US2128782A - Process of manufacaturing noninflammable articles of organic fibrous materials - Google Patents

Process of manufacaturing noninflammable articles of organic fibrous materials Download PDF

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US2128782A
US2128782A US107646A US10764636A US2128782A US 2128782 A US2128782 A US 2128782A US 107646 A US107646 A US 107646A US 10764636 A US10764636 A US 10764636A US 2128782 A US2128782 A US 2128782A
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Prior art keywords
articles
fibrous materials
manufacaturing
noninflammable
organic fibrous
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Expired - Lifetime
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US107646A
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Muller Bernhard
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Ruetgers Germany GmbH
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Ruetgerswerke AG
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00—Fibreboard
    • D21J1/08—Impregnated or coated fibreboard

Definitions

  • My present invention relates to a process of making non-inflammable plates, slabs, or other articles from fibrous materials, for instance from fibers of wood, straw or the like.
  • the fibrous materials from which plates, slabs or other articles are produced in a known manner are soaked in an aqueous solution containing as essential components ammonia, water.- soluble phosphates such as ammonium phosphate and water-soluble silicofluorides, especially magnesium silicofiuoride. From such solutions diflicultly soluble phosphates and silicic acid are. precipitated on the fibers which are worked up to plates, slabs or the like in the usual way.
  • Example-470 kilos of a mass consisting of a mixture of wood pulp and straw pulp are beaten in a hollander of a capacity of about 4 ohm.
  • aqueous pulp 85 kilos of aqueous ammonia of 25% and 24 kilos of monoammonium phosphate 0 (NH.H2PO4) dissolved in 110 kilos of water are added and uniformly distributed.
  • MgSiFs.6HzO magnesium silicofiuoride
  • 150 kilos of water are added in small portions, each portion being uniformly distributed :5 in the aqueous mass.
  • the pulp is beaten in the hollander for about 30 minutes and is then worked up in the usual manner to plates, slabs or the like.
  • ammonium phosphate reacts in the presl0 ence of ammonia with magnesium silicofiuoride according to the following equation:
  • the fibers contain silicic acid beside a water insoluble metal ammonium phosphate.
  • a process according to claim 1 in which monoammonium phosphate is used as the water soluble salt of phosphoric acid and zinc silicofluoride is used as the water soluble metal salt of fluosilicic acid. 5. A process according to claim 1, in which sodium phosphate is used as the water soluble salt of phosphoric acid.

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Description

Patented Aug. 30,1938
PATENT OFFICE PROCESS OF MANUFACTUBIN G NONIN- LE ARTICLES OF ORGANIC Fl- FLALIMAB BROUS MATERIALS Bernhard Miiller, Berlin-Charlottenburg, Germany, assignor to Kutgerswerke-Aktiengesellschait, Berlin, Germany No Drawing. Application October 26, 1936, Se-
rial No. 107,646. In Germany December 14,
'1 Claims. (01. 92-21) My present inventionrelates to a process of making non-inflammable plates, slabs, or other articles from fibrous materials, for instance from fibers of wood, straw or the like. According to my invention the fibrous materials from which plates, slabs or other articles are produced in a known manner, are soaked in an aqueous solution containing as essential components ammonia, water.- soluble phosphates such as ammonium phosphate and water-soluble silicofluorides, especially magnesium silicofiuoride. From such solutions diflicultly soluble phosphates and silicic acid are. precipitated on the fibers which are worked up to plates, slabs or the like in the usual way.
Example-470 kilos of a mass consisting of a mixture of wood pulp and straw pulp are beaten in a hollander of a capacity of about 4 ohm. To the aqueous pulp 85 kilos of aqueous ammonia of 25% and 24 kilos of monoammonium phosphate 0 (NH.H2PO4) dissolved in 110 kilos of water are added and uniformly distributed. Finally- 57 kilos of magnesium silicofiuoride (MgSiFs.6HzO) dissolved in 150 kilos of water are added in small portions, each portion being uniformly distributed :5 in the aqueous mass. The pulp is beaten in the hollander for about 30 minutes and is then worked up in the usual manner to plates, slabs or the like.
The ammonium phosphate reacts in the presl0 ence of ammonia with magnesium silicofiuoride according to the following equation:
fluence of strong heat, but they are non-inflammable and do not burn with a flame. This high resistivity against heat can only be attained if in accordance with my invention the fibers contain silicic acid beside a water insoluble metal ammonium phosphate.
What I claim is:
1. In a process of manufacturing non-inflammable articles of organic fibrous materials the steps of preparing an aqueous pulp of an organic fibrous material, adding to said pulp a solution containing as essential components ammonium hydroxide and a water soluble salt of phosphoric acid, selected from the group consisting of the phosphates of ammonium, sodium or potassium, admixing to the mixture thus obtained an aqueous solution of a water soluble metal salt of fluosilicic acid selected from the group consisting of the fiuosilicates of magnesium, zinc and aluminum to precipitate a water insoluble metal ammonium phosphate and silicic acid on the fibres of said fibrous material, and then forming the treated pulp into non-inflammable articles.
2. A process according to claim 1, in which monoammonium phosphate is used as the water soluble salt of phosphoric acid and magnesium silicofiuoride is used as the water soluble metal salt of fluosilicic acid.
3. A process according to claim 1, in which 1 mol. of monoammonium phosphate, 1 mol. of magnesium silicofiuoride and 6 mols oi ammonium hydroxide are used.
4. A process according to claim 1, in which monoammonium phosphate is used as the water soluble salt of phosphoric acid and zinc silicofluoride is used as the water soluble metal salt of fluosilicic acid. 5. A process according to claim 1, in which sodium phosphate is used as the water soluble salt of phosphoric acid.
6. A process according to claim 1, in which potassium phosphate is used as the water soluble salt of phosphoric acid.
'l. A process according to claim 1, in which aluminum silicofiuoride is used as the water soluble salt of fluosilicic acid.
. BERNHARD Mum-ER.
US107646A 1935-12-14 1936-10-26 Process of manufacaturing noninflammable articles of organic fibrous materials Expired - Lifetime US2128782A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416447A (en) * 1943-07-27 1947-02-25 Du Pont Weather resistant flameproof paper
US2526787A (en) * 1945-01-22 1950-10-24 Du Pont Laminated cellulosic fabrics
US2569575A (en) * 1948-03-05 1951-10-02 Owens Corning Fiberglass Corp Air filter
US2580608A (en) * 1946-04-25 1952-01-01 Ecusta Paper Corp Forming cigarette paper
DE934388C (en) * 1949-03-12 1955-10-20 Erik Oeman Process for the production of porous fiberboard
US2754207A (en) * 1951-08-30 1956-07-10 Ecusta Paper Corp Process of improving paper formation
US3463665A (en) * 1966-04-18 1969-08-26 American Zinc Co Method and composition for rendering material fire resistant
US3788405A (en) * 1971-08-23 1974-01-29 Trans Canada Resources Ltd Process for plugging formations
US7216652B1 (en) * 1999-07-28 2007-05-15 Philip Morris Usa Inc. Smoking article wrapper with improved filler

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416447A (en) * 1943-07-27 1947-02-25 Du Pont Weather resistant flameproof paper
US2526787A (en) * 1945-01-22 1950-10-24 Du Pont Laminated cellulosic fabrics
US2580608A (en) * 1946-04-25 1952-01-01 Ecusta Paper Corp Forming cigarette paper
US2569575A (en) * 1948-03-05 1951-10-02 Owens Corning Fiberglass Corp Air filter
DE934388C (en) * 1949-03-12 1955-10-20 Erik Oeman Process for the production of porous fiberboard
US2754207A (en) * 1951-08-30 1956-07-10 Ecusta Paper Corp Process of improving paper formation
US3463665A (en) * 1966-04-18 1969-08-26 American Zinc Co Method and composition for rendering material fire resistant
US3788405A (en) * 1971-08-23 1974-01-29 Trans Canada Resources Ltd Process for plugging formations
US7216652B1 (en) * 1999-07-28 2007-05-15 Philip Morris Usa Inc. Smoking article wrapper with improved filler

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