US2977314A - Borate-hypochlorite bleach - Google Patents

Borate-hypochlorite bleach Download PDF

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Publication number
US2977314A
US2977314A US824778A US82477859A US2977314A US 2977314 A US2977314 A US 2977314A US 824778 A US824778 A US 824778A US 82477859 A US82477859 A US 82477859A US 2977314 A US2977314 A US 2977314A
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US
United States
Prior art keywords
borate
mole
hypochlorite
bleach
sodium
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 - Lifetime
Application number
US824778A
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English (en)
Inventor
Stephen E Stephanou
Lawrence L Schwalley
Sam H Lee
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.)
US Borax Inc
Original Assignee
United States Borax and Chemical Corp
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
Priority to NL235229D priority Critical patent/NL235229A/xx
Priority to BE574663D priority patent/BE574663A/xx
Priority to NL125133D priority patent/NL125133C/xx
Priority to GB39414/58A priority patent/GB863288A/en
Priority to FR1214478D priority patent/FR1214478A/fr
Priority to DEU5907A priority patent/DE1119234B/de
Priority to CH6840459A priority patent/CH362395A/de
Application filed by United States Borax and Chemical Corp filed Critical United States Borax and Chemical Corp
Priority to US824778A priority patent/US2977314A/en
Priority to GB25/60A priority patent/GB867067A/en
Priority to CH80760A priority patent/CH370738A/de
Priority to FR818382A priority patent/FR77150E/fr
Priority to BE587734A priority patent/BE587734R/fr
Priority to ES0256927A priority patent/ES256927A1/es
Application granted granted Critical
Publication of US2977314A publication Critical patent/US2977314A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/20—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen
    • D06L4/22—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents
    • D06L4/23—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents using hypohalogenites

Definitions

  • This invention relates to new and novel compositions of matter and has more particular reference to boratehypochlorite bleach compositions and method for making the same.
  • sodium hypochlorite containing materials have not previously attained commercial success as solid bleaches due to their extreme hygroscopicity and instability.
  • Various methods for the manufacture of sodium hypochlorite in solid form have been described such as by mixing sodium hypochlorite solution with soluble anhydrous salts capable of taking their water of crystallization from the hypochlorite and of solidifying into a crystalline mass. We have found, however, that it is not possible to produce commercially acceptable products by these prior art methods since they are not sufiiciently stable.
  • a further object of this invention is to provide a method of making ble'ach compositions having stability heretofore unattained by prior art bleach compositions.
  • a still further object is to provide a method of making the borate-hypochlorite compositions of the present invention.
  • the present invention comprises a stable borate-hypochlorite bleach in a solid substantially dry form, said borate-hypochlorite composition having from 0.029 to 0.36 mole of (OCl-) per mole of B 0 and from 0.30 to 0.90 mole of X 0 per mole of B 0 where X is at least one material selected from the group consisting of the alkali metals, said X 0 comprising the titratable alkalinity of said borate-hypochlorite.
  • the products of the present invention are defined as having critical (OCl"') B 0 and X 0 B 0 mole ratios.
  • the X20 comprises only the titratable alkalinity calculated as X 0 from hypochlorites and borates.
  • the titratable alkalinity is readily determined by potentiometric titration, a technique known to those skilled in the art.
  • the present process involves the chlorination of an alkali metal borate or the addition of an alkali metal borate to sodium hypochlorite.
  • the starting admixture can be prepared in a number of ways. For example, borax and caustic soda; sodium metaborate; potassium metaborate; borax and boric acid; lithium borate and borax; potassium borate and caustic soda; sodium metaborate and boric acid; boric acid and sodium or potassium hydroxides and various other combinations of these borates can be used in the production of the boratehypochlorite compositions of the present invention.
  • the present compositions can be prepared in a number of ways.
  • the present bleaches can also be prepared by the dry admixing of borax and caustic soda and then chlorinating the admixture with chlorine gas.
  • the present materials can be prepared by the use of alkali metal hypochlorites or chlorine gas introduced into an aqueous slurry or dry powder. If direct chlorination is used the desired endpoint for chlorination can be achieved by continuous measurement of pH or by chemical analysis. The chlorine or chlorine containing material can also be calculated and added in the required total amount.
  • alkali metal borate can be used to produce the present products.
  • Sodium borate and potassium borate can be simultaneously chlorinated or a sodium borate can be reacted with NaOH and KOH and then chlorinated.
  • the total X 0 must remain in the range indicated above.
  • drying any of the well-known methods of drying, such as vacuum oven drying, spray drying, drum drying, forced air drying, etc., can be used as long as such drying can be performed rapidly.
  • compositions may be either in crystalline or amorphous form. In any event rapid drying methods must be used to avoid decomposition due to overheating.
  • dry is meant to convey a material having no free water.
  • our finished compositions contain varying amounts of chemically combined water or water of crystalliza- G17 tion, the material is dry in that there is substantially no free or chemically uncombined water.
  • the slurry was then pi t through a drum dryer.
  • the drum dryer comprised two rolls having 0.010 clearance and an internal steam pressure of 60#/sq. in.-this'gave an external roll temperature of 153 C. The rolls were rotated 8 r.p.m. which gave a material contact time of 3.85 seconds.
  • the resultant product was a free-flowing stable solid bleach which analyzed about 6.6% available chlorine and had (001") B 0 and Na O B 0 mole ratios of 0.151 and 0.458, respectively.
  • Dry chlorine 72 grams was passedinto the mixture 7 while stirring (showed a pH of 9.3 upon 1:10 by weight bleach which analyzed 5.5% available chlorine and had ple of the supernatant liquid from the slurry showed a pH of 9.6-9.8 upon a 1:10 by weight dilution.
  • the slurry was dried as above and resulted in a freeflowing solid which analyzed 5.66% available chlorine and had final (OC1-) B 0 and Na O B 0 mole ratios of 0.148 and 0.66, respectively.
  • the chlorinated slurry was then dried in a direct gasfiredspray drier having an inlet temperature of 400 F.
  • the resultant product was a free-flowingstable solid bleach which analyzed 3.0% available chlorine and final (OCl-) B 0 and Na O B 0 mole ratios. of 0.077 and 0.56, respectively.
  • the available chlorine content of the solid material of the above examples was measured by using the standard potassium iodide-thiosulfate titration.
  • a composition of matter consisting essentially of a stable borate-hypochlorite bleach in a solid substantially dry form, said borate-hypochlon'te havingfrom 0.029. to
  • composition of matter consisting essentially of a stable borate-hypochlorite bleach in a solid substantially.
  • borate-hypochlor-ite having from 0.15 to one material selected from the group consisting of the alkali metals and said X 0 comprising the titratable alkalinity of said borate-hypochlorite composition.
  • a composition of matter consisting essentially of a stable sodium borate-hypoohlorite bleach in a solid substantially dry form, said sodium borate-hypochlorite having from 0.029 to 0.36 mole of (OCl-) per mole of B 0 and from 0.30 to 0.90 mole of Na O per mole of B 0 said Na O comprising the titratable alkalinity of said sodium borate-hypochlorite composition.
  • the method of making a stable alkali metal boratehypochlorite bleach in a solid substantially dry form which comprises making an aqueous solution of caustic 'soda," chlorinating said caustic soda solution, slurrying into said chlorinated caustic soda solution at least one material selected from the class consisting of the alkali metal borates and boric acid and rapidly drying said slurry, said ingredients added in such proportion that the resultant product has from 0.029 to 0.36 mole of 001-) per mole of B 0 and from 0.30 to 0.90 mole of X 0 per mole of B 0 where X is a material selected from the group consisting of the alkali metals, and X 0 comprises the titratable alkalinity of said alkali metal borate-hypochlorite bleach.
  • the method of making a stable alkali metal boratehypochlorite bleach in a solid substantially dry form which comprises chlorinating an admixture consisting essentially of at least one material selected from the group consisting of the alkali metal borates and boric acid and at least one material selected from the group consisting of sodium hydroxide and potassium hydroxide and rapidly drying said chlorinated mass, said ingredients added in such proportion that the resultant product has from 0.029 to 0.36 mole of (001-) per mole of B 0 and from 0.30 to 0.90 mole of (OCl'-) per mole of B 0 wherein X is a material selected from the group consisting of the alkali metals and said X 0 comprises the titratable alkalinity of said alkali metal-hypochlorite bleach.
  • the method of making a stable sodium borate-hypochlorite bleach in a solid substantially dry form which comprises making an aqueous caustic soda solution, chlorinating said aqueous caustic soda solution, slurrying into said chlorinated caustic soda solution at least one material selected from the group consisting of the sodium borates and boric acid and rapidly drying said slurry, said ingredients added in such proportion that the resultant product has from 0.15 to 0.20 mole of (001-) per mole of B 0 and from 0.30 to 0.60 mole of Na O per mole of B 0 said Na O comprising the titratable alkalinity'of said sodium borate-hypochlorite bleach.
  • a stable sodium borate-hypochlorite bleach in a solid substantially dry form which comprises chlorinating an admixture consisting essentially of sodium hydroxide and at least one material selected from the group consisting of the sodium borates and boric acid and rapidly drying said chlorinated mass, said ingredients added in such proportion that the resultant product has from 0.15 to 0.20 mole of (001-) per mole of B 0 and from 0.30 to 0.60 mole of Na O per mole of B 0 said Na O comprising the titratable alkalinity of said sodium borate-hydrochlorite.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detergent Compositions (AREA)
US824778A 1958-01-17 1959-07-03 Borate-hypochlorite bleach Expired - Lifetime US2977314A (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
NL235229D NL235229A (fr) 1958-01-17
BE574663D BE574663A (fr) 1958-01-17
NL125133D NL125133C (fr) 1958-01-17
GB39414/58A GB863288A (en) 1958-01-17 1958-12-08 Improvements in and relating to bleaching compositions
FR1214478D FR1214478A (fr) 1958-01-17 1959-01-07 Compositions pour blanchiment, à base de chlorates et d'hypochlorites
DEU5907A DE1119234B (de) 1958-01-17 1959-01-15 Verfahren zur Herstellung von Bleichmitteln
CH6840459A CH362395A (de) 1958-01-17 1959-01-16 Haltbares, festes Bleichmittel und Verfahren zu dessen Herstellung
US824778A US2977314A (en) 1959-07-03 1959-07-03 Borate-hypochlorite bleach
GB25/60A GB867067A (en) 1958-01-17 1960-01-01 Improvements in and relating to bleaching compositions
CH80760A CH370738A (de) 1958-01-17 1960-01-25 Haltbares, festes Bleichmittel sowie Verfahren zu dessen Herstellung
FR818382A FR77150E (fr) 1958-01-17 1960-02-12 Compositions pour blanchiment, à base de chlorates et d'hypochlorites
BE587734A BE587734R (fr) 1959-07-03 1960-02-17 Compositions pour blanchiment, à base de chlorates et d'hypochlorites.
ES0256927A ES256927A1 (es) 1959-07-03 1960-03-29 Procedimiento de obtenciën de una composiciën de blanqueo que contenga un borato y un hipoclorito de un metal alcalino

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US824778A US2977314A (en) 1959-07-03 1959-07-03 Borate-hypochlorite bleach

Publications (1)

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US2977314A true US2977314A (en) 1961-03-28

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US824778A Expired - Lifetime US2977314A (en) 1958-01-17 1959-07-03 Borate-hypochlorite bleach

Country Status (3)

Country Link
US (1) US2977314A (fr)
BE (1) BE587734R (fr)
ES (1) ES256927A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3154494A (en) * 1961-08-07 1964-10-27 United States Borax Chem Fabric laundry compositions
US3793216A (en) * 1971-12-06 1974-02-19 Pennwalt Corp Calcium hypochlorite composition
US4526699A (en) * 1983-10-17 1985-07-02 Fmc Corporation Encapsulated bleach composition and method of preparation
US11235975B2 (en) * 2019-05-06 2022-02-01 Trudx, Inc. Stabilized sodium chlorite solution and a method of remediating an aqueous system using the solution

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1522561A (en) * 1923-12-21 1925-01-13 John D Cardinell Bleaching solution
US2034361A (en) * 1929-03-23 1936-03-17 Roy C Sutton Alkaline detergent powder and method of making the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1522561A (en) * 1923-12-21 1925-01-13 John D Cardinell Bleaching solution
US2034361A (en) * 1929-03-23 1936-03-17 Roy C Sutton Alkaline detergent powder and method of making the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3154494A (en) * 1961-08-07 1964-10-27 United States Borax Chem Fabric laundry compositions
US3793216A (en) * 1971-12-06 1974-02-19 Pennwalt Corp Calcium hypochlorite composition
US4526699A (en) * 1983-10-17 1985-07-02 Fmc Corporation Encapsulated bleach composition and method of preparation
US11235975B2 (en) * 2019-05-06 2022-02-01 Trudx, Inc. Stabilized sodium chlorite solution and a method of remediating an aqueous system using the solution

Also Published As

Publication number Publication date
BE587734R (fr) 1960-06-16
ES256927A1 (es) 1960-06-01

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