Sodium propionate

About: Sodium propionate is a research topic. Over the lifetime, 463 publications have been published within this topic receiving 9451 citations. The topic is also known as: E281 & sodium propionate anhydrous.

Viscosities and densities of alkali propionates in propionic acid + methanol mixtures

Abstract: Viscosity and density data for propionates of lithium, sodium and potassium have been measured at 308.15K in propionic acid + methanol (PA+MeOH) mixtures containing 0, 5, 15, 25% (w/w) CH 3 OH. The experimental results of viscosity have been analysed using the Jones-Dole equation. The activation parameters of viscous flow have been obtained to throw light on the mechanism of the viscous flow. The apparent molar volume of these electrolytes at different concentrations have been estimated and indicate that these behave as structure makers/promoters

Method for preparing powder metallurgy lubricants

Abstract: The invention provides a method for preparing powder metallurgy lubricants. The method includes stirring and mixing microcrystalline wax, nanometer silicon dioxide and oleic acid with one another to obtain first mixtures, heating the first mixtures, adding alkyl diphenylamine, chlorinated polyethylene and mullite into the first mixtures, mixing the alkyl diphenylamine, the chlorinated polyethylene, the mullite and the first mixtures with one another to obtain second mixtures, heating the second mixtures, stirring the second mixtures under a heat-insulation condition, and cooling the second mixtures until the temperatures of the second mixtures reach the room temperature to obtain mixtures A; heating sodium stearyl lactate, acrylamide, ammonium persulfate, methacrylic acid-dimethylamino ethyl ester, octadecyl dimethyl tertiary amine sodium propionate and sodium hexametaphosphate, stirring the sodium stearyl lactate, the acrylamide, the ammonium persulfate, the methacrylic acid-dimethylamino ethyl ester, the octadecyl dimethyl tertiary amine sodium propionate and the sodium hexametaphosphate under vacuum heat-insulation conditions, and cooling the sodium stearyl lactate, the acrylamide, the ammonium persulfate, the methacrylic acid-dimethylamino ethyl ester, the octadecyl dimethyl tertiary amine sodium propionate and the sodium hexametaphosphate until the temperatures of the sodium stearyl lactate, the acrylamide, the ammonium persulfate, the methacrylic acid-dimethylamino ethyl ester, the octadecyl dimethyl tertiary amine sodium propionate and the sodium hexametaphosphate reach the room temperature to obtain mixtures B; mixing the mixtures A and the mixtures B with one another and carrying out ball-milling on the mixtures A and the mixtures B to obtain the powder metallurgy lubricants. The method has the advantages that the flow rates of the powder metallurgy lubricants can reach 3.4g/s at least, the apparent density of the powder metallurgy lubricants can reach 3.54g/cm approximately, the compact density of the powder metallurgy lubricants can reach 2.32g/cm approximately, mechanical properties of iron-based powder metallurgy materials can be improved, and the comprehensive performance of the powder metallurgy lubricants can be greatly enhanced as compared with micro-powder wax.

Method for increasing yield of aureofuscin

Abstract: The invention relates to a method for increasing yield of aureofuscin. According to the technical scheme, the method comprises the following steps of: in a fermentation tank, inoculating streptomyces aureofuscus into a fermentation medium in the inoculum size of 8-12%, culturing at a temperature of 29 DEG C, stirring at a speed of 220r/min (revolutions per minute), adding 0.1-0.8wt% of sodium acetate or sodium propionate into the fermentation medium in a fermentation process, and fermenting for 80-85 hours. According to the method, the fermentation medium is optimized, 0.4% of sodium acetate or sodium propionate is added into the fermentation medium when fermentation is carried out for 24 hours, and high performance liquid detection shows that the yield of aureofuscin can reach 2167.4mug/mL in the fermented fermentation liquor.

Influence of different carbon sources on nitrogen and phosphorus removal performances of 4 kinds of nitrosation denitrifying phosphorus accumulating organisms

Abstract: In order to understand the needs of carbon sources of NDPAOs thoroughly,the influence of different carbon sources on nitrogen and phosphorus removal performances of Sta,Par,Kleand Bacwere studied using culture-dependent methodThe results showed that,the carbon source which was most likely to be used for the said 4 kinds of NDPAOs was glucoseUnder anaerobic condition,for the said 4 kinds of NDPAOs,the maximal degradation amounts of COD with unit cell could be obtained when glucose was used as the carbon source,which were 39×10-6,35×10-6,22×10-6 and 26×10-6 mg/cfu respectivelyFor Staand Bac,when sodium propionate was used as the carbon source,the amount of phosphate released by them reached the highest,which were 69×10-9 and 62×10-9 mg/cfu respectively;for Par,the highest release amount of phosphate was obtained with sodium acetate and sucrose as the carbon source,which was 40×10-9 mg/cfu;for Kle,the maximal release amount of phosphate could happened when sodium acetate was used as the carbon source,which was 28×10-8 mg/cfuUnder anoxic condition,for Sta,Par,Kleand Bac,the nitrite consumption by them reached the highest when sodium propionate,glucose,glucose,and sodium propionate were respectively used as the carbon source,and the consumption amount were 81×10-8,81×10-8,41×10-8 and 64×10-8 mg/cfu respectively;meanwhile,the amount of phosphate adsorbed by them also reached the highest,which were 15×10-8,13×10-8,96×10-9 and 13×10-8 mg/cfu respectively