Petrolite Corporation

Neil E Thompson

Bernardus A Oude Alink

Derek Redmore

Benjamin T Outlaw

Robert G Asperger

Irwin C Jacobs

Bernardus A Alink

Michael I Naiman

J Irvine Knepper

Ronald P Hutton

Rudolf H Hausler

Reduction of asphaltene precipitation in asphaltenic subterranean reservoirs treated with aqueous solutions of strong acid is achieved by utilizing novel dithiocarbamate compositions to sequester iron.

Dithiocarbamate compounds

Certain dithiocarbamates and method of use for reducing asphaltene

Certain dithiocarbamates are used as reverse demulsifiers, corrosion and scale inhibitors, flocculants, biocides, flotation aids, water clarifiers, interface control agents and antifoaming agents.

Methods for treating hydrocarbon recovery operations and industrial

Compounds containing sulfur and amino groups

Nitrogen-containing dithiocarbamic acids are used as reverse demulsifiers, corrosion and scale inhibitors, flocculants, biocides, flotation aids, water clarifiers, interface control agents and antifoaming agents.

Dithiocarbamates for treating hydrocarbon recovery operations and

Use of nitrogen-containing tridithiocarbamic acid compositions as reverse demulsifiers.

The uses of .alpha.-aminoalkyl sulfur compositions and to the preparation thereof, particularly as corrosion inhibitors. These compositions contain a moiety of the general formula ##STR1## in a linear or cyclic configuration.

.alpha.-aminoalkylsulfur compositions

Use of tridithiocarbamic acid compositions as demulsifiers

A process for inhibiting the corrosion of ferrous metals in aqueous acidic or briny media comprising the step of adding a composition of the formula ##STR1## where R.sub.1 is a hydrocarbon group, O is a pyridine or substituted pyridine, and X is an anion.

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Creve Coeur, MO, United States of America

Neil E Thompson