The Dow Chemical Company

Other

Gordon Y Liu

Marylu B Gibbs

Carl P Strange

S Douglas Stain, Jr

Donald R Smith

Loyd D Hutchinson

A waterbike characterized by front-end steering and horizontal stabilizing floatation members, these features providing increased maneuverability at high speeds and stability at low speeds or in a stationary position.

Waterbike

Methyl ketones such as acetone, methyl ethyl ketone, and methyl isobutyl ketone react with vaporized aqueous HF in the vapor phase at about 190.degree. C.-400.degree. C. to make the corresponding 2,2-difluoroalkanes.

Fluorination of methyl ketones

Olefin polymer chlorination products having improved handling properties are prepared by reacting, in a fluidized-bed state, certain free-flowing, high bulk density linear olefin polymer powders with gaseous chlorine. The olefin polymer powder used is characterized by having a flowability measured as angle of repose in the range of from about 24.degree. to about 28.degree., a bulk density in the range of from about 25 to about 35 pounds/cubic foot and a surface area in the range of from about 2 to about 4 square meters/gram. The individual particles of the olefin polymer particle are characterized by having particle sizes predominantly in the range of from about 300 to about 600 microns, and porosity sufficient to provide an average free volume within individual particles in the range of from about 20 to about 45 volume percent based on total particle volume.

Olefin polymer chlorination products having improved handling properties

Polysaccharide ethers are prepared in a novel continuous process in which a slurry of a polysaccharide, an alkali metal hydroxide, and an etherifying agent, with or without an inert diluent, are mixed in the substantial absence of molecular or free oxygen and fed through a sinuous tubular reactor under pressure, so that the etherification reaction is continuous. The apparatus for preparing the reaction mixture is also novel.

Method of preparing polysaccharide ethers and apparatus

Ultra high molecular weight, linear .alpha.-olefin polymers are produced without reactor fouling by polymerizing an .alpha.-olefin in the presence of Ziegler catalyst dispersed in an inert diluent and an amount of an inert gas not in excess of that which will dissolve in the inert liquid diluent.

Growing community of inventors

Baton Rouge, LA, United States of America

Gordon Y Liu