公开(公告)号：US3767586A

公开(公告)日：1973-10-23

申请号：US3767586D

申请日：1971-09-10

Applicant: DU PONT

Inventor： RUTKIEWIC A

IPC: C01B21/096 ,  C01B21/52 ,  D21C3/18

CPC classification number: C01B21/096

Abstract: A PROCESS FOR PREPARING STABLE CONCENTRATED AQUEOUS SOLUTIONS OF N-HALO COMPOUNDS, IN WHICH WATER AN N-HYDROGEN COMPOUND, A HALOGEN (BR2, CL2, ORI2) AN ALKALI OR ALKALINE EARTH HYDROXIDE, AND A BUFFERING COMPOUND ARE ADDED TO AND MIXED IN A REACTION VESSEL. THE BUFFER ESTABLISHES AND MAINTAINS A PH IN THE RANGE OF 4.5 TO 8.5, THEREBY PREVENTING RAPID DECOMPOSITION OF THE N-HALO COMPOUNDS WHICH OCCURS UNDER EXTREME ACID OR ALKALINE CONDITIONS. THE SOLUTIONS ARE USEFUL AS HOUSEHOLD AND INDUSTRIAL BLEACHES, AS SLIMICIDES, AND FOR OTHER PURPOSES.

公开(公告)号：US3749672A

公开(公告)日：1973-07-31

申请号：US3749672D

申请日：1971-04-19

Applicant: DU PONT

Inventor： GOLTON W ,  RUTKIEWIC A

IPC: C02F1/50 ,  C11D3/395 ,  D21C9/00 ,  D21C9/10 ,  D21C9/12 ,  C11D7/54

CPC classification number: C02F1/50 ,  C11D3/3955 ,  C11D3/3956 ,  D21C9/008 ,  D21C9/1036 ,  D21C9/12

Abstract: DESCRIBED AND CLAIMED ARE STABLE AQUEOUS SYSTEMS CONTAINING AN N-HYDROGEN COMPOUND AND A HYPOBROMITE, HYPOCHLORIDE OR HYPOIODITE IN EQUILIBRIUM WITH THE CORRESPONDING N-HALO COMPOUND OR COMPOUNDS. STABILITY IS PROVIDED BY INCLUSION OF A BUFFER WHICH MAINTAINS PH OF THE SYSTEM BETWEEN 4 AND 11. THE SYSTEMS CAN BE USED WHEREVER GRADUAL RELEASE OF ACTIVE HALOGEN IS DESIRED, E.G. AS HOUSEHOLD LAUNDRY OR INDUSTRIAL BLEACHES OR AS AGENTS FOR CONTROL OF MICRO-ORGANISMS IN PROCESS WATER STREAMS.