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US3844969A Expired / Lapsed US ⏱️ 0.0 years remaining

Production of detergent compositions

Assignee: Lever Brothers Co
•
Filing: 1971-07-06
•
Granted: 1974-10-29
•
Expires: 1991-07-06
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Abstract

Abstract A detergent powder containing a synthetic detergent active compound and an organic detergency builder is prepared by forming an aqueous slurry of detergent ingredients containing not more than 40 percent by weight of the slurry of water in a pressurised vessel at a temperature of from about 125*C to 180*C and subsequently spraying the slurry into a gas stream at a temperature of from about 100* to 250*C. The process is particularly useful for producing powders of high organic content, for which there can be a fire or explosion hazard in using conventional spray-drying processes at higher temperatures. The process can also give significant economic benefits.

Inventors

  • 👤 J Griffiths
  • 👤 R Wilde

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 05:30
CPC Classifications
C; C11; C11D; C11D11/00; C11D11/02; C11D1/00; C11D1/02; C11D1/04; C11D1/12; C11D1/14; C11D1/143; C11D1/28; C11D3/00; C11D3/16; C11D3/20; C11D3/2075; C11D3/26; C11D3/33; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3761

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 206 words
A PROCESS FOR THE PREPARATION OF A DETERGENT POWDER HAVING AN ORGANIC CONTENT OF FROM 50-80 PERCENT, SAID ORGANIC CONTENT CONSISTING ESSENTIALLY OF A SYNTHETIC ANIONIC, NONIONIC ZWITTERNIONIC OR AMPHOTERIC DETERGENT ACTIVE COMPOUND WHICH IS PRESENT IN AN AMOUNT OF FROM ABOUT 10-50 PERCENT BY WEIGHT OF THE TOTAL COMPOSITION, AN ORGANIC DETERGENCY BUILDER WHICH IS PRESENT BY WEIGHT IN AN AMOUNT OF FROM ABOUT 27 TO ABOUT PERCENT BY WEIGHT OF THE TOTAL COMPOSITION SAID BUILDER BEING SELECTED FROM THE GROUP CONSISTING OF A-SULPHONATED FATTY ACIDS, HIGHER ALKANE DISULFONES AND SULFINATE-SULFONATES SOAPS, SODIUM POLYACRYLIC, SODIUM POLYMALALEATE AND SODIUM COPOLYMETHYLENE MALEATE, OXIDIZED POLYSACCHARIDES, SODIUM OXYDIACETTE, SODIUM CARBOXYMETHYLOXYSUCCINATE, SODIUM NITROLTRIACETATE, THE WATER SOLUBLE SALTS OF DICARBOXYLIC ACIDS OF THE FORMULA R.CH(COOH)(CH2)N.COOH WHEN N IS 0 OR1 AND R IS A PRIMARY OR SECONDARY STRAIGHT CHAIN ALKYL OR ALKENYL GROUP CONTAINING FROM 10 TO 20 CARBON ATOMS AND MIXTURES THEREOF, WHICH PROCESS COMPRISES FROMING AN AQUEOUS SLURRY OF DETERGENT INGREDIENTS CONTAINING FROM ABOUT 20 TO ABOUT 40 PERCENT BY WEIGHT OF THE SLURRY OF WATER IN A PRESSURIZED VESSEL AT A TEMPERATURE OF FROM ABOUT 125*C TO 180*C AND SUBSEQUENTLY SPARY-DRYING THE SLURRY IN A STREAM OF GAS AT A TEMPERATURE OF FROM ABOUT 100*C TO ABOUT 250*C.
Claim 2
Dependent Claim 206 words
A PROCESS FOR THE PREPARATION OF A DETERGENT POWDER HAVING AN ORGANIC CONTENT OF FROM 50-80 PERCENT, SAID ORGANIC CONTENT CONSISTING ESSENTIALLY OF A SYNTHETIC ANIONIC, NONIONIC ZWITTERNIONIC OR AMPHOTERIC DETERGENT ACTIVE COMPOUND WHICH IS PRESENT IN AN AMOUNT OF FROM ABOUT 10-50 PERCENT BY WEIGHT OF THE TOTAL COMPOSITION, AN ORGANIC DETERGENCY BUILDER WHICH IS PRESENT BY WEIGHT IN AN AMOUNT OF FROM ABOUT 27 TO ABOUT PERCENT BY WEIGHT OF THE TOTAL COMPOSITION SAID BUILDER BEING SELECTED FROM THE GROUP CONSISTING OF A-SULPHONATED FATTY ACIDS, HIGHER ALKANE DISULFONES AND SULFINATE-SULFONATES SOAPS, SODIUM POLYACRYLIC, SODIUM POLYMALALEATE AND SODIUM COPOLYMETHYLENE MALEATE, OXIDIZED POLYSACCHARIDES, SODIUM OXYDIACETTE, SODIUM CARBOXYMETHYLOXYSUCCINATE, SODIUM NITROLTRIACETATE, THE WATER SOLUBLE SALTS OF DICARBOXYLIC ACIDS OF THE FORMULA R.CH(COOH)(CH2)N.COOH WHEN N IS 0 OR1 AND R IS A PRIMARY OR SECONDARY STRAIGHT CHAIN ALKYL OR ALKENYL GROUP CONTAINING FROM 10 TO 20 CARBON ATOMS AND MIXTURES THEREOF, WHICH PROCESS COMPRISES FROMING AN AQUEOUS SLURRY OF DETERGENT INGREDIENTS CONTAINING FROM ABOUT 20 TO ABOUT 40 PERCENT BY WEIGHT OF THE SLURRY OF WATER IN A PRESSURIZED VESSEL AT A TEMPERATURE OF FROM ABOUT 125*C TO 180*C AND SUBSEQUENTLY SPARY-DRYING THE SLURRY IN A STREAM OF GAS AT A TEMPERATURE OF FROM ABOUT 100*C TO ABOUT 250*C.
Claim 3
Dependent Claim 22 words
A process according to claim 1, wherein the water content of the slurry is not more than about 30 percent by weight.

References Cited (Backward Citations)

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US2798544A Cited
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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-10-28 1978-04-29 1978-10-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-10-28 1982-04-29 1982-10-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-10-28 1986-04-29 1986-10-29 $7700.00 Window Closed / Lapsed

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