US 11,668,643 B1
High temperature high pressure (HTHP) cell in sum frequency generation (SFG) spectroscopy for oil/brine interface analysis with salinity control system
Dong kyu Cha, Al Shafa (SA); Mohammed Badri AlOtaibi, Dhahran (SA); Subhash C. Ayirala, Dhahran (SA); Salah H. Alsaleh, Dhahran (SA); and Ali Abdallah Al-Yousef, Dhahran (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Dec. 10, 2021, as Appl. No. 17/643,667.
Int. Cl. G01N 21/03 (2006.01); G01N 21/31 (2006.01); G01N 1/44 (2006.01); G01N 33/28 (2006.01); G05D 23/22 (2006.01)
CPC G01N 21/0317 (2013.01) [G01N 1/44 (2013.01); G01N 21/31 (2013.01); G01N 33/2823 (2013.01); G05D 23/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A pressure cell for sum frequency generation spectroscopy, the pressure cell comprising:
a metal pressure chamber including:
a liquid sample holder that retains a liquid sample;
a removable lid that seals against a base to enclose the liquid sample holder in an interior of the metal pressure chamber;
a window in the removable lid that allows the liquid sample to be optically accessed from an exterior of the metal pressure chamber;
a sample inlet that flows the liquid sample from the exterior of the metal pressure chamber to the liquid sample holder in the interior of the metal pressure chamber at a predetermined flow rate; and
a sample outlet that flows the liquid sample from the liquid sample holder to the exterior of the metal pressure chamber;
a heating stage, disposed in the interior of the metal pressure chamber, that heats the liquid sample;
a chamber pump, connected to the interior of the metal pressure chamber, that pressurizes the interior of the metal pressure chamber;
a salinity control system comprising a membrane coupled to the sample inlet, wherein the membrane is configured to reduce a salinity level of the liquid sample; and
a controller that controls the chamber pump, the salinity control system, and the heating stage to control a pressure of the interior of the metal pressure chamber, the salinity level of the liquid sample, and a temperature of the liquid sample, respectively.