Combined modification of ultra-stable Y zeolites via citric acid and phosphoric acid
نویسندگان
چکیده
منابع مشابه
The environmental influence of Light Coke, phosphoric acid, and citric acid on elastomeric chains.
AIM The purpose of this study was to evaluate the in vitro effect of Light Coke, phosphoric acid, and citric acid on the force decline pattern of two types of elastomeric chains. METHODS AND MATERIALS One hundred sixty gray colored elastomeric chain modules, 80 Chainette (GAC) and 80 Sunburst (GAC) chains, were divided into four groups for immersion into Light Coke, phosphoric acid, citric ac...
متن کاملDestructive effects of citric acid, lactic acid and acetic acid on primary enamel microhardness
Objective: This study aimed to assess the destructive effects of citric acid, lactic acid and acetic acid produced from the fermentation of foods on primary teeth enamel. Methods: This in vitro, experimental study was conducted on 24 sound primary teeth. The teeth were polished with a fine abrasive paper under running water. Tooth pieces measuring 3 × 4 × 3mm were cut out of the teeth and s...
متن کاملDecalcifying effect of 15% EDTA, 15% citric acid, 5% phosphoric acid and 2.5% sodium hypochlorite on root canal dentine.
AIM To evaluate and compare ex vivo the decalcifying effect of 15% EDTA, 15% citric acid, 5% phosphoric acid and 2.5% sodium hypochlorite on root canal dentine. METHODOLOGY Two 2-mm-thick slices were cut from the coronal third of the root of 10 human incisors. Each slice was sectioned into two equal parts. Specimens were assigned to one of four groups (n = 10) for immersion in 20 mL of either...
متن کاملCitric acid production.
Citric acid is a commodity chemical produced and consumed throughout The World. It is used mainly in the food and beverage industry, primarily as an acidulant. Although it is one of the oldest industrial fermentations, its World production is still in rapid increasing. Global production of citric acid in 2007 was over 1.6 million tones. Biochemistry of citric acid fermentation, various microbia...
متن کاملCitric Acid Determination
Three types of methods have been proposed for the determination of citric acid in urine. Salant and Wise (1) used the unspecific mercuric sulfate reagent of Deniges (2) in a study of the toxicity of citrates. Thunberg (3) developed an enzymatic method employing a dehydrogenase said to be specific for citrate. The remaining methods depend on the so called pentabromoacetone method of Stahre (4), ...
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ژورنال
عنوان ژورنال: Applied Petrochemical Research
سال: 2014
ISSN: 2190-5525,2190-5533
DOI: 10.1007/s13203-014-0070-1