公开(公告)号：US3798243A

公开(公告)日：1974-03-19

申请号：US3798243D

申请日：1971-11-30

Applicant: SANDOZ LTD

Inventor： TOTH I

IPC: C07C20060101 ,  C09B1/00 ,  C09B1/06

Abstract: BY NITRATION OF ANTHRAQUINONE IN AN EXCESS OF CONCENTACTED NITRIC ACID 1-NITROANTHRAQUINONE WITH A VERY LOW CONTENT OF NITRATION BY-PRODUCTS, ESPECIALLY B- AND DINITROANTHRQUINONE IS NITRATED WITH A LEAST 20 IF 1 MOLE OF ANTHRAQUINONE IS NITRATED WITH AT LEAST 20 MOLES OF NITRIC ACID OF AT LEAST 90% STRENGTH AT TEMPRATURES BETWEEN -40* AND +35*C. AFTER SEPARATION OF THE SOLID NITRATION PRODUCTS THE MOTHER LYE CAN BE REGENERATED AND USED AGAIN FOR NITRATION. THE NITRATION CAB BE CARRIED OUT WITH GREAT ADVANTAGE IN A CONTINUOUS MANNER.

公开(公告)号：US3836546A

公开(公告)日：1974-09-17

申请号：US10659471

申请日：1971-01-14

Applicant: SANDOZ LTD

Inventor： FREY W ,  TOTH I

IPC: C07C205/47 ,  C07C79/10 ,  C09B1/00

CPC classification number: C07C205/47 ,  C07C201/08 ,  C07C2603/24

Abstract: PROCESS FOR THE PRODUCTION OF 1-NITROANTHRAQUINONES, ESPECIALLY OF 1-NITROANTHRAQUINONES, IN GOOD YIELD AND HIGH PURITY BY NITRATION OF ANTHRAQUINONES, PARTICULARLY ANTHRAQUINONE, WITH NITRIC ACID ANDIN THE PRESENCE OF (PREFERABLY HIGHLY CONCENTRATED) PHOSPHORIC ACID AND OPTIONALLY OF SULFURIC ACID OR SULFATES. GOOD RESULTS ARE OBTAINED WITH AN EXCESS OF FUMINING NITRIC ACID AND OF CONCENTRATED PHOSPHORIC ACID.

公开(公告)号：US3836547A

公开(公告)日：1974-09-17

申请号：US26042772

申请日：1972-06-07

Applicant: SANDOZ LTD

Inventor： TOTH I

IPC: C07B43/02 ,  C07C201/08 ,  C07C205/47 ,  C09B1/00

CPC classification number: C07C201/08 ,  C07B43/02 ,  C07C2603/24 ,  C07C205/47

Abstract: DISCLOSED IS A NITRATION PROCESS CARRIED OUT IN CONCENTRATED NITRIC ACID AND IN WHICH THE RATE OF REACTION OF THE NITRATION PROCESS IS REDUCED BY THE ADDITION OF AN INHIBITOR, THE INHIBITOR HAVING A BASICITY GREATER THAN THAT OF THE NO30 ION AND BEING STABLE UNDER THE REATION CONDITIONS, E.G. BEING THE NITRITE OR PHOSPHATE ION. THE PROCESS IS USEFUL IN THE PARTIAL NITRATION OF COMPOUNDS HAVING A PLURALITY OF SITES SUSCEPTIBLE TO NITRATION, BEING PARTICULARLY USEFUL IN THE PRODUCTION OF 1-NITRO-ANTHRAQUINONE FROM ANTHRAQUINONE.

公开(公告)号：US3786073A

公开(公告)日：1974-01-15

申请号：US3786073D

申请日：1971-08-10

Applicant: SANDOZ LTD

Inventor： FREY W ,  TOTH I

IPC: B01D11/04 ,  C09B1/00

CPC classification number: B01D11/0492

Abstract: SOLID ANTHRAQUINONE NITRATION PRODUCTS SUSPENDED IN THE NITRATION MEDIUM CONSISTING MAINLY OF NITRIC ACID AND PHOSPHORIC AND/OR SULPHURIC ACID ARE FLUSHED OUT BY AN ORGANIC FLUSHING AGENT WHICH IS INSOLUBLE OR SPARINGLY SOLUBLE IN THE MOTHER LIQUOR HAS A LOWER SPECIFIC GRAVITY THAN THE MOTHER LIQUOR AND EXCERCISES WETTING ACTION UPON THE NITRATION PRODUCTS; BY THIS PROCESS VERY PURE 1-NITROANTHRAQUINONE CAN BE OBTAINED.