent extraction

00099 Status of coal research: Solvent extraction

01 Solid fuels (transport, storage) Porosity of APCS coals: The accessible naturs of 95/00089 coal In the presence of swelling solvents Kispert, L. D...

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01 Solid fuels (transport, storage) Porosity of APCS coals: The accessible naturs of 95/00089 coal In the presence of swelling solvents Kispert, L. D. et al., Prepr. Pap.-Am.Chem. Sot., Div. Fuel Chem., 1994, 39, (l), 54-58.

Discusses the current status of spectroscopic techniques used to study the porous structure of coal, with emphasis placed on the recent application of EPR spin probe method to the study of Argonne Premium coal samples. Reports that the spin probe method has provided valuable insight into micropore size and shape characteristics during the swelling process. Progress toward the desulfurlzatlon of OrganlC Coal 95/00089 molecules ;;22 L. M. Prepr. Pap.-Am. Chem. Sot., Div. Fuel Chem., 1994,39, (l), Discusses the character of organic sulphur compounds in coal and strategies for their removal. 95/q0090

Pulverlzatlon-separatlon of macromolecules of coal Funakoshi, 1. (Assigned to) Funakoshi Izumi, JAP. Pat. JP.O6,128,574, May 1994. Describes a pulverization-separation process which comprises: crushing the coal particles by a first rotary mill and pulverizing aromatic macromoles of the coal by a high-speed shearing machine with sharpedged blades in the rotation directIon with liquid (water, methanol, etc.) or medium (steam) in the vessel for selective pulverization. 95lOOO91 The pulverizing behavlor of coals In organic solvents Sakaki, T. et al., Funtai Kogaku Kaishi, 1994, 31, (S), 338-341. (In Japanese) The pulverizing behaviour of coals in organic solvents has been studied by a homogenizer-type pulverizer. Relation between the proprrtlrs of low-rank coals 9SlOOO92 heat-treated and the compressive strenath of the brlauettes Li. D. et al.. Meitan Zhuanhua. 1994. 17. (21 31-36. IIn Chinese) D&cusses th; properties of the ldw-ra& heai-t&cd coals and the effects of such treatment on compressive strength of briquettes from the coals ohserved.


The Rhelnbraun-WTA-d In trchnlque. Development and first operating results withr! heRITA-test plant Klutz, H. J. et al., Braunkohle Bergbautech., 1994, 46, (a), 4-11. (In German) With the WTA-process (fluidized-bed drvina of brown coal with internal waste heat utilizition), anew drying tech&q;e was developed, the distinctive features of which are a high energy efficiency and a specific ecological comnatibilitv. Role of collector and frother, and of hydrophobic95lOOO94 ityloleophilicity of pyrite on the separatlon of pyrite from coal by flotation Liu, D. and Somasundaran, P. Int. J. Miner. Process., 1994, 41, (3), 227-238.

95/00099 Statlitlcrl analysis of the performancs of a selec. tlve agglomeration process uslng n-heptane as sgglommnt Kim, S. S. er al., Coal Preparation, 1994, 15, (l), 51-70. The effects of agglomerated weight ratio (ACR), grinding time, slurry pH, and agglomeration time on the performances of a selective a omeration process using n-heptane as agglomerant were investigated ford pper Freeport and Pittsburgh No.8 coals. The experimental conditions were selected following a statistical central composite design. Statistical regression models including inverse terms were developed to predict the prqcess performances using the various operating variables. The response surfaces constructed-with these modeis showed that the Btu recovery for the two coalswas generally poor when the ACR was less than 0.2. It was also shown that high slurry pH improved both the ash and inorganic sulphur rejections for the two coals. 95/ooo99

Status of coal research: Solvent rxtractlon Buchanan, D. H. Prepr. Pap.-Am. Chem. Sot. Div., Div. Fuel Chem., 1994, 39, (l), 64-68. The paper discusses coal extraction, focusing on improvement on extraction yield or selectivity, correlation of solvent swelling and extraction behaviour to structural models for the insoluble organic portion of coal, analysis of extractions to identify and quantify organic compounds in the raw coal, and use of solvent extraction to predict or influence coal behaviour in a separate coal process. 95lOOI00 Studies on the dlsprrslon by mlcroorganlsm and shear flocculation of fine pyrite Chae,Y. B. Han’guk Chawon Konghak Hoechi, 1994,31, (I), 33-40. (In Korean) Describes the flocculation effects of the fine pyrite over a wide ran e of impeller speed and time. The turbulence was generated by a six %lade turbine impeller in a fully baffled fermenter. The fine oarticles were aggreRated bv &tation onlv- and the flocculation effect; were increaseTbv idding ihe collector or’9 K medium. The study deals with the dispersion effect of the aggregated pyrite by conditioning with microorganism. 95/00101 A study on the coal pre aratlon of bltumlnous coals from Prlmorsky and Urgalsky In 0 lberla Ahn, J. Y. et al., Han’guk Chawon Konghak Hoechi, 1994, 31, (2), 142-149. (In Korean) An optimal method was developed for domestic preparation of imported Primorsky and Urgalsky (Siberian) bituminous coals, by performing textural and mineralogical analysis, screening tests, and float-sink tests. 95lOO102

Taybrlte’s cleanflame

Solid Fuel & Fireplaces, Nov. 1994, (103), p. 11.

Cleanflame, a genuinely multi fuel an&a&e briquette, has been launched by Taybrite, part of Ryan, Britain’s biggest open cast miner and one of the companies bidding for part of British Coal.

The paper discusses the effect of dodecane and three different alcohol frothers on the flotation separation of pyrite from Pittsburgh No. 8 coal.

Transport, Storage


ss/oor 03 Antlfreeze composltlons and uses Latt, J. A. and Kizer, D. V. (Assigned to) Kizer Industries Inc., CAN. Pat.

Role of pH and dissolved mlneral species In Plttsburgh No. 9 coal flotation system - 1. Floatability of coal Liu, D. et al., Int. J.Miner. Process., 1994, 41, (3), 201-214. The paper discusses the role of pH and of dissolved mineral species on the floatability of Pittsburgh No. 8 coal. Role of pH and dissolved mineral species in Pltts95100096 burgh No. 9 coal flotatlon system - II. Separatlon of pyrite and non-pyrite minerals from coal Liu, D. et al., Int. J. Miner. Process., 1994, 41, (3), 215-225. The role of pH and of dissolved mineral species on the separation of pyrite and non-pyritic minerals from Pittsburgh No. 8 coal by flotation is discussed. 95100097

Solublllzatlon of coal by a treatment wlth butylzlnc compounds under mild condltlons. Active soecles In a zlnc’ butyl Iodide system for coal solublllzatlon Yoneyama, Y. et al., Bull. Chem. Sot. Jpn., 1994, 67, (71, 1941-1946. To elucidate the effectiveness of coal treatment with butylzmc compounds on coal solubilization, Yubari coal was treated with Bu Zn and/or BuZnX (X = Cl, Br I) in the presence or absence of alkyl halide (RX). Both treatments u6ing Bu,Zn or BuZnI and that with a combination of Bu Zn and RX (X = Cl, Br) were not very effective for coal solubilizatfon, whereas the combination of Bu,Zn, BuZnX (X = Cl, Br, I) and BuX (X = Cl, Br, I) was very effective.

CA.2,106,804, Mar. 1994.

This invention relates to antifreeze multi-component compositions which are combined substantially simultaneous with their application to target surfaces. The components are sprayed onto the intended surface and mixed together in the presence of ptissitrized air to produce a gel which will adhere to the surface being coated and react to form a resilient coating. Uses for the composition of this invention include coating aircraft parts such as wings to prevent or remove icing while the plane awaits takeoff. Other uses for the tailored compositions of this invention include coating the inside of the railroad cars and trucks used for carrying such materials as coal and mineral ores. 9SlOOI04 Chlna’s 500-mile plpellne Coal, Oct. 1994, 99, (lo), p. 98. Reports that an international consortium led by Pittsburgh-based Custom and Australian-based MRI Ltd, a subsidiary of the China Coa’s “OXoldmgs Group, signed a cooperative venture agreement with the Strategic Chinese government to construct an $888.6 million coal slurry ipeline in China. The SOO-milelong underground pipeline will run from tKe interior Chinese province of Shanxi to the coastal province of Shandong. It will be the world’s longest and largest underground pipeline when completed in late 1997. The project will also include construction and operation of coal cleaning and port facilities.

Fuel snd Energy Abstracts January 1995 7