US4201665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of nonstoichiometric carbon-sulfur compounds to remove components from liquids
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1978-01-03
•
Granted: 1980-05-06
•
Expires: 1998-01-03
Abstract
Abstract Nonstoichiometric carbon-sulfur compounds have been found to be effective adsorbents for removing a wide variety of organic and/or inorganic materials from liquids, preferably polar liquids. Removal of biorefractory organics, such as aromatics, is particularly effective using such compounds. The spent adsorbent may then be regenerated.
Inventors
- 👤 David W. Savage
- 👤 Chin H. Chang
- 👤 John M. Longo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:06
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/281; B; B01; B01J; B01J20/00; B01J20/02; B01J20/0203; B01J20/0262; B01J20/0266; B01J20/20; B01J20/28; B01J20/28054; B01J20/28057; B01J20/30; B01J20/34; B01J20/3416; B01J20/3483; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903; Y10S210/904; Y10S210/908; Y10S210/909
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
73 words
A process for removing dissolved organic materials, dissolved inorganic materials or mixtures thereof from a liquid which comprises contacting said liquid with a nonstoichiometric carbon-sulfur compound of the formula C x S, where x ranges from 4 to about 50, said compound having a surface area of at least 300 square meters per gram, for a period of time sufficient to adsorb at least a portion of said dissolved materials from said liquid.
Claim 2
Dependent Claim
73 words
A process for removing dissolved organic materials, dissolved inorganic materials or mixtures thereof from a liquid which comprises contacting said liquid with a nonstoichiometric carbon-sulfur compound of the formula C x S, where x ranges from 4 to about 50, said compound having a surface area of at least 300 square meters per gram, for a period of time sufficient to adsorb at least a portion of said dissolved materials from said liquid.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein x ranges from 4 to about 10.
Claim 4
Dependent Claim
36 words
The process of claim 1 wherein the C x S has a surface area ranging between 300 and about 2500 square meters per gram and a pore volume of at least 0.2 cubic centimeters per gram.
Claim 5
Dependent Claim
10 words
The process of claim 1 wherein said liquid is polar.
Claim 6
Dependent Claim
26 words
The process of claim 1 wherein said dissolved inorganic materials are selected from the group consisting of metal ions, metalloid ions, cyanides, thiocyanates and mixtures thereof.
Claim 7
Dependent Claim
28 words
The process of claim 1 wherein said dissolved organic materials are selected from the group consisting of aromatic hydrocarbons, phenolic hydrocarbons, halogenated hydrocarbons, nitrated hydrocarbons and mixtures thereof.
Claim 8
Dependent Claim
10 words
The process of claim 1 wherein said liquid is non-aqueous.
Claim 9
Dependent Claim
12 words
The process of claim 7 wherein said non-aqueous liquid is a hydrocarbon.
Claim 10
Dependent Claim
10 words
The process of claim 7 wherein said liquid is polar.
Claim 11
Dependent Claim
20 words
The process of claim 1 wherein said liquid, after contacting said nonstoichiometric carbon-sulfur compound, contacts a bed of activated carbon.
Claim 12
Dependent Claim
41 words
The process of claim 1 wherein the adsorption of said dissolved materials causes a reduction in the adsorptive capacity of said nonstoichiometric carbon-sulfur compounds, said compounds being regenerated by removing at least a portion of said adsorbed materials from said compounds.
Claim 13
Dependent Claim
30 words
The process of claim 1 wherein the C x S compound is regenerated by removing at least a portion of the dissolved materials adsorbed by the C x S compound.
Claim 14
Dependent Claim
14 words
The process of claim 12 wherein x ranges from about 4 to about 10.
Claim 15
Dependent Claim
35 words
The process of claim 12 wherein the C x S has a surface area ranging between 300 and 2500 square meters per gram and a pore volume of at least 0.2 cubic centimeters per gram.
Claim 16
Dependent Claim
39 words
The process of claim 12 wherein said removal is effected by contacting said nonstoichiometric carbonsulfur compound with a stripping gas for a period of time sufficient to remove at least a portion of said dissolved materials from said compound.
Claim 17
Dependent Claim
23 words
The process of claim 15 wherein said stripping gas is selected from the group consisting of steam, inert gas, alcohols and mixtures thereof.
Claim 18
Dependent Claim
11 words
The process of claim 16 wherein said stripping gas comprises steam.
Claim 19
Dependent Claim
44 words
The process of claim 12 wherein said removal is effected by heating said compound at a temperature between about 70° and about 1200° F. for a period of time sufficient to remove at least a portion of said materials from said nonstoichiometric carbon-sulfur compound.
Claim 20
Dependent Claim
18 words
The process of claim 18 wherein said compound is heated at a temperature between 150° and 700° F.
Claim 21
Dependent Claim
15 words
The process of claim 18 wherein an inert gas is used as a heat carrier.
Claim 22
Dependent Claim
46 words
The process of claim 1 wherein the C x S compound is regenerated by contacting the C x S compound with a liquid solvent for a period of time sufficient to remove at least a portion of dissolved materials absorbed by the C x S compound.
Claim 23
Dependent Claim
12 words
The process of claim 21 wherein said liquid solvent is a hydrocarbon.
Claim 24
Dependent Claim
29 words
The process of claim 22 wherein said liquid solvent is a branched hydrocarbon having at least one tri-substituted carbon atom, at least one tetra-substituted carbon atom or mixtures thereof.
Claim 25
Dependent Claim
19 words
The process of claim 23 wherein said liquid solvent is a hydrocarbon having at least one tetra-substituted carbon atom.
Claim 26
Dependent Claim
11 words
The process of claim 21 wherein said liquid solvent comprises water.
Claim 27
Dependent Claim
19 words
The process of claim 21 wherein the temperature during said contacting ranges from about 70° to about 700° F.
Claim 28
Dependent Claim
19 words
The process of claim 26 wherein the temperature during said contacting ranges from about 100° to about 500° F.
Claim 29
Dependent Claim
22 words
The process of claim 21 wherein the nonstoichiometric carbon-sulfur compound is contacted with a stripping gas after contact with said liquid solvent.
Claim 30
Dependent Claim
11 words
The process of claim 28 wherein said stripping gas is steam.
Claim 31
Dependent Claim
21 words
The process of claim 21 wherein the dissolved materials removed from said nonstoichiometric carbon-sulfur compound are recovered from said liquid solvent.
Claim 32
Dependent Claim
74 words
A process for removing dissolved organic materials, dissolved inorganic materials or mixtures thereof from an aqueous liquid which comprises contacting said liquid with a nonstoichiometric carbon-sulfur compound of the formula C x S where x ranges from 4 to about 50, said compound having a surface area of at least 300 square meters per gram for a period of time sufficient to adsorb at least a portion of said dissolved materials from said liquid.
Claim 33
Dependent Claim
74 words
A process for removing dissolved organic materials, dissolved inorganic materials or mixtures thereof from an aqueous liquid which comprises contacting said liquid with a nonstoichiometric carbon-sulfur compound of the formula C x S where x ranges from 4 to about 50, said compound having a surface area of at least 300 square meters per gram for a period of time sufficient to adsorb at least a portion of said dissolved materials from said liquid.
Claim 34
Dependent Claim
14 words
The process of claim 31 wherein x ranges from about 4 to about 10.
Claim 35
Dependent Claim
35 words
The process of claim 31 wherein said carbon-sulfur compound has a surface area ranging between 300 and about 2500 square meters per gram and a pore volume of at least 0.2 cubic centimeters per gram.
Claim 36
Dependent Claim
28 words
The process of claim 31 wherein said dissolved organic materials are selected from the group consisting of aromatic hydrocarbons, phenolic hydrocarbons, halogenated hydrocarbons, nitrated hydrocarbons and mixtures thereof.
Claim 37
Dependent Claim
14 words
The process of claim 34 wherein said dissolved organic materials comprise an aromatic hydrocarbon.
Claim 38
Dependent Claim
26 words
The process of claim 31 wherein said dissolved inorganic materials are selected from the group consisting of metal ions, metalloid ions, cyanides, thiocyanates and mixtures thereof.
Claim 39
Dependent Claim
13 words
The process of claim 36 wherein said dissolved inorganic materials comprise metal ions.
Claim 40
Dependent Claim
104 words
A process for removing dissolved organic materials, dissolved inorganic materials or mixtures thereof from a liquid which comprises (a) contacting said liquid with a nonstoichiometric carbon-sulfur compound of the formula C x S, where x ranges from 4 to about 50, said compound having a surface area of at least 300 square meters per gram, for a period of time sufficient to adsorb at least a portion of said dissolved materials from said liquid onto said compound, thereby reducing the adsorptive capacity of said compound, (b) regenerating said nonstoichiometric carbon-sulfur compound by removing at least a portion of said dissolved materials from said compound.
Claim 41
Dependent Claim
104 words
A process for removing dissolved organic materials, dissolved inorganic materials or mixtures thereof from a liquid which comprises (a) contacting said liquid with a nonstoichiometric carbon-sulfur compound of the formula C x S, where x ranges from 4 to about 50, said compound having a surface area of at least 300 square meters per gram, for a period of time sufficient to adsorb at least a portion of said dissolved materials from said liquid onto said compound, thereby reducing the adsorptive capacity of said compound, (b) regenerating said nonstoichiometric carbon-sulfur compound by removing at least a portion of said dissolved materials from said compound.
Claim 42
Dependent Claim
13 words
The process of claim 38 wherein x ranges from 4 to about 10.
Claim 43
Dependent Claim
36 words
The process of claim 38 wherein the C x S has a surface area ranging from 300 to about 2500 square meters per gram and a pore volume of at least 0.2 cubic centimeters per gram.
Claim 44
Dependent Claim
35 words
The process of claim 38 wherein said regeneration is effected by contacting said compound with a liquid solvent for a period of time sufficient to remove at least a portion of said dissolved materials therefrom.
Claim 45
Dependent Claim
28 words
The process of claim 41 wherein said dissolved organic materials are selected from the group consisting of aromatic hydrocarbons, phenolic hydrocarbons, halogenated hydrocarbons, nitrated hydrocarbons and mixtures thereof.
Claim 46
Dependent Claim
12 words
The process of claim 42 wherein said liquid solvent is a hydrocarbon.
Claim 47
Dependent Claim
26 words
The process of claim 41 wherein said dissolved inorganic materials are selected from the group consisting of metal ions, metalloid ions, cyanides, thiocyanates and mixtures thereof.
Claim 48
Dependent Claim
11 words
The process of claim 44 wherein said liquid solvent comprises water.
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) | 1983-05-06 | 1983-11-05 | 1984-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-06 | 1987-11-05 | 1988-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-06 | 1991-11-05 | 1992-05-06 | $7700.00 | Window Closed / Lapsed |