A PHYSICAL CHEMICAL EXPLANATION FOR DETERIORATION IN THE HOT WATER PROCESSABILITY OF ATHABASCA OIL SAND DUE TO AGING

1989 ◽  
Vol 7 (5-6) ◽  
pp. 699-725 ◽  
Author(s):  
Dean Wallace ◽  
Deborah Henry ◽  
Koichi Takamura
Keyword(s):  
Oil Sand ◽  
Author(s):  
Yoshitaka Wakisaka ◽  
Hirokazu Okawa ◽  
Kumi Saigo ◽  
Takahiro Kato ◽  
Katsuyasu Sugawara

Abstract Oil sand contains about 15 wt% bitumen which contains approximately 5 wt% sulfur. Bitumen must be extracted from sand and desulfurized before use as a fuel. Currently, bitumen is recovered from sand using hot water (80 °C) and sulfur is removed by hydrodesulfurization (200–450 °C), which both consume large amounts of energy. Therefore, we investigated the separation of bitumen from sand and the oxidative desulfurization of bitumen using ultrasound and n-pentane at 20 °C. We successfully extracted 95 wt% bitumen from sand and removed 66.1% of the sulfur by oxidative desulfurization using 15 wt% H2O2 and 5 mol/L NaOH.


1969 ◽  
Vol 72 (3) ◽  
pp. 469-474
Author(s):  
Noemí Díaz ◽  
Teresita Rodríguez ◽  
Isabel B. De Caloni

Mangos given hot water treatments for 0 , 90, 120, 150 and 180 minutes, followed by cold storage for seven and 14 days, were sensory-evaluated for overall quality, shelf life, and percentage fruit decay. Hot water treatment did not affect the physical, chemical and organoleptic characteristics studied. The decay observations indicate that fruits held for seven days in cold storage (50-55° F and 85-90% RH) should be of good marketing quality for up to 12 days. If kept for 14 days in cold storage, they should be marketed within four to five days after removal from the cold.


2020 ◽  
Vol 9 (10) ◽  
pp. e4619108590
Author(s):  
Franceline Iaguczeski da Silva ◽  
Fernanda Arpini Souza ◽  
Janice Ruschel ◽  
Andréa Cátia Leal Badaró ◽  
Ivane Benedetti Tonial ◽  
...  

Lactose intolerance is a disorder that affects a large part of the population, in this sense, it becomes feasible the study of manufacturing techniques that make it possible to guarantee the elaboration of products with low lactose content. Taking this into account, the present study aimed to evaluate the lactose content and physical-chemical characteristics of washed mass cheeses during the maturation period. Pasteurized whole milk with initial lactose percentage of 4.55 g/100 g was used and after coagulation, cutting and stirring, a partial (10% of the initial volume) whey removal was followed by addition of the same volume of hot water at 75 °C. Cheeses were analyzed at 0, 7, 15, 30 and 60 days of maturation for lactose content, acidity, pH, water activity, moisture, fixed mineral residue and chlorides. A lactose content of less than 0.005 g/100 g was obtained shortly after manufacturing (fresh product). The starter culture used and the process of washing the mass likely contributed to the low lactose content of the cheeses. Thereby is presented a viable alternative for the production of naturally lactose-free cheeses.


1998 ◽  
Vol 56 (3) ◽  
pp. 243-261 ◽  
Author(s):  
Laurier L Schramm ◽  
Cassandra Morrison ◽  
Elaine N Stasiuk
Keyword(s):  

1971 ◽  
Vol 1971 (1) ◽  
pp. 533-539 ◽  
Author(s):  
Paul G. Mikolaj ◽  
Edward J. Curran

ABSTRACT A pilot device capable of cleaning one ton per hour of oil-contaminated beach sand was built and tested. The processing scheme was a variation of the hot water method used in the Athabasca Tar Sand Deposits and utilized liquid fluidization to effect the oil-sand separation. Tests performed with a sand mixture containing 1 to 2 percent of a 23° API crude oil showed that upwards of 95 percent of the oil could be removed. Operation with a 14° API residual oil was less satisfactory. The hot water fluidization process is judged to be a technically feasible concept although there appear to be definite limitations as to its general applicability. These limitations are concerned primarily with the range of sand particle sizes that can be fluidized without excessive elutriation. Additional experimentation is needed to further delineate the range of potential application.


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