Apparatus for automatic titration

• US 5,192,509 A
• Filed: 08/22/1991
• Issued: 03/09/1993
• Est. Priority Date: 08/22/1991
• Status: Expired due to Fees

• Current Assignee: Halliburton Company
• Original Assignee: Halliburton Company
• Inventors: Lee, Clyde L., Surjaatmadja, Jim B.
• Primary Examiner(s): Johnston, Jill A.
• Assistant Examiner(s): WALLENHORST, MAUREEN
• Application Number:
  US07/748,986
• Time in Patent Office: 565 Days
• Field of Search: 422/75, 422/82.05, 422/82.09, 422/81, 422/76, 422/77, 436/51, 436/52, 436/163
• US Class Current: 422/75
• CPC Class Codes: G01N 1/38 Diluting, dispersing or mixing samples
• CPC Class Codes: G01N 2035/00554 using ultrasound
• CPC Class Codes: G01N 2201/127 Calibration; base line adjustment; drift compensation
• CPC Class Codes: G01N 31/16 using titration
• CPC Class Codes: G01N 33/28 Oils , i.e. hydrocarbon liquids edible oils or edible fats G01N33/03
• CPC Class Codes: Y10T 436/116664 with automated titrator
• CPC Class Codes: Y10T 436/117497 with a continuously flowing sample or carrier stream

Abstract

An automatic titration device for use in either batch processing or a continuous processing mode to identify quantitative fluid properties. The device consists of a plurality of reservoirs each connected to a respective plurality of pumps. A central computer controls individual pump speeds and therefore the pump output mix through a delivery tube that delivers fluid mixture through an ultrasonic mixer to a mixing tube whereupon a color detector is disposed to detect indicator color changes of the liquid for providing indication back to the central computer for calculation of fluid presence, fluid equivalent points, and related fluid properties.

Claims

1. Apparatus for continuous titration of liquid sample comprising:

a delivery tube;

first means including a sample source for receiving and pumping a continuous flow of liquid sample into said delivery tube;

second means including a reservoir for pumping reagent at a controlled rate into said delivery tube;

third means including a reservoir for pumping selected titrant at a controlled rate into said delivery tube;

an ultrasonic mixer receiving liquids from said delivery tube;

a mixing tube passing mixed liquids from said ultrasonic mixer therethrough;

optical detector means disposed in viewing relationship adjacent to said mixing tube and producing an output signal indicative of sample titrant fluid equivalence; and

a computer receiving said detector means output signal and producing a first signal output to control the first means for receiving and pumping liquid sample, a second signal output to control the second means for pumping reagent, and a third signal output to control the third means for pumping titrant.

2. Apparatus as set forth in claim 1 wherein said second means for pumping reagent comprises:

a metering pump moving the reagent to the delivery tube at a rate controlled by the second signal output from the computer.

3. Apparatus as set forth in claim 1 wherein said third means for pumping titrant comprises:

a metering pump moving the titrant to the delivery tube at a rate controlled by the third signal output from the computer.

4. Apparatus as set forth in claim 2 wherein said third means for pumping titrant comprises:

a metering pump moving the titrant to the delivery tube at a rate controlled by the third signal output from the computer.

5. Apparatus as set forth in claim 4 wherein:

said metering pumps are syringe-type pumps.

6. Apparatus as set forth in claim 1 wherein said ultrasonic mixer comprises:

a mixing enclosure receiving liquid input from said delivery tube; and

means irradiating the mixing enclosure with ultrasonic energy in the range of 17 to 40 kilohertz.

7. Apparatus as set forth in claim 4 wherein said ultrasonic mixer comprises:

a mixing enclosure receiving liquid input from said delivery tube; and

means irradiating the mixing enclosure with ultrasonic energy in the range of 17 to 40 kilohertz.

8. Apparatus as set forth in claim 1 wherein said optical detector means comprises:

a color detector disposed in optically viewing relationship to said mixing tube.

9. Apparatus as set forth in claim 4 wherein said optical detector means comprises:

a color detector disposed in optically viewing relationship to said mixing tube.

10. Apparatus as set forth in clam 6 wherein said optical detector means comprises:

a color detector disposed in optically viewing relationship to said mixing tube.

11. An automatic titration device for identifying type and concentration of a liquid sample, comprising:

a first source of liquid sample;

a delivery tube for receiving said liquid sample at a first rate of flow;

plural means for storing and introducing a titrant and a selected reagent into said delivery tube at a second rate of flow;

an ultrasonic energy mixer receiving flow from said delivery tube and outputting flow of mixed liquid consisting of sample, titrant and reagent into a mixing tube;

a computer providing a control buss output connected to said first source of liquid sample and said plural means for storing and introducing to control said first rate of flow and said second rate of flow; and

a color detector adjacent to said mixing tube for optically viewing the mixing tube and sensing the color change occurring when the liquid sample and titrant with reagent react, said color detector producing an indicator signal for input to said computer.

12. A device as set forth in claim 11 wherein said plural means for storing and introducing a titrant and a reagent comprises:

a second source of titrant connected for flow to said delivery tube at a controlled rate; and

a third source of reagent connected for flow to said delivery tube at a controlled rate.

13. A device as set forth in claim 11 wherein said ultrasonic energy mixer comprises:

an elongated chamber receiving input flow from said delivery tube; and

a transducer directed to irradiate flow from the delivery tube within said elongated chamber with ultrasonic energy in the 17 to 40 kilohertz range.

14. A device as set forth in claim 12 wherein said ultrasonic energy mixer comprises:

an elongated chamber receiving input flow from said delivery tube; and

a transducer directed to irradiate flow from the delivery tube within said elongated chamber with ultrasonic energy in the 17 to 40 kilohertz range.

15. A device as set forth in claim 11 which is further characterized to include:

a plurality of reservoirs connected for flow to said delivery tube at a controlled rate for the selected addition of titrant and reagent.

16. A device as set forth in claim 11 which is further characterized to include:

a first pump of continuous flow type which is connected to the first source of liquid sample and which moves liquid sample into said delivery tube.

17. A device as set forth in claim 16 wherein said plural means for storing and introducing a titrant and a selected reagent comprises:

a second source of titrant;

a second pump of metering type for introducing said titrant into said delivery tube;

a third source of reagent; and

a third pump of metering type for introducing said reagent into said delivery tube.