Multipurpose scale preventer/remover
AssigneeW. R. Grace & Co.-Conn.
InventorsRobert P. Kreh, Wayne L. Henry
Life of this patent
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Abstract
A process for preventing or removing calcium and rust scale deposits from surfaces which are in contact with aqueous systems comprising adding to the aqueous system 3,5-bis(di-N,N-(carboxymethyl)aminomethyl)-4-hydroxybenzenesulfonic acid in an amount effective to remove the scale and rust deposits.
Claims7
A process for preventing or removing calcium and rust scale deposits from surfaces which are in contact with an aqueous system having a pH in the range 8 to 9 comprising adding to the aqueous system 3,5-bis(di-N,N-(carboxymethyl)aminomethyl)-4-hydroxybenzenesulfonic acid in an amount effective to remove the scale and rust deposits.
Dependencies are inferred from the claim text.