Conventional photoconductive zinc oxide is converted into bicharge photoconductive zinc oxide by heating with selenium in air at about 300.degree.-600.degree.C. Bicharge zinc oxide is particularly useful as the phtoconductive pigment in photocopy papers.

A method and system for suppressing nitric oxide in waste exhaust streams from combustion zones by delivering small amounts of the nitric oxide in a relatively fast moving waste exhaust stream to a zone having a regenerated salt present on a sorbent material where said nitric oxide is collected by forming a complex with said salt. A heated regenerating gas stream decomposes the complex, and a relatively slow moving stripping stream carries away larger amounts of said nitric oxide to a place in t...

A simple process for preparing metallic oxide coated silica sols and pure metallic oxide sols involves dispersing a metallic chloride and the sol, treating with an anion exchange resin, and recovering the product.

The wetting and dispersion characteristics of titania pigments in plastic materials is improved by treating the pigment with from 0.1-60.0 percent by weight of a polylactone having terminal hydroxy groups, the polylactone being in liquid form or in solution.

A process for separating carbon dioxide from a gaseous recycle system containing ethylene unconverted in the catalytic oxidation of ethylene to ethylene oxide comprises (a) contacting at least a portion of the total recycle stream with an aqueous absorbant for carbon dioxide thereby producing a hydrocarbon rich overhead and a carbon dioxide-fat absorbate, (b) flashing the fat absorbate to produce a hydrocarbon-rich inert vapor stream and a hydrocarbon-lean, carbon dioxide-fat absorbate and (c) s...

In compositions of noble metal(s) dispersed in an inert vehicle which are useful for forming electrodes on dielectric substrates, improved electrode compositions comprising an amount of NiO effective to increase fired conductor adhesion to substrates; since the resultant fired electrodes have increased adhesion to ceramic dielectric substrates, they have special utility in forming surface metallizations in electronic circuits.

Ethylene oxide is recovered from a gaseous mixture obtained by catalytic oxidation of ethylene. An aqueous solvent is used to absorb the gaseous mixture, the enriched solvent is stripped with steam in a stripping region and the lean solvent is supplied in two flows to two separate places of an absorption region, the secondary flow being substantially free from ethylene oxide and being kept at a temperature at least 15.degree. C lower than that of the main flow.

Aluminum oxide fibers of the approximate percent composition by weight: The fibers are produced by dry spinning a solution containing a neutral or basic aluminum salt of a monobasic lower carboxylic acid, a hydrolyzed silicic acid ester or organoalkoxysilane and polyethylene oxide having a degree of polymerization of at least about 2,000. The product is then heat treated at a temperature between about 400.degree. and 1,800.degree.C. Phosphorus, boron and magnesium may also be present in the solu...

Method for the selective recovery from a number of industrial waste material of various components, including zinc, copper, lead and iron, comprising the steps of leaching the waste material with an ammonium chloride solution maintained at an elevated temperature, separating the undissolved iron component from solution, treating the solution with zinc metal to displace the copper and lead from the solution, and cooling the solution to precipitate therefrom the zinc component as zinc oxide.

A catalytic oxide particularly adapted for the preparation of acrylic acid through the catalytic oxidation of acrolein in the vapor phase with molecular oxygen, the catalytic oxide comprising one in which the atomic ratio of the constitutional metal elements is within the following range: V.sub.a Mo.sub.b W.sub.c Cr.sub.d Cu.sub.e Where 14<a.ltoreq.24, b=12, 4.ltoreq.c<20, 1.ltoreq.d<10 and 0.ltoreq.e<12.