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US 2018/0179243 A1Published application
Magnesium sulfonate synthesis
AssigneeInfineum International Limited
InventorsPhilip Skinner, Daniel J. Phillips, Adam P. Marsh, Thomas D. Wilkinson
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Abstract
An overbased magnesium sulfonate detergent is made by (A) preparing a mixture of a sulfonic acid or salt with a magnesium oxide, water, a C1-C5 alkanol, a hydrocarbon solvent, and a combination of a polyisobutene succinic anhydride of molecular weight (Mw) 500 to 1500 g mol−1 and a salicylic acid as first and second promoters; and (B) carbonating the mixture with an acidic gas to form the overbased magnesium sulfonate.
Claims17
A process for the preparation of an overbased magnesium sulfonate comprising:
- (A) preparing a mixture of a sulfonic acid or salt thereof, a magnesium oxide, water, a C1-C5 alkanol, a hydrocarbon solvent and a promoter system comprising a combination of a first promoter and second promoter, wherein
- said first promoter is a polyisobutene succinic anhydride having a weight average molecular weight of from about 500 to about 1500 g mol−1, which is present in the range of 1-200 g per kg of overbased magnesium sulfonate product, and said second promoter is a salicylic acid, which is present in the range of 1-20 g per kg of overbased magnesium sulfonate product;
- and
- (B) carbonating the mixture with an acidic gas to form the overbased magnesium sulfonate.
1 more element
Dependencies are inferred from the claim text.