公开(公告)号：US3767758A

公开(公告)日：1973-10-23

申请号：US3767758D

申请日：1971-07-01

Applicant: STAMICARBON

Inventor： MARS P ,  DUYVERMAN C ,  GORGELS M

IPC: B01J23/00 ,  C01B21/14 ,  C01B21/00

CPC classification number: C01B21/1418

Abstract: SALTS OF HYDROXYLAMINE ARE PREPARED BY REDUCTION OF NITRIC ACID WITH HYDROGEN IN AN ACID MEDIUM AND A CATALYST CONTAINING A METAL FROM THE PLATINUM GROUP OF METALS AND AN ACTIVATOR SELECTED FROM THE GROUP OF METALS, INCLUDING COPPER, GERMANIUM, CADMIUM, INDIUM, TIN, GALLIUM, SILVER, ARSENIC, THALLIUM, ANTIMONY, GOLD MERCURY, LEAD AND BISMUTH. THE REACTION CATALYST EXHIBITS A HIGH SELECTIVITY AND CONVERSION.

公开(公告)号：US3720755A

公开(公告)日：1973-03-13

申请号：US3720755D

申请日：1971-03-26

Applicant: STAMICARBON

Inventor： DUYVERMAN C ,  GORGELS M

IPC: C01B17/90 ,  C01B21/14 ,  C01B25/234 ,  C01B15/16 ,  C01B25/16 ,  C01B25/26

CPC classification number: C01B21/1418 ,  C01B17/90 ,  C01B25/234

Abstract: A process for preparing a solution of hydroxylammonium phosphate which includes catalytic reduction of nitrate ions in an aqueous solution containing phosphoric acid using molecular hydrogen. In order to maintain the activity of the catalyst the phosphoric acid to be fed to the synthesis zone is first freed of heavy metal contaminants by contacting the phosphoric acid for a sufficient time with hydrogen and an absorbent consisting of a metal of the platinum group.

Abstract translation: 一种制备磷酸氢氧化铵溶液的方法，其包括使用分子氢在含磷酸的水溶液中催化还原硝酸根离子。