3 results about "Tetrabutylammonium hydroxide" patented technology

The present disclosure relates to a kind of UZM-8 molecular sieve and its preparation method, catalyst and application containing UZM-8 molecular sieve, the method includes: the raw material mixture containing silicon aluminum source, first template agent, second template agent and water is carried out hydrothermal crystallization reaction and recovers product;Wherein, the first template agent is at least one selected from tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide and tetrabutylammonium hydroxide, the second template agent is dimethyl diethyl ammonium hydroxide.Compared with the UZM-8 molecular sieve synthesized by traditional hydrothermal method, the UZM-8 molecular sieve with high crystallinity, high specific surface area and pore volume can be synthesized in the present disclosure, while the synthesis cost of molecular sieve is significantly reduced.

This invention discloses a high-performance liquid chromatography (HPLC) method for the purity determination of 4-nitrophenylalanine, including the chemical purity determination of D-4-nitrophenylalanine, L-4-nitrophenylalanine, and DL-4-nitrophenylalanine. The method involves using a chromatographic column packed with octadecylsilane-bonded silica gel, and a mobile phase of 0.1 mol / L ammonium formate buffer-methanol containing 0.1% tetrabutylammonium hydroxide (v / v) at a ratio of 78-82:18-22. After injection, the purity of the sample is calculated using the peak area normalization method. This method can effectively separate the components in a short time and features high precision and simple operation.

The application relates to the oil field oil extraction scale inhibition technical field, in particular to a sulfonate scale inhibitor for oil displacement and a preparation method thereof. The sulfonate scale inhibitor for oil displacement is obtained by taking linear polystyrene as a starting raw material, carrying out twice acetyl sulfuric acid sulfonation reaction, and then carrying out two-stage tetrabutylammonium hydroxide neutralization and sodium bicarbonate / sodium hydroxide step-by-step sodium treatment. The obtained scale inhibitor has good dispersion stability in high salinity water, has inhibition on calcium carbonate, barium sulfate and strontium sulfate composite scale, can keep compatibility with a petroleum sulfonate oil displacement system, and can be used for oil field oil displacement or squeeze anti-scale operation.