Patent US4178088A successfully refreshed from Google Patents.
Patent US4430196A successfully refreshed from Google Patents.
US4430196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for neutralizing acidic components in petroleum refining units
Assignee: Veolia WTS USA Inc
•
Filing: 1983-03-28
•
Granted: 1984-02-07
•
Expires: 2003-03-28
Abstract
Abstract Methods and compositions are disclosed for neutralizing acidic components in petroleum refining units. The neutralizing agent comprises a member selected from the group of dimethylaminoethanol and dimethylisopropanolamine. The neutralizing agent may be added directly to the charge, in a reflux line, or directly to the overhead line of the refining unit. In those instances in which sour crude is to be refined, it is desirable that dimethylisopropanolamine be used in conjunction with the dimethylaminoethanol. The neutralizing agents are added in an amount sufficient to elevate the pH of the condensate (as measured at the accumulator) to within the pH range of 4.5-7.
Inventors
- 👤 Joseph H. Y. Niu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:16
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/04; C10; C10G; C10G7/00; C10G7/10; C23F11/08; C23F11/10; C23F11/14; C23F11/141; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
39 words
A process for neutralizing acidic components of a distilling petroleum product in a refining unit comprising adding a neutralizing amount of a member selected from the group consisting of dimethylaminoethanol and dimethylisopropanolamine, and mixtures thereof, to said petroleum product.
Claim 2
Dependent Claim
39 words
A process for neutralizing acidic components of a distilling petroleum product in a refining unit comprising adding a neutralizing amount of a member selected from the group consisting of dimethylaminoethanol and dimethylisopropanolamine, and mixtures thereof, to said petroleum product.
Claim 3
Dependent Claim
20 words
A process as recited in claim 1 wherein said member is added to the overhead line of the distilling unit.
Claim 4
Dependent Claim
34 words
A process as recited in claim 1 wherein an aqueous condensate is formed and wherein a sufficient amount of said member is added to maintain the pH of the condensate to between about 4.5-7.0.
Claim 5
Dependent Claim
19 words
A process as recited in claim 1 wherein said member is added to the charge to said refining unit.
Claim 6
Dependent Claim
20 words
A process as recited in claim 1 wherein said member is added to a reflux line of said refining unit.
Claim 7
Dependent Claim
35 words
A process as recited in claim 3 further comprising adding both dimethylpropanolamine amine and dimethylaminoethanol to said refining unit; the weight ratio of said dimethylaminoethanol (DMAE) to said dimethylpropanolamine (DMPA) being from about 1-10:10-1 DMAE:DMPA.
Claim 8
Dependent Claim
20 words
A process as recited in claim 6 wherein the weight ratio of said DMAE to said DMPA is about 3:1.
Claim 9
Dependent Claim
77 words
A process for neutralizing acidic components of a sour crude oil charge in a refining unit in which distillation is taking place and in which an aqueous condensate is formed, said sour crude oil being characterized by providing at least about 50 ppm of H 2 S in the condensate, said process comprising adding a neutralizing amount of a member selected from the group consisting of dimethylaminoethanol and dimethylisopropanolamine, and mixtures thereof, to said sour crude oil.
Claim 10
Dependent Claim
77 words
A process for neutralizing acidic components of a sour crude oil charge in a refining unit in which distillation is taking place and in which an aqueous condensate is formed, said sour crude oil being characterized by providing at least about 50 ppm of H 2 S in the condensate, said process comprising adding a neutralizing amount of a member selected from the group consisting of dimethylaminoethanol and dimethylisopropanolamine, and mixtures thereof, to said sour crude oil.
Claim 11
Dependent Claim
20 words
A process as recited in claim 8 wherein said member is added to the overhead line of said refining unit.
Claim 12
Dependent Claim
27 words
A process as recited in claim 8 wherein said member is added in an amount sufficient to maintain the pH of the condensate to between about 5.0-7.0.
Claim 13
Dependent Claim
19 words
A process as recited in claim 8 wherein said member is added to the charge to said refining unit.
Claim 14
Dependent Claim
20 words
A process as recited in claim 8 wherein said member is added to a reflux line of said refining unit.
Claim 15
Dependent Claim
75 words
A process for neutralizing acidic components of a sour crude oil charge in a refining unit in which distillation is taking place and in which an aqueous condensate is formed, said crude oil being characterized by providing at least about 50 ppm of H 2 S in the condensate (based upon one million parts water in said condensate), said process comprising adding a neutralizing amount of dimethylaminoethanol (DMAE) and dimethylisopropanolamine (DMIPA) to said sour crude.
Claim 16
Dependent Claim
75 words
A process for neutralizing acidic components of a sour crude oil charge in a refining unit in which distillation is taking place and in which an aqueous condensate is formed, said crude oil being characterized by providing at least about 50 ppm of H 2 S in the condensate (based upon one million parts water in said condensate), said process comprising adding a neutralizing amount of dimethylaminoethanol (DMAE) and dimethylisopropanolamine (DMIPA) to said sour crude.
Claim 17
Dependent Claim
24 words
A process as recited in claim 13 wherein the weight ratio of said dimethylaminoethanol (DMAE) to said dimethylisopropanolamine (DMIPA) being from about 1-10:10-1 DMAE:DMIPA.
Claim 18
Dependent Claim
32 words
A process as recited in claim 13 wherein said DMAE and said DMIPA are added in an amount sufficient to place the pH of said condensate within the range of about 5-7.
Claim 19
Dependent Claim
20 words
A process as recited in claim 15 wherein the weight ratio of said DMAE to said DMIPA is about 3:1.
Claim 20
Dependent Claim
19 words
A process as recited in claim 16 wherein said DMAE and said DMIPA are both added to said charge.
Claim 21
Dependent Claim
24 words
A process as recited in claim 16 wherein said DMAE and said DMIPA are both added to a reflux line of said refining unit.
Claim 22
Dependent Claim
24 words
A process as recited in claim 16 wherein said DMAE and said DMIPA are both added to the overhead line of the distilling unit.
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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |