Monsanto Company

Other

John H Wagenknecht

James P Coleman

Gary V Johnson

Eduardo A Casanova

Dean G Laurin

Patrick John Kinlen

Dennis J Kalota

John M Pope

A liquid composition useful for selective dissolution of soft metal is disclosed. The composition comprises an organic nitrocompound and a carboxylic acid. The organic nitrocompound, upon exposure to the soft metal, oxidizes the soft metal to form a first soft metal salt. The carboxylic acid, upon exposure to the soft metal salt, react with the first soft metal salt to form a second soft metal salt that is soluble in the composition. Related methods are also disclosed.

Compositions for dissolution of soft metals

A method for selectively dissolving a soft metal from a substrate of a harder metal by application thereto of an organic nitrocompound and a carboxylic acid. The organic nitrocompound, upon exposure to the soft metal, oxidizes the soft metal to form a first soft metal salt. The carboxylic acid, upon exposure to the soft metal salt, reacts with the first soft metal salt to form a second soft metal salt that is soluble in the composition.

Method for dissolution of soft metals from a substrate of a harder metal

1,2,3,4-Butanetetracarboxylic acid is prepared by electrohydrodimerization of dialkyl maleates in alkanol to produce tetraalkyl butanetetracarboxylates, followed by hydrolysis of the resultant tetraalkyl butanetetracarboxylates to obtain the butanetetracarboxylic acid product.

Process for preparing butanetetracarboxylic acid

The present invention is directed to a process for preparing tetraalkyl butanetetracarboxylates by electrolytic hydrodimerization of dialkyl maleates in alkanols.

Process for preparing tetraalkyl butanetetracarboxylates

A sensor which may be immersed in a fluid to measure the pH and the ORP potential of the fluid is taught. The sensor has three solid state electrodes, a pH sensing electrode, a reference electrode and an ORP potential sensing electrode, which extend from a fluid-tight enclosure. The enclosure further contains a display means for indicating the pH measurement and the ORP potential measurement.

Electronic pH and ORP indicator

A non-transparent, fluid product dispenser comprising a structurally rigid outer container and a flexible inner container provided with means for visually indicating the amount of product remaining in the dispenser comprising a mechanical actuator attached between the end of the liner container and an actuatable indicator on the outer container. Operating in proportion to the travel of the end of the inner container, the actuator is connected to at least one pull tab attached to an indicator window in the outer container.

Fluid product dispenser with volume indicator

Hydroxyibuprofen is produced in good yield by reduction of p-isobutylacetophenone at the cathode in the presence of carbon dioxide. Hydroxyibuprofen is readily hydrogenolyzed to ibuprofen. Electrochemical carboxylation of other selected aryl methyl ketones is also effected.

Electrochemical carboxylation of p-isobutylacetophenone and other aryl

Hydroxyibuprofen is produced in good yield by reduction of p-isobutylacetophenone at the cathode in the presence of carbon dioxide. Hydroxyibuprofen is readily hydrogenolyzed to ibuprofen.

Electrochemical carboxylation of p-isobutylacetophenone

Electrolytic reduction at the cathode of aromatic hydrocarbons in an aqueous emulsive electrolysis medium in an undivided electrolytic cell yields dihydroaromatic hydrocarbons.

Preparation of dihydroaromatic hydrocarbons

This invention relates to an electrolytic flow-cell apparatus and a process for effecting sequential electrochemical reactions of redoxidative compounds at a porous working electrode. The porous working electrode has a first face and a second and opposite face, at which faces the sequential reactions are effected.

Electrolytic flow-cell apparatus and process for effecting sequential

Electrolytic reductive coupling of hydroxybenzaldehydes in an aqueous alkaline electrolysis medium in an undivided electrolytic cell yields 1,2-bis(hydroxyphenyl)ethane-1,2-diols.

Electrolytic reductive coupling of hydroxybenzaldehydes

A method and apparatus to electrochemically purify gallium is disclosed where a platinum anode is inserted into an electrolytic cell which contains the unpurified gallium as an anode and the purified gallium as a cathode, the platinum anode serving to reduce the gallium ion level in the electrolyte addition.

Growing community of inventors

Cedar Hill, MO, United States of America

John H Wagenknecht