US1868569A - Method of treating fibers for paper making and other uses - Google Patents

Description

Patented July 26, 1932 UNITED STATES PATENT OFFICE LOGAN A. DILS, OF CHICAGO, ILLINOIS, ASSIGNOR TO KELLOGG ISILS, INC. OF OHICAGO, ILLINOIS, A CORPORATION OF DELAWARE j METHOD OI-TREA'IING FIBERS FOR PAPER MAKING AND OTHER USES N0 Drawing. Application filed July 24, 1930, Serial No. 470,536. Renewed December 12, 1931.

This invention relates to a process of treating certain classes of woody fibers, such as hemp,flax straw, bagasse, and the. like, for the purpose of freeing the cellulose fibers thereof from the enveloping lignin in order to obtain the said fibers for paper making and other uses. With this object in view the invention consists, generally stated, in sub jecting the said Woody materials to the action of an aqueous solution of sodium borate, sodium hydroxide and trisodium phosphate at atmospheric pressure, for a period of time varying from ten to twenty minutes, depending upon the specific Woody material under treatment, at a temperature of approximately 220 F. to 225 F., and then taking the cooked woody materials and subjecting them to the action of a beater for a period varying from one -to three hours. When bagasse is thus cooked in a solution for a period varying from ten to fifteen minutes, and then subjected to the action of a beater for a period varying from one to three hours, the fibers are found to be of most excellent quality for certain classes of papers, such as a substitute for manila paper and cover stock.

The specific proportions of the chemicals employed may vary somewhat, but it has been found that the following formula gives most excellent results, that is, a solution composed of:

Y Per cent Water u 50 Sodium borate 39 Sodium hydroxide 10 Tri-sodium phosphate 1 The chemicals are first preferably mixed together until they begin to liquefy or assume the form of a thick heavy paste. This mixture of chemicals is then placed in an open vessel and the water added and the temperature brought up to approximately 220 F. by the application of extraneous heat, such, for example, as by the use of a gas burner.

The woody material, such .as hemp, flax straw, bagasse or the like, is then subjected to the action-of this solution for a period of approximately twelve minutes. The period of time maybe slightly less or slightly more to the action of an aqueous solution of sodium than this, depending somewhat upon the class of the material being treated, or cooked, as it is technically known.

After the woody material has thus been acted upon by said chemical solution, it is taken therefrom and placed in an ordinary beater of the kind usually employed in paper making plants. If old hemp rope forms the starting Woody material, it should be beaten for from fifteen to twenty minutes. With bagasse it has been found that beating for a period of one hour gives very satisfactory results as does beating for two or three hours.

By this process fibrous woody materials of the character indicated can be cooked at atmospheric pressure, within a period of about fifteen minutes, and then beaten, and is ready for use in paper making Within an hour or two'additional, and fibers of a very superior quality for use in paper making or other uses obtained.v

lVhat is claimed is:

1. The method of treating woody materials, which consists in subjecting the same to the action of an aqueous solution'of sodium borate, sodium hydroxide and .tri-sodium phosphate. v

2. The method of treating woody ma-- terials, which consists in subjecting the same borate, sodium hydroxide and tri-sodium phosphate at atmospheric pressure.

3. The method of treating woody materials, which consists in subjecting the same to the action of an a ueous solution of sod um borate, sodium' hy oxide and tri-sodium phosphate at atmospheric pressure for a period of approximately 12 minutes.

4. vThe method of treating woody materials, which consists in subjecting the same to the action of an aqueous solution of sod um borate, sodium hydroxide and tri-sodlum phosphate at a temperature of approximately 220 F. v

. 5. The method of treat1ng woody materiais, which consists in subjecting the same to the action of an aqueous solution of sodium borate, sodium hydroxide and trisodium, phosphate at atmospheric pressure and at a temperature of approximately 6. The method of treating woody materials, which consists in subjecting the same to the action of an aqueous solution of sodium borate, sodium hydroxide and tri-sodium phosphate for a period of approximately 12 terial from said solution and beating the same.

9. .The method of treating woody materials, which consists in subjecting the same to the action of an aqueous solution of sodium borate, sodium hydroxide and tri-sodium phosphate at atmospheric pressure and then removing the woody material from the solution andbeating the same. I

10. The method of treating woody materials,- which consists in subjecting the same to the action of an aqueous solution of sodium borate, sodium hydroxide and tri-sodium phosphate at atmospheric pressure for a. period of approximately 12 minutes and then. removing t e woody material from the solution and beating the same.

11. The method of treating woody materials, which consists in subjecting the same to the action of an aqueous so ution of sodium. borate, sodium hydroxide and tri-sodium phosphate at a temperature ofapproximate- 1y 220 F. and then removing the woody material'from the solution and beating the same.

12. The method of treating woody materials, which consists in subjecting the same to the action of an a ueous solution of sodium borate, sodium hy roxide and tri-sodium phosphate at atmospheric pressure and at a temperature of approximately 220 F. and

then removing the woody material from the solution and beating the same.

13. The method of treating woody materials, which consists in subjecting the same to the action of an aqueous solution of sodium.

borate, sodium hydroxide and tri-sodium phosphate for a period of approximately 12 minutes and then removin the woody material from the solution andieating the same.

14. The method of treating woody ma,-

terials, which consists in subjecting the same to the action of an aqueous solution of sodium borate,, sodium hydroxide and tri-sodium phosphate at atmospheric pressure for a period of approximately 12 minutes and at atemperature of about 220 F. and then removing the woody material from the solution and beating the same.

15. The method of treating woody materials, which consists in subjecting the same to the action of an aqueous solution of sodium borate, sodium hydroxide and tri-sodium phosphate and then removing the woody material from said solution and beating the same for from one to two hours.

16. The method of treating woody materials, which consists in subjecting the same to the action of an aqueous solution of sodium borate, sodium hydroxide and tri-sodium phosphate at atmospheric pressure and then removing the woody material from the solution and beating the same for from one to two hours.

17. The method of treating woody materials, which consists in subjecting the same to the action of an aqueous solution of sodium borate, sodium hydroxide and tri-sodium phosphate at atmospheric pressure for a period of approximately 12 minutes 'and then' removing the woody material from the solution and beating thesame for from one to two hours.

18. The method of treating woody mato the action of an aqueous solution of sodium borate, sodium hydroxide and tri-sodium.

phosphate at a temperature of approximately 220 F. and then removing the woody material from the solution and beating the same for from one to two hours.

19. The method of treating woody materials, which consists in subjecting the same to the action of an aqueous solution of sodium borate, sodium hydroxide and tri-sodium phosphate at atmospheric pressure and at a temperature of approximately 220 F. and then removing the woody material from the solution and beating the same for from one to two hours.

20. The method of treating woody materials, which consists in subjecting the same to the action of an aqueous solution of sodium borate, sodium hydroxide and tri-sodium phosphate for a period of approximately 12 minutes and then removing the woody material from the solution and beating the same for from one to two hours.

21. The method of treating woody materials, which consists in subjecting the same to. the action of an aqueous solution of sodium borate, sodium hydroxide and tri-sodium phosphate at atmospheric pressure for a period of approximately 12 minutes and at a temperature of about 220 F. and then removing the woody material from the solution and beating the same for from one to two hours.

22. The method of treating woody materials, which consists in subjecting "the same to a solution comprising approximately 50.

percent water, 39. per cent sodium borate, 10.

percent sodium hydroxide,- and 1. percent trisodium phosphate for a period of approxi mately 12 minutes.

25. The method of treating woody materials, which consists in subjecting the same to a solution comprising approximately 50. percent water, 39. percent sodium borate, 10, percent sodium hydroxide, and 1. percent trisodium phosphate, at a temperature of about 220 F.

26. The method of treating woody ma- 25 terials, which consists in subjecting the same to a solution comprising ap roximately-50.

percent water, 39. ercent sodium borate, 10. percent sodium hy roxide, and 1. percent trisodium phosphate at atmospheric pressure, for a period of approximately 12 minutes.

27. The method oftreating woody ma terials, which consist in subjecting the same to a solution comprising approximately 50. percent water, 39. ercent sodium borate, 10. I5 percent sodium hy roxide, and 1. percent trisodium phosphate at atmospheric. pressure at a temperature of about 220 F. 28. The method of treating woody materials, which consists in subjectingthe same 0 to a solution comprising approximately 50. percent water, 39. ercent sodium borate, 10. percent sodium hy roxide, and 1. percent trisodlum phosphate, at atmosphenc .pressure for a period of approximately 12 minutes and 5 at a temperature of about 220 F.

29. The method of treating woody materials, which consists in subjecting the same to a solutioncomprising ap roximately 50. percent water,-39. ercent sodium borate, 10. 1' percent sodium hy roxide,"and 1. percent trisodium phosphate, and then beating the same. i 30. The method of treating woody materials, which consists in subjecting the same to a solution comprising approximately 50. i percent water, 39. percent sodium borate, 10. percent sodium hydroxide, and 1. percent trisodium phosphate at atmospheric pressure, and then beating the same.

31. The method of treating woody materials, which consists in subjecting the same to a solution comprising approximately 50. percent water, 39. percent sodium borate, 10. percent sodium liy roxide, and 1. percent trisodium phosphate for a period of approximately 12 minutes, and then beating the same.

32. The method of treating woody materials, which consists in subjecting the same to a solution comprising approximately 50.

percent water, 39. ercent sodium borate, 10. percent sodium hy roxide, and 1. percent trisodium phosphate, at a temperature of about 2209' F., and then beating the same.

33. The method of treating woody materials, which consists in subjecting the same to a solution comprising approximately 50. percent water, 39. percent sodium borate, 10. percent sodium hydroxide, and 1. percent tri-sodium phosphate at atmospheric pressure, for a period of approximately 12 minutes, and then beating the same.

34. The method of treating woody materials, which consists in subjecting the same to a solution comprising approximately 50. percent water, 39. percent sodium borate, 10. percent sodium hydroxide, and percent tri-sodium phosphate at atmospheric pressure at a temperature of about 220 F., and thenbeating the same. I

35. The method of treating woody materials, which consists in subjecting the same to a solution comprising approximately 50.

percent water, 39. percent sodium borate, 10. percent sodium'hydroxide, and 1. percent tri-sodium phosphate, at atmospheric pressure -for a period of approximately 12 minutes and at a temperature of about 220 F., and then beating the same;

6. The process of treating bagasse, which consists in subjecting the same to an aqueous solution of sodium borate, sodium hydroxide and tri-sodium phosphate.

37. The process of treating bagasse, which consists in subjecting the same to an aqueous solution of sodium borate, sodium hydroxide and tri-sodium phosphate, at atmospheric pressure.

, 38. The process of treating bagasse, which consists in subjecting the same to an aqueous solution of sodium borate, sodiumhydroxide and tri-sodium phosphate, for approximately.

12 minutes.

39. The process of treating bagasse, which consists in subjecting the same to an aqueous solution of. sodium borate, sodium hydroxide and tri-sodium phosphate, at a temperature of about 220 F.

40. The process of treating bagasse, whichconsists in subjecting the same to an-aqueous solution of sodium borate, sodium hydroxide and tri-sodium phosphate, at atmospheric pressure, for approximately 12 minutes.

41. The process of treating bagasse, which consists in subjecting the same to an aqueous solution of sodium borate, sodium hydroxide and tri-sodium phosphate, at atmospheric pressure, at a temperature of about 220 F.

42. The process of treating bagasse, which consists in subjecting the same to an aqueous solution of sodium borate, sodium hydroxide and tri-sodiumphdsphate, for approximate 1y 12 minutes, andat a temperature of about 220 F 43. The process of treating bagasse, which consists in subjecting the same to an aqueous 5 solution of sodium borate, sodium hydroxide and tri-sodium phosphate, and then beating the same. 1 44. The process of treating bagasse, which. consists in subjecting the same to an aqueous solution of sodium borate, sodium hydroxide and tri-sodium phosphate, at atmospheric pressure, and thenbeating the same. j 45. The process oft-mating bagasse, which I consists in subjecting the same ,to an aqueous solution of sodiumborate, sodium hydroxide and tri-sodium phosphatefior approximately 12 minutes, and then beating the same.

46. The process of treating bagasse, which consists in subjecting the same to. an aqueous solution'of sodium borate, sodium hydroxide and tri-sodium phosphate, at a temperature of about 220 F., and then beating the same.

47 The process of treating bagasse, which consists in subjecting the same to an aqueous solution of sodium borate, sodium hydroxide and tri-sodium phosphate, at atmospheric pressure, for approximately 12 minutes, and y then beating the same.

48. The process of treating bagasse, which consists in subjecting the same to an aqueous solution of sodium borate, sodium hydroxide,

and tri-sodium phosphate, at atmospheric pressure, at a temperature of about 220 F.,

and then beating the same.

49. The process of treating bagasse, which consists in subjecting thesame to an aqueous solution of sodiumborate, sodium hydroxide and tri-sodium phosphate, for approximately 12 minutes, and at a temperature of about 40 220 F., and then beating the same.

50. The process ,of treating bagasse which. consists in subjecting the same for about 12 minutes to the action of a solution comprising approximately the following proportions: Water 50.%; sodium borate 39.%; sodium hydroxide l0.% and tri-sodium phosphate 1.%, at a temperature of about 51. The process of treating bagasse which consists in subjecting the same for about 12 minutes to the-action of a solution compris- 4 ing approximately thefollowing proportions: Water 50.%; .sodium borate 39.%; sodium hydroxide l0.%; and tri-sodium 55 phosphate l.%, at a temperature of about 220 F., and then beatingthe bagasse for from one to three hours.

In testimony whereof I have signed this specification. LOGAN DILS.