Abstract: The present invention relates to purification of an MTBE process stream by contact in the liquid phase with a large pore zeolite such as 13X or Zeolite Y.

Abstract: Large crystals of titanium silicalite or intergrowths of intergrown smaller crystals, having a mean particle size greater than 2 ?m, have been found catalytically effective at commercially reasonable rates for the epoxidation of olefins in the presence of hydrogen peroxide. Crystals synthesized with a silica source having a low sodium content exhibit high levels of production and selectivity. The crystals have a low attrition rate and are easily filterable from a product stream.

Abstract: Catalysts useful for oxidation reactions are disclosed. The catalysts comprise a polymer-encapsulated titanium zeolite. The catalysts are easy to prepare and use, they are easy to recover and reuse, and they provide good conversions in a variety of important oxidation processes. The invention includes a process which comprises oxidizing an organic compound in the presence of hydrogen peroxide and a polymer-encapsulated titanium zeolite. In one example, the organic compound is propylene and the reaction product is propylene oxide.

Abstract: Phenol is formed by reaction of oxidant and benzene over a solid catalyst such as Pd on TS-1, the reaction being carried out in carbon dioxide solvent at conditions effective to provide a dense phase reaction mixture.

Abstract: An acrylic emulsion is disclosed. The emulsion comprises from about 30% to about 90% by weight of water, about 10% to about 70% by weight of an acrylic polymer, about 0.2% to about 10% by weight of a emulsifying agent, and up to 20% by weight of an organic solvent. The acrylic polymer contains from about 20% to about 80% by weight of recurring units of t-butyl acrylate or methacrylate. Latex coatings formulated from the acrylic emulsion show significantly improved resistance to moisture and corrosion.

Abstract: A process for absorbing propylene from a gaseous propylene oxide process purge stream wherein propane liquid is used to absorb the propylene.

Abstract: N-vinyl pyrrolidone is produced by dehydration of N-hydroxyethyl pyrrolidone in the presence of an amorphous mixed oxide catalyst such as an amorphous Ca/Zn oxide catalyst.

Abstract: A UV-curable composition is disclosed. The composition comprises a crosslinking agent, a hydroxyalkyl acrylate or methacrylate, and an acrylic polyol. The crosslinking agent is selected from the group consisting of multifunctional isocyanates, melamines, and silanes. The acrylic polyol comprises recurring units of an allylic alcohol. The composition can be irradiated to be solidified and then fully cured by the urethane, melamine, or silane reactions. Alternatively, the composition can be cured by the urethane, melamine, or silane reactions, and then fully cured by radiation. The invention provides low VOC but high performance coatings. More importantly, the invention provides a UV-curable system without the need for acrylated oligomers.

Abstract: Propylene oxide is formed by reaction of propylene with molecular oxygen in a high boiling solvent containing slurried solid catalyst, the light components are flashed and the remaining liquid containing slurried catalyst is recycled.

Abstract: Used titanium-containing silicon oxide catalysts are regenerated by heating the used catalyst at a temperature of at least 400° C. in the presence of a oxygen-containing gas stream, followed by impregnation with a titanium source, and then calcining the impregnated catalyst to form a reactivated catalyst.

Abstract: Oxidation products are recovered from a mixture of the products in a dense phase or supercritical solvent by a liquid—liquid extraction at dense phase conditions.

Abstract: A gypsum composition suitable for use in the manufacture of gypsum products is provided. The gypsum composition includes gypsum, water, and a solid dispersant comprising a supported acrylic/polyether comb-branched copolymer. A method of making a gypsum composition is also provided. The method includes mixing together, in any combination, gypsum, water, and a solid dispersant comprising a supported acrylic/polyether comb-branched copolymer.

Abstract: Propylene oxide is formed in a two step reaction wherein in a first step oxygen and hydrogen are reacted in the absence of propylene to form hydrogen peroxide and in a second step propylene is reacted with the formed hydrogen peroxide to form propylene oxide, the same solid noble metal on TS-1 catalyst being used to catalyze the reaction in each step.

Abstract: A continuous process for making a comb-branched copolymer of an acrylic monomer and a polyether macromonomer is disclosed. The process is performed by continuously feeding a reaction zone with a monomer stream that contains an acrylic acid and a polyether macromonomer, and an initiator stream. The comb-branched copolymer made thereby performs better as water reducing agent in cement compared to that made by a batch process.

Abstract: A new method for preparing lithium phosphate catalysts is disclosed. The method comprises precipitating a lithium phosphate from a mixture comprising a first aqueous solution which contains lithium and sodium ions and a second aqueous solution which contains phosphate and borate ions. The resultant lithium phosphate catalyst has increased activity and selectivity in the isomerization of an alkylene oxide to the corresponding allylic alcohol.

Abstract: Allyl carbamates are disclosed. The allyl carbamates are prepared by reacting an isocyanate with an allylic alcohol or alkoxylated allylic alcohol. Suitable isocyanates are selected from hexamethylene diisocyanate (HDI), HDI biuret, dimer, HDI trimer, HDI allophanate, isophorone diisocyanate (IPDI), IPDI trimer, IPDI allophanate, bis(isocyanatocyclohexyl)methane, and mixtures thereof. The allyl carbamates have at least two allyl functional groups per molecule. UV-curable and air-drying coatings formulated from the allyl carbamates show excellent chemical resistance and physical properties.

Abstract: The invention is a method to purify tertiary butyl alcohol by contact with at least two solid adsorbents comprising aluminum oxide and a large pore zeolite such as zeolite X. The purification method successfully improves product quality and reduces the amount of impurities in the tertiary butyl alcohol.

Abstract: A method for making a low-yellowing acrylic polyol is disclosed. The acrylic polyol has an APHA color increase less than 100% when it is mixed with 1.5 wt % of an UV light stabilizer. The method comprises free radically copolymerizing an allylic alcohol, an alkyl acrylate or methacrylate, and optionally a vinyl comonomer selected from the group consisting of vinyl aromatic, vinyl ethers, and vinyl esters in an initiator concentration less than or equal to 0.8 wt % of the total amount of monomers.

Abstract: The invention is a liquid-phase process for epoxidizing olefins with hydrogen peroxide in the presence of a non-zeolitic, supported niobium oxide catalyst comprising niobium oxide and a support. The process exhibits good productivity and selectivity for olefin epoxidation with hydrogen peroxide.

Abstract: A propylene oxide/styrene monomer aqueous purge stream is contacted with a catalyst at conditions effective to decompose peroxides contained therein, and oxygen formed by the decomposition swept from the decomposition with a nitrogen vapor stream from ethylbenzene oxidation.