Method for regulating water concentration in a process stream
AssigneeHoneywell International Inc.
InventorsTroy W. Francisco, Charles L. Redmon, Kenneth E. Creasy, John L. Welch, William A. Pepe
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Abstract
Provided is a method for regulating the concentration of water in the acid feed stream in a process for the production of HF by the reaction with a fluorine containing material, the method comprising: (a) providing an acid feed stream comprising bound water and free water; (b) estimating the concentration of bound water and free water in the acid feed stream by providing a probe in said feed stream; and (c) adjusting the concentration of free water in said process stream based on said estimating step.
Claims7
A method for regulating the concentration of water in the acid feed stream in a process for the production of HF by the reaction with a fluorine containing material comprising:
- (a) providing an acid feed stream comprising acid, bound water and free water;
- (b) estimating the concentration of bound water and free water in the acid feed stream providing a diamond-tipped ATR probe in at least a portion of said feed stream;
- and
- (c) adjusting the concentration of free water in said acid feed stream based on said estimating step.
A method for controlling water content of an acid comprising the steps of:
- (a) providing an acid;
- (b) determining the concentration of water in said acid using an in-line measurement system comprising a computer and an infrared analyzer equipped with a diamond-tipped ATR probe;
- and
- (c) adjusting the concentration of free water in said acid based on the concentration of water measured in step (b).
A method for manufacturing hydrofluoric acid comprising the steps of:
- (a) providing an acid mixture;
- (b) determining the concentration of free water in said acid mixture using an in-line measurement system comprising a computer and an infrared analyzer equipped with a diamond-tipped probe;
- (c) adding a drying agent to said acid mixture to form a dried acid mixture comprising a concentration of free water lower than the concentration determined in step (b);
- (d) reacting said dried acid mixture with fluorspar to form hydrofluoric acid.
A method for manufacturing hydrofluoric acid comprising the steps of:
- (a) providing a stream comprising sulfuric acid, hydrofluoric acid, fluorosulfonic acid and water;
- (b) determining the concentrations of free water and bound water in said stream using an in-line measurement system comprising a computer and an infrared analyzer equipped with a diamond-tipped ATR probe;
- (c) adjusting the concentration of free water in said acid feed stream based on said determining step;
- and
- (d) reacting said adjusted acid feed stream with fluorspar to form hydrofluoric acid.
Dependencies are inferred from the claim text.