Extraction of oxalic acid from solutions of electrolyte mixture
摘要:
Extraction of oxalic acid with tributyl phosphate and triisoamyl phosphate Solutions of its mixtures with nitric, phosphoric, sulfuric, and hydrochloric acid and with ammonium nitrate and chloride was studied. In the extractability series, oxalic acid occupies the position between nitric and phosphoric acids, with sulfuric and hydrochloric acids acting as strong salting-out agents. Nitric acid salts drastically decrease the distribution ratios of oxalic acid.
Method for Producing Quaternary Ammonium Compounds
申请人:Szarvas Laszlo
公开号:US20070254822A1
公开(公告)日:2007-11-01
The present invention relates to a process for preparing quaternary ammonium compounds, which comprises reacting compounds comprising an sp
3
-hybridized nitrogen atom with a dialkyl sulfate or trialkyl phosphate and subjecting the resulting ammonium compound to an anion exchange.
Trialkylphosphates are synthesized from alcohols by reaction with reactive phosphorus oxychloride under microwave irradiations and classical heating. Effects of these irradiations on the nature of the products and on the yield are studied. The compounds were characterized by their spectroscopic data and elemental analysis. The obtained results show that the products of these reactions are essentially trialkylphosphates and alkylphosphoric acids. They always show as the nature of the formed products and the yields in trialkylphosphates are comparable to those obtained in the classical conditions of heating. The speed of the reaction was increased by a factor from 40 to 120.
The present invention provides methods for producing derivatives from cultured cells. In addition, the present invention provides methods for conversion of prenyl deerivatives, obtained from biological or petrochemical sources, to isoprene by employing chemical or biological catalysts. The present invention also provides compositions that include the cultured cells or isoprene or prenyl derivatives produced there from.
The incorporation of a minor amount of a salt of pentafluorobenzene sulfonic acid to phosphate ester based functional fluids enhances the anti-erosion properties of the fluid.
A phosphate ester-based functional fluid composition that generates reduced levels of carboxylic acid during use by incorporating at least one acid scavenger selected from the epoxides of the invention. The phosphate ester-based functional fluids are particularly useful as hydraulic fluids.