30results about How to "Simple waste treatment" patented technology

The invention relates to a new process for producing high-purity iminodiacetonitrile. The new process is characterized in that: high-purity reaction liquid is obtained by using a process for synthesizing iminodiacetonitrile at high conversion rate; and white or pale yellow high-purity iminodiacetonitrile with iminodiacetonitrile content of over 99 percent is produced by using a synthesis reaction liquid decolorizing process, an impurity removal process and three crystallization processes, wherein a part of thin waste liquid produced during the production is returned to a raw material preparation system, the rest part of waste liquid is conveyed to a biochemical device for processing, and the produced thick waste liquid is directly conveyed to an incinerator for processing, so that pollution-free production of the entire process is realized. The new process has the advantages of high product quality, white color, purity of over 99 percent high product yield, iminodiacetonitrile yield of about 90 percent during the entire production process and low three-waste treatment difficulty.

The process of eliminating vanadium impurity from titanium tetrachloride (TiCl4) product with aluminum powder as direct reductant includes the following steps: feeding TiCl4 solution to be refined and surface activated aluminum powder into rectification tower, adding AlCl3 as catalyst and heating to boiling point to produce vanadium eliminating reaction; evaporating TiCl4 containing AlCl3 and high boiling point impurity inside the rectification tower to eliminate AlCl3 and high boiling point impurity, and condensing TiCl4 vapor escaping through the tower top to obtain refined TiCl4 product; and exhausting tower solution regularly or continuously to maintain the required AlCl3 concentration inside the tower. The said process can eliminate vanadium and high boiling point impurity simultaneously, and has continuous operation, low cost, high product quality and other advantages.

The invention discloses a surface treatment method for a bismuth telluride base thermoelectric material wafer. The surface treatment method includes the following steps that the wafer is put into oil removing liquid for oil removing, and cold water is used for thorough flushing; activating liquid is firstly used for conducting room-temperature activating; then an electrolyte the same as the oil removing liquid is used for treatment; finally, pre-nickel-plating activating liquid is used for treatment; nickel plating liquid is used for electroplating, the wafer is taken out after nickel plating, and cold water is used for thorough flushing; and tin bismuth plating liquid is used for electroplating, the wafer is taken out after tin bismuth plating is over, cleaning and drying are conducted, and surface treatment of a bismuth telluride base thermoelectric material is completed. By means of the surface treatment method, a multi-step activating treatment process is adopted for ensuring the activating effect of the surface of the wafer, and the plating combining strength is high.

The present invention relates to the preparation of acetyl potassium sulfanilate; preparation of substituted phenoxy sulfamide; preparation of acetyl acetoamino-N-sulfuryl-substituted phenoxyl; preparation of acetyl potassium sulfanilate. The present invention is simple in technology, relatively short reaction time, easy treatment of wastes.

The invention relates to a synthesis method of a nitrogen-containing heterocycles ferrocene derivative. The synthesis method comprises the following steps of (I) introducing an aldehyde group into nitrogen-containing heterocycles in the chemical structure of a raw material a to obtain an intermediate b; (II) performing a hydroxylamine reaction on the aldehyde group in the chemical architecture ofan intermediate b to obtain a hydroxylamine group namely an intermediate c; and (III), performing a reduction reaction on the hydroxylamine group in the chemical architecture of the intermediate c, toobtain the nitrogen-containing heterocycles ferrocene derivative 1. The synthesis method is simple in steps, reagents and equipment which have risks for human bodies or environment do not need to beadopted, and mass production and application of the nitrogen-containing heterocycles ferrocene derivative are convenient.

The invention belongs to the technical field of medicines, and particularly relates to a preparation method of a triazine ring. The method comprises the following steps: performing cyclization reaction on 2-methylthiosemicarbazide, diethyl oxalate, dimethylaminopyridine and metal sodium, adding hydrochloric acid for crystal transformation reaction after the cyclization reaction is finished to obtain a triazine ring sodium salt crude product, and adding hydrochloric acid into the triazine ring sodium salt crude product for refining reaction to obtain the triazine ring. The method has the advantages of simple raw materials, high yield, easy treatment and low cost.