公开(公告)号：US3144476A

公开(公告)日：1964-08-11

申请号：US17466962

申请日：1962-02-21

Applicant: SHELL OIL CO

Inventor： TEN HAKEN PIETER

IPC: C07C201/16

CPC classification number: C07C253/14 ,  C07C201/16 ,  C07C205/12 ,  C07C255/50

Abstract: Mixtures of isomeric dihalonitrobenzenes, one isomer of which has a halogen atom in a position ortho to the nitro group, are separated by reacting the mixture at a temperature of at least 120 DEG C. with a specified inorganic cyanide in the presence of an organic diluent hereinafter specified, thus preferentially converting the said isomer to a halogenated ortho-cyanonitrobenzene, and then separating this orthocyanitrobenzene from the other unchanged isomer e.g., by steam distillation or solvent extraction with light petroleum. Inorganic cyanides specified are alkali-metal cyanides, cuprous cyanide, a mixture of an alkali-metal cyanide and cuprous cyanide, or an alkali metal cyanide-cuprous cyanide complex. Organic diluents specified are tertiary amines, such as pyridine, dialkylcarbonamides, such as dimethylformamide, and dialkylsulphoxides, such as dimethyl sulphoxide. An inert diluent such as an aromatic hydrocarbon, nitrobenzene or chlorobenzene may also be present. The halogen substituents in the isomers may be chlorine, bromine or iodine. Examples are given, illustrating the separation of mixtures of 2:3-dichloronitrobenzen and 3:4-dichloronitrobenzene, by conversion of the former into a mixture of the 2,5- and 3,4-dihalonitrobenzenes may also be similarly treated.

公开(公告)号：US3100797A

公开(公告)日：1963-08-13

申请号：US71061458

申请日：1958-01-23

Applicant: DOW CHEMICAL CO

Inventor： HENDRICKSON HARRIS GUY ,  CHARLES FISCHBACK BRYANT

IPC: C07C201/16 ,  C07C205/57

CPC classification number: C07C201/16 ,  C07C201/08 ,  C07C205/57

公开(公告)号：US2988561A

公开(公告)日：1961-06-13

申请号：US41373654

申请日：1954-03-02

Applicant: KOMARMY JULIUS M

Inventor： KOMARMY JULIUS M

IPC: C07C201/16

CPC classification number: C07C201/16 ,  C07C205/24

公开(公告)号：US2844634A

公开(公告)日：1958-07-22

申请号：US58163956

申请日：1956-04-30

Applicant: COLLIER CARBON & CHEMICAL CO

Inventor： MCKINNIS ART C

IPC: C07C201/16

CPC classification number: C07C201/16 ,  C07C205/02

公开(公告)号：US2811565A

公开(公告)日：1957-10-29

申请号：US53575655

申请日：1955-09-21

Applicant: OILN MATHIESON CHEMICAL CORP

Inventor： ALEXANDER CLAUDE U ,  EMIL CZAPEK

IPC: C07C201/16

CPC classification number: C07C201/16 ,  C07C205/23 ,  C07C205/24

公开(公告)号：US2710830A

公开(公告)日：1955-06-14

申请号：US11047149

申请日：1949-08-15

Applicant: GEN TIRE & RUBBER CO

Inventor： ROY JR HERMAN T

IPC: C07C201/16 ,  C07C205/15 ,  C07C205/40

CPC classification number: C07C201/16 ,  C07C205/15 ,  C07C205/40

公开(公告)号：US2424510A

公开(公告)日：1947-07-22

申请号：US52238844

申请日：1944-02-14

Applicant: ICI LTD

Inventor： WILDER SMITH ARTHUR ERNEST ,  WILLIAM SCAIFE CHARLES ,  HOLROYD STANLEY ROBERT

IPC: C07C201/16 ,  C07C205/15 ,  C07C205/40

CPC classification number: C07C201/16 ,  C07C205/40 ,  C07C205/15

公开(公告)号：US2383707A

公开(公告)日：1945-08-28

申请号：US47371243

申请日：1943-01-27

Applicant: ATLAS POWDER CO

Inventor： CARL MARVIN H

IPC: C07C201/16

CPC classification number: C07C201/16 ,  C07C205/06

公开(公告)号：US2377727A

公开(公告)日：1945-06-05

申请号：US51248643

申请日：1943-12-01

Applicant: DU PONT

Inventor： JOHN TEAHAN CHARLES

IPC: C07C201/16

CPC classification number: C07C201/16 ,  C07C205/06

公开(公告)号：US2267309A

公开(公告)日：1941-12-23

申请号：US31862940

申请日：1940-02-12

Applicant: COMMERCIAL SOLVENTS CORP

Inventor： MURRAY SENKUS

IPC: A47K3/02 ,  C07C201/16

CPC classification number: C07C201/16 ,  C07C205/02