Abstract: In the co-production of propylene oxide and styrene monomer, there is produced a sodium-containing heavy residue stream previously suitable only as a low grade fuel. In accordance with the invention, the heavy residue stream is mixed with a hydrocarbon and an aqueous acid, and the resulting mixture is separated into an aqueous sodium salt-containing slurry phase and an organic phase reduced in sodium.

Abstract: This invention relates to processes for removing particles such as catalyst fines from hydrocarbon streams, such as a wax dried from a Fischer Tropsch reaction using centrifugation in combination with a treatment with an aqueous solution preferably containing an acid, or with an acid. According to an aspect of the invention, catalyst particles are removed from a wax derived from a Fischer Tropsch by pre-treating the hydrocarbon stream with an aqueous solution and forming a mixture comprising the hydrocarbon stream and 5-25% v/v organic acid solution; and introducing the mixture to a centrifuge and separating, from the mixture, a hydrocarbon stream, an aqueous solution and particles. The process may be a continuous and/or a batch process.

Abstract: According to the present invention, there is provided a process for inhibiting the polymerization of an aromatic vinyl compound which is capable of efficiently inhibiting the polymerization of an aromatic vinyl compound not only in an initial stage but also over a long term in the stage of producing, purifying, storing or transporting the aromatic vinyl compound, and which is excellent in handling. The present invention relates to a process for inhibiting the polymerization of an aromatic vinyl compound which requires the step of adding a 2-nitrophenol compound in combination with a sulfonic acid compound to the aromatic vinyl monomer during the stage of producing, purifying, storing or transporting the aromatic vinyl compound.

Abstract: Process for the continuous drying of a hydrocarbon stream at a temperature being effective in drying the stream with an ionic liquid drying agent comprising a salt of sulphuric acid being in liquid or melted form at the drying temperature.

Abstract: Process for the continuous drying of a hydrocarbon stream at a temperature being effective in drying the stream with an ionic liquid drying agent comprising a salt of sulphuric acid being in liquid or melted form at the drying temperature.

Abstract: The present invention relates to a method of purifying 1,3,5-triisopropylbenzene that comprises combining inpure 1,3,5-triisopropylbenzene with a sulfonating agent to form a reaction mixture, mixing the reaction mixture at a temperature in the range of about 0° C. to about 50° C., and collecting the purified 1,3,5-triisopropylbenzene.

Abstract: The present invention relates to a method of purifying 1,3,5-triisopropylbenzene that comprises combining impure 1,3,5-triisopropylbenzene with a sulfonating agent to form a reaction mixture, mixing the reaction mixture at a temperature at about 20° C. or above, and collecting the purified 1,3,5-triisopropylbenzene.

Abstract: A method for recovering titanium and vanadium compounds, such as alkoxides, from a liquid hydrocarbon mixture by hydrolyzing the mixture with a base or acid wash having a sufficiently different density so that two liquid phases form, and separating the two liquid phases.

Abstract: The waste organics containing caustic stream from a propylene oxide/styrene monomer process is preferably first concentrated by distillation and then contacted with strong acid such as sulfuric acid and an organic solvent, the admixture is phase separated and an aqueous sodium containing phase reduced in organics is separated from an organic solvent phase reduced in sodium.

Abstract: The buildup of heavy polynuclear aromatic compounds in a hydrocracking system is controlled by contacting at least a portion of the recycle oil to the hydrocracker with a porous solid that has been treated with an acid. The porous solid serves as a support for the acid, thereby presenting the recycle oil with a high surface area for contact with the acid, which extracts the heavy polynuclear aromatic compounds from the recycle oil. A preferred acid-treated support is an amorphous silica that has been impregnated with sulfuric acid.

Abstract: A process is provided for the purification of d-Limonene, particularly to remove odorous impurities. The process includes the step of mixing d-Limonene with an oxidizer and separating the oxidizer from the d-Limonene. In preferred embodiments, the d-Limonene is then mixed with an acid and separated. The preferred process also includes a wash water step. The oxidizer and acid are preferably provided in aqueous solutions. The process removes the odorous impurities without the formation of an off-color in the d-Limonene.

Abstract: A method for the preparation of isobutylene substantially free from tertiary butyl formate and peroxides from a tertiary butyl alcohol feedstock contaminated with tertiary butyl formate and peroxides wherein the feedstock is continuously brought into contact with a bed of a catalyst consisting essentially of sulfuric acid impregnated alumina under reaction conditions including a temperature of about 150.degree. to about 400.degree. C. and a pressure of about 0 to about 3000 psig. at the rate of about 0.5 to about 10 g of feedstock per hour per cc of catalyst, to form a reaction product substantially completely free from tertiary butyl formate and peroxides.

Abstract: A method for purifying a cumene recycle stream by removing 2-phenyl-2-propanol and cumene hydroperoxide before the cumene is distilled and recycled to the peroxidation reactor which comprises reacting the recycle cumene in the presence of an acid treated montmorillonite clay of the formula:M.sub.x/n.sup.n+.sub..y H.sub.2 O(Al.sub.4-x Mg.sub.x) (Si.sub.8)O.sub.20 (OH).sub.4or in the presence of a catalyst comprising phosphoric acid on silica.

Abstract: An improved process for the removal of by-product amounts of undesirable aromatic hydrocarbon compounds from a mixture comprised of such compounds and predominantly tetramethyltetrahydronaphthalene is provided. In accordance with the process the mixture is contacted with a concentrated sulfuric acid solution whereby the undesirable aromatic hydrocarbons are dissolved therein and the acid phase containing said hydrocarbons is removed from the mixture.

Abstract: A process for recovering 3-methyl-1-butene from a hydrocarbon stream by treating the stream with sulfuric acid to remove compounds which form azeotropes with 3-methyl-1-butene and separating the remaining stream.