EP1317514A1 - Procede de fabrication d'un germe d'oxyde de fer contenant de l'aluminium - Google Patents

Procede de fabrication d'un germe d'oxyde de fer contenant de l'aluminium

Info

Publication number
EP1317514A1
EP1317514A1 EP01976151A EP01976151A EP1317514A1 EP 1317514 A1 EP1317514 A1 EP 1317514A1 EP 01976151 A EP01976151 A EP 01976151A EP 01976151 A EP01976151 A EP 01976151A EP 1317514 A1 EP1317514 A1 EP 1317514A1
Authority
EP
European Patent Office
Prior art keywords
feooh
mol
iron oxide
production
total
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.)
Withdrawn
Application number
EP01976151A
Other languages
German (de)
English (en)
Inventor
Ulrich Meisen
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.)
Lanxess Deutschland GmbH
Original Assignee
Bayer AG
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
Priority claimed from DE2000144095 external-priority patent/DE10044095A1/de
Priority claimed from DE2000150683 external-priority patent/DE10050683A1/de
Application filed by Bayer AG filed Critical Bayer AG
Publication of EP1317514A1 publication Critical patent/EP1317514A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/0018—Mixed oxides or hydroxides
    • C01G49/0045—Mixed oxides or hydroxides containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/02—Oxides; Hydroxides
    • C01G49/06—Ferric oxide (Fe2O3)
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/22—Compounds of iron
    • C09C1/24—Oxides of iron
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/60—Compounds characterised by their crystallite size
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
    • C01P2006/62—L* (lightness axis)
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
    • C01P2006/63—Optical properties, e.g. expressed in CIELAB-values a* (red-green axis)
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
    • C01P2006/64—Optical properties, e.g. expressed in CIELAB-values b* (yellow-blue axis)

Definitions

  • the present invention relates to a method for producing an aluminum-containing iron oxide nucleus with an ⁇ -FeOOH crystal structure from FeCl 2 . This germ is used as the starting material for the production of iron oxide red ( ⁇ -Fe 2 O 3 ) via ⁇ -FeOOH
  • Synthetic iron oxides are usually produced by the Laux process, the Peniman process, the precipitation process, the neutralization process or the roasting process (Ullmann's Encyclopedia of Industrial Chemistry, 5th. Ed.,
  • the iron oxides thus obtained are generally used as pigments.
  • the acidic process uses an iron component, i.e. a component dissolved in water
  • Iron salt, and an alkaline component is metered into this with intensive mixing.
  • the amount of alkaline component added is generally between 15% and 70% of the stoichiometrically required amount.
  • the pH is after adding the alkaline
  • an oxidizing agent usually atmospheric oxygen, is used for the oxidation.
  • the reaction is carried out at temperatures between 20 ° C and 50 ° C. At significantly higher temperatures there is a risk of the formation of undesirable magnetites.
  • the end point of the reaction can be recognized by a sharp drop in the pH value and the redox potential.
  • germ the properties of the product obtained (generally called germ) are determined and, if suitable, this is further processed directly to give the ⁇ -FeOOH pigment.
  • the alkaline process differs from the acid process in the amount of the alkaline component added. In the alkaline process, this is at least 120% of the stoichiometrically required amount, but is generally significantly higher.
  • the temperatures at which this reaction is carried out can be somewhat higher than the temperatures used in the acidic process, since the risk of magnetite formation is lower here.
  • the alkaline process gives relatively long-needle ⁇ -FeOOH crystallites with a length to width ratio of 10: 1 to 30: 1. Since these crystals are also very low in dendrites, this process is particularly suitable for the production of ⁇ -FeOOH as a starting product for magnetic tapes.
  • an ⁇ -FeOOH seed is preferably used and this is then coarsened (built up) in acid, which reduces the incorporation of the coloring metals.
  • the ⁇ -FeOOH serving as the starting material must contain only a small proportion of coloring metals.
  • the build-up may only be carried out at pH values of less than approx. 4, since at higher pH values the coloring metals are increasingly incorporated become.
  • the particle shape of the ⁇ -FeOOH has a significant influence on the color properties, the viscosity of the lacquer and the binder requirement.
  • short-needle ⁇ -FeOOH particles are required. These can be produced from long-needle ⁇ -FeOOH particles by intensive grinding. A cheaper alternative is the direct production of short-lived ⁇ -FeOOH particles.
  • the object of the present invention was to provide a method for the simple and inexpensive production of a short-needle ⁇ -FeOOH seed by the precipitation method.
  • this ⁇ -FeOOH seed is built up to an ⁇ -FeOOH pigment.
  • an ⁇ -Fe 2 O 3 red pigment is ultimately produced by annealing.
  • this mixture is heated to a precipitation temperature between 30 ° C and 60 ° C, preferably 35 ° and 50 ° C,
  • the precipitated suspension is then oxidized with an oxidizing agent at such a rate that the oxidation rate is 2-50 mol% / h of the iron to be oxidized and
  • the Al-containing ⁇ -FeOOH nucleus obtained after the oxidation is optionally isolated.
  • the Al-containing ⁇ -FeOOH seed obtained after the oxidation can optionally be used without further isolation, after testing the properties, for the production of iron oxide pigments via ⁇ -FeOOH as an intermediate stage.
  • the preferred procedure is as follows:
  • Oxidation rate 30 - 35 mol% Fe-H / h
  • A1C1 3 (as an aqueous solution) is preferably used as Al component.
  • Si or Ti as a seed modifier, in the form of their chlorides, is also possible, but requires a higher technical outlay in production.
  • NaOH, KOH, Na 2 CO 3 , K 2 CO 3 , Mg (OH) 2 , MgO, MgCO 3 , Ca (OH) 2 , CaO, CaCO 3 , NH 3 or secondary or tertiary aliphatic amines in aqueous Solution or aqueous slurry can be used.
  • NaOH is preferably used.
  • Atmospheric oxygen oxygen, ozone, H 2 O 2 , chlorine, nitrates of the alkali or alkaline earth metals or NH 4 NO 3 are used as the oxidizing agent. Atmospheric oxygen is preferably used.
  • iron-chloride solution used contains larger quantities at pH values of less than 4 precipitable coloring metals, these can be added by adding a alkaline component to the iron-chloride solution up to pH 4 can be precipitated.
  • the resulting solid can be separated from the supernatant clear, purified solution by sedimentation, filtration or centrifugation.
  • Fe-DI is also removed, which has a significantly undesirable effect on the reaction to the ⁇ -FeOOH germ (formation of black
  • the reaction is carried out in discontinuous or continuous stirred tanks, in stirred tank cascades, loop reactors or stirrerless reactors with two-component nozzles as mixing elements.
  • the ⁇ -FeOOH nuclei according to the invention After the ⁇ -FeOOH nuclei according to the invention have been produced, they are converted into a pigment, which takes place by coarsening of the nuclei particles known per se (pigment build-up). However, since the ⁇ -FeOOH nuclei according to the invention are not used as such, it is necessary to describe the pigment structure and the annealing to an iron oxide red pigment.
  • the Al-containing germ produced by the process according to the invention is pumped to a solution of FeCl or FeSO 4 or another Fe-D salt. 7 - 15 mol Fe-ü salt as a solution with a
  • Red pigment should be produced, it makes sense to feed the washed solid directly to a suitable glow unit.
  • the ⁇ -FeOOH pigment is expediently annealed in a continuously operating apparatus. Continuous rotary kilns are suitable for this
  • the required annealing temperatures are only between 550 ° C and 800 ° C.
  • the required average residence times are between 10 and 80 minutes.
  • the resulting ⁇ -Fe 2 O 3 pigment is then preferably subjected to screening grinding in order to remove oversize particles and agglomerates.
  • the red pigment thus obtained is characterized by high color purity, almost isometric particle shape, low oil number and high chemical purity.
  • the sum of its properties makes it particularly suitable for:
  • This process is particularly economical due to the relatively low annealing temperatures, the inexpensive raw materials and the high production rate in the production of yellow pigments. Due to the special reaction procedure and the use of a precisely specified germ, it is possible to safely produce particularly high-quality red pigments, which have application advantages compared to pigments produced by other processes. Environmentally relevant chemicals are not used in the production of the red pigments according to the invention.
  • the BET surface area is determined using the so-called 1-point method according to DTN 66131.
  • the crystallite size is determined on the Phillips powder diffractometer.
  • the 110 reflex is used to determine the crystallite size.
  • the determination in goethite is carried out after X-ray diffractometric irradiation by means of reflection detection.
  • the evaluation is carried out using silicon as an external standard.
  • Example 1 Aluminum-containing germ from FeCl 2 and A1CI 3
  • the FeCl 2 amount corresponded to 13.9 mol Fe (Fe-Ü and Fe-Iü), the AlCl 3 amount 1.71 mol, the HCl amount 0.989 mol.
  • the ratio Al / Fe total accordingly corresponded to 12.3 mol% based on total Fe.
  • This solution was heated to 34 ° C. with stirring and gassing with 300 Nl / h nitrogen. After this temperature had been reached, 1615 ml of sodium hydroxide solution containing 300 g of NaOH / 1 (corresponding to 7.5 equivalents per liter) were pumped in in 6 minutes using a gear pump. According to this, 33.8% of the metals Fe + AI were precipitated. Immediately after the precipitation had ended, the gassing was stopped with nitrogen and 97 Nl / h of air were gassed for the purpose of oxidation. 180 minutes after
  • the germ obtained had the following properties:
  • the FeCl 2 amount corresponded to 9.5 mol Fe (Fe-D and Fe-Iü), the AlCl 3 amount 1.82 mol, the HCl amount 0.36 mol.
  • the Al / Fe total ratio accordingly corresponded to 19.2 mol% based on total Fe.
  • This solution was heated to 44 ° C. with stirring and gassing with 300 Nl / h nitrogen. After this temperature had been reached, 1061 ml of sodium hydroxide solution containing 300 g of NaOH / 1 (corresponding to 7.5 equivalents per liter) were pumped in in 10 minutes using a gear pump. Accordingly, 32.1% of the metals Fe + AI were precipitated by the NaOH.
  • the germ had the following properties:
  • the FeCl 2 amount corresponded to 13.9 mol Fe (Fe-D and Fe-DI), the AlCl 3 amount 1.71 mol, the HCl amount 0.989 mol.
  • the total Al / Fe ratio accordingly corresponded
  • the germ had the following properties:
  • the yellow pigment obtained had the following properties:
  • All annealing was carried out in a laboratory chamber furnace at the specified temperatures.
  • the amount of product was 50 g, the bed height 40 mm, the annealing time 30 minutes at the specified temperature.

Abstract

La présente invention concerne un procédé de fabrication d'un germe d'oxyde de fer contenant de l'aluminium, présentant une structure cristalline α-FeOOH constituée de FeCl2. Ledit germe sert de matériau de base pour la fabrication d'oxyde de fer rouge (α-Fe2O3) avec α-FeOOH en tant qu'étape intermédiaire.
EP01976151A 2000-09-07 2001-08-27 Procede de fabrication d'un germe d'oxyde de fer contenant de l'aluminium Withdrawn EP1317514A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE2000144095 DE10044095A1 (de) 2000-09-07 2000-09-07 Verfahren zur Herstellung eines aluminiumhaltigen Eisenoxidkeims
DE10044095 2000-09-07
DE10050683 2000-10-13
DE2000150683 DE10050683A1 (de) 2000-10-13 2000-10-13 Verfahren zur Herstellung eines aluminiumhaltigen Eisenoxidkeims
PCT/EP2001/009836 WO2002020674A1 (fr) 2000-09-07 2001-08-27 Procede de fabrication d'un germe d'oxyde de fer contenant de l'aluminium

Publications (1)

Publication Number Publication Date
EP1317514A1 true EP1317514A1 (fr) 2003-06-11

Family

ID=26006953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01976151A Withdrawn EP1317514A1 (fr) 2000-09-07 2001-08-27 Procede de fabrication d'un germe d'oxyde de fer contenant de l'aluminium

Country Status (5)

Country Link
US (1) US6508877B2 (fr)
EP (1) EP1317514A1 (fr)
AU (1) AU2001295513A1 (fr)
CA (1) CA2421245A1 (fr)
WO (1) WO2002020674A1 (fr)

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US7399454B2 (en) 2004-04-29 2008-07-15 Metalox International, Llc Metallurgical dust reclamation process
DE102004024013A1 (de) * 2004-05-14 2005-12-01 Bayer Chemicals Ag Farbreine, gut dispergierbare Eisenoxidrotpigmente mit hoher Mahlstabilität
US7124777B2 (en) * 2004-09-03 2006-10-24 Ranco Incorporated Of Delaware Reversing valve with flowsplitter
CN1318518C (zh) * 2005-05-27 2007-05-30 华南理工大学 硫酸晶种混酸法氧化铁红制备方法
US7535426B2 (en) * 2005-06-20 2009-05-19 Visteon Global Technologies, Inc. Integrated antenna in display or lightbox
JP5596539B2 (ja) 2007-05-21 2014-09-24 オーバイト アルミナ インコーポレイテッド アルミニウム鉱石からアルミニウム及び鉄を抽出する方法
EP2686458A4 (fr) 2011-03-18 2015-04-15 Orbite Aluminae Inc Procédés permettant de récupérer des éléments de terres rares à partir de matériaux renfermant de l'aluminium
EP2705169A4 (fr) 2011-05-04 2015-04-15 Orbite Aluminae Inc Procédés d'extraction d'éléments de terres rares dans divers minerais
WO2012162817A1 (fr) 2011-06-03 2012-12-06 Orbite Aluminae Inc. Procédés d'obtention d'hématite
RU2014114938A (ru) 2011-09-16 2015-10-27 Орбит Элюминэ Инк. Способы получения оксида алюминия и разнообразных других продуктов
CN104302791B (zh) 2012-01-10 2017-03-15 奥佰特氧化铝有限公司 用于处理赤泥的方法
RU2633579C9 (ru) 2012-03-29 2017-12-25 Орбит Алюминэ Инк. Способы обработки летучей золы
WO2014008586A1 (fr) 2012-07-12 2014-01-16 Orbite Aluminae Inc. Procédés pour la préparation d'oxyde de titane et de divers autres produits
WO2014047728A1 (fr) 2012-09-26 2014-04-03 Orbite Aluminae Inc. Procédés pour la préparation d'alumine et de chlorure de magnésium par lixiviation par hcl de divers matériaux
CN105189357A (zh) 2012-11-14 2015-12-23 奥佰特氧化铝有限公司 纯化铝离子的方法
CN112875762B (zh) * 2021-01-30 2022-05-17 河北粤海水务集团有限公司 利用含铁酸洗废液制备氧化铁红的方法

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DE3326632A1 (de) 1983-07-23 1985-02-07 Bayer Ag, 5090 Leverkusen Neue eisenoxidgelbpigmente mit niedrigem silking-effekt sowie deren herstellung
US4618375A (en) * 1984-10-04 1986-10-21 Basf Corporation Transparent iron oxide pigments
WO1997034830A1 (fr) * 1996-03-21 1997-09-25 Dowa Mining Co., Ltd. Poudre pour sous-couche de support d'enregistrement magnetique de type a revetement
DE19652953C2 (de) * 1996-12-19 2000-05-18 Bayer Ag Verfahren zur Herstellung von Eisenoxidkeimen und deren Verwendung
DE19746263A1 (de) * 1997-10-20 1999-04-22 Bayer Ag Eisenoxidgelbpigmente, Verfahren zur Herstellung von Eisenoxidgelbpigmenten und deren Verwendung
DE19746262A1 (de) * 1997-10-20 1999-04-22 Bayer Ag Eisenoxidrotpigmente, Verfahren zur Herstellung von Eisenoxidrotpigmenten und deren Verwendung
DE19751141A1 (de) * 1997-11-19 1999-05-20 Bayer Ag Nicht-silkende Eisenoxidgelb-Pigmente mit hoher Buntheit
US6139618A (en) * 1998-08-28 2000-10-31 Toda Kogyo Corporation Fine yellow composite iron oxide hydroxide pigment, and paint or resin composition using the same

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Also Published As

Publication number Publication date
AU2001295513A1 (en) 2002-03-22
US6508877B2 (en) 2003-01-21
WO2002020674A1 (fr) 2002-03-14
US20020050230A1 (en) 2002-05-02
CA2421245A1 (fr) 2003-03-04

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