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    METHOD OF TREATING THE RESIDUE GAS ORIGINATING AT PREPARATION OF THE KYANURCHLORIDE
    12.
    发明专利
    METHOD OF TREATING THE RESIDUE GAS ORIGINATING AT PREPARATION OF THE KYANURCHLORIDE 未知

    公开(公告)号：CS216195B2

    公开(公告)日：1982-10-29

    申请号：CS644879

    申请日：1979-09-24

    Applicant: DEGUSSA

    Inventor： BACH GERHARD ,  GEIGER FRIEDHELM ,  HEIMBERGER WERNER ,  SCHREYER GERD ,  HILLEBRAND HORST

    IPC: B01D53/68 ,  C01C3/00 ,  C07D251/28

    Abstract: The residual gases obtained in the production of cyanuric chloride having a pressure of 1-5 bar (absolute) preferably 1-4 bar, are worked up by leading them into the lower portion of a column, reacted in the column with at least the equivalent amount of hydrogen cyanide to form cyanogen chloride and led in countercurrent flow to the water charged to the upper portion of the column whereupon the aqueous solution of cyanogen chloride formed is withdrawn from the lower portion of the column and preferably is returned into the production portion of the plant for recovery of the cyanogen chloride while the purified waste gas of the column leaves in the upper portion of the column.

    14.
    发明专利
    未知

    公开(公告)号：RO71372A

    公开(公告)日：1982-02-26

    申请号：RO8734176

    申请日：1976-08-20

    Applicant: DEGUSSA

    Inventor： GEIGER FRIEDHELM ,  HEIMBERGER WERNER ,  LUSSLING THEODOR

    IPC: C07D251/28

    Abstract: 1527788 Finely divided cyanuric chloride DEUTSCHE GOLD-UND SILBER-SCHEIDEANSTALT 20 Aug 1976 [23 Aug 1975] 34751/76 Heading C2C Finely divided, solid cyanotic chloride, is prepared by spraying liquid cyanuric chloride, which is free from chlorine and cyanogen chloride, into a separation column, cooling the liquid cyanotic chloride with at least one recycled inert gas to such a temperature that cyanuric chloride is deposited in crystalline form, washing the resulting heated gas containing cyanuric chloride vapour in a following second column in countercurrent with an inert liquid which is an effective solvent for cyanuric chloride in order to free the gas from evaporated cyanuric chloride, at the same time, cooling the gas and subsequently returning the gas to the separation chamber whilst the temperature of the washing liquid containing cyanuric chloride which has increased during the washing process is adjusted to the original temperature by recycling through a condenser, and continuously flushing the inside of the pipe connecting the separation column to the washing column with the washing liquid whilst separating a component stream of the washing liquid containing cyanuric chloride in a third column, which is a distillation column, into pure liquid cyanuric chloride which is recycled to the separation column, and into pure washing agent, which is recycled to the washing column. The inert gas is preferably nitrogen used at a temperature of 0-100‹ C., especially 20-60‹ C. The washing liquid may be toluene, xylene, 1,2,4-trichlorobenzene, hexachlorobutadiene, dodecylbenzene, m - chlorotrifluorotoluene, hexafluoroxylene, CF 3 CCl 3 , C 3 F 3 Cl 5 , C 8 F 18 or a mixture thereof. In the examples the product has a grain size distribution of 10-80 Á.

    15.
    发明专利
    未知

    公开(公告)号：RO65916A

    公开(公告)日：1980-06-15

    申请号：RO8108375

    申请日：1975-01-10

    Applicant: DEGUSSA

    Inventor： GEIGER FRIEDHELM ,  HEIMBERGER WERNER ,  SCHREYER GERD ,  WEIGERT WOLFGANG

    IPC: B01D53/68 ,  B01D53/14 ,  B01D53/77 ,  C01B7/00 ,  C01B7/01 ,  C01C3/00 ,  C01C3/14 ,  C01B7/08

    Abstract: Cyanogen chloride and hydrogen chloride are produced by reacting hydrogen cyanide and chlorine, separating from the gaseous mixture on the one hand hydrogen chloride and on the other hand cyanogen chloride which in a given case can also contain chlorine, by absorption in a halohydrocarbon which has a boiling point between that of cyanogen chloride and cyanuric chloride and after distillative separation of the dissolved cyanogen chloride-chlorine mixture returning the solvent to the absorption column, the process includes A. ADDING AS THE SOLVENT FOR THE ABSORPTION A TRIFLUOROMETHYL SUBSTITUTED AROMATIC HYDROCARBON OR HALOHYDROCARBON OR A MIXTURE OF SUCH TRIFLUOROMETHYL SUBSTITUTED AROMATIC HYDROCARBONS OR HALOHYDROCARBONS, B. SUBJECTING THE GAS MIXTURE CONSISTING OF CYANOGEN CHLORIDE, HYDROGEN CHLORIDE AND IN A GIVEN CASE CHLORINE AFTER LEAVING THE REACTOR FOR THE CHLORINATION OF HYDROGEN CYANIDE AND BEFORE ENTRANCE INTO THE ABSORPTION COLUMN TO A PRETREATMENT WITH THE SOLVENTS SET FORTH UNDER (A) AT A TEMPERATURE BETWEEN 80 DEG C. and the boiling point of the solvent and/or C. EITHER CONVERTING THE N-chloro-chloroformimide chloride formed in small amounts from the chlorine and cyanogen chloride in the course of the absorption and distillation into the insoluble chloroformimide chloride hydrochloride by gassing the solvent with hydrogen chloride and separating the insoluble hydrochloride in conventional manner and/or withdrawing the N-chloro-chloroformimide together with some cyanogen chloride and solvent of the previously named distillation column for separation of the cyanogen chloride by means of a side outlet, and in a second subsequently provided distillation column separating into solvent and pure N-chloro-chloroformimide chloride, whereby then the latter can be conducted both into the cyanogen chloride reactor and also, if connected to a plant for the production of cyanuric chloride, into the trimerization reactor for cyanogen chloride and/or D. SUBJECTING THE SOLVENT CONTAMINATED WITH BYPRODUCTS BY THE SUSPENSION RESULTING FROM THE PRETREATMENT AND/OR ACCUMULATING IN THE SUMP OF THE DISTILLATION COLUMN FOR THE SEPARATION OF THE CYANOGEN CHLORIDE COMPLETELY OR IN A PARTIAL STREAM TO AN AQUEOUS ALKALINE TREATMENT OR IN COMBINATION WITH A CYANURIC CHLORIDE CONDENSATION PLANT LEADING THE SUSPENSION FORMED IN THE PRETREATMENT TO THE CYANURIC CHLORIDE CONDENSATION COLUMN.

    16.
    发明专利
    未知

    公开(公告)号：NO141988B

    公开(公告)日：1980-03-03

    申请号：NO126573

    申请日：1973-03-27

    Applicant: DEGUSSA

    Inventor： GEIGER FRIEDHELM ,  HEIMBERGER WERNER ,  SCHREYER GERD

    IPC: C01B7/00 ,  C01B7/01 ,  C01C3/00 ,  C01B7/02

    Abstract: Side reactions in the use of gaseous chlorine are avoided by leading the chlorine containing at least 0.0001% of non-volatile compounds such as ferric chloride over silica gel, glass wool, pumice or montmorillonite. Preferably the thus treated chlorine is passed through hexachlorobutadiene or perfluorokerosene in a second absorption step. Ferric chloride can also be removed from the chlorine gas by treating with sulfuric acid.

    PROCESS FOR PRODUCING CYANOGEN CHLORIDE AND HYDROGEN CHLORIDE
    17.
    发明专利
    PROCESS FOR PRODUCING CYANOGEN CHLORIDE AND HYDROGEN CHLORIDE 未知

    公开(公告)号：CA1067674A

    公开(公告)日：1979-12-11

    申请号：CA217722

    申请日：1975-01-10

    Applicant: DEGUSSA

    Inventor： GEIGER FRIEDHELM ,  HEIMBERGER WERNER ,  SCHREYER GERD ,  WEIGERT WOLFGANG

    IPC: B01D53/68 ,  B01D53/14 ,  B01D53/77 ,  C01B7/00 ,  C01B7/01 ,  C01C3/00 ,  C01C3/14 ,  C01B7/08

    Abstract: The present invention provides a process for producing cyanogen chloride and hydrogen chloride by reacting hydrogen cyanide and chlorine, separating from the gaseous mixture (1) hydrogen chloride and (2) either cyanogen chloride or a mixture of cyanogen chloride and chlorine by absorbing (2) in a halohydrocarbon solvent which has a boiling point between that of cyanogen chloride and cyanuric chloride, separating the dissolved (2) from the solvent by distillation of (2) in a column and returning the solvent to the absorption apparatus the improvement comprising employing as the solvent for the absorption a member selected from a trifluoromethyl aromatic hydrocarbon and trifluoromethyl haloaromatic hydrocarbon.

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