Polycarboxylated β-Amino Alcohol Polymers for Iron Sulfide Dissolution
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Solution Overview
Problem
The deposition of insoluble inorganic salts, particularly iron sulfide, in oil and gas equipment leads to fouling and blockages, which are difficult to remove with conventional cleaners, causing operational inefficiencies and equipment failure.
Innovation Solution
Compositions comprising polycarboxylated β-amino alcohol polymers are used to dissolve inorganic salt deposits, such as iron sulfide, in aqueous media, offering effective removal and prevention of fouling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional cleaners are used to remove iron sulfide deposits, then organic deposition may be removed, but inorganic deposition (iron sulfide) remains effectively undissolved
Solution Approach 1:
The patent changes the chemical parameters of the cleaning composition by using polycarboxylic acid polymers with specific molecular weights (1,000 to 5,000,000 Da) and specific functional groups (carboxyl, hydroxyl, carbonyl) to achieve effective dissolution of iron sulfide. This parameter change transforms the cleaning mechanism from mere dispersion to actual dissolution of inorganic deposits.
Solution Approach 2:
The invention employs composite cleaning compositions that combine polycarboxylic acid polymers with other compatible cleaning agents. This composite approach allows the composition to simultaneously address both organic and inorganic deposits, overcoming the limitation of conventional cleaners that only handle organic materials effectively.
2Reliability
If conventional acidic cleaners are used to dissolve iron sulfide, then dissolution may be achieved, but incompatibility with metallurgy occurs
Solution Approach 1:
The patent changes the pH parameter of the cleaning composition by using polycarboxylic acid polymers that provide effective iron sulfide dissolution at near-neutral or mildly acidic pH levels. This eliminates the need for strong acids, thereby preventing corrosion of metallic surfaces while maintaining effective cleaning performance.
Solution Approach 2:
The polycarboxylic acid polymer acts as an intermediary substance that facilitates the dissolution of iron sulfide through chelation and complexation mechanisms, rather than through aggressive acid dissolution. This intermediary approach allows effective removal of inorganic deposits without the harmful effects of strong acids on metallurgy.
3Ease of operation
If conventional cleaners disperse iron sulfide, then temporary suspension is achieved, but fouling prevention is limited
Solution Approach 1:
The patent changes the chemical interaction mechanism by using polycarboxylic acid polymers that not only disperse but actually dissolve iron sulfide through chelation. This fundamental parameter change from physical dispersion to chemical dissolution provides sustained fouling prevention rather than temporary suspension.
Solution Approach 2:
The polycarboxylic acid polymer maintains continuous protective action by forming stable soluble complexes with iron sulfide, preventing reprecipitation and ongoing fouling. This continuous chemical interaction ensures sustained cleaning effectiveness and fouling inhibition over time, unlike temporary dispersion methods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The polycarboxylated β-amino alcohol polymers efficiently dissolve iron sulfide and other inorganic salts, preventing fouling and maintaining equipment efficiency, even in harsh conditions.
Implementation Method 1
dissolving at least a portion of the inorganic salt deposit
Data Source
AI summary
The present disclosure provides methods and compositions for dissolving inorganic salt deposits, such as iron sulfide deposits, in aqueous systems. A method may include adding a polycarboxylated β-amino alcohol polymer to the aqueous medium. The polycarboxylated β-amino alcohol polymer may be added by itself or as part of a composition. The composition may optionally include a solvent and/or an additive. The compositions and methods may be used for dissolving typical insoluble inorganic salts encountered in the oil and gas, recovery, water, and processing industries.