公开(公告)号：US5090817A

公开(公告)日：1992-02-25

申请号：US638738

申请日：1991-01-08

申请人： Victoria S. Ker ,  Charles Tsang

发明人： Victoria S. Ker ,  Charles Tsang

IPC分类号： B23Q15/00 ,  G01N33/28 ,  G05B19/4097

CPC分类号： G01N33/2811

摘要： The present invention relates to an apparatus and process for estimating the pour point of a hydrocarbon oil. The pour point of hydrocarbon oil gives an indication of its low temperature properties, and is determined according to the time-consuming procedures set out in the American Society of Testing and Materials (ASTM) test D-97. The present invention generally provides a convenient means to estimate the pour point of a hydrocarbon oil, by directing a flow of pressurized gas towards a sample of the oil, and determining the warmest temperature at which the gas flow does not cause a substantial surface wave on the oil surface.

摘要翻译： 本发明涉及用于估计烃油的倾点的装置和方法。 烃油的倾点表明其低温性能，并根据美国测试和材料协会（ASTM）试验D-97中规定的耗时程序确定。 本发明通常提供了一种方便的手段来估计烃油的倾点，通过将加压气体流引向油的样品，并确定气流不会引起实质的表面波的最温暖的温度 油面。

公开(公告)号：US5088833A

公开(公告)日：1992-02-18

申请号：US454270

申请日：1989-12-21

申请人： Charles Y. Tsang ,  Victoria S. Ker

发明人： Charles Y. Tsang ,  Victoria S. Ker

IPC分类号： G01N25/02 ,  G01N25/04 ,  G01N33/28

CPC分类号： G01N33/2811

摘要： Apparatus for monitoring the cloud point of a liquid, or the temperature at which any light scattering phase occurs therein, comprising a light-proof and light-absorbing chamber, and a liquid sample-receiving receptacle within the chamber having a bottom formed by a non-light-scattering surface; this surface being in thermal contact with a heating or cooling device, such as a thermoelectric cooler, and with a temperature measurement device. The chamber can be opened to allow access to the receptacle so that sample liquid can be placed therein. A light beam source is located to direct a beam of light onto the surface at an incident angle so that light from the beam is reflected or absorbed by the surface. A light detector including a lens and an array of detection cells is arranged so as to detect scattered light which is produced when solid material forms in the liquid as it is cooled or disappears on heating. The melting point of a solid, or the boiling point of a liquid, can be detected, in additoin to cloud points.