US3887694A
Expired / Lapsed
US
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Production of chlorine
Assignee: Titanium Technology NV
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Filing: 1972-12-22
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Granted: 1975-06-03
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Expires: 1992-12-22
Abstract
Abstract A process is claimed for producing elemental chlorine by oxidizing, with an oxygen-containing gas at a temperature of 400* to 1,200*C., an alkali-metal tetra-chloroferrate produced by heating an aqueous ferric chloride with an alkali-metal chloride in the temperature range of 180* to 310*C.
Inventors
- 👤 Jr Wendell E Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:46
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/01; C01B7/03
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
14 words
A PROCESS FOR PRODUCING CHLORINE COMPRISING THE STEPS OF: A. HEATING A MIXTURE COMPRISING:
Claim 2
Dependent Claim
14 words
A PROCESS FOR PRODUCING CHLORINE COMPRISING THE STEPS OF: A. HEATING A MIXTURE COMPRISING:
Claim 3
Dependent Claim
49 words
A HYDRATED FERRIC CHLORIDE OF THE FORMULA FECL3.NH2O WHEREIN N IS A NUMBER IN THE RANGE OF 0 TO 6 OR AN AQUEOUS SOLUTION OF FERRIC CHLORIDE AND AN ALKALI-METLA CHLORIDE WHEREIN THE MOLE RATIO OF ALKALI-METAL CHLORIDE TO FERRIC CHLORIDE IS IN THE RANGE OF 0.75:1 TO 4:1;
Claim 4
Dependent Claim
49 words
A HYDRATED FERRIC CHLORIDE OF THE FORMULA FECL3.NH2O WHEREIN N IS A NUMBER IN THE RANGE OF 0 TO 6 OR AN AQUEOUS SOLUTION OF FERRIC CHLORIDE AND AN ALKALI-METLA CHLORIDE WHEREIN THE MOLE RATIO OF ALKALI-METAL CHLORIDE TO FERRIC CHLORIDE IS IN THE RANGE OF 0.75:1 TO 4:1;
Claim 5
Dependent Claim
14 words
A process for producing chlorine comprising the steps of: a. heating a mixture comprising:
Claim 6
Dependent Claim
14 words
A process for producing chlorine comprising the steps of: a. heating a mixture comprising:
Claim 7
Dependent Claim
49 words
a hydrated ferric chloride of the formula FeCl3.nH2O wherein n is a number in the range of 0 to 6 or an aqueous solution of ferric chloride and an alkali-metal chloride wherein the mole ratio of alkali-metal chloride to ferric chloride is in the range of 0.75:1 to 4:1;
Claim 8
Dependent Claim
49 words
a hydrated ferric chloride of the formula FeCl3.nH2O wherein n is a number in the range of 0 to 6 or an aqueous solution of ferric chloride and an alkali-metal chloride wherein the mole ratio of alkali-metal chloride to ferric chloride is in the range of 0.75:1 to 4:1;
Claim 9
Dependent Claim
16 words
ferric oxide wherein the mole ratio of ferric oxide to ferric chloride is 0.2 to 1.0;
Claim 10
Dependent Claim
16 words
ferric oxide wherein the mole ratio of ferric oxide to ferric chloride is 0.2 to 1.0;
Claim 11
Dependent Claim
16 words
FERRIC OXIDE WHEREIN THE MOLE RATIO OF FERRIC OXIDE TO FERRIC CHLORIDE IS 0.2 TO 1.0;
Claim 12
Dependent Claim
16 words
FERRIC OXIDE WHEREIN THE MOLE RATIO OF FERRIC OXIDE TO FERRIC CHLORIDE IS 0.2 TO 1.0;
Claim 13
Dependent Claim
33 words
The process of claim 1 wherein the dehydrated product of step (a) is produced by heating the mixture at a temperature in the range of 180* to 250*C. for 0.1 to 1.0 hour.
Claim 14
Dependent Claim
31 words
The process of claim 2 wherein the alkali-metal chloride is sodium chloride and wherein the mole ratio of sodium chloride to ferric chloride is in the range of 1.1 to 1.8:1.
Claim 15
Dependent Claim
2 words
WATER; AND
Claim 16
Dependent Claim
2 words
WATER; AND
Claim 17
Dependent Claim
2 words
water; and
Claim 18
Dependent Claim
2 words
water; and
Claim 19
Dependent Claim
80 words
at least a sufficient amount of hydrogen chloride or hydrochloric acid to react with iron oxides a at a temperature in the range of 180* to 310*C. and distilling all of the water as water or hydrochloric acid to produce a dehydrated product; and b. reacting the dehyrated product of (a) with at least a stoichiometric amount of an oxygen containing gas, at a temperature in the range of 400* to 1,200*C., to produce chlorine, iron oxide and unreacted chlorides.
Claim 20
Dependent Claim
80 words
at least a sufficient amount of hydrogen chloride or hydrochloric acid to react with iron oxides a at a temperature in the range of 180* to 310*C. and distilling all of the water as water or hydrochloric acid to produce a dehydrated product; and b. reacting the dehyrated product of (a) with at least a stoichiometric amount of an oxygen containing gas, at a temperature in the range of 400* to 1,200*C., to produce chlorine, iron oxide and unreacted chlorides.
Claim 21
Dependent Claim
79 words
AT LEAST SUFFICIENT AMOUNT OF HYDROGEN CHLORIDE OR HYDROCHLORIC ACID TO REACT WITH IRON OXIDES A AT A TEMPERATURE IN THE RANGE OF 180* TO 310*C. AND DISTILLING ALL OF THE WATER AS WATER OR HYDROCHLORIC ACID TO PRODUCE A DEHYDRATED PRODUCT; AND B. REACTING THE DEHYDRATED PRODUCT OF (A) WITH AT LEAST A STOICHIOMETRIC AMOUNT OF AN OXYGEN CONTAINING GAS, AT A TEMPERATURE IN THE RANGE OF 400* TO 1,200*C., TO PRODUCE CHLORINE, IRON OXIDE AND UNREACTED CHLORIDES.
Claim 22
Dependent Claim
79 words
AT LEAST SUFFICIENT AMOUNT OF HYDROGEN CHLORIDE OR HYDROCHLORIC ACID TO REACT WITH IRON OXIDES A AT A TEMPERATURE IN THE RANGE OF 180* TO 310*C. AND DISTILLING ALL OF THE WATER AS WATER OR HYDROCHLORIC ACID TO PRODUCE A DEHYDRATED PRODUCT; AND B. REACTING THE DEHYDRATED PRODUCT OF (A) WITH AT LEAST A STOICHIOMETRIC AMOUNT OF AN OXYGEN CONTAINING GAS, AT A TEMPERATURE IN THE RANGE OF 400* TO 1,200*C., TO PRODUCE CHLORINE, IRON OXIDE AND UNREACTED CHLORIDES.
Claim 23
Dependent Claim
23 words
The process of claim 3 wherein the dehydrated product is contacted with air at a temperature in the range of 400* to 650*C.
Claim 24
Dependent Claim
46 words
The process of claim 1 wherein unreacted anhydrous iron chlorides are mixed with the dehydrated product and the mixture formed thereby is reacted with an oxygen-containing gas at a temperature in the range of 400* to 1,200*C. to produce chlorine, iron oxide and additional unreacted chlorides.
Claim 25
Dependent Claim
22 words
The process of claim 1 wherein n is in the range of 0.5 to 6. and the alkali-metal chloride is sodium chloride.
Claim 26
Dependent Claim
26 words
The process of claim 1 wherein the alkali-metal chloride is sodium chloride and the mole ratio of sodium chloride to ferric chloride is 1:1 to 1.8:1.
Claim 27
Dependent Claim
16 words
The process of claim 1 wherein the oxygen-containing gas is oxygen, air or oxygen enriched air.
Claim 28
Dependent Claim
44 words
The process of claim 1 wherein the mole ratio Of oxygen used is in the range of the stoichiometric moles of oxygen required to oxidize the ferric chloride used to 3.0 times the stoichiometric moles of oxygen required to oxidize the ferric chloride used.
Claim 29
Dependent Claim
21 words
The process of claim 1, wherein the dehydrated product contains 0.5 to 50%, by weight, of ferrous chloride or ferric chloride.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |