41 results about "5-sulfoisophthalic acid" patented technology

This invention relates to methods for the production of various metal salts of 5-sulfoisophthalic acid including those where the metal cation is selected from the group consisting of silver (I), sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, barium, manganese (II), iron (II), cobalt (II), nickel (II), copper (I), copper (II), zinc, yttrium, and cadmium. The methods utilize a solvent system that comprises acetic acid or water or a mixture of both. The invention also encompasses the various metal salts of 5-sulfoisophthalic acid.

There is disclosed a process for making a mono-lithium salt of 5-sulfoisophthalic acid (LiSIPA) having less than 500 ppm sulfate. The process uses a reaction mixture of water, a lithium cation producing compound, and 5-sulfoisophthalic acid. The reaction mixture is heated to reflux, cooled, filtered and washed with acetic acid to obtain a high quality LiSIPA having less than 500 ppm sulfate. Also disclosed is a high quality, non-purified reaction product containing a mono-lithium salt of 5-sulfoisophthalic acid and having less than 500 ppm sulfate.

A method for the purification of 5-sulfoisophthalic acid wherein via the application of an acetic acid wash while said crude cake of 5-sulfoisophthalic acid is filtered.

A sulfopolyester comprising repeat residue units from the reaction product dimethyl-5-sodiosulfoisophthalate, isophthalic acid, 1,4-cyclohexanedimethanol and diethylene glycol, has at least one property selected from: a) an acidity of greater than 0.030 measured as milliequivalents H+ / gram of sulfopolyester; b) a titanium concentration, measured as metal, of less than about 27 ppm, based on the amount of sulfopolyester; or c) an acidity of greater than 0.010 measured as milliequivalents H+ / gram of sulfopolyester, a pH of less than 6.0 and a concentration of a base compound of less than 0.0335 moles / kg of sulfopolyester.A method for making the water-dispersible or water-dissipative sulfopolyester of the present invention is disclosed.Aqueous dispersion having from 0.001 to about 35 weight % of the sulfopolyester of the present invention is also disclosed.The sulfopolyester is useful in making hair spray formulations suitable for pump or aerosol spray applicators.

The claimed invention meets these and other objects by providing a method of preparing a metal salt of a dialkyl ester of 5-sulfoisophthalic acid. Broadly speaking, the method provides for the contacting of a dialkyl ester of 5-sulfoisophthalic acid with a metal cation in a buffered reaction mixture to form the metal salt of the dialkyl ester. The reaction mixture is buffered, at least in part, by the acetate of the metal cation. The method according to invention also encompasses various methods of preparing the dialkyl ester of 5-sulfoisophthalic acid.

The invention relates to a preparation method of a second-order nonlinear optical crystal material. The preparation method comprises the following steps: NiSO4.6H2O, 4,4'-bipyridine and 5-sulfoisophthalic acid monosodium salt are dissolved in water; the materials are stirred for 2 h, packaged in a 25-mL reaction kettle and heated at 120 DEG C for 36 h; the materials are cooled to the room temperature until blue crystals are generated. An MOF (metal-organic framework) compound in the method is different from other second-order nonlinear optical MOF compounds, and is the MOF compound adopting an acentric structure and obtained by synthesizing ligands with a symmetrical structure and metal ions. The second-order nonlinear optical property of the MOF compound is 0.8 times that of urea, and the MOF compound further has phase matching property, fluorescence emission property and magnetic property. The fluorescence emission peak of the compound is at 416 nm, and red shift occurs compared with the ligands. Lone pair electrons are converted into antiferromagnetic coupling at 28 K.