DE832565C - Dry mix for the production of magnesia cements - Google Patents

Dry mix for the production of magnesia cements

Info

Publication number
DE832565C
DE832565C DEK3934A DEK0003934A DE832565C DE 832565 C DE832565 C DE 832565C DE K3934 A DEK3934 A DE K3934A DE K0003934 A DEK0003934 A DE K0003934A DE 832565 C DE832565 C DE 832565C
Authority
DE
Germany
Prior art keywords
magnesium
production
dry mix
cements
magnesium chloride
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
Application number
DEK3934A
Other languages
German (de)
Inventor
Dr Paul Hoefer
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.)
Kali Forschungs Anstalt GmbH
Original Assignee
Kali Forschungs Anstalt GmbH
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 Kali Forschungs Anstalt GmbH filed Critical Kali Forschungs Anstalt GmbH
Priority to DEK3934A priority Critical patent/DE832565C/en
Application granted granted Critical
Publication of DE832565C publication Critical patent/DE832565C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B9/00Magnesium cements or similar cements
    • C04B9/02Magnesium cements containing chlorides, e.g. Sorel cement

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Description

Trockene Mischung für die Herstellung von Magnesiazementen Für die Herstellung von Magnesiazementen (Sorelzementen) für die verschiedensten Verwendungszwecke geht man allgemein von einem gebrannten kaustischen Magnesiumoxyd und von einer Magnesiumchloridlauge aus, die man unmittelbar vor der Verwendung an Ort und, Stelle mischt. Die Güte der erhaltenen Produkte hängt wesentlich von der sorgfältigen Innehaltung des Mengenverhältnisses und der Konzentration der Lauge sowie auch von der Sorgfalt ab, mit der diese Bestandteile, gegebenenfalls mit den Füllstoffen, innig vermischt werden. Es würde für die Magnesiazementherstellung und -verwendung eine wesentliche Erleichterung bedeuten, wenn man fertige trockene Mischungen der Hauptbestandteile zur Verfügung hätte. Das Magnesiumoxyd läßt sich jedoch nur mit weitgehend entwässertem Magnesiumchlorid in trockener Form aufbewahren, ohne daß beim Lagern ein wesentliches Abbinden der Bestandteile eintritt. Entwässertem Magnesiumoxychlorid selbst fehlt zunächst die Fähigkeit des Abbindens.Dry mix for the manufacture of magnesia cements For the Production of magnesia cements (Sorel cements) for a wide variety of uses one generally goes from a burnt caustic magnesia and from one Magnesium chloride solution, which you put on the spot immediately before use mixes. The quality of the products obtained depends largely on careful pause the proportions and the concentration of the lye as well as the care with which these components, optionally with the fillers, are intimately mixed will. It would become an essential one for magnesia cement manufacture and use Relief mean when you have ready-made dry mixes of the main ingredients would have available. The magnesium oxide can, however, only be obtained with largely dehydrated Store magnesium chloride in dry form with no essential during storage Setting of the components occurs. There is no dehydrated magnesium oxychloride itself first of all the ability to set.

Es ist nun gefunden worden, daß Mischungen von Magnesiumhydroxyd mit Magnesiumchlorid bald nach ihrer Herstellung sich ohne besondere Schwierigkeiten so weit entwässern lassen, daß neben gebildetem Oxychlorid vorwiegend Magnesiumhydroxyd und Magnesiumchlorid in freier Form in der Mischung erhalten bleiben. Diese Mischungen können dann mit Wasser oder je nach der gewünschten Zusammensetzung und dem Verwendungszweck des herzustellenden Zements auch mit Magnesiumoxyd oder Magnesiumchloridlösung oder beiden zugleich zu den erforderlichen Massen angerührt werden.It has now been found that mixtures of magnesium hydroxide with Magnesium chloride soon after its production turned out to be without any particular difficulty Let it drain so far that, in addition to the oxychloride formed, mainly magnesium hydroxide and magnesium chloride are retained in the mixture in free form. These mixes can then with water or depending on the desired composition and intended use of the cement to be produced also with magnesium oxide or magnesium chloride solution or both at the same time to be mixed to the required masses.

Es wurde dabei gefunden, daß überraschenderweise der Trocknungsprozeß der Massen schon bei Temperaturen von etwa i5o° sehr viel leichter vor sich geht wie das Trocknen einer gleichwertigen Menge von hochkonzentrierter Magnesiumchloridlösung, bis zu dem Entwässerungsgrad, der in den erfindungsgemäß hergestellten Massen vorliegt, so daß man leicht zu einem Magnesiumchlorid'hydrat bis unter Mg C12 # ,4 H20 kommt.It was found that, surprisingly, the drying process of the masses is much easier even at temperatures of about i5o ° than the drying of an equivalent amount of highly concentrated magnesium chloride solution, up to the degree of dehydration that is present in the masses produced according to the invention, so that one easily to a magnesium chloride hydrate up to Mg C12 #, 4 H20 .

Technisch kann man zu den erforderlichen Ausgangsmischungen von Magnesiumhydroxyd und Magnesiumchlorid auf verschiedenen Wegen gelangen, z. B.Technically, one can go to the required starting mixtures of magnesium hydroxide and magnesium chloride arrive in various ways, e.g. B.

i. Fällen von Magnesiumchloridlösungen mit kaustisch gebranntem Kalk nach Patent 687 785, Verdrängen des Calciumchlorids mit Magnesiumchloridlösungen und Trocknen des Produktes; 2. den nach i. erhaltenen Preßkuchen trägt man in konzentriertere Mg C1.-Lauge ein, läßt kurze Zeit abbinden, zerkleinert in noch knetbarer Beschaffenheit die erhaltene Masse und trocknet; 3. dig nach i vorgenommene Fällung wird statt mit Kalk mit kaustisch gebranntem Dolomit durchgeführt, im übrigen wird nach i. bzw. 2. vorgegangen. Diese Massen enthalten auch aus dem Dolomit bzw. den dolomitischen Kalken stammendes noch unverändertes Magnesiumoxyd.i. Precipitation of magnesium chloride solutions with caustic burnt lime according to patent 687 785, displacement of calcium chloride with magnesium chloride solutions and drying the product; 2. the after i. obtained press cake is carried in more concentrated Mg C1.-lye, allows to set for a short time, crushed to a still kneadable consistency the obtained mass and dry; 3. Precipitation carried out dig after i will take place carried out with lime with caustic burned dolomite, otherwise according to i. or 2. proceeded. These masses also contain from the dolomite or the dolomitic Magnesium oxide still unchanged from limescale.

Es ist schon vorgeschlagen worden, zur Vermeidung der Entmischung während des Erhärtens von Sorelzement der Chlormagnesiumlösung schleimige oder gallertbildende Körper zuzusetzen oder Magnesiumhydroxyd enthaltendes Chlormagnesium zu verwenden, das mit gebranntem Dolomit zu der üblichen Zementmischung verarbeitet wird. Abgesehen davon, daß bei diesem bekannten Verfahren der : Anteil des Magnesiumhydroxyds in der Mischung nur gering ist und nur den Zweck hat, eine Entmischung während des Verhärtens zu verhindern, ist eine Herstellung haltbarer trockner Mischungen gemäß dem neuen Verfahren aus Magnesiumhydroxyd und Chlormagnesium nicht vorgesehen.It has already been suggested to avoid segregation During the hardening of Sorel cement, the magnesium chloride solution becomes slimy or gelatinous Adding body or using magnesium hydroxide containing magnesium, which is processed with burnt dolomite into the usual cement mixture. Apart from that from the fact that in this known process: the proportion of magnesium hydroxide in the mixture is only slight and only has the purpose of segregation during the Preventing hardening is a preparation of durable dry mixes according to The new process from magnesium hydroxide and chlorine magnesium is not intended.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung N-on Magnesiazementen (Sorelzementen) aus Gemischen von Magnesiumhydroxyd und Magnesiuinchloridlösungen, dadurch gekennzeichnet, daß wäßrige Gemische ausagnesiumhydrox@-d und N-lagnesiumchloridlösungeii getroclciiet, zerkleinert und zum Gebrauch gegebenenfalls nach Zusatz von Füllstoffen mit Wasser angerührt werden. PATENT CLAIM: Process for the production of N-one magnesia cements (Sorel cements ) from mixtures of magnesium hydroxide and magnesium chloride solutions, characterized in that aqueous mixtures of magnesium hydroxide and N-lagnesium chloride solution are dried, crushed and mixed with water for use, if necessary after adding fillers.
DEK3934A 1942-03-24 1942-03-24 Dry mix for the production of magnesia cements Expired DE832565C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK3934A DE832565C (en) 1942-03-24 1942-03-24 Dry mix for the production of magnesia cements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK3934A DE832565C (en) 1942-03-24 1942-03-24 Dry mix for the production of magnesia cements

Publications (1)

Publication Number Publication Date
DE832565C true DE832565C (en) 1952-02-25

Family

ID=7210086

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK3934A Expired DE832565C (en) 1942-03-24 1942-03-24 Dry mix for the production of magnesia cements

Country Status (1)

Country Link
DE (1) DE832565C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2457264A1 (en) * 1979-05-25 1980-12-19 Kali & Salz Ag PROCESS FOR THE PREPARATION OF A MAGNESIAN MORTAR AND MORTAR OBTAINED
FR2622570A1 (en) * 1987-11-02 1989-05-05 Scient Tech Batimen Centre MAGNESIAN CEMENTS COMPRISING A PARTIALLY HYDRATED MAGNESIUM SALT, AND A VERY REACTIVE MAGNESIA, MAGNETIC BINDERS WITH ACCELERATED AND IMPROVED WATER TENSION OBTAINED FROM SUCH CEMENTS, AND MATERIAL OBTAINED WITH SUCH A MAGNESIAN, NON-EXPANDED OR EXPANDED BINDER
BE1002728A5 (en) * 1989-01-05 1991-05-21 Ct Scient Tech Batiment Cstb Magnesian cements comprising a partially dehydrated magnesium salt and ahighly reactive magnesia, accelerated setting and enhanced water resistancemagnesian binders obtained from such cements and substance obtained withsuch a magnesian binder, non-expanded or expanded.
GR890100077A (en) * 1989-02-07 1991-06-28 Centre Scient Tech Batiment Magnesium cements comprising a partially deshydrated magnesium salt and a very reactive magnesia magnesium binders with accelerated getting and improved water resistance obtained from such cements and non expanded or expanded material obtained with such.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2457264A1 (en) * 1979-05-25 1980-12-19 Kali & Salz Ag PROCESS FOR THE PREPARATION OF A MAGNESIAN MORTAR AND MORTAR OBTAINED
FR2622570A1 (en) * 1987-11-02 1989-05-05 Scient Tech Batimen Centre MAGNESIAN CEMENTS COMPRISING A PARTIALLY HYDRATED MAGNESIUM SALT, AND A VERY REACTIVE MAGNESIA, MAGNETIC BINDERS WITH ACCELERATED AND IMPROVED WATER TENSION OBTAINED FROM SUCH CEMENTS, AND MATERIAL OBTAINED WITH SUCH A MAGNESIAN, NON-EXPANDED OR EXPANDED BINDER
EP0378010A1 (en) * 1987-11-02 1990-07-18 Centre Scientifique Et Technique Du Batiment Magnesium cements and binders with accelerated setting and with enhanced water requirement obtained from such cements, and a material obtained from such a binder
BE1002728A5 (en) * 1989-01-05 1991-05-21 Ct Scient Tech Batiment Cstb Magnesian cements comprising a partially dehydrated magnesium salt and ahighly reactive magnesia, accelerated setting and enhanced water resistancemagnesian binders obtained from such cements and substance obtained withsuch a magnesian binder, non-expanded or expanded.
GR890100077A (en) * 1989-02-07 1991-06-28 Centre Scient Tech Batiment Magnesium cements comprising a partially deshydrated magnesium salt and a very reactive magnesia magnesium binders with accelerated getting and improved water resistance obtained from such cements and non expanded or expanded material obtained with such.

Similar Documents

Publication Publication Date Title
DE832565C (en) Dry mix for the production of magnesia cements
DE454744C (en) Process for the production of porous artificial stones
DE2064210A1 (en) Method of making dead-burned plaster of paris
DE941190C (en) Process for the production of desizing agents based on bacterial and pancreatic amylase
DE432542C (en) Process for the production of a cement-like mass
CH98789A (en) Process for the preparation of sulphurous acid and hydraulic binders from gypsum.
AT54657B (en) Process for the production of dry magnesia cement or waterproof stone wood and artificial stone masses.
DE958199C (en) Process for the production of lumpy magnesia lime
DE833474C (en) Production of a hydraulic binder
AT162167B (en) Process for the manufacture of products containing magnesia cement.
DE654369C (en) Process for the production of porous, refractory moldings
DE868272C (en) Process for the production of magnesia cements
DE848622C (en) Process for the production of plaster of paris with pores
AT93185B (en) Process for preserving calcium hypochlorite.
DE362222C (en) Process to make dolomite and magnesite useful for the production of stone wood
DE809897C (en) Process for the production of a manganese dioxide catalyst suitable for water purification purposes
DE654433C (en) Process for the production of light, porous moldings from cellulose-containing materials and cement
DE621340C (en) Process for the production of hydrosilicate-bound molded articles
DE752357C (en) Process for the production of magnesia cements
DE609858C (en) Process for the production of porous, vesicular masses and objects
DE900311C (en) Compounds based on Sorel cement and process for the production of the starting magnesia
DE151252C (en)
SU385939A1 (en) CONCRETE MIXTURE
DE105523C (en)
DE500138C (en) Process for the production of dolomite cements