公开(公告)号：US2380248A

公开(公告)日：1945-07-10

申请号：US39209441

申请日：1941-05-06

Applicant: DU PONT

Inventor： ACKEN MARSHALL F ,  CAVANAUGH ROBERT M

IPC: C07C201/16

CPC classification number: C07C201/16 ,  C06B21/0091 ,  C07C205/06

公开(公告)号：US2380246A

公开(公告)日：1945-07-10

申请号：US31235440

申请日：1940-01-04

Applicant: DU PONT

Inventor： KNAKE MAX C

IPC: C07C201/16

CPC classification number: C07C201/16 ,  C06B21/0091 ,  C07C205/06

公开(公告)号：US2276564A

公开(公告)日：1942-03-17

申请号：US30123139

申请日：1939-10-25

Applicant: HERCULES POWDER CO LTD

Inventor： COX RICHARD F B

IPC: C07C201/16

CPC classification number: C07C201/16 ,  C07C45/78 ,  C07C205/15 ,  C07C47/04

公开(公告)号：US2250255A

公开(公告)日：1941-07-22

申请号：US30123239

申请日：1939-10-25

Applicant: HERCULES POWDER CO LTD

Inventor： COX RICHARD F B

IPC: C07C201/16

CPC classification number: C07C201/16 ,  C07C205/15

公开(公告)号：US2150123A

公开(公告)日：1939-03-07

申请号：US2150123D

CPC classification number: C07C205/02 ,  C07C201/08 ,  C07C201/16

公开(公告)号：US2056260A

公开(公告)日：1936-10-06

申请号：US2056260D

CPC classification number: C07C205/37 ,  C07C201/16 ,  C07C2601/16

公开(公告)号：US1975598A

公开(公告)日：1934-10-02

申请号：US62151532

申请日：1932-07-08

Applicant: ICI LTD

Inventor： PARKER DAVIES GEORGE

IPC: C06B21/00 ,  C07C201/16

CPC classification number: C06B21/0091 ,  C07C201/16 ,  C07C205/06

Abstract: Trinitrotoluene, completely or nearly free from mineral acids, is purified by treating it in the molten state at or about its solidifaction point and preferably not above 83 DEG C., with a dilute aqueous solution of an alkali sulphite such as sodium sulphite in the presence of a weakly acidic substance or mixture of substances in quantity at least sufficient to maintain an appreciably steady hydrogen ion concentration throughout the treatment, the initial hydrogen ion concentration of the aqueous solution lying between pH 7,0 and 8,3. Suitable weakly acidic solutions are a mixture of sodium acetate and acetic acid, sodium mono hydrogen phosphate and sodium dihydrogen phosphate, boric acid alone or where the crude trinitrotoluene contains a little residual acid boric acid mixed with sodium borate, ammonium bicarbonate or sodium bicarbonate. In an example molten crude trinitrotoluene, previously washed with water until practically free from mineral acid, is stirred with an aqueous solution of sodium sulphite, sodium monohydrogen phosphate and sodium dihydrogen phosphate. The mixture is allowed to settle and the separated trinitrotoluene is treated with a further amount of the aqueous solution, separated and washed. The process may be carried out continuously.

公开(公告)号：US1964792A

公开(公告)日：1934-07-03

申请号：US55155931

申请日：1931-07-17

Applicant: DU PONT

Inventor： WARREN DAVIS CLARK

IPC: C07C201/16

CPC classification number: C07C201/16 ,  C06B21/0091 ,  C07C205/06

公开(公告)号：US1936607A

公开(公告)日：1933-11-28

申请号：US58697332

申请日：1932-01-15

Applicant: RINKENBACH WILLIAM H

Inventor： RINKENBACH WILLIAM H

IPC: C07C201/16

CPC classification number: C07C201/16 ,  C06B21/0091 ,  C07C205/06

公开(公告)号：US1814980A

公开(公告)日：1931-07-14

申请号：US26837428

申请日：1928-04-07

Applicant: FRIEDRICH THOMAS

Inventor： FRIEDRICH THOMAS

CPC classification number: C07C201/16