Ethyl Corporation

Albemarle Corporation

Lloyd T Crasto

Isaac L Smith

Joseph A Bossier, Iii

Douglas M Richards

Robert H Jones, Jr

George A Daniels

John C Klock

Joseph B Tedder, Jr

Robert P Gallant

The process of preparing higher aluminum alkyls by olefin chain growth on alkyl aluminum is improved by using on-line flow-through calorimetry to determine the aluminum concentration of a process stream, such as the aluminum alkyl feed stream, by reacting a sample portion of the process stream with a molar excess of alcohol and measuring the change in temperature. The aluminum concentration of the stream can then be adjusted as required to maintain it within a selected range.

Control of ethylene on alkyl aluminum chain growth processes using

A continuous method for preparing silane and a co-product by reacting a metal hydride such as NaAlH.sub.4 with a silicon halide such as SiF.sub.4. The method involves a reactor loop comprising a primary reactor, a secondary reactor and a separation zone. Most of the metal hydride is reacted in the first reactor to which it is added in a substantially constant rate. The remainder of the hydride is reacted in the secondary reactor, in which all or substantially all of the silicon halide is added. The rate of silicon halide addition is governed by feed back from the reaction in the secondary reactor, (.rarw.T so that stoichiometric or substantially stoichiometric operation is achieved. This conserves resources, provides improved co-product and reduces costs.

Process for preparation of silane

A process for the recovery of lead from lead by-product materials, including lead-containing slag and other lead-containing waste materials, in a rotary smelting furance using an active alkali metal mixture by-product as a reductant and flux.

Lead recovery and waste disposal process

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Baton Rouge, LA, United States of America

Lloyd T Crasto