Olin Corporation

Atlantic Richfield Company

United States Gypsum Company

Lyondell Chemical Technology, L.p.

Harold V Larson

Hyman D Gillman

Ha H Nguyen

Anthony S Dearth

Morris E Clark

Methods for preparing molybdenum-based catalyst for epoxidation reactions using MPG sourced from a propylene oxide/styrene monomer (POSM) production process are described. Streams exiting from the POSM reactor are combined and separated to isolate an aqueous-based, MPG-containing purge stream from other recoverable byproducts of the POSM process. This MPG-containing purge stream is then used as is in the catalyst preparation of molybdenum-based catalyst for epoxidation. Alternatively, the MPG-containing purge stream can undergo additional purification treatments before being utilized in the catalyst preparation.

Use of monopropylene glycol from purge streams in epoxidation catalyst preparation

Process for improving the quality of propylene oxide contaminated with minute quantities of high molecular weight poly(propylene oxide) by contacting liquid propylene oxide with certain solid adsorbents, such as activated carbon and attapulgite, thereby obtaining a substantially pure oxide product essentially free of high molecular weight poly(propylene oxide) suitable for conversion of polyether polyols capable of producing high resilient flexible polyurethane foams exhibiting high rise and substantially free of blow hole formation.

Purification of propylene oxide

Disclosed is a method for treating substantially homogeneous monocalcium phosphate (MCP) solutions that contain undesirable amounts of radium which comprises centrifuging these MCP solutions sufficiently to separate at least a portion of the radium from the solution. Such treated MCP solutions may then be reacted with sulfuric acid to simultaneously produce a phosphoric acid solution and a calcium sulfate precipitate such as gypsum having low levels of radium content.

Process for removing radium from monocalcium phosphate solutions by

Disclosed is a process for producing a calcium sulfate product containing low amounts of radium comprising the steps of:

Process for producing a calcium sulfate product containing low amounts

An improved process is described for preparing defluorinated phosphate rock (DPR) granules useful as animal feed from fluorine-containing phosphate rock.

Process for producing defluorinated phosphate rock granules

An improved process is described for preparing defluorinated phosphate rock from fluorine-containing phosphate rock which contains acid insoluble impurities in excess of about 6 percent by weight. The improvement is particularly useful in the fluidized bed technique for preparing defluorinated phosphate rock wherein fluorine-containing phosphate rock, a sodium compound such as sodium carbonate, phosphoric acid and water are admixed to form granules. The resulting granules are dried and heated in a fluidized bed calciner at a temperature within the range of from about 980.degree. to about 1,350.degree. C to evolve sufficient fluorine to produce defluorinated phosphate rock graules having less than 1 part of fluorine per 100 parts of phosphorus by weight. The resulting defluorinated granules are colled and stored for use as an animal feed which contains at least 18 percent by weight of phosphorus. The improvement of this invention comprises admixing a lime compound with the phosphoric acid, prior to mixing with the other ingredients, to form a lime-acid slurry having a CaO to P.sub.2 O.sub.5 weight ratio in the range from about 0.01:1 to about 0.20:1.

Growing community of inventors

Houston, TX, United States of America

Harold V Larson