公开(公告)号：US20160289792A1

公开(公告)日：2016-10-06

申请号：US15185113

申请日：2016-06-17

Applicant: Chevron U.S.A. Inc.

Inventor： Rahul Shankar Bhaduri ,  Hye Kyung Cho Timken ,  Phillip Ian Cuspard

IPC: C22B3/00 ,  C22B7/00

CPC classification number: C22B11/048 ,  B01J19/18 ,  B01J23/96 ,  B01J27/13 ,  B01J27/32 ,  B01J38/10 ,  B01J38/64 ,  B01J38/68 ,  B01J2219/00177 ,  C22B7/009 ,  Y02P10/214

Abstract: A process is provided for preparing a spent noble metal fixed-bed catalyst for precious metals recovery, comprising: a) adding the catalyst to a caustic solution to wash the spent catalyst and to make a wash slurry having an alkaline pH, wherein the spent catalyst has been in contact with chloroaluminate ionic liquid catalyst, and wherein the spent catalyst comprises from 5 to 35 wt % chloride; and b) filtering the wash slurry and collecting: i) a filter cake having from at least 70 wt % of the chloride in the spent catalyst removed and having the noble metals retained, and ii) a wash filtrate. Also provided is a filter cake comprising a washed consolidated cake having 40 to 75 wt % solids, a cake moisture content from 25 to less than 60 wt %, 0.1 to 1.5 wt % total noble metals, and a residual chloride content of from zero to less than 4 wt %.

Abstract translation: 提供了一种制备用于贵金属回收的废贵金属固定床催化剂的方法，包括：a）将催化剂加入苛性碱溶液中以洗涤废催化剂并制备具有碱性pH的洗涤浆液，其中废催化剂 已经与氯铝酸盐离子液体催化剂接触，并且其中废催化剂包含5至35重量％的氯化物; 和b）过滤洗涤浆液并收集：i）从除去的废催化剂中除去至少70重量％的氯化物并且保留贵金属的滤饼，和ii）洗涤滤液。 还提供了一种滤饼，其包括洗涤的固结滤饼，其具有40至75重量％的固体，饼状水分含量为25至小于60重量％，总贵金属为0.1至1.5重量％，残留氯含量为0至 小于4重量％。