Browse Prior Art Database

Boron removal from flowback and produced water via nano-filtration upon formation of a borate sugar complex

IP.com Disclosure Number: IPCOM000246214D
Publication Date: 2016-May-17
Document File: 1 page(s) / 5K

Publishing Venue

The IP.com Prior Art Database

Abstract

Boron in produced and flowback water can prevent or complicate reuse in future hydraulic fracturing jobs by over-crosslinking borate-guar based fluids. Boron exists in water as borate, a common cross-linker used to build viscosity in frac fluids. This system details the novel process of adding glucosamine to boron laden waters followed by removal via nano-filtration to allow for reuse of the flowback/produced water.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 69% of the total text.

Page 01 of 1

Title: Boron removal from flowback and produced water via nano-filtration upon formation of a borate sugar complex

Abstract: Boron in produced and flowback water can prevent or complicate reuse in future hydraulic fracturing jobs by over-crosslinking borate-guar based fluids. Boron exists in water as borate, a common cross-linker used to build viscosity in frac fluids. This system details the novel process of adding glucosamine to boron laden waters followed by removal via nano-filtration to allow for reuse of the flowback/produced water.

Description: Boron in produced and flowback water can prevent or complicate reuse in future hydraulic fracturing jobs by over-crosslinking borate-guar based fluids. Boron exists in water as borate, a common cross-linker used to build viscosity in frac fluids. Guar is a polysaccharide that forms chemical bonds to the borate through hydroxyl groups on the polymer. Borate will form this bond with other diols (molecules containing two hydroxyl groups e.g. sugars) provided the pH is sufficient and the diols are oriented correctly. Ion-exchange resins specific for boron removal utilize glucosamine (sugar) to form this chemical bond and remove it from solution. Nano-filtration works very well at removing divalent (Ca, Mg...) ions and larger molecules including sugars without the excessive waste and pressure requirements required with reverse osmosis. However, borate is too small to be removed by nano-filtration alone and while it can...