Method for Removing Contaminants from the Inner Wall of a Magnetic Stirred Reactor (Part 2)

For magnetically driven reactors that have been in long-term use, some stubborn residues tend to accumulate on the inner walls of the reactor vessel. These residues can impair reaction efficiency or lead to deviations in the reaction products, making their removal a significant headache for most operators. Below, experts from Weihai Magnetic Reactor will provide an online explanation to address this issue. The main removal methods include mechanical cleaning, alkaline and steam cleaning, acid pickling, solvent-based removal, detergent cleaning, and ultrasonic cleaning. This chapter focuses primarily on mechanical cleaning as well as alkaline and steam cleaning methods; for information on other methods, please refer to Method (II). I. Mechanical

Method for Removing Contaminants from Laboratory Reactors (Part 1)

It is crucial to select an appropriate method for cleaning the surface of the reactor vessel in laboratory reactors that are used over the long term. Common methods include mechanical cleaning, chemical cleaning, and solvent cleaning. However, no single method is universally effective. For example, solvent cleaning cannot remove corrosion products, steam degreasing cannot remove inorganic contaminants, nor can it effectively clean resin-based deposits. When choosing a cleaning method for the inner walls of laboratory reactors, the following points should be taken into account: First, it is essential to identify the type of contaminants present and select a suitable cleaning method accordingly. It is important to note that solvent-based cleaning—including solvent vapor degreasing, ultrasonic cleaning, and water-based detergents—is...

Design Method for Industrial Reactors

Before manufacturing, industrial reactors must have their volume, vessel dimensions, and cylinder wall thickness confirmed based on the requirements of the production process. Below, the designers from Weihai Self-Control Reactor Co., Ltd. will guide you through simple conversions related to these issues. First, Volume: The material balance should be calculated according to the reaction time and target production output. (1) Calculate the processing capacity of raw materials or the yield of products per unit time. Based on this processing capacity or yield and the rate equation, determine the reaction time. Then, use the reaction time to calculate the effective volume of the reactor. The total volume of the equipment is equal to the effective volume divided by a factor of 0.6 to 0.8. Second, Nominal Reaction Pressure: When the reaction process involves...

Installation and Use of Magnetic Stirred Reactors

Host Installation and Operation (1) Equipment Environment: The magnetic stirrer reactor should be placed in a high-pressure operating room that meets explosion-proof requirements. When installing multiple magnetic stirrer reactors, they should be arranged separately, with reliable explosion-proof walls providing separation between every two reactors. Each operating room must have an exit directly leading to the outside or to a passageway. If explosive media are present, the equipment location must be well-ventilated. (2) Installation and Sealing of the Reactor Lid: The reactor body and the reactor lid adopt a sealing design featuring line contact between conical and arc surfaces. Tighten the main bolts to ensure that the two components are firmly pressed against each other, achieving a reliable seal. When tightening the main bolts, do not exceed the specified torque limit.

Application Characteristics of High-Pressure Reactors for Nickel and Nickel-Based Alloys (Part 1)

High-pressure reactors made of nickel and nickel alloys exhibit superior corrosion resistance to strong acids, strong bases, and other highly corrosive media compared to those made of stainless steel and other non-ferrous metals. They also operate at higher service temperatures, making them one of the most important types of high-pressure reactors currently available. When using high-pressure reactors made of nickel and nickel-based alloys, attention should be paid to the following points regarding their allowable operating temperatures: 1. If the reactor is constructed from a nickel alloy whose primary alloying elements are chromium or molybdenum, and the service conditions of the vessel’s medium could potentially induce intergranular corrosion in these nickel alloys, the maximum allowable operating temperature of the equipment should not exceed the long-term aging temperature that would increase the susceptibility of these nickel alloys to intergranular corrosion.

Running a business with integrity for 18 years—Weihai Self-Control Reactor

High-pressure reactors and stainless steel reactors—Weihai Zikong Reactor Co., Ltd. was established in 1999 and is one of the leading manufacturers of magnetic high-pressure reactors and magnetic stirrers in China. With 18 years of industry experience, 18 years of accumulated business expertise, and 18 years of proven, reliable service, we are truly worthy of your trust. For the past 18 years, we have been dedicated to providing customers with specialized services in chemical reaction process screening, process development, and process optimization. Our products primarily serve the following key sectors: pharmaceutical and drug research and development, fine chemicals, petrochemicals, and other chemistry-related industries. We are committed to designing and manufacturing top-tier high-pressure reactors and comprehensive high-pressure reaction platform systems that can...

Instructions for the Pressure Test Method of Hydrogenation Reactors (Part 2)

In the previous issue, we discussed the testing methods used in the hydraulic pressure test of high-pressure hydrogenation reactors. Next, we’ll explain the pneumatic pressure test: 1. During the pneumatic pressure test, safety measures must be in place, and the gas used for the test should be dry, clean air, nitrogen, or other inert gases. 2. For high-pressure hydrogenation reactors made of a single material, the medium temperature during the pneumatic pressure test must not be lower than room temperature. For hydrogenation reactors with linings or composite layers, the medium temperature must not be lower than 15°C. 3. During the test, the pressure should be increased slowly—up to 10% of the specified test pressure, but not exceeding 0.05 MPa—and held at that pressure for 5 minutes, then...

The working principle of a reactor and a detailed explanation

Check whether the reactor, agitator, rotating parts, auxiliary equipment, indicating instruments, safety valves, pipelines, and valves meet safety requirements. Also, verify that water, electricity, and gas supply comply with safety standards. Relevant safety guidelines for operation: 1. Regularly monitor the operational status of the reactor at all times; if any abnormalities are detected, immediately stop the reactor for inspection and repair. 2. Before opening the steam valve, first open the exhaust valve, then open the inlet valve. When opening the steam valve, do so gradually to preheat the jacket slowly and increase the pressure step by step; the pressure inside the jacket must not exceed the specified limit. 3. When cleaning titanium-epoxy equipment, never use alkaline solutions to scrub the reactor, and take care not to damage the enamel coating. 4. Before adding materials, first start the agitator and ensure it is running smoothly without any unusual noises.

Application of High-Pressure Reactors in Supercritical Water-Related Experiments

Supercritical water is the state of water under conditions of high temperature (above 374°C) and high pressure (above 22.1 MPa). This supercritical water possesses many unique characteristics. For instance, it exhibits exceptionally strong oxidizing properties. When a reaction medium requiring treatment is placed into supercritical water and oxygen is then dissolved into it, its oxidizing power surpasses that of substances such as potassium permanganate. Moreover, many substances can be burned in supercritical water; additionally, supercritical water can dissolve a wide range of substances that are insoluble under conventional conditions, and after dissolution, the volume of these substances significantly shrinks. Fourth, supercritical water displays an extraordinary catalytic effect, greatly accelerating the rate of catalytic reactions. The numerous advantages of supercritical water have made it a valuable tool for researchers.

Maintenance and Care of Stainless Steel Reactors

Stainless steel reaction vessels offer advantages such as rapid heating, high-temperature resistance, corrosion resistance, hygiene, no environmental pollution, automatic temperature control without the need for a boiler, and ease of use. They are widely used in industries including petroleum, chemical engineering, rubber, pesticides, dyes, pharmaceuticals, and food processing. With 18 years of experience in manufacturing and processing self-controlled reaction vessels, we ensure quality and timely delivery. Our contact number is 0631-5757988. These vessels are suitable for production-oriented users in sectors like food processing, as well as for various scientific research and experimental projects. They are designed to carry out a wide range of process operations, including hydrolysis, neutralization, crystallization, distillation, evaporation, storage, hydrogenation, hydrocarbonization, polymerization, condensation, heated mixing, and constant-temperature reactions. A key feature of stainless steel reaction vessels is their mirror-finished inner surface.

High-pressure reactor vessel and lid sealing

The high-pressure reactor is a precision piece of equipment. Its sealing surface relies on the mutual contact between conical surfaces for sealing; therefore, the two mating sealing surfaces must never be damaged or scratched. When installing the reactor lid, first place the reactor body in position, then carefully align and secure the lid onto the bolts. When tightening the bolts, always follow a diagonal, symmetrical pattern, applying even pressure in several stages. This ensures that the sealing surfaces between the lid and the reactor body achieve the best possible seal. At the same time, avoid applying excessive force—too much torque can accelerate wear and reduce the service life of the sealing surfaces. After removing the reactor lid, it is recommended to use a dedicated rack specifically designed for storing the lid, thereby preventing damage caused by various factors.

Structure and Principle of an Autoclave

A piece of equipment used in industrial settings for carrying out chemical reactions under high pressure. Some models are equipped with stirring or heat-transfer devices. It is also referred to as a pressurized reactor. The reactor lid is fitted with a pressure gauge, a rupture disc safety device, vapor-liquid phase valves, temperature sensors, and other components, allowing operators to monitor the reaction conditions inside the reactor at any time, adjust the proportions of the media within the reactor, and ensure safe operation. Conceptually, this is a piece of equipment used in industry for conducting chemical reactions under high pressure; some models come equipped with stirring or heat-transfer devices and are thus also called pressurized reactors. Basic Structure and Principle: 1. The reactor body and lid are fabricated from 1Cr18Ni9Ti stainless steel. The reactor body is connected to the flange via threads, while the reactor lid is a flat, solid-type cover. The two components are joined together by evenly distributed main bolts arranged circumferentially.