US1588335A - Process of making pulp from hulls - Google Patents

Process of making pulp from hulls Download PDF

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Publication number
US1588335A
US1588335A US358024A US35802420A US1588335A US 1588335 A US1588335 A US 1588335A US 358024 A US358024 A US 358024A US 35802420 A US35802420 A US 35802420A US 1588335 A US1588335 A US 1588335A
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Prior art keywords
hulls
pulp
making pulp
solution
vessel
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US358024A
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Puttaert Jean Francois
Puttaert Henry Francis Joseph
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials

Definitions

  • This invention relates to the process of ex.- tracting pulp from the hulls of These hulls are a waste product and since they have a high silicate content cannot burn and so are very diflicult to dispose of.
  • the silicate in the hulls may be removed by either one of two methods; namely, the acid or the base process, both of which are well known in the wood pulp industry. We 1 prefer the base process because it is less expensive.
  • the re-agent in this case is approximate a solution bv wei ht of caustic soda.
  • the hulls are placed m a closed or adjustable vessel and covered with water.
  • (2) .To this is added the caustic soda solution, about by weight of the quantity of hulls in the vessel. pressure of 50 to 100 pounds per square inch, 20 for six or eight hours, the pressure being higher when the time of boiling is short.
  • the sodium silicate has settled to the bottom, leaving the fibrous pulp on top.
  • the pulp is withdrawn and thoroughly washed. (6) It is then run through a defibercat-ing' machine, such as the balsam stone beater.
  • the process of extractingfibrous pulp from hulls of rice by placing the hulls in a closed vessel, placing water in the vessel so that it covers the hulls, placing about 5% solution of caustic soda in the vessel, approximately25% by weight of the quantity of the hulls, boiling the mass under pressure of twenty to eighty pounds per square inch for six or eight hours "thus extracting and settling the silicates, removing the fibrous pulp, washing thepulp, and then defibercating the pulp.

Description

Patented June 8, 1926.
UNITED STATES PATENT OFFICE.
JEAN FRANCOIS PUTTAEB'I AND HENRY FRANCIS. JOSEPH PUTTAERT, OF SAN i FRANCISCO, CALIFORNIA.
PROCESS OI MAKING PULP FROM BULLS.
Io Drawing.
This invention relates to the process of ex.- tracting pulp from the hulls of These hulls are a waste product and since they have a high silicate content cannot burn and so are very diflicult to dispose of.
The silicate in the hulls may be removed by either one of two methods; namely, the acid or the base process, both of which are well known in the wood pulp industry. We 1 prefer the base process because it is less expensive.
The re-agent in this case is approximate a solution bv wei ht of caustic soda. (1) The hulls are placed m a closed or adjustable vessel and covered with water. (2) .To this is added the caustic soda solution, about by weight of the quantity of hulls in the vessel. pressure of 50 to 100 pounds per square inch, 20 for six or eight hours, the pressure being higher when the time of boiling is short. At the end of this time the sodium silicate has settled to the bottom, leaving the fibrous pulp on top. (4) The pulp is withdrawn and thoroughly washed. (6) It is then run through a defibercat-ing' machine, such as the balsam stone beater.
A clean fibrous pulp is obtained which by subsequent proper manipulation may be (3) This mass is boiled undera Application filed February 12, 1920. Serial No. 358,024.
transformed into paper, paper board or other products. Approximately of the hulls is available for pulp, the other 50% being silica and other foreign matter.
What we claim is 1. The process of extractingfibrous pulp from hulls of rice by placing the hulls in a closed vessel, placing water in the vessel so that it covers the hulls, placing about 5% solution of caustic soda in the vessel, approximately25% by weight of the quantity of the hulls, boiling the mass under pressure of twenty to eighty pounds per square inch for six or eight hours "thus extracting and settling the silicates, removing the fibrous pulp, washing thepulp, and then defibercating the pulp.
2. The process of making paper pulp from rice hulls, which comprises cooking the hulls in a weak sodium hydroxide solution to release the silica in the hulls and cause it to react with the solution to form practically pure sodium silicate solution, removing the sodium silicate solution from the mass and beating the mass toa pulp.
I'ntestimony whereof we aflix our signa- 5 tures.
. JEAN FRANCOIS PUTTAERT.
HENRY FRANCIS JOSEPH PUTTAERT.
US358024A 1920-02-12 1920-02-12 Process of making pulp from hulls Expired - Lifetime US1588335A (en)

Priority Applications (1)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259501A (en) * 1964-06-11 1966-07-05 Delta Ind Inc Rice hull products and method
EP0283589A1 (en) * 1987-01-27 1988-09-28 Opta Food Ingredients, Inc. Dietary fiber and method of making
US4957599A (en) * 1988-04-15 1990-09-18 E. I. Du Pont De Nemours And Company Alkaline extraction, peroxide bleaching of nonwoody lignocellulosic substrates
US5023103A (en) * 1987-01-27 1991-06-11 D. D. Williamson & Co., Inc. Fiber and method of making
US5133834A (en) * 1988-11-08 1992-07-28 Biofoam Industries, Inc. Process of forming an expanded lightweight foamed product from rice hulls
US5833940A (en) * 1987-07-28 1998-11-10 Enviroguard, Inc. Production of soluble silicates from biogenetic silica
US20050051287A1 (en) * 2003-09-08 2005-03-10 Wade Chute Chemimechanical desilication of nonwood plant materials
US20050067124A1 (en) * 1999-10-15 2005-03-31 Cargill, Incorporated Enhanced fiber additive; and use

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259501A (en) * 1964-06-11 1966-07-05 Delta Ind Inc Rice hull products and method
EP0283589A1 (en) * 1987-01-27 1988-09-28 Opta Food Ingredients, Inc. Dietary fiber and method of making
US5023103A (en) * 1987-01-27 1991-06-11 D. D. Williamson & Co., Inc. Fiber and method of making
US5833940A (en) * 1987-07-28 1998-11-10 Enviroguard, Inc. Production of soluble silicates from biogenetic silica
US4957599A (en) * 1988-04-15 1990-09-18 E. I. Du Pont De Nemours And Company Alkaline extraction, peroxide bleaching of nonwoody lignocellulosic substrates
US5133834A (en) * 1988-11-08 1992-07-28 Biofoam Industries, Inc. Process of forming an expanded lightweight foamed product from rice hulls
US20050191400A1 (en) * 1999-10-15 2005-09-01 Cargill, Incorporated Enhanced fiber additive; and use
US20050067124A1 (en) * 1999-10-15 2005-03-31 Cargill, Incorporated Enhanced fiber additive; and use
US20050183836A1 (en) * 1999-10-15 2005-08-25 Cargill, Incorporated Enhanced fiber additive; and use
US7837830B2 (en) 1999-10-15 2010-11-23 Cargill, Incorporated Plant seed based fiber products and processes
US8287691B2 (en) 1999-10-15 2012-10-16 Cargill, Incorporated Enhanced fiber additive; and use
US20050051287A1 (en) * 2003-09-08 2005-03-10 Wade Chute Chemimechanical desilication of nonwood plant materials
US7364640B2 (en) * 2003-09-08 2008-04-29 Alberta Research Council Inc. Chemimechanical desilication of nonwood plant materials

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