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EP0168102A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

A process for the preparation of a powder detergent composition of high bulk density

Assignee: Unilever PLC
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Filing: 1985-06-28
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Granted: —
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Expires: 2005-06-28
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Abstract

Abstract The invention relates to a process for the preparation of a nonionic surfactant-containing powder detergent composition wherein a spray-dried sodium sulphate-free base powder containing a portion of the nonionic surfactant is obtained and the remaining portion of the nonionic surfactant is in part sprayed onto the base powder and in part added subsequently in a form obtained by granulation with a carrier containing a mixture of zeolite and alkali meta perborate monhydrate and wherein the other detergent components are added subsequently to the base powder. A detergent composition prepared in this manner has a high bulk density despite its high AD content.

Inventors

  • 👤 Klaus Czempik
  • 👤 Gerd Stremmel

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 18:45
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/06; C11D17/065; C11D1/00; C11D1/66; C11D1/72; C11D11/00; C11D11/02; C11D3/00; C11D3/02; C11D3/12; C11D3/124; C11D3/1246; C11D3/128; C11D3/39; C11D3/3942

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 104 words
A process for the preparation of a nonionic surfactant-containing powder detergent composition having a high AD content and a high bulk density, wherein a spray-dried base powder containing a protion of the nonionic surfactant is obtained and the remaining portion of the nonionic surfactant is in part sprayed onto the base powder and in part added subsequently in a form obtained by granulation with a carrier and wherein the other detergent components are subsequently added to the base powder,the base powder being essentially free of sodium sulphate and the carrier for the nonionic surfactant comprising a mixture of zeolite and alkali metal perborate monohydrate.
Claim 2
Dependent Claim 104 words
A process for the preparation of a nonionic surfactant-containing powder detergent composition having a high AD content and a high bulk density, wherein a spray-dried base powder containing a protion of the nonionic surfactant is obtained and the remaining portion of the nonionic surfactant is in part sprayed onto the base powder and in part added subsequently in a form obtained by granulation with a carrier and wherein the other detergent components are subsequently added to the base powder,the base powder being essentially free of sodium sulphate and the carrier for the nonionic surfactant comprising a mixture of zeolite and alkali metal perborate monohydrate.
Claim 3
Dependent Claim 18 words
A process according to claim 1 wherein the detergent composition comprises a mixture of nonionic and anionic surfactants.
Claim 4
Dependent Claim 14 words
A process according to claim 1 or 2 wherein the base powder contains zeolites.
Claim 5
Dependent Claim 45 words
A process according to claims 1 to 3 wherein the base powder contains less than one-half of the total quantity of nonionic surfactant and not more than one-half of the remaining portion of the total quantity of nonionic surfactant is sprayed onto the base powder.
Claim 6
Dependent Claim 26 words
A process according to claims 1 to 4, wherein a portion of an anionic surfactant is sprayed onto the base powder together with the nonionic surfactant.
Claim 7
Dependent Claim 29 words
A process according to claims 1 to 5 wherein a portion of an anionic surfactant is sprayed together with the nonionic surfactant onto the carrier mixture of the granulate.

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