4results about How to "Precise pH control" patented technology

The present application relates to wastewater purification reuse system technical field, more specifically, it relates to a kind of wastewater purification reuse system for heat-sensitive paint production, comprising: data acquisition module;Wastewater pH adjustment controller;Based on the comparison result of the pH value of heat-sensitive paint wastewater and set target pH value, generate pH value adjustment coefficient;Based on pH value adjustment coefficient, generate alkaline solution adding instruction;Liquid alkaline adjusting device, with wastewater pH adjustment controller communication connection, receive alkaline solution adding instruction;Add alkaline solution to the blending pool;Receive the pH value and temperature of the liquid of blending completion sent by data acquisition module;Based on the comparison result of the pH value of blending completion liquid and set target pH value, generate pH value adjustment coefficient;Based on pH value adjustment coefficient, generate liquid temperature regulation instruction;Blending liquid pH adjustment mechanism, with blending liquid pH adjustment controller communication connection, for the liquid temperature regulation of blending completion liquid in blending pool.

The application discloses a preparation method of an iron-based catalyst, the iron-based catalyst and application of the iron-based catalyst. The preparation method mainly comprises three steps: firstly, a mixed solution of an iron-based precursor and an organic template agent with uniform distribution is prepared by means of stable temperature and autogenous pressure in a solvothermal process; subsequently, a weak alkaline precipitant without alkali metal is added into the mixed solution under heating to prepare an iron-based precipitate; finally, a honeycomb-shaped iron-based catalyst for ortho-para hydrogen conversion is prepared through steps of cleaning, drying, calcining, granulating, re-cleaning and activation. By adding the organic template agent, the pore structure of the catalyst is effectively improved without affecting the crystal type of the catalyst, and the performance of the catalyst is improved; and the weak alkaline precipitant without alkali metal is adopted, so that the controllability of the preparation process of the catalyst is enhanced, the influence of impurities such as alkali metal ions on the performance of the catalyst is effectively avoided, and the method has a simple process and high practical potential.

The invention discloses a method for preparing 5-methoxytryptamine by a one-pot method, which comprises the following steps: by taking 1, 2, 3, 4-tetrahydro-6-methoxy-1-oxo-beta-carboline as a raw material, neutralizing by using strong acid instead of traditional acetic acid during ring-opening reaction, and carrying out decarboxylation reaction on a ring-opening product without separating to prepare the 5-methoxytryptamine. The method can completely avoid the generation of sodium acetate in the ring-opening reaction in the traditional technology, reduces the influence on the next decarboxylation reaction, and can directly perform the decarboxylation reaction without separating the ring-opening product, thereby effectively solving the problem that the decarboxylation reaction needs to be directly performed in the prior art. According to the method for preparing the 5-methoxytryptamine by using the 2, 3, 4-tetrahydro-6-methoxy-1-oxo-beta-carboline as the raw material, the defects that weak acid is left and an intermediate needs to be separated in the method are overcome, and the reaction route is shortened. The method improves the product yield and purity, has the advantages of simplicity and convenience in operation, high product purity, less three wastes and low cost, and is suitable for large-scale industrial production.

The utility model provides an oxygen conveying ultrasonic wave high -efficient leaching control system. Include: oxidation reaction groove, pump unit, valve group, including oxygen valve and steam valve, flowmeter group, pH meter, stirring motor, liquid level meter all are established on oxidation reaction groove, thermometer, be established on oxidation reaction groove, be used for monitoring the temperature of solution in oxidation reaction groove, pressure gauge, be established on high -efficient oxidation generator, be used for monitoring the pressure in high -efficient oxidation generator, central controller is connected with pump unit, valve group, flowmeter group, stirring motor, pH meter, liquid level meter, thermometer and pressure gauge electricity. Utilize above -mentioned system can realize the automatic regulation and control of oxidation reaction groove's feeding state and high -efficient oxidation generator oxygen intake's automatic regulation and control, convenient to the leaching process monitoring, debugging, alarm, stabilize simultaneously feeding, the accurate control of oxidation reaction groove's pH value and temperature value, high -efficient oxidation generator oxygen intake's accurate control and pressure monitoring.