Laundry sanitizing and softening compositions
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Powders and granules and process for making such powders and granules
US12545868B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12545868-B2 |
| Application number | US-202017786303-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 4, 2020 |
| Priority date | Dec 18, 2019 |
| Publication date | Feb 10, 2026 |
| Grant date | Feb 10, 2026 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
The present invention is directed towards a process for making a powder or granule containing (A) at least one alkali metal salt of citric acid, and at least one additive selected from (B) at least one (co)polymer containing carboxylic acid groups, partially neutralized with alkali, in a weight ratio of (A):(B) of from 5:1 up to 100:1, wherein said powder or granule contains at least 75% by weight of citrate (A), said process comprising the steps of (a) mixing the at least one alkali metal salt of citric acid (A) and the at least one (co)polymer (B) in the presence of water, (b) removing most of said water by spray-drying or spray granulation using a gas with an inlet temperature of at least 125° C.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A process for making a powder or granule containing (A) at least one alkali metal salt of citric acid, and at least one additive selected from (B) (co) polymer(s) comprising carboxylic acid groups, partially neutralized with alkali, in a weight ratio of (A):(B) of from 5:1 up to 100:1, wherein said powder or granule contains at least 75% by weight of citrate (A), referring to the solids content of said powder or granule, said process comprising the steps of (a) mixing the at least one alkali metal salt of citric acid (A) and the at least one (co) polymer (B) in the presence of water, and (b) removing most of said water by spray-drying or spray granulation using a gas with an inlet temperature of at least 125° C. 2 . The process according to claim 1 , wherein (A) is trisodium salt of citric acid. 3 . The process according to claim 1 , wherein (co)polymer (B) is selected from polyacrylic acid, random copolymers of acrylic acid with maleic anhydride or 2-acrylamido-2-methylpropanesulfonic acid, each (co) polymer being partially selected with alkali. 4 . The process according to claim 1 , wherein step (b) is performed with a two-fluid nozzle.
Assignees
Inventors
Classifications
Carboxylic acids or salts thereof · CPC title
Polycarboxylic acids-salts thereof · CPC title
Carboxylic acids-salts thereof · CPC title
Hard surfaces · CPC title
Preparation in the form of powder by spray drying · CPC title
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- What does patent US12545868B2 cover?
- The present invention is directed towards a process for making a powder or granule containing (A) at least one alkali metal salt of citric acid, and at least one additive selected from (B) at least one (co)polymer containing carboxylic acid groups, partially neutralized with alkali, in a weight ratio of (A):(B) of from 5:1 up to 100:1, wherein said powder or granule cont…
- Who is the assignee on this patent?
- Basf Se
- What technology area does this patent fall under?
- Primary CPC classification C11D3/2086. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 10 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).