36 results about "Sodium phenylacetate" patented technology

The invention relates to a method for synthesizing furbenicillin acid, which comprises the following steps: adding 6-APA into halogenated alkane, and dissolving the 6-APA by an alkalizer to obtain a solution a; dissolving alpha-furanuride sodium phenylacetate in the halogenated alkane, and esterifying the solution to obtain an estolide solution b of alpha-furanuride phenyl acetic acid; and after the solution a and the solution b are subjected to a condensation reaction at a temperature of between 20 DEG C below zero and zero DEC, adjusting pH to be between 5.5 and 6.7 to make the solution split phase, reclaiming an organic phase, adding an extracting agent into a water phase, acidifying and layering the solution, and dripping the extracting agent into the organic phase to separate out furbenicillin acid crystal. The method for synthesizing the furbenicillin acid fully adopts water avoidance reaction, the yield of products reaches more than 78 percent, the purity is improved to more than 90 percent, the content of the total impurities is reduced to below 10 percent, and the method has the advantages of simple production process and stable quality.

The invention provides a slow-release quenching agent for threaded steel to prevent and slow down the corrosion of threaded steel in the atmosphere. A slow-release quenching agent for threaded steel provided by the invention comprises the following components in parts by mass: 2-5 parts of sodium sulfate, 4-6 parts of sodium hydroxide, 1-2 parts of starch, and 5-7 parts of sodium bicarbonate 6-8 parts of sodium phenylacetate, 5-8 parts of alum, and 60-70 parts of water. The invention also provides a preparation method of the slow-release quenching agent for rebar. The slow-release quenching agent for rebars of the invention can effectively prevent and slow down the corrosion of rebars in the atmosphere.

The invention provides a disposal method of sodium phenylacetate deesterification liquid generated by cracking a penicillin G potassium salt crystallization mother liquor and belongs to the technicalfield of pharmaceutical wastewater disposal. The method comprises the steps of mixing a sodium phenylacetate deesterification liquid and active carbon, removing a penicillin degradation product, and conducting filtering to obtain a predisposed sodium phenylacetate deesterification liquid; carrying out primary dialysis on the predisposed sodium phenylacetate deesterification liquid to obtain a primary dialysate and a primary concentrated liquid, wherein the cut-off molecular weight of a dialysis membrane used for the primary dialysis is 6,000-10,000 Da; performing secondary dialysis on the primary dialysate to obtain a secondary dialysate and a secondary concentrated liquid, wherein the cut-off molecular weight of a dialysis membrane used for secondary dialysis is 1,000-4,000 Da; concentrating the secondary dialysate and returning the secondary dialysate to a penicillin fermentation working section. According to the disposal method, there is no need to add hydrogen peroxide or conduct crystallization and crystallization remelting, the amount of generated waste liquid is small, and the energy consumption is low.

The invention relates to a method for recovering phenylacetic acid from waste liquid in preparation of 6-aminopenicillanic acid by an enzymic method. The method comprises the following steps: 1) using toluene to extract phenylacetic acid; 2) preparing a sodium phenylacetate aqueous solution with little impurity; and 3) using macroreticular resin for recovering phenylacetic acid from a water phase containing low-concentration phenylacetic acid. According to the invention, toluene is extracted from waste liquid in preparation of 6-aminopenicillanic acid by the enzymic method, a toluene phase containing phenylacetic acid and a water phase containing low-concentration phenylacetic acid are obtained; the toluene phase containing phenylacetic acid is extracted through alkali lye to obtain the sodium phenylacetate aqueous solution with high quality, the sodium phenylacetate aqueous solution can be directly used for producing penicillin through fermentation; the water phase containing low-concentration phenylacetic acid is pretreated for recovering sodium sulfate, macroreticular resin is used for absorbing phenylacetic acid for recovery, the low concentration water after adsorption can be directly discharged, zero discharge of phenylacetic acid can be almost realized, win-win of economy and environmental protection can be achieved, the by-product sodium sulfate can be used for fermentation, and also has economic benefit.