Sugar ester peracid on site generator and formulator

Patent metadata

Field	Value
Publication number	US-9883672-B2
Application number	US-201615337400-A
Country	US
Kind code	B2
Filing date	Oct 28, 2016
Priority date	Dec 29, 2010
Publication date	Feb 6, 2018
Grant date	Feb 6, 2018

Abstract

Methods and systems for on-site generation of peracid chemistry, namely peroxycarboxylic acids and peroxycarboxylic acid forming compositions, are disclosed. In particular, an adjustable biocide formulator or generator system is designed for on-site generation of peroxycarboxylic acids and peroxycarboxylic acid forming compositions from sugar esters. Methods of using the in situ generated peroxycarboxylic acids and peroxycarboxylic acid forming compositions are also disclosed.

First claim

The invention claimed is:

1. An adjustable biocide formulator or generator system for on-site peroxycarboxylic acid forming composition generation comprising:
an apparatus comprising at least one reaction vessel, a series of feed pumps and an outlet for dosing a peroxycarboxylic acid forming composition from said reaction vessel;
wherein said feed pumps are in fluid connection with said reaction vessel and supply reagents to produce said peroxycarboxylic acid forming composition in said reaction vessel;
wherein said reagents comprise an ester of a polyhydric alcohol and a C1 to C18 carboxylic acid, a source of alkalinity, an acid or acidic aqueous solution, and an oxidizing agent;
wherein said reaction vessel is in fluid connection with said outlet to dispense said peroxycarboxylic acid forming composition; and
wherein said peroxycarboxylic acid forming composition is an individual or mixed peroxycarboxylic acid forming composition according to a user- or system-inputted selection.

2. The system according to claim 1 , wherein the source of alkalinity is sodium hydroxide, and wherein said sodium hydroxide is provided to said reaction vessel prior to the addition of said ester in a solution that is less than about 20 wt-% sodium hydroxide on an actives basis.

3. The system according to claim 1 , further comprising at least one measurement device, wherein said measurement device measures one or more reaction kinetics or system operations for said peroxycarboxylic acid forming composition generation selected from the group consisting of fluorescence, weight, flow, capacitive level, pH, oxidation reduction potential, pressure, temperature and combinations thereof.

4. The system according to claim 1 , wherein said ester and other reagents are fed sequentially to said reaction vessel to produce a single peroxycarboxylic acid forming composition, and wherein said ester is selected from the group consisting of monooctanoic glyceride, dioctanoic glyceride, trioctaonoic glyceride, sorbitan monooctanoate, sorbitan dioctanoate, sorbitan trioctanoate, laurate sucroside and mixtures and derivatives thereof.

5. The system according to claim 1 , wherein more than one ester is added with said other reagents to a single reaction vessel or separate reaction vessels sequentially or in parallel to produce a mixed peroxycarboxylic acid forming composition, wherein said ester is selected from the group consisting of monooctanoic glyceride, dioctanoic glyceride, trioctaonoic glyceride, sorbitan monooctanoate, sorbitan dioctanoate, sorbitan trioctanoate, laurate sucroside and mixtures and derivatives thereof.

6. The system according to claim 1 , wherein said apparatus further comprises a reservoir in fluid connection with said reaction vessel outlet to mix or store said peroxycarboxylic acid forming compositions from said reaction vessel, and/or an additional feed pump providing the acid or acidic aqueous solution in fluid communication with said reaction vessel or said reservoir, wherein said acid or acidic aqueous solution dilutes said peroxycarboxylic acid forming composition to form a peroxycarboxylic acid having a pH of about 1.0 to about 8.0, and/or at least one component selected from the group consisting of additional mixers, circulation pumps, holding vessels, reagent delivery sensors or combinations of the same.

7. The system according to claim 1 , further comprising a control software for operating said apparatus to generate a user- or system-inputted peroxycarboxylic acid forming composition and desired volume of said peroxycarboxylic acid forming composition for on-site generation, wherein said control software determines the timing of feeding said raw materials to said reaction vessel, mixing and reaction time required for production of said user- or system-inputted peroxycarboxylic acid forming composition and desired volume.

8. The system according to claim 1 , wherein said ester is traicetin or sorbitan octanoate, wherein said oxidizing agent comprises a hydrogen peroxide donor, and wherein said the source of alkalinity is selected from the group consisting of an alkaline metal hydroxide, an alkaline earth metal hydroxide, an alkali metal silicate, an alkali metal carbonate, borates and mixtures thereof.

9. The system according to claim 1 , further comprising a data output means for sharing information related to said peroxycarboxylic acid forming composition formulation, peroxycarboxylic acid forming composition consumption or usage, additional peroxycarboxylic acid forming composition production-related data or combinations of the same.

10. A method for on-site peroxycarboxylic acid forming composition generation or peroxycarboxylic acid generation comprising:
inputting a user- or system-controlled peroxycarboxylic acid forming composition or peroxycarboxylic acid formulation into a control software for an adjustable biocide formulator or generator system, wherein said input formulation selects an individual or mixed peroxycarboxylic acid forming composition or peroxycarboxylic acid and corresponding volume or mass for on-site generation; and
mixing one or more sugar esters of a polyhydric alcohol and a C1 to C18 carboxylic acid, a source of alkalinity, an acid or acidic aqueous solution, and an oxidizing agent at alkaline pH in the adjustable biocide formulator or generator system of claim 1 at a pH above at least 12.

11. The method according to claim 10 , wherein the source of alkalinity is sodium hydroxide, and wherein said sodium hydroxide is provided to said reaction vessel prior to the addition of said ester and said acid or acidic aqueous solution in a solution that is less than about 20 wt-% sodium hydroxide on an actives basis.

12. The method according to claim 11 , wherein said sodium hydroxide is diluted with water to the target concentration of less than about 20 wt-% within the system and prior to the addition of said ester.

13. The method according to claim 10 , wherein said input is a user or a system selecting a peroxycarboxylic acid or peroxycarboxylic acid forming composition, wherein said system is selected from the group consisting of a CIP process, bottle washer, aseptic filler, vegetable wash or rinse sink, 3 rd sink sanitizing sink, textile bleaching process and combinations thereof.

14. The method according to claim 13 , wherein said user or a system input further selects a single or multiple reaction vessel mode for peroxycarboxylic acid and/or mixed peroxycarboxylic acid or peroxycarboxylic acid forming composition generation.

15. The method according to claim 14 further comprising timing the addition of said esters in parallel or sequentially for reaction in a single reaction vessel or separate reaction vessels, and combining peroxycarboxylic acid forming compositions from separate reaction vessels into an additional reaction vessel or a reservoir.

16. The method according to claim 10 , further comprising measuring the extent of said ester perhydrolysis reaction using one or more measurement devices, wherein said measurement device measures one or more reaction kinetics or system operations for said peroxycarboxylic acid generation selected from the group consisting of fluorescence, weight, flow, capacitive level, pH, oxidation reduction potential, pressure, temperature and combinations thereof.

17. The method according to claim 16 , wherein said measurement devices determine when to dilute said peroxycarboxylic acid forming composition with the acid or aqueous acidic solution to form said peroxycarboxylic acid.

18. The method according to claim

Assignees

• Ecolab Usa Inc

Inventors

• Kraus Paul R
• Mehus Richard J
• Sanville Katherine M
• Rustad Thomas C

Classifications

• A61L2/24

  Apparatus using programmed or automatic operation · CPC title

• B01J2219/00159

  controlling multiple zones along the direction of flow, e.g. pre-heating and after-cooling · CPC title

• B01J4/001

  Feed or outlet devices as such, e.g. feeding tubes · CPC title

• B01J14/00

  Chemical processes in general for reacting liquids with liquids; Apparatus specially adapted therefor (B01J8/00, B01J19/08 take precedence) · CPC title

• A01N37/02

  Saturated carboxylic acids or thio analogues thereof; Derivatives thereof · CPC title