Abstract: A method for inhibiting dust formation while feeding coal into a coking chamber, comprising preheating coal and subsequently contacting the coal with an aqueous solution of 30-70% by weight of waste sulfite liquor in amounts of about 0.5 to 1.0 parts by weight of said solution per 1000 parts by weight of said coal.

Abstract: Coal is preheated and contacted with 0.5 to 3 percent by weight of moist coal tar, preferably bituminous coal tar. The thus-treated coal is admitted into a coke oven through the ceiling of the latter. The coal is poured into the coke oven, rather than being blown in, and is permitted to descend into the coke oven under the influence of gravity. Preferably, the coal is poured into the coke oven through at least two or three openings in the ceiling thereof. The coal tar serves to bind finely divided coal particles to the coarser particles and, in this manner, the development of dust during the introduction of the coal into the coke oven is restricted and, concomitantly, the danger of ignition or explosion is reduced.

Abstract: A process for preparing tetrachloropyrimidine comprising reacting 2-cyano-1,2-(dichlorovinyl)-isocyanide-dichloride of the formulaNC -- CCl = CCl -- N = CCl.sub.2with a Friedel-Crafts compound at an elevated temperature. The resulting tetrachloropyrimidine can be used as a reactive component for the preparation of reactive dyestuffs.

Abstract: Perchlorodiazafulvene having the formula ##STR1## IS PREPARED BY REACTING 2,4,5-TRICHLORO-2-TRICHLOROMETHYL-2H-imidazole having the formula ##STR2## WITH DECHLORINATING AGENTS AT ELEVATED TEMPERATURES AND IS USEFUL AS A FUNGICIDE.

Abstract: Trichlorothiazole of the formula ##STR1## IS PREPARED BY REACTING 1,2,2,2-TETRACHLOROETHYL-ISOCYANIDEDICHLORIDE OF THE FORMULA ##STR2## WITH 1 TO 1.2 TIMES THE STOICHIOMETRIC AMOUNT OF SULFUR AT A TEMPERATURE OF ABOUT 150.degree. TO 250.degree. C, preferably about 170.degree. to 230.degree. C.

Abstract: Trichlorothiazole is prepared by reacting 1,2-dichloroethyl-isocyanide dichloride with a sulphur chloride at elevated temperatures in the presence of catalytic amounts of a Friedel-Crafts catalyst.

Abstract: The new compound N-(1,2,2,2-tetrachloroethyl)-formimide chloride of the formula ##STR1## is produced by reacting a substituted formamide of the formula ##STR2## wherein X is OH or Cl,With approximately the stoichiometrically required amount of a highly reactive inorganic acid chloride, e.g. phosphorus pentachloride. The compound (I) can be reacted with sulfur at about 150.degree. to 250.degree. C to produce trichlorothiazole of the formula ##STR3## which is known to have insecticidal activity.

Abstract: 2,5-Dichloro-thiazolo[4,5-d]thiazole, which is useful as a fungicide, is prepared by reacting compounds having the formula ##EQU1## wherein X.sub.1 is Cl, andX.sub.2 is H or Cl orX.sub.1 and X.sub.2 together form a C-C bondIn the temperature range of 150.degree. to 300.degree. C, with at least the stoichiometrically required amount of sulphur.

Abstract: Novel carbonic acid derivatives of 2-mercapto-4,5-dichloro-thiazole which has the formula ##SPC1##In whichX is oxygen or sulfurY is a radical -OR, -SR or ##EQU1## are outstandingly effective herbicides exhibiting particularly pronounced post-emergence activity.

Abstract: Improvements in the process of producing coke from bituminous coal in high-efficiency coking ovens, whereby the size of the lumps of coke and their strength are both increased, which comprises maintaining a coking rate between 1.2 and 2.8, and preferably between 1.44 and 2.0, inches per hour, based upon the width in inches of the coking chamber and the time required to complete the coking operation, and maintaining a rate of temperature increase between 1.6 and 3.3 centigrade degrees per minute during the heating of the coal while it is in the plastic range. The coal preferably is also preliminarily heated to a temperature between 160.degree. and 250.degree.C, preferably between 180.degree. and 200.degree.C, before being charged to the high-efficiency coking oven, and the width of the coking chamber of the high-efficiency oven that is used is at least 500 millimeters (19.7 inches).

Abstract: Trichloroethylidene-bis-(isocyanide-dichloride) is prepared by treating trichloroethylidene-bis-formamide with acid chlorides in the presence of an inert diluent at temperatures of about 0.degree. to 150.degree.C. The reaction mixture is then reacted, simultaneously or subsequently, with an excess of chlorine to form the desired product.