4.
    发明专利
    未知

    公开(公告)号:BR8204802A

    公开(公告)日:1983-08-02

    申请号:BR8204802

    申请日:1982-08-17

    Applicant: DEGUSSA

    Inventor: KLENK HERBERT

    Abstract: 2-Amino-5-mercapto-1,3,4-thiadiazoles can be produced in very high yields from thiosemicarbazides and carbon disulfide in aqueous phase by working in the presence of the corresponding ammonium salt of bis-2,5-mercapto-1,3,4-thiadiazole at a temperature above 40 DEG C. Preferably the process is carried out in the presence of the mother liquor from a previous reaction.

    PROCESS FOR PRODUCING 2-AMINO-5-MERCAPTO-1,2,3- THIADIAZOLES

    公开(公告)号:CA1182461A

    公开(公告)日:1985-02-12

    申请号:CA409828

    申请日:1982-08-20

    Applicant: DEGUSSA

    Inventor: KLENK HERBERT

    Abstract: 2-amino-5-mercap-to-1,3,4-thiadiazoles can be produced, in very high yields, from thiosemicarbazides and carbon disulphide in aqueous phase when the reaction is carried out in the presence of the corresponding ammonium salts of bis-2,5-mercapto-1,3,4-thiadiazoles at temperatures above 40.degree.C. The reaction is carried out preferably in the presence of the mother liquor of preceding reactions.

Patent Agency Ranking