US4344841A
Expired / Lapsed
US
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Method of removing contaminant from feedstock streams
Assignee: Phillips Petroleum Co
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Filing: 1979-10-01
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Granted: 1982-08-17
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Expires: 1999-10-01
Abstract
Abstract Contaminants such as surfactants, antifoam agents, viscosifying agents, corrosion inhibitors, other agents used in tertiary recovery of enhanced oil recovery operations, and the like are removed from a contaminated feedstock stream by contacting said feedstock stream with an adsorbent selected from montmorillonite clays, amorphous silica, and mixtures thereof with one another and/or with bauxite. In a further aspect, the thus purified feedstock stream is hydrodesulfurized.
Inventors
- 👤 Marvin M. Johnson
- 👤 Gerhard P. Nowack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:16
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/003; B; B01; B01D; B01D15/00; C10G67/00; C10G67/02; C10G67/06
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
58 words
A method for removing at least one contaminant selected from the group consisting of chromates, silicates, phosphates, aldehydes, thiols, sulfides, carboxylates, sulfonates, sulfates, polyoxyethylenes, carboxylic esters, silicone, dimethyl silicone, phenylpolysiloxane, glycols, phthalates, polysaccharides, and cellulosic ethers from a feedstock stream to a catalytic conversion process, the method comprising: contacting the feedstock stream with an adsorbent comprising amorphous silica.
Claim 2
Independent Claim
58 words
A method for removing at least one contaminant selected from the group consisting of chromates, silicates, phosphates, aldehydes, thiols, sulfides, carboxylates, sulfonates, sulfates, polyoxyethylenes, carboxylic esters, silicone, dimethyl silicone, phenylpolysiloxane, glycols, phthalates, polysaccharides, and cellulosic ethers from a feedstock stream to a catalytic conversion process, the method comprising: contacting the feedstock stream with an adsorbent comprising amorphous silica.
Claim 3
Dependent Claim
13 words
The method of claim 1 in which the amorphous silica is silica gel.
Claim 4
Dependent Claim
30 words
The method of claim 2 in which the silica gel is selected from the group consisting of regular density silica gels, intermediate density silica gels, and low density silica gels.
Claim 5
Dependent Claim
45 words
The method of claim 2 in which the silica gel has an apparent density in the range of about 0.30 to about 0.80 and a surface area in the range of about 300 to about 1000 square meters surface area per gram of silica gel.
Claim 6
Dependent Claim
40 words
The method of claim 2 in which the silica gel has an apparent density in the range of about 0.50 to about 0.80 and a surface area within the range of about 700 to about 1000 square meters per gram.
Claim 7
Dependent Claim
12 words
The method of claim 2 in which the adsorbent further comprises bauxite.
Claim 8
Dependent Claim
36 words
The method of claim 6 in which the silica gel has an apparent density in the range of about 0.50 to about 0.80 and a surface area in the range of about 700 to about 1000.
Claim 9
Dependent Claim
32 words
The method of claim 7 in which the silica gel is present in an amount in the range of about 5 to about 75 weight percent, based on the total adsorbent weight.
Claim 10
Dependent Claim
56 words
The method of claim 8 in which the contaminant comprises silicon oil and the contacting of the adsorbent with the feedstock stream is effected at a temperature in the range of about 150° F. to about 350° F., a pressure less than 700 psia, and a weight hourly space velocity of about 1 to about 5.
Claim 11
Dependent Claim
32 words
The method of claim 7 in which the silica gel is present in an amount in the range of about 10 to about 25 weight percent, based on the total adsorbent weight.
Claim 12
Dependent Claim
21 words
The method of claim 2 in which the feedstock stream comprises hydrocarbons having from 5 to 10 carbon atoms per molecule.
Claim 13
Dependent Claim
12 words
The method of claim 2 in which the contaminant comprises silicone oil.
Claim 14
Dependent Claim
22 words
The method of claim 12 in which the contacting is effected at a temperature of from about ambient to about 600° F.
Claim 15
Dependent Claim
23 words
The method of claim 12 in which the contacting is effected at a weight hourly space velocity of about 1 to about 5.
Claim 16
Dependent Claim
18 words
The method of claim 12 in which the contacting is effected at a pressure less than 700 psia.
Claim 17
Independent Claim
81 words
A method of hydrodesulfurizing a petroleum feedstock stream comprising: contacting a petroleum feedstock stream contaminated with at least one of the group consisting of chromates, silicates, phosphates, aldehydes, ketones, thiols, sulfides, carboxylates, sulfonates, sulfates, polyoxyethylenes, carboxylic esters, dimethylsilicone, phenylpolysiloxane, glycols, phthalates, polysaccharides, and cellulosic ethers, with an adsorbent comprising amorphous silica to produce a purified petroleum feedstock stream; and subsequently contacting the purified petroleum feedstock stream with a hydrosulfurization catalyst under conditions effective for hydrodesulfurization to produce a hydrodesulfurized feedstock stream.
Claim 18
Independent Claim
81 words
A method of hydrodesulfurizing a petroleum feedstock stream comprising: contacting a petroleum feedstock stream contaminated with at least one of the group consisting of chromates, silicates, phosphates, aldehydes, ketones, thiols, sulfides, carboxylates, sulfonates, sulfates, polyoxyethylenes, carboxylic esters, dimethylsilicone, phenylpolysiloxane, glycols, phthalates, polysaccharides, and cellulosic ethers, with an adsorbent comprising amorphous silica to produce a purified petroleum feedstock stream; and subsequently contacting the purified petroleum feedstock stream with a hydrosulfurization catalyst under conditions effective for hydrodesulfurization to produce a hydrodesulfurized feedstock stream.
Claim 19
Dependent Claim
23 words
The method of claim 16 which the petroleum feedstock stream comprises hydrocarbons having from about 5 to about 10 carbon atoms per molecule.
Claim 20
Dependent Claim
13 words
The method of claim 17 in which the feedstock contaminant is silicone oil.
Claim 21
Dependent Claim
13 words
The method of claim 18 in which the amorphous silica is silica gel.
Claim 22
Dependent Claim
40 words
The method of claim 19 in which the silica gel has an apparent density in the range of about 0.10 to about 0.80 and a surface area in the range of about 100 to about 1000 square meters per gram.
Claim 23
Dependent Claim
12 words
The method of claim 20 in which the adsorbent further comprises bauxite.
Claim 24
Dependent Claim
31 words
The method of claim 21 in which the silica gel is present in an amount of from about 5 to about 75 weight percent, based on the weight of the adsorbent.
Claim 25
Dependent Claim
47 words
The method of claim 22 in which the contacting of the feedstock stream with the adsorbent is effected at a temperature of from about 150° to about 350° F., a pressure less than 700 psia, and a weight hourly space velocity of about 1 to about 5.
Claim 26
Dependent Claim
35 words
The method of claim 19 in which the silica gel has an apparent density of from about 0.30 to about 0.80 and a surface area from about 300 to about 1000 square meters per gram.
Claim 27
Dependent Claim
36 words
The method of claim 19 in which the silica gel has an apparent density of from about 0.50 to about 0.80 and a surface area of from about 700 to about 1000 square meters per gram.
Claim 28
Independent Claim
77 words
A method of removing at least one contaminant selected from the group consisting of chromates, silicates, phosphates, aldehydes, thiols, sulfides, carboxylates, sulfonates, sulfates, polyoxyethylenes, carboxylic esters, silicone, dimethyl silicone, phenylpolysiloxane, glycols, phthalates, polysaccharides, and cellulosic ethers from a feedstock stream to a catalytic conversion process, the method comprising: contacting the feedstock stream with an adsorbent comprising silica gel and an acid activated montmorillonite clay having an acidity equivalent of from about 0 to about 10 mg KOH/g.
Claim 29
Independent Claim
77 words
A method of removing at least one contaminant selected from the group consisting of chromates, silicates, phosphates, aldehydes, thiols, sulfides, carboxylates, sulfonates, sulfates, polyoxyethylenes, carboxylic esters, silicone, dimethyl silicone, phenylpolysiloxane, glycols, phthalates, polysaccharides, and cellulosic ethers from a feedstock stream to a catalytic conversion process, the method comprising: contacting the feedstock stream with an adsorbent comprising silica gel and an acid activated montmorillonite clay having an acidity equivalent of from about 0 to about 10 mg KOH/g.
Claim 30
Dependent Claim
25 words
The method of claim 26 in which the acid activated montmorillonite clay has the approximate composition Al 2 O 3 .4SiO 2 .H 2 O.
Claim 31
Dependent Claim
12 words
The method of claim 26 in which the adsorbent further comprises bauxite.
Claim 32
Dependent Claim
60 words
The method of claim 28 in which the bauxite comprises about 30 to about 75 percent Al 2 O 3 , about 2 to about 31 percent H 2 O, about 3 to about 25 percent Fe 2 O 3 , about 2 to about 9 percent SiO 2 , and about 1 to about 3 percent TiO 2 .
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |