Preparation of aromatic polysulfonic acid compositions from light cat cycle oil
AssigneeExxonMobil Research and Engineering Company
InventorsRamesh Varadaraj, Cornelius Brons
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Abstract
A method for the preparation of a stream rich in aromatic polysulfonic acid compounds from light catalytic cycle oil. The preparation involves the polysulfonation of the light catalytic cycle oil using more than a stoichiometric amount of sulfuric acid. The aromatic polysulfonic acid compositions are preferably aromatic polynuclear compositions.
Claims19
A method for the production of aromatic polysulfonic acid compounds represented by the chemical structure:
- R—Ar—(SO3−X+)n
- where R is an alkyl group having from 0 to 40 carbon atoms, Ar is an aromatic ring structure comprised of from 2 to 15 aromatic rings, X is hydrogen or an alkali or alkaline-earth metal, and n is an integer from 1 to 5 when X is an alkali metal and 2 to 10 when X is an alkaline-earth meal, which method comprises:
- reacting a light catalytic cycle oil with sulfuric acid in a an amount from about 1.2 to 2 times the stoichiometric amount at a temperature from about 20° C. to about 100° C. for an effective amount of time thereby forming a reaction product;
- washing said reaction product with an organic solvent;
- neutralizing the washed reaction product with a suitable base to form the corresponding polysulfonic acid salt.
A method for the production of a light catalytic cycle oil stream rich in aromatic polysulfonic acid compounds which method comprises:
- reacting a light catalytic cycle oil with sulfuric acid in a an amount from about 1.2 to 2 times the stoichiometric amount at a temperature from about 20° C. to about 100° C. for an effective amount of time thereby forming a reaction product, thereby resulting in a light catalytic cycle oil rich in aromatic polysulfonic acid compounds.
A method for upgrading a heavy oil comprising the steps of:
- adding to said heavy oil an amount of light catalytic cycle oil containing an effective amount of aromatic polysulfonic acid compounds represented by the formula:
- R—Ar—(SO3−X+)n
- where R is an alkyl group having from 0 to 40 carbon atoms, Ar is an aromatic ring structure comprised of from 2 to 15 aromatic rings, X is hydrogen or an alkali or alkaline-earth metal, and n is an integer from 1 to 5 when X is an alkali metal and 2 to 10 when X is an alkaline-earth meal;
- and
- thermally treating said additized heavy oil at a temperature in the range of about 250° C. to 500° C. for 0.5 to 6 hours to upgrade the heavy oil.
Dependencies are inferred from the claim text.