CITRIC ACID is a source of hydrogen ions (H+) used to reduce the pH of a drilling fluid. Both liquid and powdered. CITRIC ACID provides a layer of hydrogen ions around active clays, reducing their zeta potential and thus reducing their ability to imbibe water. This function translates to fewer solids, less swelling of the solids in the drilling fluid, reduced wellbore swelling, and more efficient solids control equipment function. A secondary benefit of CITRIC ACID is the formation of sodium citrate, a thinner. This helps counteract the flocculating influence of the hydrogen ions on first being introduced to the drilling fluid system.

Application – Pipe cleaning in Aircraft

Application

Uses
CITRIC ACID is primarily used as a pH buffer, a low solids, non-dispersed, low pH drilling fluid

Technical Specification

Citric Acid Anhydrous

Molecular Formula C6H8O7

Molecular Weight 192.13

CAS Number 77-92-9

Product Specifications

Assay (%) 99.5 – 100.5

Water (%) 0.5 max

Identification Passes USP/FCC tests

Residue on Ignition (%) 0.05 max

Oxalate/Oxalic Acid (%) 0.036 max

Sulfate (%) 0.015 max

Arsenic (ppm) 1 max

Heavy Metals (ppm) 5 max / FCC IV Ed.

Lead (ppm) 0.5 max

Readily Carbonizable

Substances Passes USP and FCC tests

Tridodecylamine (ppm) 0.1 max

Color & Clarity Passes USP Tests

Particle Size Distribution

Granular   Max. 1% on U.S. No. 16 sieve Max. 10% through U.S. No. 50 sieve

Fine Granular Max. 1% on U.S. No. 30 sieve Max. 5% through U.S. No. 100 sieve

Powder Max. 5% on U.S. No. 60 sieve Min. 25% through U.S. No. 200 sieve

Bulk Densities Granular 56 (lbs/ft3 ) Fine Granular 54

Packaging 25 Kg : Polyethylene-lined multiwall paper bags: 50 lb (22.7 Kg) Polyethylene-lined multiwall paper bags

Shelf Life and Storage

We recommend that product held for more than 5 years be reevaluated for fitness of use. Anhydrous Citric Acid is slightly hydroscopic and should be stored under conditions of low temperature and low humidity in airtight containers to prevent caking.