公开(公告)号：GB2280204B

公开(公告)日：1996-09-04

申请号：GB9414748

申请日：1994-07-21

Applicant: DEGUSSA

Inventor： SCHALKE PETER ,  MUELLER EBERHARD ,  KREMER MATTHIAS ,  WAHL GEORG

IPC: B30B11/16 ,  C01C3/14 ,  C09K3/00 ,  C21D1/46 ,  C23C8/56

Abstract: A method for the preparation of a salt mixture useful for hardening steel parts, including of potassium cyanate, potassium carbonate and sodium carbonate, wherein 2.2 to 2.3 moles of urea is first reacted with 1 mole of potassium carbonate to form potassium cyanate. The escaping ammonia is converted with formaldehyde into hexamethylenetetramine. The reaction product, which is potassium cyanate and potassium carbonate, is ground, mixed with powdered sodium carbonate and pressed at between 80 DEG and 230 DEG C. into shaped pieces.

公开(公告)号：IT7951080D0

公开(公告)日：1979-12-13

申请号：IT5108079

申请日：1979-12-13

Applicant: DEGUSSA

Inventor： SCHALKE PETER ,  KLEEMAN AXEL

IPC: C07C255/00 ,  C07B31/00 ,  C07B43/08 ,  C07C67/00 ,  C07C253/00 ,  C07C255/32 ,  C07C255/33 ,  C07C255/36 ,  C07C255/37 ,  C07C255/53 ,  C07D213/57 ,  C07D213/61 ,  C07D213/84 ,  C07D333/24 ,  C07D333/38 ,  C07C

Abstract: The known synthesis for the production of aromatic substituted acetonitriles by reaction of aromatic substances with cyanogen chloride in the gas phase is improved by feeding the starting materials in gaseous form and separated from each other into the reactor. The process can be used to synthesize in general aromatic and especially hetero-aromatic substituted acetonitrile.

公开(公告)号：IT1207014B

公开(公告)日：1989-05-17

申请号：IT5108079

申请日：1979-12-13

Applicant: DEGUSSA

Inventor： SCHALKE PETER ,  KLEEMAN AXEL

IPC: C07C255/00 ,  C07B31/00 ,  C07B43/08 ,  C07C67/00 ,  C07C253/00 ,  C07C255/32 ,  C07C255/33 ,  C07C255/36 ,  C07C255/37 ,  C07C255/53 ,  C07D213/57 ,  C07D213/61 ,  C07D213/84 ,  C07D333/24 ,  C07D333/38 ,  C07C

Abstract: The known synthesis for the production of aromatic substituted acetonitriles by reaction of aromatic substances with cyanogen chloride in the gas phase is improved by feeding the starting materials in gaseous form and separated from each other into the reactor. The process can be used to synthesize in general aromatic and especially hetero-aromatic substituted acetonitrile.

公开(公告)号：CA1147341A

公开(公告)日：1983-05-31

申请号：CA371425

申请日：1981-02-20

Applicant: DEGUSSA

Inventor： KLEEMANN AXEL ,  SCHALKE PETER

IPC: C07C67/00 ,  C07C253/00 ,  C07C253/04 ,  C07C253/34 ,  C07C255/32 ,  C07C255/33 ,  C07C255/35 ,  C07C255/36 ,  C07C255/53 ,  C07D333/10 ,  C07D333/24 ,  C07C121/66

Abstract: The production of aromatic or heteroaromatic nitriles from their reactiongases, which are formed in the reaction of cyanogen chloride with aromatic or heteroaromatic methylene or methyl compounds, is carried out by partial condensation of the reaction gases at decreasing temperature stages so that the nitriles are not subjected, for a lengthy period, to a contact with the simultaneously formed hydrogen chloride.

公开(公告)号：GB2280204A

公开(公告)日：1995-01-25

申请号：GB9414748

申请日：1994-07-21

Applicant: DEGUSSA

Inventor： SCHALKE PETER ,  MUELLER EBERHARD ,  KREMER MATTHIAS ,  WAHL GEORG

IPC: B30B11/16 ,  C01C3/14 ,  C09K3/00 ,  C21D1/46 ,  C23C8/56

Abstract: For the preparation of a salt mixture for hardening steel parts, consisting of potassium cyanate, potassium carbonate and sodium carbonate, 2.2 to 2.3 moles of urea is first reacted with 1 mole of potassium carbonate to form potassium cyanate. The escaping ammonia is converted with formaldehyde into hexamethylenetetramine. The reaction product, consisting of potassium cyanate and potassium carbonate, is ground, mixed with powdered sodium carbonate and pressed at between 80 and 230 DEG C into composites.

公开(公告)号：CA2128396A1

公开(公告)日：1995-01-24

申请号：CA2128396

申请日：1994-07-20

Applicant: DEGUSSA

Inventor： SCHALKE PETER ,  MUELLER EBERHARD ,  KREMER MATTHIAS ,  WAHL GEORG

IPC: B30B11/16 ,  C01C3/14 ,  C09K3/00 ,  C21D1/46 ,  C23C8/56

Abstract: For the preparation of a salt mixture for hardening steel parts, consisting of potassium cyanate, potassium carbonate and sodium carbonate, 2.2 to 2.3 moles of urea is first reacted with 1 mole of potassium carbonate to form potassium cyanate. The escaping ammonia is converted with formaldehyde into hexamethylenetetramine. The reaction product, consisting of potassium cyanate and potassium carbonate, is ground, mixed with powdered sodium carbonate and pressed at between 80 and 230.degree.C into composites. The process has the advantages of: good recovery of ammonia, good yield of cyanate, very low formation of cyanide, and conventional powder press technology utilization.

公开(公告)号：CA1142962A

公开(公告)日：1983-03-15

申请号：CA371382

申请日：1981-02-20

Applicant: DEGUSSA

Inventor： KLEEMANN AXEL ,  SCHALKE PETER

IPC: C07C255/04 ,  C07C67/00 ,  C07C253/00 ,  C07C253/04 ,  C07C253/34 ,  C07C121/22

Abstract: Malonic dinitrile is produced for the first time from its reaction gas which is formed by reaction of acetonitrile and cyanogen chloride, by partial condensation in decreasing temperature stages, i.e., while avoiding a contact with the simultaneously formed hydrogen chloride.