Method for preparing a sorbent

Patent metadata

Field	Value
Publication number	US-2016288083-A1
Application number	US-201415035807-A
Country	US
Kind code	A1
Filing date	Dec 4, 2014
Priority date	Dec 18, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

A method is described for preparing a sorbent including the steps of:
(i) mixing together a particulate copper sulphide material, a particulate support material and one or more binders,
(ii) shaping the mixture, and
(iii) drying the shaped mixture to form a dried sorbent.

First claim

1 - 18 . (canceled)

19 . A method for preparing a sorbent comprising the steps of:
(i) mixing together a particulate copper sulphide material, a particulate support material and one or more binders, (ii) shaping the mixture by granulating the mixture in a granulator, and (iii) drying the shaped mixture to form a dried sorbent, wherein the shaping and/or drying steps are performed under a non-oxidising atmosphere.

20 . The method according to claim 19 wherein the particulate copper sulphide material is manufactured by either roasting of copper or a copper compound with elemental sulphur, precipitation of copper sulphide from solution, sulphiding of copper compounds using hydrogen sulphide, or a mechanochemical process in which powdered copper metal is mixed with elemental sulphur under conditions that cause the elemental copper and elemental sulphur to react to form one or more copper sulphides.

21 . The method according to claim 19 wherein the copper sulphide comprises one or more copper sulphides selected from copper (II) sulphide, CuS, and/or substoichiometric copper sulphides of formula Cu 2-x S where x is 0-1.

22 . The method according to claim 19 wherein the particulate copper sulphide has an overall S:Cu atomic ratio of 0.8.

23 . The method according to claim 19 wherein the particulate copper sulphide material is in the form of a powder with an average particle size, [D 50 ], in the range 5-5-100 μm.

24 . The method according to claim 19 wherein the copper content of the dried sorbent is in the range 10-75% by weight (expressed as CuS).

25 . The method according to claim 19 wherein the particulate support material is selected from the group consisting of alumina, hydrated alumina, titania, zirconia, silica or aluminosilicate, and a mixture of two or more of these.

26 . The method according to claim 19 wherein the dried sorbent comprises 20-60% by weight of the particulate support material.

27 . The method according to claim 19 wherein the binder is selected from the group consisting of clay binders, cement binders and organic polymer binders.

28 . The method according to claim 19 wherein the binder is a combination of a cement binder and a clay binder.

29 . The method according to claim 28 wherein the relative weights of the cement and clay binders is in the range 1:1 to 3:1 (first to second binder).

30 . The method according to claim 19 wherein the total amount of the binder in the dried sorbent is in the range 5-30% by weight.

31 . The method according to claim 19 wherein the total metal sulphide content of the sorbent, other than copper sulphide, is ≦5% wt.

32 . The method according to claim 19 wherein the sorbent is dried at a temperature up to 120° C.

33 . A sorbent obtained by the method of claim 19 .

34 . A process for removing one or more heavy metals from a heavy metal-containing fluid stream by contacting the fluid stream with the sorbent according to claim 33 .

Assignees

• Johnson Matthey Plc

Inventors

• Evans Matthew James
• Lunn Matthew David Gwydion
• Partridge Martin Graham
• Young Christopher John

Classifications

• B01D15/08

  Selective adsorption, e.g. chromatography · CPC title

• B01D2257/602

  Mercury or mercury compounds · CPC title

• B01J20/103

  comprising silica · CPC title

• B01D2256/20

  Carbon monoxide · CPC title

• B01J2/12

  in rotating drums · CPC title