Synthesis of an overbased detergent from sludge coming from the production of high BN overbased alkylaryl sulfonate or overbased sulfurized alkylphenate
US6313336A · kind A · utility
1Cited by
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15Claims
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Key dates
| Filing date | Oct 26, 2000 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Oct 26, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M159/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for using sludge formed in the preparation of a high BN overbased alkylaryl sulfonate or overbased sulfurized alkylphenate, wherein the sludge is treated with an acidic reactant to convert large particles of the alkaline earth metal salt in the sludge into calcium sulfonate, then is reacted with an excess of alkaline earth base and either alkylaryl sulfonic acid or alkylphenol to produce a reaction product, which could be a low or high overbased alkylaryl sulfonate or overbased sulfurized alkylphenate.
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