37 results about "Dichloroethyl ether" patented technology

A DECPP preparation method belongs to the technical field of chemical engineering. The method comprises the following steps: allowing diethylene glycol and phosphorus oxychloride to react by the aid of a tertiary amine acid-binding agent to generate a diethylene glycol phosphorus oxychloride oligomer; filtering to removing white solid triethylamine hydrochloride and removing unreacted phosphorus oxychloride under the action of vacuum or nitrogen; allowing the diethylene glycol phosphorus oxychloride oligomer and epoxypropare to react under the catalysis of the Lewis acid to generate a DECPP crude product; washing the DECPP crude product once with alkaline water to remove an alkaline water layer, and washing the DECPP crude product again with water to remove a water layer, and obtaining the DECPP product through underpressure distillation dehydration and filtering. According to the method, when diethylene glycol and phosphorus oxychloride react, the tertiary amine acid-binding agent is added, and the reaction temperature, the reactant charge rate and the like are reasonably controlled, and as a result, by-product dichloroethyl ether is greatly reduced, and the flame retardancy of the DECCP is improved.

The invention belongs to the technical field of water treatment chemicals and in particular relates to a biocide-algaecide for circulating water and a preparation method thereof. The biocide-algaecide is prepared from the following materials in percentage by weight: 6%-50% of polyethylether dichloride tetramethyl ethylene diamine, 8%-20% of hydrogen peroxide, 0.3%-2% of fatty alcohol-polyoxyethylene ether, 0.5%-8% of hydroxyethane diphosphonic acid and the balance of deionized water. The preparation method of the biocide-algaecide comprises the following steps: adding deionized water, the polyethylether dichloride tetramethyl ethylene diamine, the fatty alcohol-polyoxyethylene ether, the hydroxyethane diphosphonic acid and the hydrogen peroxide into the same reaction kettle according to component content in sequence, and stirring for 30-60 minutes at a temperature of 10 DEG C-35 DEG C. According to the invention, the special-purpose biocide-algaecide for a water system of circulating water which is reclaimed water and wastewater is stronger, more lasting and more complete in killing performance for microorganisms and moss in the circulating water, and better in peeling slime produced by the microorganisms, is quick and obvious in sterilizing and algae-removing effect, less in dosage, free of foams and beneficial to industrial production.

The invention relates to a preparation method of 15-crown 5-ether, which comprises the following steps: uniformly stirring triglycol and dioxane in a reaction vessel; adding sodium hydroxide and stirring, heating to 40-60 DEG C; adding a mixed liquor of dichloroethyl ether and dioxane at the temperature lower than 60 DEG C, reacting for 20-24 hours at the temperature of 60-90 DEG C; cooling to room temperature, centrifuging to obtain a filtrate; pumping the filtrate into the reaction vessel and distilling to obtain a distillation substrate; moving the distillation substrate to a stainless steel still, performing vacuum rectification, removing primary fraction to obtain the product. The preparation method has the beneficial effect that comparing with the prior art, the preparation method has the advantages of safe operation, low cost, little three wastes and high yield, and the primary fraction in the reaction can be reutilized.

The invention relates to a method for preparing diethyl 4,4-pyrandicarboxylate and derivatives thereof. The preparation method of the invention uses diethyl malonate and substituted dichloroethyl ether as raw materials, catalyzed by cuprous iodide, One or more mixtures in potassium tert-butoxide, sodium tert-butoxide, and sodium tert-amylate are alkali, and react, after the reaction is finished, the solvent is evaporated under reduced pressure, and then the distillation under reduced pressure is continued to obtain 4,4- Diethyl pyrandicarboxylate and its derivatives. The preparation method of the present invention has never been reported before, and the raw materials used are easy to obtain, the reaction method is simple and feasible, the reaction time is short, and has high application value and market value.

A preparation method of diethyl ether-α,ω-double long-chain alkyl dimethyl ammonium chloride surfactant is to add long-chain alkyl dimethyl amine tertiary amine, a solvent and an alkaline catalyst into a reactor, Chloroethyl ether is added to the dropping funnel, when the temperature of addition is reached, the dichloroethyl ether is added dropwise to the reactor, and the product is obtained by reacting under stirring conditions diethyl ether-α,ω-double long-chain alkyl dimethyl chloride ammonium chloride, the resulting liquid product was rotary evaporated to remove the solvent, washed with ether and then washed with acetone and dried in vacuo to obtain the product. The present invention has the advantages of short reaction time and high yield.

The invention provides settleability water base grinding fluid and a preparation method thereof. The settleability water base grinding fluid comprises, by weight, the following ingredients: 5-20% of settling agents, 25-60% of antirust agents, 15-40% of lubricating agents, 1-3% of sterilizing agents and the balance water. The settling agents are selected from one or more mixtures of polyethylene dichloro ethyl ether tetramethyl ethylenediamine, polyglycerol and ethylene glycol butyl ether (EGBE). The settleability composite grinding fluid has the advantages of being good in settleability, rapid in defoaming, good in antirust effect, long in service life and high in comprehensive performance cost ratio.

The invention relates to a method for preparing a copolymer of urylene dimethylamino propane and dichlorethyl ether. The method is characterized by comprising the reaction steps as follows: the synthesis of the urylene dimethylamino propane and the synthesis of the copolymer are carried out; catalyst is a mixture of niobium hydroxide and phytic acid; the mol ratio of the niobium hydroxide and thephytic acid is 1.0-6.0:1; the dosage of the catalyst is 1-10 per thousand lity of dimethylamino propylamine; molecular weight regulator is nicotinic acid; the dosage of the nicotinic acid is 0.5-1.5 per thousand; and the invention overcomes the disadvantage that the prior preparation method has high impurity content, bad luster and unstable average molecular weight, thereby causing unstable electroplating effect. The invention has the advantages of good purity and luster, stable average molecular weight, simple synthesis technology, being friendly to the environment, low energy consumption, etc.