EP0200074B1 - Stabilisateur pour suspensions aqueuses - Google Patents

Stabilisateur pour suspensions aqueuses Download PDF

Info

Publication number
EP0200074B1
EP0200074B1 EP86105103A EP86105103A EP0200074B1 EP 0200074 B1 EP0200074 B1 EP 0200074B1 EP 86105103 A EP86105103 A EP 86105103A EP 86105103 A EP86105103 A EP 86105103A EP 0200074 B1 EP0200074 B1 EP 0200074B1
Authority
EP
European Patent Office
Prior art keywords
pet
coke
bentonite
stabilizer
weight
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
EP86105103A
Other languages
German (de)
English (en)
Other versions
EP0200074A2 (fr
EP0200074A3 (en
Inventor
Vincenzo Lagana'
Carlo Piccinini
Elio Donati
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.)
SnamProgetti SpA
Original Assignee
SnamProgetti SpA
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 SnamProgetti SpA filed Critical SnamProgetti SpA
Publication of EP0200074A2 publication Critical patent/EP0200074A2/fr
Publication of EP0200074A3 publication Critical patent/EP0200074A3/en
Application granted granted Critical
Publication of EP0200074B1 publication Critical patent/EP0200074B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
    • C10L1/326—Coal-water suspensions

Definitions

  • the present invention relates to a composition
  • a composition comprising an aqueous suspension of pet-coke and an stabilizer.
  • Pet-coke is a high heat value product with low content of ashes, and a great interest exists hence in converting said pet-coke into a fluid product by dispersing it in liquids, in particular in water.
  • the aqueous suspensions of pet-coke can be stabilized by adding to them bentonite in amounts comprised within the range of from 0.2 to 3% by weight relatively to the weight of the suspension.
  • the concentration of pet-coke in water it is usually comprised within the range of from 50% to 80% by weight.
  • the composition contains, in addition to the aqueous suspension of pet-coke and to the bentonite, normal fluidifiers, in particular those obtained by the sulphonation and salifying of coal tar, and possible condensation with formaldehyde, or the non-surfactant anionic polyelectrolytes, in particular those having alkyl-substituted polynuclear aromatic groups and having a molecular weight higher than 300 and preferably comprised within the range of from 500 to 3000.
  • normal fluidifiers in particular those obtained by the sulphonation and salifying of coal tar, and possible condensation with formaldehyde
  • non-surfactant anionic polyelectrolytes in particular those having alkyl-substituted polynuclear aromatic groups and having a molecular weight higher than 300 and preferably comprised within the range of from 500 to 3000.
  • the granulometry of pet-coke in the aqueous suspension is such as to have particles of size lower than 300 1 1m, and preferably the suspension is formed by two groups of particles of different average size, the first group of particles having an average size between 210 11m and 60 11m, whilst the par- tides of the second group have an average size comprised between 1/6 and 1/20 of the average size of the particles of the first group.
  • the particles of the first group are at least 50% and up to 80% by weight of the total of the particles.
  • the bentonite is added to the fluidifier-containing pet-coke in the step of pet-coke grinding, or in the step of mixing with water and additives.
  • the process in case of a continuous-type granulometry of the particles of pet-coke, the process is carried out as described above, with the exception of the fact that the grinding is carried out under wet and not dry conditions.
  • the bentonite can be added either during the wet grinding step in which the coarser fractions are produced, or, preferably, during the wet grinding during which the finer (micronized) fraction is produced.
  • a rod mill In order to obtain the coarser fraction, a rod mill is generally used, whilst to obtain the finer fraction a ball micronizer is used.
  • the end particle sizes of the two pet-coke fractions are those as above mentioned.
  • the wet milling to obtain the coarser fraction is preferably carried out by mixing the raw pet-coke to be ground with the wet-micronized fraction, continuining the grinding, until the size desired for the coarse fraction is reached. This is the grinding process adopted in Examples 2 and 3.
  • a slurry has been prepared with the coarse fraction and the micronized fraction, in the weight ratio of 65/35 at a concentration of pet-coke of 72.0% by weight, and with an amount of DAXAD 15 of 0.5%. Bentonite has been metered into it in the amounts of respectively 0%, 1.0%, 1.5%, 2.0%, 2.5%.
  • the values of stability, as % after 48 hours, for the five cases, are respectively 91.0; 96.0; 98.5; 99; 99.5.
  • the determination of the static stability is carried out by pouring the coal suspension into a 170x24 mm plexiglas cylinder and keeping it resting for a determined time at constant temperature.
  • the cylinder is introduced in a freezer to cause the suspension to solidify.
  • the 150-mm high core is thex extracted from the cylinder and from its ends two samples of about 15 mm of height are drawn.
  • the two samples are then analyzed for the determination of the content of solids.
  • the % ratio of the solids content found in the top sample to that of the bottom sample allows to calculate the stability.
  • the static stability is expressed by a number comprised between 0 and 100.
  • the pet-coke used was that of Example 1.
  • the wet-micronization has been carried out at a concentration of 50% of solids, with an amount of DAXAD 15 corresponding to the concentration of 0.5%, as referred to the end rod milling.
  • the coarse/fine ratio in the end rod milling has been 65/35.
  • the end concentration of pet-coke has been of 71% by weight.
  • the pet-coke used was that of Example 1.
  • the whole amount of fluidifier additive DAXAD 15 has been added in the micronization step, so as to obtain in the end rod milling a concentration of 0.5%.
  • the bentonite amounts above listed correspond to 0%, 0.05%, 0.10%, 0.15%, 0.25%. 0.35%. 0.45% in the end product.
  • the concentration of pet-coke in the end product has resulted around 71 %.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
  • Liquid Carbonaceous Fuels (AREA)
  • Industrial Gases (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Coke Industry (AREA)

Claims (2)

1. Composition comprenant une suspension aqueuse de coke de pétrole et un stabilisant, caractérisé en ce que le stabilisant est de la bentonite présente en proportions comprises dans l'intervalle allant de 0,2% à 3% en poids, rapporté au poids de la suspension, et en ce que les particules de la suspension aqueuse de coke de pétrole ont une taille inférieure à 300 I1m.
2. Procédé de préparation de la composition suivant la revendication 1, caractérisé en ce que la bentonite est ajoutée au coke de pétrole durant le broyage à l'état sec ou à l'état humide de ce dernier.
EP86105103A 1985-04-23 1986-04-14 Stabilisateur pour suspensions aqueuses Expired - Lifetime EP0200074B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT20456/85A IT1187660B (it) 1985-04-23 1985-04-23 Stabilizzante di sospensioni acquose
IT2045685 1985-04-23

Publications (3)

Publication Number Publication Date
EP0200074A2 EP0200074A2 (fr) 1986-11-05
EP0200074A3 EP0200074A3 (en) 1987-11-04
EP0200074B1 true EP0200074B1 (fr) 1990-02-07

Family

ID=11167220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105103A Expired - Lifetime EP0200074B1 (fr) 1985-04-23 1986-04-14 Stabilisateur pour suspensions aqueuses

Country Status (14)

Country Link
EP (1) EP0200074B1 (fr)
JP (1) JPH068420B2 (fr)
AU (1) AU587610B2 (fr)
BR (1) BR8601992A (fr)
DD (1) DD244561A5 (fr)
DE (1) DE3668908D1 (fr)
ES (1) ES8802578A1 (fr)
FI (1) FI861554A (fr)
GR (1) GR860933B (fr)
IN (1) IN167190B (fr)
IT (1) IT1187660B (fr)
NO (1) NO861561L (fr)
SU (1) SU1731065A3 (fr)
ZA (1) ZA862533B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4282922A (en) * 1980-05-16 1981-08-11 E. I. Du Pont De Nemours And Company Lead coated alumina fiber and lead matrix composites thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4062694A (en) * 1975-07-14 1977-12-13 International Telephone And Telegraph Corporation Stable particulate suspensions
US4251230A (en) * 1978-10-26 1981-02-17 International Telephone And Telegraph Corporation Coal suspensions in organic liquids
US4375358A (en) * 1980-09-02 1983-03-01 Conoco Inc. Fuel slurries of solid carbonaceous material in water
US4505716A (en) * 1984-02-15 1985-03-19 Itt Corporation Combustible coal/water mixture for fuels and methods of preparing same

Also Published As

Publication number Publication date
SU1731065A3 (ru) 1992-04-30
DE3668908D1 (de) 1990-03-15
GR860933B (en) 1986-07-01
IT8520456A0 (it) 1985-04-23
AU587610B2 (en) 1989-08-24
FI861554A0 (fi) 1986-04-14
FI861554A (fi) 1986-10-24
EP0200074A2 (fr) 1986-11-05
NO861561L (no) 1986-10-24
EP0200074A3 (en) 1987-11-04
ZA862533B (en) 1986-11-26
DD244561A5 (de) 1987-04-08
IT1187660B (it) 1987-12-23
IN167190B (fr) 1990-09-15
JPH068420B2 (ja) 1994-02-02
JPS61247794A (ja) 1986-11-05
AU5599086A (en) 1986-10-30
ES8802578A1 (es) 1987-07-01
ES554668A0 (es) 1987-07-01
BR8601992A (pt) 1987-01-06

Similar Documents

Publication Publication Date Title
US3989195A (en) Production of aqueous calcium carbonate suspensions
EP0108767B1 (fr) Procede de production d'une boue d'un materiau carbone pulverise
CA1296899C (fr) Methode d'agglomeration de la houille broyee sur une duree controlee
CA1188517A (fr) Bouillie combustible de charbon, d'huile et d'eau, et sa preparation en continu
EP0200074B1 (fr) Stabilisateur pour suspensions aqueuses
US4498906A (en) Coal-water fuel slurries and process for making
US4938983A (en) Stable suspensions of solid particulates in aqueous media
US4118245A (en) Method for producing clay slurries
CA1191684A (fr) Bouillies combustibles d'eau et de charbon, et leur preparation
WO1985001060A1 (fr) Procede de preparation d'une boue carbonee
US4756720A (en) Process for producing a high concentration coal-water slurry
EP0126442B1 (fr) Mélanges aqueux de charbon présentant une distribution spécifique de particules de charbon
KR900005100B1 (ko) 고체연료-물슬러리 혼합물 및 그 제조방법
CA1240966A (fr) Preparation d'un melange a forte concentration de solides
EP0325309B1 (fr) Méthode de préparation d'une suspension aqueuse à haute concentration en solides
KR900004550B1 (ko) 석탄 슬러리 조성물
EP0094786B1 (fr) Boues minérales
EP0165350B1 (fr) Procédé de préparation d'une suspension eau-charbon à haute concentration en charbon
CA1253006A (fr) Procede pour obtenir une suspension charbon-eau fortement concentree
JPS641518B2 (fr)
JPH06108069A (ja) 石炭・水混合物とその製造方法
JPH0794670B2 (ja) 低品位炭素質固形分に基づく石炭水スラリー組成物
EP0244902A2 (fr) Suspension aqueuse de charbons et procédé pour sa préparation
SU653020A1 (ru) Суспензи дл приготовлени литейных формовочных смесей
EP0107346A2 (fr) Compositions combustibles basées sur des charbons, de l'huile et de l'eau, stabilisées avec des surfactants et méthodes pour leur préparation

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB NL SE

PUAB Information related to the publication of an a document modified or deleted

Free format text: ORIGINAL CODE: 0009199EPPU

RA1 Application published (corrected)

Date of ref document: 19861210

Kind code of ref document: A2

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB NL SE

17P Request for examination filed

Effective date: 19880208

17Q First examination report despatched

Effective date: 19881227

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19900207

Ref country code: NL

Effective date: 19900207

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3668908

Country of ref document: DE

Date of ref document: 19900315

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980320

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19980327

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19980424

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990414

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990414

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991231

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000201