Patent US2012955A successfully refreshed from Google Patents.
US4477597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Higher density ion exchange resins of metal compound precipitated within pores
Assignee: Dow Chemical Co
•
Filing: 1981-10-02
•
Granted: 1984-10-16
•
Expires: 2001-10-02
Abstract
Abstract Macroporous ion exchange resins having increased apparent density are provided by incorporating into said resins a weighting agent which is of greater apparent density than the resin itself. Such weighted resins exhibit reduced bed expansion when used with upflow streams, with relatively dense liquids, and with relatively viscous liquids.
Inventors
- 👤 John M. Lee
- 👤 William C. Bauman
- 👤 Richard A. Wolcott
- 👤 John L. Burba, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:15
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/016
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
114 words
A method for providing a macroporous ion exchange resin showing reduced upflow bed expansion, said method comprising depositing within the pores of said resin a substantially insoluble weighting agent thereby preparing a composite material which has a higher apparent density than the apparent density of the starting resin, wherein the depositing of the weighting agent into said resin is accomplished by the process comprising incorporating into the pores of said resin at least one soluble compound of Zr, Ti, Si, Sn, Pb, Co, Fe, Ni, Cu or Hg and reacting said soluble compound with a reagent which converts the soluble compound in-situ in the pores to at least one insoluble metal or metal compound.
Claim 2
Independent Claim
114 words
A method for providing a macroporous ion exchange resin showing reduced upflow bed expansion, said method comprising depositing within the pores of said resin a substantially insoluble weighting agent thereby preparing a composite material which has a higher apparent density than the apparent density of the starting resin, wherein the depositing of the weighting agent into said resin is accomplished by the process comprising incorporating into the pores of said resin at least one soluble compound of Zr, Ti, Si, Sn, Pb, Co, Fe, Ni, Cu or Hg and reacting said soluble compound with a reagent which converts the soluble compound in-situ in the pores to at least one insoluble metal or metal compound.
Claim 3
Independent Claim
75 words
A method for increasing the apparent density of macroporous resin, said method comprising incorporating into the pores of said resin at least one soluble compound of Zr, Ti, Si, Sn, Pb, Co, Fe, Ni, Cu or Hg, then adding a reactant which converts in-situ, in said pores, said soluble compound to an insoluble metal or metal compound, thereby creating a resin composite having a higher apparent density than the apparent density of the resin itself.
Claim 4
Independent Claim
75 words
A method for increasing the apparent density of macroporous resin, said method comprising incorporating into the pores of said resin at least one soluble compound of Zr, Ti, Si, Sn, Pb, Co, Fe, Ni, Cu or Hg, then adding a reactant which converts in-situ, in said pores, said soluble compound to an insoluble metal or metal compound, thereby creating a resin composite having a higher apparent density than the apparent density of the resin itself.
Claim 5
Dependent Claim
15 words
The method of claim 2 wherein ion exchange functional groups are incorporated into the composite.
Claim 6
Dependent Claim
13 words
The method of claim 2 wherein the macroporous resin contains ion exchange functionalities.
Claim 7
Dependent Claim
14 words
The method of claim 2 wherein the macroporous resin is a cation exchange resin.
Claim 8
Dependent Claim
14 words
The method of claim 2 wherein the macroporous resin is an anionic exchange resin.
Claim 9
Dependent Claim
17 words
The method of claim 2 wherein the incorporated metal compound is a compound of Zr or Ti.
Claim 10
Dependent Claim
18 words
The method of claim 2 wherein the incorporated metal compound is a compound of Si, Sn, or Pb.
Claim 11
Dependent Claim
18 words
The method of claim 2 wherein the incorporated metal compound is a compound of Co, Fe, or Ni.
Claim 12
Dependent Claim
15 words
The method of claim 2 wherein the incorporated metal compound is a compound of Cu.
Claim 13
Dependent Claim
15 words
The method of claim 2 wherein the incorporated metal compound is a compound of Hg.
Claim 14
Dependent Claim
47 words
The method of claim 2 wherein the incorporated metal compound is a soluble compound of Zr or Ti, the reactant which converts said compound to an insoluble compound is ammonia, and where said insoluble compound is converted to a partial phosphate salt by reaction with phosphate ions.
Claim 15
Dependent Claim
31 words
The method of claim 2 wherein the incorporated soluble metal compound is a Hg compound, and where said Hg compound is reacted with a sulfide to convert it to insoluble HgS.
Claim 16
Dependent Claim
31 words
The method of claim 2 wherein the incorporated soluble metal compound is a Cu compound, and where said Cu compound is reacted with a sulfide to convert it to insoluble CuS.
Claim 17
Dependent Claim
26 words
The method of claim 2 wherein the incorporated soluble metal compound is a Zr compound and the in-situ precipitated insoluble metal compound is ZrO(OH) 2 .
Claim 18
Dependent Claim
30 words
The method of claim 2 wherein the incorporated soluble metal compound is a Co compound and the in-situ precipitated insoluble metal compound is Co 2 O 3 .H 2 O.
Claim 19
Dependent Claim
26 words
The method of claim 2 wherein the incorporated soluble metal compound is a Pb compound and the in-situ precipitated insoluble metal compound is Pb(OH) 4 .
Claim 20
Dependent Claim
44 words
The method of claim 2 wherein the incorporated soluble metal compound is a Pb compound, the in-situ precipitated insoluble Pb compound is PbO(OH) 2 , and where the PbO(OH) 2 is reacted with phosphate ions to form PbO(H 2 PO 4 ) 2 .
Claim 21
Dependent Claim
26 words
The method of claim 2 wherein the incorporated soluble metal compound is an Fe compound and where the in-situ precipitated insoluble compound is Fe(OH) 3 .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |