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18-11-2015 дата публикации

A layering groove that material layering after is used for o phenylenediamine to restore

Номер: CN0204767604U
Автор: ZHENG HONGLIANG, LIU JIANQING, ZHANG BINGXIANG, ZHU YUMEI, YAO ZHOUPING
Принадлежит:

The utility model provides a layering groove that material layering after is used for o phenylenediamine to restore, including the truss, the truss top sets up the cell body, be located in the truss the below of cell body sets up U type pipe, the bottom of cell body sets up the toper groove, the lateral wall bottom of cell body sets up liquid outlet A, the lateral wall bottom in toper groove sets up liquid outlet B, the bottom in toper groove sets up liquid outlet C, the feed liquor end of U type pipe with the liquid outlet C intercommunication in toper groove. The utility model discloses in the hydrate of o phenylenediamine and salt, material enter into the cell body, then the layering of stewing, it is intraductal that the mother liquor can flow into the U type, the layering in the cell body of stewing of the hydrate of o phenylenediamine and salt, and the bottom in toper groove 4 sets up the liquid separation that liquid outlet C7 can the bottom and comes out, and the lateral wall bottom ...

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Номер записи: 1
30-05-2023 дата публикации

Separation and purification process of o-phenylenediamine

Номер: CN116178175A
Автор: CHEN XIANGBIN, GAO BIN, YU SANMI, SONG BANGHUA, WANG XI, LU DAOSHENG, YAO ZHOUPING, HUANG DUOTOU, WU SHUANGWANG, ZHAI HUAKUI
Принадлежит:

The invention discloses an o-phenylenediamine separation and purification process, which belongs to the technical field of o-phenylenediamine separation and purification, and comprises the following steps: adding water, a skeleton nickel catalyst and o-nitroaniline into a reaction kettle, stirring, heating, introducing hydrogen into the reaction kettle, reacting for 6 hours, and standing for 30-45 minutes when the pressure in the reaction kettle is not reduced to obtain a material mixed solution; after a crystal substance is melted, the crystal substance is conveyed to a product tank; carrying out secondary crystallization on the uncrystallized solution through a crystallizer, melting a crystal substance II, and feeding the crystal substance II into a product tank; and the uncrystallized solution II sequentially enters a desolventizing tower I and a desolventizing tower II, hydrogen and water in the solution are removed twice, and finally, the removed solution B continues to return to the ...

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Номер записи: 2