公开(公告)号：US3749648A

公开(公告)日：1973-07-31

申请号：US3749648D

申请日：1971-05-19

Applicant: DU PONT

Inventor： BOETTLER A ,  CLARKE A ,  WHEATLEY R

IPC: B01D11/04 ,  C01B17/94 ,  C07C51/48 ,  C07C201/16 ,  B01D15/00 ,  B01D3/38

CPC classification number: B01D11/0488 ,  C01B17/94 ,  C07C51/43 ,  C07C51/44 ,  C07C51/47 ,  C07C51/48 ,  C07C201/16 ,  C07C63/70 ,  C07C205/12 ,  C07C205/58

Abstract: A WASTE SULFURIC ACID-WATER SOLUTION CONTAINING SMALL AMOUNT OF NITRIC ACID, NITROUS ACID, HYDROFLUORIC ACID AND CHLORINATED AND NITRATED ORGANICS OF THE BENZOIC AND BENZOTRIFLUORIDE TYPE CAN BE RECONSTITUTED BY A RECOVERY PROCESS. IN ONE EMBODIMENT THE FIRST STEP WILL BE SOLVENT EXTRACTION TO REMOVE THE ORGANICS FROM THE WASTE ACID. THE SECOND STEP WILL INVOLVE STEAM STRIPPING OF THE WASTE ACID TO REMOVE THE NITRIC ACID, NITROUS ACID, HYDROFLUORIC ACID, AND THE SMALL QUANTITY OF SOLVENT WHICH WAS DISSOLVED IN THE ACID IN THE FIRST STEP. AFTER THESE PROCESS STEPS, THE RECONSTITUTED ACID WILL BE SUITABLE FOR NORMAL INDUSTRIAL USE. IN ANOTHER EMBODIMENT, THE WASTE ACID IS FIRST STEAM DISTILLED TO REMOVE THE NITRIC ACID, NITROUS ACID, HYDROFLUORIC ACID AND THE CHLORINATED AND NITRATED BENZOTRIFLUORIDE COMPOUNDS. THE STILL BOTTOMS ARE THEN COOLED AND FILTERED TO REMOVE THE BENZOIC ACID COMPOUNDS. THE FILTRATE IS THE DESIRED RECONSTITUTED ACID.

公开(公告)号：US3708545A

公开(公告)日：1973-01-02

申请号：US3708545D

申请日：1969-02-11

Applicant: DU PONT

Inventor： SQUIRE E

IPC: C07B61/00 ,  B01J21/00 ,  C07C67/00 ,  C07C201/00 ,  C07C205/22 ,  C07C79/24

CPC classification number: C07C201/16 ,  C07C205/22

Abstract: A PROCESS FOR THE PREPATATION OF P-NITROPHENOL AND METAL SALTS THEREOF WHICH COMPRISES AGITATING NITROBENZENE, METAL HYDROXIDE, AMMONIA AND OPTIONALLY OXYGEN FOR PREPARATION OF THE METAL SALT AND ACIDIFICATION OF THE METAL SALT OF THE PREPARATION OF THE P-NITROPHENOL.

公开(公告)号：US3705198A

公开(公告)日：1972-12-05

申请号：US3705198D

申请日：1969-05-29

Applicant: MONSANTO CO

Inventor： TERPSTRA MARRINE A

IPC: C07C201/16 ,  C07C205/22 ,  C07C79/26

CPC classification number: C07C201/16 ,  C07C205/22

Abstract: The formation of color bodies in o-nitrophenol is inhibited by treatment of the reaction mass with an alkali metal bisulfite, alkali metal metabisulfite, urea, or sulfur dioxide.

Abstract translation: 通过用碱金属亚硫酸氢盐，碱金属偏亚硫酸氢钠，尿素或二氧化硫处理反应物质，可以抑制邻硝基苯酚中着色体的形成。

公开(公告)号：US3620928A

公开(公告)日：1971-11-16

申请号：US3620928D

申请日：1970-07-13

Applicant: BADGER CO

Inventor： MISERLIS CONSTANTINE D

IPC: C07C201/16 ,  B01D3/34 ,  B01D3/00 ,  C07C79/10

CPC classification number: C07C201/16 ,  C07C205/06

Abstract: A method of separating isomers of mononitrotoluene by fractional distillation without need for crystallization equipment. Two embodiments are described, one using a single distillating column that is operated in a two-pass blocked out fashion, and the other using two series-connected distillation columns.

公开(公告)号：US3287393A

公开(公告)日：1966-11-22

申请号：US27463163

申请日：1963-04-22

Applicant: BOFORS AB

Inventor： JOHANNES AKERSTROM STIG HJALMA

IPC: C07C205/56

CPC classification number: C07C201/12 ,  C07C201/16 ,  C07C253/00 ,  C07C205/56 ,  C07C255/50

公开(公告)号：US3253045A

公开(公告)日：1966-05-24

申请号：US41066364

申请日：1964-11-12

Applicant: UNIVERSAL OIL PROD CO

Inventor： SPARKS ALLEN K

IPC: C07C205/12

CPC classification number: C07C201/16 ,  C07C201/08 ,  C07C205/12

公开(公告)号：US3221064A

公开(公告)日：1965-11-30

申请号：US42135164

申请日：1964-12-28

Applicant: ICI LTD

Inventor： EDWARD BROGDEN MICHAEL ,  GEORGE MILNES ,  HARRY PINKERTON

IPC: C07C201/16

CPC classification number: C07C201/16 ,  C07C205/06

Abstract: Dinitrotoluenes are purified by contacting liquid dinitrotoluenes with water in a centrifugal pump, using from 0.5 parts to 2.0 parts by volume of water per part by volume of dinitrotoluenes, separating the dinitrotoluenes from the water washings, thereafter contacting the dinitrotoluenes in a centrifugal pump with dilute aqueous NaOH solution employing from 0.1 part to 0.5 part by volume of NaOH solution per part of dinitrotoluenes, separating the dinitrotoluenes from the NaOH solution and thereafter washing the dinitrotoluenes with water. The purification may be performed within the range 60 DEG to 80 DEG C. The centrifugal pump may circulate the dinitrotoluenes and wash liquor round a by-pass.

公开(公告)号：US3098095A

公开(公告)日：1963-07-16

申请号：US83286659

申请日：1959-08-10

Applicant: STANDARED OIL COMPANY

Inventor： KNOBLOCH JAMES O ,  SHEPARD JOHN W ,  LIAO HSIANG P

IPC: C07C51/573 ,  C07C201/16

CPC classification number: C07C201/16 ,  C07C51/573 ,  C07C205/57

公开(公告)号：US3086063A

公开(公告)日：1963-04-16

申请号：US11403061

申请日：1961-06-01

Applicant: ALLIED CHEM

Inventor： LIND CHARLES J ,  SOGN ALLEN W

IPC: C07C201/16

CPC classification number: C07C201/16 ,  C07C205/06

公开(公告)号：US2883435A

公开(公告)日：1959-04-21

申请号：US61500256

申请日：1956-10-10

Applicant: GEN ANILINE & FILM CORP

Inventor： ELDRED WELCH

IPC: C07C201/16

CPC classification number: C07C201/16 ,  C07C205/12