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US4090958A
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Coal processing system for producing a stream of flowable insoluble coal products
Assignee: Kerr McGee Corp
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Filing: 1976-02-23
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Granted: 1978-05-23
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Expires: 1996-02-23
Abstract
Abstract An improved coal processing system wherein a feed mixture (including coal, dissolving solvent, insoluble coal products and soluble coal products) at a first temperature level is separated in a first separation zone into a heavy fraction including the insoluble coal products and a light fraction and, thereafter, the heavy fraction is withdrawn from the first separation zone and heated to a second temperature level higher than the first temperature level and in which the second temperature level is sufficiently high to produce a heavy fraction that is flowable.
Inventors
- 👤 Robert Edward Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:42
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
335 words
A process comprising: providing a feed mixture comprising a dissolving solvent, insoluble coal products and soluble coal products, said dissolving solvent consisting essentially of at least one substance having a critical temperature below 800° F. selected from the group consisting of aromatic hydrocarbons having a single benzene nucleus and normal boiling points below about 310° F., cycloparaffin hydrocarbons having normal boiling points below about 310° F., open chain mono-olefin hydrocarbons having normal boiling points below about 310° F., open chain saturated hydrocarbons having normal boiling points below about 310° F., mono-, di, and tri-open chain amines containing from about 2-8 carbon atoms, carbocyclic amines having a monocyclic structure containing from about 6-9 carbon atoms, heterocyclic amines containing from about 5-9 carbon atoms, and phenols containing from about 6-9 carbon atoms and their homologs; introducing the feed mixture into a first separation zone; maintaining the first separation zone at a first temperature level lower than about 680° F. and the pressure level in the first separation zone higher than about 600 psig; separating the feed mixture in the first separation zone at the first temperature and pressure level into a first heavy fraction comprising the insoluble coal products and a light fraction comprising the soluble coal products; withdrawing the first heavy fraction from the first separation zone; heating the first heavy fraction to a second temperature level higher than the first temperature level to produce a flowable first heavy fraction; passing the heated first heavy fraction into a second separation zone; maintaining the second separation zone temperature level at about the same as the second temperature level and the pressure level in the second separation zone in a range of about 690 psig to about 1490 psig; separating the first heavy fraction in the second separation zone into a second heavy fraction comprising the insoluble coal products and a second light fraction comprising a portion of the dissolving solvent; and withdrawing the second heavy fraction from the second separation zone, the second heavy fraction being flowable.
Claim 2
Dependent Claim
335 words
A process comprising: providing a feed mixture comprising a dissolving solvent, insoluble coal products and soluble coal products, said dissolving solvent consisting essentially of at least one substance having a critical temperature below 800° F. selected from the group consisting of aromatic hydrocarbons having a single benzene nucleus and normal boiling points below about 310° F., cycloparaffin hydrocarbons having normal boiling points below about 310° F., open chain mono-olefin hydrocarbons having normal boiling points below about 310° F., open chain saturated hydrocarbons having normal boiling points below about 310° F., mono-, di, and tri-open chain amines containing from about 2-8 carbon atoms, carbocyclic amines having a monocyclic structure containing from about 6-9 carbon atoms, heterocyclic amines containing from about 5-9 carbon atoms, and phenols containing from about 6-9 carbon atoms and their homologs; introducing the feed mixture into a first separation zone; maintaining the first separation zone at a first temperature level lower than about 680° F. and the pressure level in the first separation zone higher than about 600 psig; separating the feed mixture in the first separation zone at the first temperature and pressure level into a first heavy fraction comprising the insoluble coal products and a light fraction comprising the soluble coal products; withdrawing the first heavy fraction from the first separation zone; heating the first heavy fraction to a second temperature level higher than the first temperature level to produce a flowable first heavy fraction; passing the heated first heavy fraction into a second separation zone; maintaining the second separation zone temperature level at about the same as the second temperature level and the pressure level in the second separation zone in a range of about 690 psig to about 1490 psig; separating the first heavy fraction in the second separation zone into a second heavy fraction comprising the insoluble coal products and a second light fraction comprising a portion of the dissolving solvent; and withdrawing the second heavy fraction from the second separation zone, the second heavy fraction being flowable.
Claim 3
Dependent Claim
32 words
The process of claim 1 defined further to include the step of: reducing the pressure level of the second heavy fraction after withdrawing such second heavy fraction from the second separation zone.
Claim 4
Dependent Claim
108 words
The process of claim 1 defined further to include the steps of: passing the second heavy fraction into a third separation zone; maintaining the temperature level in the third separation zone in a range of 500° F. to about 600° F. and the pressure level in the third separation zone below the pressure level in the second separation zone; separating the second heavy fraction in the third separation zone into a third heavy fraction comprising the insoluble coal products and a third light fraction comprising a portion of the dissolving solvent; and withdrawing the third heavy fraction from the third separation zone, the third heavy fraction being flowable.
Claim 5
Dependent Claim
28 words
The process of claim 3 wherein the third heavy fraction is defined further as having a viscosity in the range of about 500 centipoise to about 200,000 centipoise.
Claim 6
Dependent Claim
26 words
The process of claim 1 wherein the pressure level in the first separation zone is in a range of about 600 psig to about 1500 psig.
Claim 7
Dependent Claim
56 words
The process of claim 1 wherein the first light fraction includes the dissolving solvent, and wherein the process is defined further to include the steps of: withdrawing the first light fraction from the first separation zone; recovering the dissolving solvent from the first light fraction; and withdrawing the soluble coal products from the first light fraction.
Claim 8
Dependent Claim
27 words
The process of claim 6 defined to include the step of: passing the dissolving solvent recovered from the first light fraction into contact with the feed mixture.
Claim 9
Dependent Claim
28 words
The process of claim 1 wherein the first heavy fraction is defined further as having a viscosity in the range of about 1000 centipoise to about 50,000 centipoise.
Claim 10
Dependent Claim
28 words
The process of claim 1 wherein the second heavy fraction is defined further as having a viscosity in the range of about 1000 centipoise to about 50,000 centipoise.
Claim 11
Dependent Claim
320 words
A process comprising: providing a feed mixture comprising a dissolving solvent, insoluble coal products and soluble coal products, said dissolving solvent consisting essentially of at least one substance having a critical temperature below 800° F. selected from the group consisting of aromatic hydrocarbons having a single benzene nucleus and normal boiling points below about 310° F., cycloparaffin hydrocarbons having normal boiling points below about 310° F., open chain mono-olefin hydrocarbons having normal boiling points below about 310° F., open chain saturated hydrocarbons having normal boiling points below about 310° F., mono-, di, and tri-open chain amines containing from about 2-8 carbon atoms, carbocyclic amines having a monocyclic structure containing from about 6-9 carbon atoms, heterocyclic amines containing from about 5-9 carbon atoms, and phenols containing from about 6-9 carbon atoms and their homologs; introducing the feed mixture into a first separation zone; maintaining the first separation zone at a first temperature level lower than about 680° F. and the pressure level in the first separation zone higher than about 600 psig; separating the feed mixture in the first separation zone at the first temperature and pressure level into a first heavy fraction comprising the insoluble coal products and a light fraction comprising the soluble coal products; withdrawing the first heavy fraction from the first separation zone; heating the first heavy fraction to a second temperature level higher than the first temperature level to produce a flowable first heavy fraction; passing the first heavy fraction into another separation zone; maintaining the temperature level in the said another separation zone in a range of from about 500° F. to about 600° F. and the pressure level below the pressure level in the first separation zone; separating the first heavy fraction in said another separation zone into another heavy fraction comprising the insoluble coal products and another light fraction comprising a portion of the dissolving solvent; and withdrawing both fractions in flowable form.
Claim 12
Dependent Claim
320 words
A process comprising: providing a feed mixture comprising a dissolving solvent, insoluble coal products and soluble coal products, said dissolving solvent consisting essentially of at least one substance having a critical temperature below 800° F. selected from the group consisting of aromatic hydrocarbons having a single benzene nucleus and normal boiling points below about 310° F., cycloparaffin hydrocarbons having normal boiling points below about 310° F., open chain mono-olefin hydrocarbons having normal boiling points below about 310° F., open chain saturated hydrocarbons having normal boiling points below about 310° F., mono-, di, and tri-open chain amines containing from about 2-8 carbon atoms, carbocyclic amines having a monocyclic structure containing from about 6-9 carbon atoms, heterocyclic amines containing from about 5-9 carbon atoms, and phenols containing from about 6-9 carbon atoms and their homologs; introducing the feed mixture into a first separation zone; maintaining the first separation zone at a first temperature level lower than about 680° F. and the pressure level in the first separation zone higher than about 600 psig; separating the feed mixture in the first separation zone at the first temperature and pressure level into a first heavy fraction comprising the insoluble coal products and a light fraction comprising the soluble coal products; withdrawing the first heavy fraction from the first separation zone; heating the first heavy fraction to a second temperature level higher than the first temperature level to produce a flowable first heavy fraction; passing the first heavy fraction into another separation zone; maintaining the temperature level in the said another separation zone in a range of from about 500° F. to about 600° F. and the pressure level below the pressure level in the first separation zone; separating the first heavy fraction in said another separation zone into another heavy fraction comprising the insoluble coal products and another light fraction comprising a portion of the dissolving solvent; and withdrawing both fractions in flowable form.
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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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |