Patent GB-173757-A (GB)
Title: Manufacture of salts of sulphonated coumarone resins
IPC: C14C3/22
Filed: 1921-12-30
Abstract: Coumarone resins are sulphonated with concentrated or fuming sulphuric acid and the product then treated with salts, particularly oxides, hydroxides and carbonates, of iron, chromium, or aluminium. According to the examples:-(1) coumarone resin is sulphonated with fuming sulphuric acid, the aqueous solution of the product nearly neutralized with caustic alkali, and freshly-prepared iron or aluminium hydroxide then added; the solution may, if desired, be evaporated to dryness; (2) coumarone resin is treated with concentrated or fuming sulphuric acid and calcium carbonate added to neutralize the solution and produce the calcium sulphonate; after filtration, a quantity of aluminium, chromium or iron sulphate equivalent to the lime present is added and the solution again filtered.  The Specification as open to inspection under Sect. 91 (3) (a) includes an example in which coumarone resin is sulphonated with concentrated or fuming sulphuric acid and the aqueous solution then just neutralized with freshly-precipitated chromium, iron or aluminium hydroxide.  This subject-matter does not appear in the Specification as accepted.ALSO:Coumarone resins are sulphonated with concentrated or fuming sulphuric acid and the product then treated with salts, particularly oxides, hydroxides and carbonates, of iron, chromium or aluminium.  The resulting metal sulphonates are soluble in water and can be used for mordanting purposes.  According to the examples:-(1) Coumarone resin is sulphonated with fuming sulphuric acid, the aqueous solution of the product nearly neutralized with caustic alkali, and freshly-prepared iron or aluminium hydroxide then added; the solution may, if desired, be evaporated to dryness.  (2) Coumarone resin is treated with concentrated or fuming sulphuric acid and calcium carbonate added to neutralize the solution and produce the calcium sulphonate; after filtration, a quantity of aluminium, chromium or iron sulphate equivalent to the lime present is added and the solution again filtered.  The Specification as open to inspection under Sect. 91 (3) (a) includes an example in which coumarone resin is sulphonated with concentrated or fuming sulphuric acid and the aqueous solution is then just neutralized with freshly-precipitated chromium, iron or aluminium hydroxide.  This subject-matter does not appear in the Specification as accepted.ALSO:Coumarone resins are sulphonated with concentrated or fuming sulphuric acid and the product then treated with salts, particularly oxides, hydroxides and carbonates, of iron, chromium or aluminium.  The resulting metal sulphonates are soluble in water.  According to the examples:-(1) Coumarone resin is sulphonated with fuming sulphuric acid, the aqueous solution of the product nearly neutralized with caustic alkali, and freshly-prepared iron or aluminium hydroxide then added; the solution may, if desired, be evaporated to dryness.  (2) Coumarone resin is treated with concentrated or fuming sulphuric acid and calcium carbonate added to neutralize the solution and produce the calcium sulphonate; after filtration, a quantity of aluminium, chromium or iron sulphate equivalent to the lime present is added and the solution again filtered.  (3) Coumarone resin is sulphonated with concentrated or fuming sulphuric acid and the aqueous solution is then just neutralized with freshly-precipitated chromium, iron or aluminium hydroxide.