萃取蒸餾法分離鄰氯甲苯和對(duì)氯甲苯

1、萃取蒸餾法分離鄰氯甲苯和對(duì)氯甲苯This article is contributed by hjt3715948Pdf documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view.VIP information Since the market, by the vast number of users welcome, an

2、d by pharmaceutical companies, and achieved significant economic benefits. The indicators meet the United States, British and Japanese Pharmacopoeia standards. Only domestic demand for 30 tons per year, the countrys 00 international demand is also great. Cost of raw materials 2 yuan / K; reference p

3、rice 5g8, 00 - 0 yuan / K; the annual output of 1 0 tons. In the process of 1g034-methoxybenzaldehyde intermediate synthesizing sulfonamide synergist trimethoprim. Completely break the previous half synthesis process route,The process and process level is the most advanced in the worldTrimethoprim s

4、ynthesis method. By paracresol synthesis of benzaldehyde dibromide (? 4 - hydroxy, 35 two bromo benzaldehyde) crude hydrobromic acid recovery and quality; hydrobromic acid production; synthesized by benzaldehyde dibromide.Through the provincial technical appraisal, won the science and technology pro

5、gress award of science and technology commission.From the new technology of industrial preparation of refined naphthalene QijiangIntroduction: the new technology of using naphthalene as raw material, using the new separation technology (membrane) preparation of high purity naphthalene, has simple pr

6、ocess, easy operation, small investment,Low cost, low energy consumption, low pollution advantages. The industrial operation confirmed by the process from the production of naphthalene, technical indicatorsPreparation of hardened oil by hydrolysisProduction technology of stearic acid and glycerinDes

7、cription: stearic acid products are widely used in rubber, plastics, textiles, paper making, food and other industries, glycerin is also medicine,Cosmetics, tobacco, food, paper making, explosives and other industries are not allowedThe lack of important raw materials, the use of hardening oil, hydr

8、olysis, distillation and other productionMore than the national standard of commodity, the yield is more than 9%, 5 per ton of refined naphthalene production cost is 50% lower than the original cost. thisThe promotion of the project to enlarge and reduce the production cost of refined naphthalene pr

9、oduction, it has great practical significance.The process of preparation of stearic acid, the by-product glycerin water evaporation. DistillationA preparation of industrial glycerin, this technique is suitable for township enterprises andOneMedium-sized enterprises.A new process for full cycle produ

10、ction of oxalic acidRecovery of caprylic acid, octanoic acid and synthesis of acid chloride from pharmaceutical waste solutionAbstract: This study selected phosphorus trichloride as acyl chlorination agent in the production of pivaloyl chloride, the reaction condition is mild, easy to control, more

11、suitable for industrialized production. Initial separation of pharmaceutical waste liquid,After the low boiling point material is steamed out, coarse vitamin B acid is obtained. The 10C acid is collected by the method of rectification, and the product of the product of the purity of more than 9% is

12、obtained by recrystallization after 6 recrystallization. The residual liquid can be recovered by 9 rectification method, and the refined caprylic acid can be obtained by refining and rectifyingIntroduction: the existing oxidation process for oxalic acid production all existsIn low yield, nitrate con

13、sumption, comprehensive utilization and the reaction solution is difficult, the recovery of dilute nitric acid not easily digested in situ shortcomings; at the same time due to the weak market, the majority of exportsFactories have been discontinued, resulting in idle equipment and damage. One way t

14、o solve the problem is to expand market sales; on the other hand, we shouldTransform the original process. The process is reformed by using the equipment of the original processExtraction distillation separationGet 9% of the octanoic acid product. FiveOrtho - chloro - toluene and P - chloro - toluen

15、eThe present invention provides an extraction distillation separation of an adjacent groupA process for the production of toluene and chlorine chlorideTrimethoprim (M) in the total synthesis of IPIntroduction: the starting material is cresol, which is threeDuring the process, one is continuously add

16、ed from the upper half of the distillation columnL8VIP information The extraction of a soluble substance from the solution of toluene and tolueneAgent.Description: the adhesion, porosity and corrosion resistance of the coatingContinuous fatty acid distillation techniqueThis equipm

17、ent is suitable for producing mixed fatty acids by hydrolysis of black fatty acid from hydrolyzed or degraded oil. This device has been put into operation in Wuxi for more than one year. The device is also suitable for producing mixed fatty acids from coconut oil, palm oil and hydrolyzed fatty acids

18、 of extremely hardened oils. Fatty acids are widely usedGuangzhou.Adopt international standard (S45 test, guarantee all I027)Target meets requirements. The economic index of coating: 0 square meters. 3 yuan /Lu (0m guarantee that one square meter area, plating 1 thick coating 0mU layer, its chemical

19、 raw material consumption cost is not higher than 3O yuan). answerScope: (1) corrosion resistant coating of chemical equipment, such as reactionLining, plate or vertical tube heat exchanger protection, chemical industryWith the antiseptic treatment of ball valve and butterfly valve of the injection;

20、 (2) Tanaka oilEquipment and piping, such as oil wells, water pipes, connecting rod pumps, mud pumps, valves, etc., have been successfully used: (3) automotive workersNew technology for hydrogen production from methanol by high recovery rateIntroduction: hydrogen is necessary for hydrogenation in ch

21、emical productionBecause of the different raw material sources and different purity requirements of hydrogen, the investment scale and hydrogen production cost of hydrogen production plant vary greatly. The methods of hydrogen production in industry are hydrocarbon steam conversion, electrolysis wat

22、er and so on. Hydrogen production by steam reforming of hydrocarbons is suitable for hydrogen useWear and corrosion resistant parts, such as exhaust lines and silencersThe differential gear shaft and the synchronous gear, the aluminum radiator and the hoseJoints, etc.Study on improving adsorption ef

23、ficiency of activated carbonIntroduction: activated carbon (carbon) is one of the most important materials for removing organic compounds in water at home and abroadThe energy consumption and unit hydrogen are the occasions of large quantity and large scale installationThe production cost is low, an

24、d the electrolytic water is suitable for occasions with small hydrogen consumption, and the device is also of small size.Directly affect the removal rate of GAC (granular activated carbon) to organic matter, therefore, the influence of influent organic matter is not studiedThe same pretreatment meth

25、od is beneficial to further improve the GAC bed pairsPhosphating solution matching projectIntroduction: this project introduces a German equipment stream for a companyRemoval effects of organic pollutants. The present study can improve the operating conditions of existing GAC beds and improve the ef

26、ficiency of organic matter removalWater purification quality.Water line, the localization project of American phosphating agents. afterTests have been carried out to reach the US level and are now in use. The phosphating solution has been successfully matched, indicating that the phosphating level has reached a