Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
  • C11D3/06—Phosphates, including polyphosphates
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
  • C11D3/06—Phosphates, including polyphosphates
  • C11D3/062—Special methods concerning phosphates
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/162—Organic compounds containing Si

Definitions

• the present invention relates to a new sodium tripolyphosphate specially adapted for the preparation of liquid detergent formulas.
• European patent application 178 989 which describes a sodium tripolyphosphate containing at least 50% of phase 1, an average particle size of between 130 and 250 microns, a water content of between 0.4 and 4%, this water being present in the form of crystals of sodium tripolyphosphate hexahydrate; homogeneously distributed in each particle size fraction of the product.
• This tripolyphosphate was designed for the preparation of liquid formulations. However, it has the disadvantage during its implementation of forming lumps in the aqueous solution.
• the present invention has solved this problem. It consists in using a new sodium tripolyphosphate consisting of a tripolyphosphate as described in patent EP 178 986 containing at least 50% of phase 1 and preferably at least 70%, an average particle size of between 80 and 200 microns , a weight content of water of between 0.8 and 6% in the form essentially of sodium tripolyphosphate hexahydrate and a weight content of siliconate of between 0.2 and 2% calculated relative to the tripolyphosphate.
• the siliconate used is a compound of formula (I) below: in which : R represents a methyl or ethyl group M represents an alkali metal chosen from sodium or potassium
• the TPP according to the invention has an RRB (Rosin Ramler Benett) particle size of between 80 and 200 microns and does not have more than 0.5% of particles greater than 400 microns. It is further preferred that its particle size is between 100 and 150 microns and its phase 1 content is at least 70%.
• RRB Rosin Ramler Benett
• siliconate which allows better dispersion of the tripolyphosphate in water does not, on the other hand, cause a reduction in "ROH", therefore a reduction in the hydration capacity of the tripolyphosphate.
• siliconate is a hydrophobic product which should tend to prevent contact between water and tripolyphosphate and therefore should slow hydration.
• the siliconate increases the dispersion of the tripolyphosphate which has a markedly stronger effect than the slowing down of hydration due to its hydrophobic effect, the whole results in a marked increase in the speed d hydration and the disappearance of the agglomeration phenomenon.
• the process for the preparation of this modified tripolyphosphate consists in starting with an anhydrous tripolyphosphate containing at least 50% of phase 1 and having a particle size between 600 and 2500 microns to be sprayed on an aqueous solution containing by weight 5 to 50% of siliconate ( active ingredient) and containing possibly dissolved tripolyphosphate.
• a coarse primary grinding of this TPP is then carried out by any known means.
• this primary grinding is carried out so as to obtain a product having an average diameter RRB (Rosin Ramler Benett) of between 600 and 2500 microns.
• RRB Rasin Ramler Benett
• the ground tripolyphosphate is then prehydrated by spraying it with an aqueous siliconate solution optionally supplemented with tripolyphosphate in suspension.
• This possible suspension is prepared by adding to water containing the siliconate a sufficient amount of anhydrous TPP to be in supersaturation.
• a suspension is prepared with a TPP content ranging from 30 to 35% of TPP.
• a TPP preferably having the same characteristic of phase 1 distribution homogeneity as that described above for the TPP of the invention is preferably used. Under these conditions, the TPP will transform into hexahydrate in the suspension.
• the spraying is done by any suitable means. Generally, the amount of sprayed suspension is 2 to 6% by weight relative to the anhydrous TPP.
• the prehydrated TPP is subjected to a secondary grinding which brings it to the particle size of the finished product, defined by the average diameter RRB, between 80 and 200 microns, and a maximum refusal of 0.5%. at 400 microns. It is this secondary grinding which makes it possible to achieve the homogeneous distribution of the crystals of TPP hexahydrate over each fraction of the particle size population.
• the product is then subjected to a ripening phase comprising ventilation and cooling.
• Hydrated TPP containing siliconate is used to prepare liquid detergent compositions.
• the products after emptying the mixer, ripen for around 24 hours on a tray, at room temperature, for crystallization. They are sieved on a 400 ⁇ sieve to remove any particles, crushing or agglomeration, larger than this size.
• the dispersibility test is as follows:

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• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Inorganic Chemistry (AREA)
• Detergent Compositions (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9368587

Family Applications (1)

Country Status (12)

Families Citing this family (2)

Citations (1)

Family Cites Families (4)

• 1988
  • 1988-07-20 FR FR8809794A patent/FR2634474A1/fr active Pending
• 1989
  • 1989-06-20 JP JP1155925A patent/JPH0273897A/ja active Pending
  • 1989-07-13 EP EP89402009A patent/EP0352173A1/fr not_active Withdrawn
  • 1989-07-18 US US07/381,271 patent/US4992196A/en not_active Expired - Fee Related
  • 1989-07-18 NO NO89892940A patent/NO892940L/no unknown
  • 1989-07-19 DK DK357289A patent/DK357289A/da not_active Application Discontinuation
  • 1989-07-19 DK DK357389A patent/DK357389A/da not_active Application Discontinuation
  • 1989-07-19 ZA ZA895492A patent/ZA895492B/xx unknown
  • 1989-07-19 PT PT91214A patent/PT91214A/pt unknown
  • 1989-07-19 FI FI893495A patent/FI893495L/fi not_active Application Discontinuation
  • 1989-07-19 BR BR898903575A patent/BR8903575A/pt unknown
  • 1989-07-20 KR KR1019890010310A patent/KR900001830A/ko not_active Application Discontinuation
  • 1989-07-20 PT PT91232A patent/PT91232A/pt not_active Application Discontinuation
  • 1989-07-20 TN TNTNSN89079A patent/TNSN89079A1/fr unknown
  • 1989-07-20 TN TNTNSN89080A patent/TNSN89080A1/fr unknown

Patent Citations (1)

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