US3865547A - Preventing corrosion during the pipeline transportation of coal slurries - Google Patents

Preventing corrosion during the pipeline transportation of coal slurries Download PDF

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Publication number
US3865547A
US3865547A US166851A US16685171A US3865547A US 3865547 A US3865547 A US 3865547A US 166851 A US166851 A US 166851A US 16685171 A US16685171 A US 16685171A US 3865547 A US3865547 A US 3865547A
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US
United States
Prior art keywords
coal
slurry
pipeline
water slurry
inhibitor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US166851A
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English (en)
Inventor
Paul E Titus
Gregorio Joseph S Di
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell USA Inc
Original Assignee
Shell Oil Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shell Oil Co filed Critical Shell Oil Co
Priority to US166851A priority Critical patent/US3865547A/en
Priority to ZA724617A priority patent/ZA724617B/xx
Priority to AU44632/72A priority patent/AU458309B2/en
Priority to CA147,506A priority patent/CA975150A/en
Priority to GB3474972A priority patent/GB1356722A/en
Priority to FR7227055A priority patent/FR2147249B1/fr
Priority to JP7470372A priority patent/JPS5545600B1/ja
Priority to DE2237184A priority patent/DE2237184C3/de
Application granted granted Critical
Publication of US3865547A publication Critical patent/US3865547A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/30—Conveying materials in bulk through pipes or tubes by liquid pressure

Definitions

  • ABSTRACT A method for rendering a coal-water slurry noncorrosive to a pipeline during pipeline transportation of the slurry by admixing therewith, and maintaining therein, a hexavalent chromate corrosion inhibitor in combination with a minor amount of less than 1000 ppm of an inhibitor saving additive selected from the group consisting of gelatin and a reaction product of an alkyl phenol and an alkylene oxide.
  • An object of the present invention is to prepare a corrosion resistant coal slurry.
  • Still another object of the present invention is to prepare a non-clogging or non-plugging, corrosion resistant coal slurry in a liquid carrier.
  • Still another object of the present invention is to prepare a non-clogging or non-plugging, corrosion resistant coal-water slurry for pipeline transportation.
  • Still another object of the present invention is to pipeline transport a coal slurry which is non-clogging and non-plugging and does not cause corrosion of the interior of the pipeline or equipment handling said slurry.
  • Still another object of the present invention is to pipeline transport a coal-water slurry which is resistant toward corrosion and plugging and can be readily restarted after pipeline shutdown if and when required.
  • Still another object of the present invention is to transport non-corrosive non-clogging coal slurries over great distances under conditions of reduced pumping and handling costs.
  • the polar-containing compound e.g., gelatin as well as other improving agents such as friction reducers, viscosity controlling agents can be incorporated into coal slurry compositions containing the chromate during the preparation of the slurry or after the slurry has been prepared and injected into the pipeline and these additives can be injected simultaneously or sequentially; and if this is done, the improving agent should be added first.
  • coal particles of from l4+30 to 325 mesh in an amount of from about 10 percent to about 60 percent or higher are slurried into a liquid carrier such as a liquid aqueous medium and during or after, simultaneously or sequentially, from about 10 to 1000 ppm each of a chromate compound and a water-soluble polar-containing compound as defined is addedto the slurry and admixed to form a homogeneous mass.
  • a liquid carrier such as a liquid aqueous medium
  • the coal slurry can then be injected into a pipeline for transportation over great distances without causing corrosion, plugging and on shutdown, the slurry can be re-started without any difficulties.
  • An option is to prepare the coal slurry, inject it into a pipeline, and while the slurry is being pumped to a terminal station injecting, simultaneously, sequentially and/or in increments, the chromate and polarcontaining compound having high affinity for coal adsorption.
  • Coal slurries made from coal particles in the size range of the present invention resist attrition while being pipeline transported.
  • the coal particles from different fields useful in making slurries of the present invention are illustrated in Tables 1 and II, at varying velocities of transportation over large distances.
  • the chromates useful as corrosion inhibitors in coal slurry compositions of the present invention include hexavalent chromates, preferably the water-soluble chromates such as alkali metal chromates, e.g., Na and- /or K chromates (Na CrO and/or K CrO).
  • the water-soluble polar-containing compound having high affinity for adsorption on coal particles used in conjunction with the chromate and which prevents the chromate from being adsorbed on the coal but rather onto the pipeline wall thereby rendering the pipeline resistant to erosion and corrosion, include: watersoluble oxygen-containing materials such as reaction products of alkylene oxide, e.g., ethylene and/or propylene oxide
  • the pH of the Crowsnest coal/water slurry did not vary with time, but remained at about 5.5 to 6.0 with distilled water as the carrier, indicating that no additional acidic components were extracted from the coal.
  • Gelatin consists of large organic molecules that cover up active adsorption sites on the coal surface. As shown by the upper curve in FIG. 1, the addition of 10 ppm of gelatin to the coal/water slurry retarded the oxygen depletion previously observed.
  • Test duration 7 days.
  • Coal sample had particle size distribution as shown in Table 111 Sample 1. Basis total slurry.
  • An added feature of coal slurry compositions of the present invention containing chromates and polarcontaining adsorbents is that attrition of the coal particles in the slurry is essentially inhibited, thereby reducing the problem of plugging of the pipeline and facilitating restart whenever necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Liquid Carbonaceous Fuels (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
US166851A 1971-07-28 1971-07-28 Preventing corrosion during the pipeline transportation of coal slurries Expired - Lifetime US3865547A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US166851A US3865547A (en) 1971-07-28 1971-07-28 Preventing corrosion during the pipeline transportation of coal slurries
ZA724617A ZA724617B (en) 1971-07-28 1972-07-05 Non-corrosive coal slurries
AU44632/72A AU458309B2 (en) 1971-07-28 1972-07-17 Noncorrosive coal slurries
CA147,506A CA975150A (en) 1971-07-28 1972-07-19 Non-corrosive coal slurries
GB3474972A GB1356722A (en) 1971-07-28 1972-07-25 Methods of pipeline transporting and compositions of non-corrosive coal slurries
FR7227055A FR2147249B1 (Direct) 1971-07-28 1972-07-27
JP7470372A JPS5545600B1 (Direct) 1971-07-28 1972-07-27
DE2237184A DE2237184C3 (de) 1971-07-28 1972-07-28 Verfahren zum Transport von aufgeschlämmter Kohle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US166851A US3865547A (en) 1971-07-28 1971-07-28 Preventing corrosion during the pipeline transportation of coal slurries

Publications (1)

Publication Number Publication Date
US3865547A true US3865547A (en) 1975-02-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US166851A Expired - Lifetime US3865547A (en) 1971-07-28 1971-07-28 Preventing corrosion during the pipeline transportation of coal slurries

Country Status (8)

Country Link
US (1) US3865547A (Direct)
JP (1) JPS5545600B1 (Direct)
AU (1) AU458309B2 (Direct)
CA (1) CA975150A (Direct)
DE (1) DE2237184C3 (Direct)
FR (1) FR2147249B1 (Direct)
GB (1) GB1356722A (Direct)
ZA (1) ZA724617B (Direct)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996058A (en) * 1974-07-12 1976-12-07 Bechtel International Corporation Inhibition of corrosion in a pipeline carrying a slurry
US4223691A (en) * 1978-12-26 1980-09-23 Shell Oil Company Additives to improve the pipeline transportation of cold water slurries
US4316505A (en) * 1979-01-12 1982-02-23 Lammiman Steven A Pumping of aqueous slurries
US20080090071A1 (en) * 2004-10-21 2008-04-17 Commissariat A L'energie Atomique Nanosturctured Coating and Coating Method

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2128913A (en) * 1936-02-03 1938-09-06 Standard Oil Co Coal handling
US2346151A (en) * 1940-05-18 1944-04-11 Standard Oil Co Process of treating coal
US2791472A (en) * 1954-05-04 1957-05-07 Consolidation Coal Co Method of reducing metal losses in coal slurry transportation pipelines
US2920923A (en) * 1959-02-11 1960-01-12 Consolidation Coal Co Slurry pipeline transportation
US3012826A (en) * 1960-04-28 1961-12-12 Ruhrgas Ag Hydraulic conveying method
US3304267A (en) * 1964-04-13 1967-02-14 Leo D Miller Method of inhibiting rust and corrosion in a fuel oil tank
US3445400A (en) * 1965-12-27 1969-05-20 Midwest Chem & Processing Co I Chromate corrosion inhibiting composition containing surface-active agents
US3487018A (en) * 1968-04-12 1969-12-30 Nalco Chemical Co Scale and corrosion control in cooling waters
US3524682A (en) * 1962-03-07 1970-08-18 American Cyanamid Co Coal suspension pumping using polyelectrolytes
US3666404A (en) * 1969-11-05 1972-05-30 Chemed Corp Method of inhibiting corrosion in aqueous systems with high molecular weight alkylene oxide polymers

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2128913A (en) * 1936-02-03 1938-09-06 Standard Oil Co Coal handling
US2346151A (en) * 1940-05-18 1944-04-11 Standard Oil Co Process of treating coal
US2791472A (en) * 1954-05-04 1957-05-07 Consolidation Coal Co Method of reducing metal losses in coal slurry transportation pipelines
US2920923A (en) * 1959-02-11 1960-01-12 Consolidation Coal Co Slurry pipeline transportation
US3012826A (en) * 1960-04-28 1961-12-12 Ruhrgas Ag Hydraulic conveying method
US3524682A (en) * 1962-03-07 1970-08-18 American Cyanamid Co Coal suspension pumping using polyelectrolytes
US3304267A (en) * 1964-04-13 1967-02-14 Leo D Miller Method of inhibiting rust and corrosion in a fuel oil tank
US3445400A (en) * 1965-12-27 1969-05-20 Midwest Chem & Processing Co I Chromate corrosion inhibiting composition containing surface-active agents
US3487018A (en) * 1968-04-12 1969-12-30 Nalco Chemical Co Scale and corrosion control in cooling waters
US3666404A (en) * 1969-11-05 1972-05-30 Chemed Corp Method of inhibiting corrosion in aqueous systems with high molecular weight alkylene oxide polymers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996058A (en) * 1974-07-12 1976-12-07 Bechtel International Corporation Inhibition of corrosion in a pipeline carrying a slurry
US4223691A (en) * 1978-12-26 1980-09-23 Shell Oil Company Additives to improve the pipeline transportation of cold water slurries
US4316505A (en) * 1979-01-12 1982-02-23 Lammiman Steven A Pumping of aqueous slurries
US20080090071A1 (en) * 2004-10-21 2008-04-17 Commissariat A L'energie Atomique Nanosturctured Coating and Coating Method

Also Published As

Publication number Publication date
AU458309B2 (en) 1975-02-27
ZA724617B (en) 1973-04-25
AU4463272A (en) 1974-01-24
DE2237184A1 (de) 1973-02-15
DE2237184C3 (de) 1980-04-10
CA975150A (en) 1975-09-30
DE2237184B2 (de) 1979-08-09
JPS5545600B1 (Direct) 1980-11-18
FR2147249B1 (Direct) 1976-08-13
FR2147249A1 (Direct) 1973-03-09
GB1356722A (en) 1974-06-12

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