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Hydroxycarboxylic Acids and Salts

a technology applied in the field of hydroxycarboxylic acids and salts, can solve the problems of limited condensed admixtures, including but not limited to, other chemical processes, and the lik

Inactive Publication Date: 2009-10-08
UNIVERSITY OF MONTANA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0018]This invention describes novel chemical oxidation methods for polyols to prepare hydroxycarboxylic acids, as single oxidation products or in mixtures of oxidation products, applicable to commercial scale production. The invention also describes conversion of the oxidation products to mixtures of salt products or to individual salt products. The oxidation products can be used as corrosion inhibiting materials for a variety of corrosio

Problems solved by technology

Concrete admixtures include but are limited to roles as high-performance water reducers, improve concrete strength, and improve slump contraction (Wang, 2007).

Method used

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  • Hydroxycarboxylic Acids and Salts
  • Hydroxycarboxylic Acids and Salts

Examples

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Comparison scheme
Effect test

example 1

Corrosion Test Methods

[0027]Salt products prepared by the nitric acid oxidation methods and work up procedures described in this invention were evaluated for their corrosion inhibiting properties according to standard testing methods. Corrosion tests were performed according to the National Association of Corrosion Engineers (NACE) Standard TM0169-95 modified by the Pacific Northwest Snowfighters (PNS) (NACE TM0169-95).

[0028]The test procedure was modified to use 30 mL of a 3% solution of inhibitor per square inch of total coupon surface area. Stamped and numbered steel TSI coupons which met the ASTM F436 Type 1 requirement with a Rockwell hardness of C 38-45 were used for each corrosion test. Approximate coupon dimensions are 1.37 in. outer diameter,0.60 in. inner diameter, and 0.10 in. thickness with a density of 7.85 grams per cubic centimeter. Coupons were placed in a sealed container on a rock tumbler with a non-abrasive cleanser for 30 minutes to remove surface grease and impu...

example 2

Samples Prepared as Concrete Admixtures

[0037]The samples prepared as concrete admixtures were of the type listed in Table 2 Sample I being oxidation mixtures as described with no glucarate removed, Sample II being oxidation mixtures as described with some glucarate removed, and Sample III being a single admixture substance from the oxidation, i.e., monopotassium D-glucarate.[0038]I nitric acid oxidized 95-99% liquid dextrose[0039]II nitric acid oxidized 95-99% liquid less D-glucarate[0040]III monopotassium D-glucarate

[0041]A pH greater than 9 was established for Samples I-II by addition of sodium hydroxide, whereas the pH of the Sample III solution was established as greater than 9 by addition of potassium hydroxide.

A.—Admixture Sample Preparation

[0042]Numerous samples were prepared from the dextrose oxidation product to be tested as potential concrete admixtures. Each sample was varied by control of reaction conditions, work-up procedure and product analysis by ion chromatography f...

example 3

General Methods

[0048]Solutions were concentrated in vacuo (15-25 mbar) using a rotary evaporator and water bath at 50° C. pH measurements were made with a Thermo Orion 310 pH meter (Thermo Fisher Scientific, Inc., Waltham, Mass., USA) which was calibrated prior to use. Oxidations were carried out in Mettler Toledo LabMax reactor, designed to operate as a computer controlled closed-system reactor. The Labmax was fitted with a top-loading balance, a liquid feed pump, an oxygen Sierra flow valve, a mechanically driven stirring rod, a thermometer, a 2 liter thermal jacketed flask, an FTS recirculating chiller, a pressure manifold fitted with pressure relief valves and pressure gauge, and a personal computer with CamileTG v1.2 software. The software installed allows the operator to program experiments based on specific parameters and conditions. Oxidation procedures are readily changed as needed as illustrated in Examples 9-13.

[0049]Examples of, but not limited to, preparation of polyol ...

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Abstract

Compositions which inhibit corrosion and alter the physical properties of concrete (admixtures) are prepared from salt mixtures of hydroxycarboxylic acids, carboxylic acids, and nitric acid. The salt mixtures are prepared by neutralizing acid product mixtures from the oxidation of polyols using nitric acid and oxygen as the oxidizing agents. Nitric acid is removed from the hydroxycarboxylic acids by evaporation and diffusion dialysis.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation-in-part application of co-pending application Ser. No. 11 / 890,760, filed Aug. 6, 2007, which claims the benefits of U.S. Provisional Patent Application No. 60 / 836,329, filed Aug. 7, 2006, the disclosure of which is hereby incorporated by reference in its entirety including all figures, tables and drawings.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]The invention was made with Government support under Grant No. 2003-364463-13003 and 2005-364463-15561 awarded by the USDA-CSRESS. The Government has certain rights in the invention.REFERENCE TO SEQUENCE LISTING, A TABLE, OR A COMPUTER PROGRAM LISTING COMPACT DISC APPENDIX[0003]Not applicableBACKGROUND OF THE INVENTION[0004]This invention describes a method for synthesizing hydroxycarboxylic acid salts from polyols using nitric acid and oxygen as the oxidizing agents and applying the hydroxycarboxylic acid salts for uses that include c...

Claims

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Application Information

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IPC IPC(8): C09K3/18C08B37/02
CPCC04B24/06C09K3/185C23F11/126C04B2103/61C07H3/02C07H3/04C07H3/06C08B37/00C07C51/316C07C51/412C07C59/105
Inventor KIELY, DONALD E.HASH, KIRK R.KRAMER-PRESTA, KYLIESMITH, TYLER N.
Owner UNIVERSITY OF MONTANA
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