US4339424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing W or Mo metal oxides
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1981-03-20
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Granted: 1982-07-13
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Expires: 2001-03-20
Abstract
Abstract A process for preparing W, Mo or mixed metal oxides thereof by oxidizing a reduced metal oxide of the formula (NH m R 4-m ) q + MO p where each R is independently C 1 -C 20 aliphatic, C 7 -C 14 araliphatic or C 3 -C 8 cycloaliphatic with the proviso that adjacent R's, together with the nitrogen atom to which they are attached, may form a 5, 6 or 7 membered heterocyclic ring, m is an integer from 0 to 4, q is a number from about 0.001 to 1/3, M is W or Mo and p is a number from 2 to 3 with aqueous hydrogen peroxide. The so-treated reduced metal oxide is isolated and heated in an oxygen containing atmosphere to form metal oxides of the formula MO p .
Inventors
- 👤 Allan J. Jacobson
- 👤 Kent H. Cheng
- 👤 M. Stanley Whittingham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:05
CPC Classifications
C; C01; C01G; C01G39/00; C01G39/02; C01B; C01B13/00; C01B13/14; C01G41/00; C01G41/02; C01P; C01P2002/00; C01P2002/70; C01P2002/77; C01P2002/80; C01P2002/82; C01P2002/88; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
158 words
A process for preparing a metal oxide having a hexagonal tungsten bronze structure, said oxide having the formula MO p where M is W or Mo and p is a number from 2 to 3 which comprises contacting a reduced metal oxide of the formula (NH m R 4-m ) q + MO p where each R is independently C 1 -C 20 aliphatic, C 7 -C 14 araliphatic or C 3 -C 8 cycloaliphatic with the proviso that adjacent R's, together with the nitrogen atom to which they are attached, may form a 5, 6 or 7 membered heterocyclic ring, m is an integer from 0 to 4, p is a number from 2 to 3 and q is a number from about 0.001 to 1/3 with aqueous hydrogen peroxide, separating the so-treated reduced metal oxide and heating the separated metal oxide in an oxygen containing atmosphere at temperatures of from about 200° to about 400° C.
Claim 2
Dependent Claim
158 words
A process for preparing a metal oxide having a hexagonal tungsten bronze structure, said oxide having the formula MO p where M is W or Mo and p is a number from 2 to 3 which comprises contacting a reduced metal oxide of the formula (NH m R 4-m ) q + MO p where each R is independently C 1 -C 20 aliphatic, C 7 -C 14 araliphatic or C 3 -C 8 cycloaliphatic with the proviso that adjacent R's, together with the nitrogen atom to which they are attached, may form a 5, 6 or 7 membered heterocyclic ring, m is an integer from 0 to 4, p is a number from 2 to 3 and q is a number from about 0.001 to 1/3 with aqueous hydrogen peroxide, separating the so-treated reduced metal oxide and heating the separated metal oxide in an oxygen containing atmosphere at temperatures of from about 200° to about 400° C.
Claim 3
Dependent Claim
9 words
The process of claim 1 wherein M is W.
Claim 4
Dependent Claim
9 words
The process of claim 1 wherein M is Mo.
Claim 5
Dependent Claim
9 words
The process of claim 1 wherein p is 3.
Claim 6
Dependent Claim
9 words
The process of claim 1 wherein m is 4.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein R is C 1 -C 10 alkyl.
Claim 8
Dependent Claim
24 words
The process of claim 1 wherein two adjacent R's together with the nitrogen to which they are attached form a 6 membered heterocyclic ring.
Claim 9
Dependent Claim
18 words
The process of claim 1 wherein the reduced metal oxide is prepared from ammonium paratungstate or ammonium paramolybdate.
Claim 10
Dependent Claim
165 words
A process of preparing a metal oxide having a hexagonal tungsten bronze structure, said oxide having the formula W a Mo b O p where a and b are numbers whose sum is 1 and p is a number from 2 to 3 which comprises contacting a reduced metal oxide of the formula (NH m R 4-m ) q + WaMo b O p where R is independently C 1 -C 20 aliphatic, with the proviso that adjacent R's, together with the nitrogen atom to which they are attached, may form a 5, 6 or 7 membered heterocyclic ring, m is an integer from 0 to 4, a and b are numbers whose sum is 1, p is a number from 2 to 3 and q is a number from about 0.001 to 1/3 with aqueous hydrogen peroxide, separating the so-treated reduced metal oxide and heating the separated metal oxide in an oxygen containing atmosphere at temperatures of from about 200° to about 400° C.
Claim 11
Dependent Claim
165 words
A process of preparing a metal oxide having a hexagonal tungsten bronze structure, said oxide having the formula W a Mo b O p where a and b are numbers whose sum is 1 and p is a number from 2 to 3 which comprises contacting a reduced metal oxide of the formula (NH m R 4-m ) q + WaMo b O p where R is independently C 1 -C 20 aliphatic, with the proviso that adjacent R's, together with the nitrogen atom to which they are attached, may form a 5, 6 or 7 membered heterocyclic ring, m is an integer from 0 to 4, a and b are numbers whose sum is 1, p is a number from 2 to 3 and q is a number from about 0.001 to 1/3 with aqueous hydrogen peroxide, separating the so-treated reduced metal oxide and heating the separated metal oxide in an oxygen containing atmosphere at temperatures of from about 200° to about 400° C.
Claim 12
Dependent Claim
106 words
A process for preparing WO 3 having a hexagonal tungsten bronze structure which comprises contacting a reduced metal oxide of the formula (NH m R 4-m ) q + WO 3 where each R is independently C 1 -C 20 aliphatic, with the proviso that adjacent R's, together with the nitrogen atom to which they are attached, may form a 5, 6 or 7 membered heterocyclic ring, m is an integer from 0 to 4 and q is a number from about 0.001 to 1/3 with aqueous hydrogen peroxide, separating the so-treated reduced metal oxide and heating the separated metal oxide in an oxygen containing atmosphere.
Claim 13
Dependent Claim
106 words
A process for preparing WO 3 having a hexagonal tungsten bronze structure which comprises contacting a reduced metal oxide of the formula (NH m R 4-m ) q + WO 3 where each R is independently C 1 -C 20 aliphatic, with the proviso that adjacent R's, together with the nitrogen atom to which they are attached, may form a 5, 6 or 7 membered heterocyclic ring, m is an integer from 0 to 4 and q is a number from about 0.001 to 1/3 with aqueous hydrogen peroxide, separating the so-treated reduced metal oxide and heating the separated metal oxide in an oxygen containing atmosphere.
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) | 1985-07-12 | 1986-01-11 | 1986-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-12 | 1990-01-11 | 1990-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-12 | 1994-01-11 | 1994-07-13 | $7700.00 | Window Closed / Lapsed |