FR2405216A1 - Hydrochloric acid mfr. by pyro-hydrolysis of calcium chloride - mixed with molar excess of active silica, allowing economical utilisation of waste materials - Google Patents

Hydrochloric acid mfr. by pyro-hydrolysis of calcium chloride - mixed with molar excess of active silica, allowing economical utilisation of waste materials

Info

Publication number
FR2405216A1
FR2405216A1 FR7828615A FR7828615A FR2405216A1 FR 2405216 A1 FR2405216 A1 FR 2405216A1 FR 7828615 A FR7828615 A FR 7828615A FR 7828615 A FR7828615 A FR 7828615A FR 2405216 A1 FR2405216 A1 FR 2405216A1
Authority
FR
France
Prior art keywords
waste materials
molar excess
pyro
hydrolysis
mixed
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.)
Granted
Application number
FR7828615A
Other languages
French (fr)
Other versions
FR2405216B1 (en
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.)
Alcan Research and Development Ltd
Original Assignee
Alcan Research and Development Ltd
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 Alcan Research and Development Ltd filed Critical Alcan Research and Development Ltd
Publication of FR2405216A1 publication Critical patent/FR2405216A1/en
Application granted granted Critical
Publication of FR2405216B1 publication Critical patent/FR2405216B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/043—Alkaline-earth metal silicates, e.g. wollastonite
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/20—Silicates
    • C01B33/24—Alkaline-earth metal silicates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B7/00—Halogens; Halogen acids
    • C01B7/01—Chlorine; Hydrogen chloride
    • C01B7/03—Preparation from chlorides
    • C01B7/035—Preparation of hydrogen chloride from chlorides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/0481—Other specific industrial waste materials not provided for elsewhere in C04B18/00
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Civil Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Silicon Compounds (AREA)
  • Processing Of Solid Wastes (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

HCl mfr. involves reaction of CaCl2 with a molar excess SiO2, having a surface area of >=15m2/g, at >=600(1000) degrees C in the presence of steam. Pyrohydrolysis of CaCl2 can be effected faster or at a lower temp. than in the presence of ground quartz. The process is useful for the prodn. of HCl from waste materials, without high energy consumption, and also yields alpha-CaSiO3 in very porous form, which is useful for thermal insulation up to its m.pt. (ca. 1500 degrees C). The CaCl2:SiO2 molar ratio is 0.25-0.90. The mixt. pref. is briquetted and reacted in a stream of steam in a fluidised bed reactor.
FR7828615A 1977-10-07 1978-10-06 Hydrochloric acid mfr. by pyro-hydrolysis of calcium chloride - mixed with molar excess of active silica, allowing economical utilisation of waste materials Granted FR2405216A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4191577 1977-10-07

Publications (2)

Publication Number Publication Date
FR2405216A1 true FR2405216A1 (en) 1979-05-04
FR2405216B1 FR2405216B1 (en) 1984-06-29

Family

ID=10421951

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7828615A Granted FR2405216A1 (en) 1977-10-07 1978-10-06 Hydrochloric acid mfr. by pyro-hydrolysis of calcium chloride - mixed with molar excess of active silica, allowing economical utilisation of waste materials

Country Status (5)

Country Link
CA (1) CA1112425A (en)
DE (1) DE2842635C3 (en)
FR (1) FR2405216A1 (en)
NO (1) NO151540C (en)
SE (1) SE427550B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3890406B2 (en) 2002-08-23 2007-03-07 国立大学法人静岡大学 Method for recovering chlorine gas from calcium chloride

Also Published As

Publication number Publication date
FR2405216B1 (en) 1984-06-29
NO151540C (en) 1985-05-02
DE2842635A1 (en) 1979-04-12
NO783396L (en) 1979-04-10
NO151540B (en) 1985-01-14
DE2842635B2 (en) 1980-05-14
SE427550B (en) 1983-04-18
DE2842635C3 (en) 1981-02-05
CA1112425A (en) 1981-11-17
SE7810526L (en) 1979-04-08

Similar Documents

Publication Publication Date Title
HUT57674A (en) Process for hydrothermal production of potassium silicate solutions with high silicon dioxide : potassium monoxide molar ratio
ATE79094T1 (en) GRAPHITE STRUCTURES AND PROCESSES FOR THEIR PRODUCTION.
FR2405216A1 (en) Hydrochloric acid mfr. by pyro-hydrolysis of calcium chloride - mixed with molar excess of active silica, allowing economical utilisation of waste materials
JPS62143813A (en) Production of silicon tetrachloride
ES2152408T3 (en) PROCEDURE TO PRODUCE DIFLUOROMETHANE.
GB1322843A (en) Generation of silicon tetrafluoride
FR2417470A1 (en) Anhydrous sodium perborate prepn. - by dehydration of hydrated sodium perborate in presence of hot, decarbonated, dry air
ES363106A1 (en) Method of Recovering Fluorine from Carbonaceous Waste Material
GB2005240A (en) Production of hydrochloric acid
JPS57135711A (en) Preparation of high purity silicon tetrafluoride
KR910700202A (en) Thermo-Aqueous Preparation of Sodium Silicate Solution
ES8506240A1 (en) Method for preparing elemental sulfur as a diffusion-resistant gas and methods for its use in making lime, sulfur dioxide and sulfuric acid from waste gypsum
GB1236660A (en) Preparation of silicon carbide
JPS542298A (en) Production of lime nitrogen
JPS5510465A (en) Production of fibrous calcium potassium silicate
JPS52141500A (en) Production of calcium silicate hydrate crystal
JPS53100984A (en) Production of exhaust gas treatment catalyst
JPS5352299A (en) Easily soluble solid alkali silicate and production thereof
JPS54160600A (en) Production of silicon nitride
JPS52105596A (en) Production of hydrochloric acid
JPS5585419A (en) Production of calcium sodium silicate
JPS5373499A (en) Production of calcium silicate fiber
JPS5542249A (en) Production of calcium potassium silicate
ATE52258T1 (en) PROCESS FOR THE PREPARATION OF 2-BETA-DRIBOFURANOSYLSELENAZOLE-4-CARBOXAMIDE.
JPS5673031A (en) Preparation of tetrafluoromethane

Legal Events

Date Code Title Description
ST Notification of lapse