#kneader reactor

[sunkaier]

SUNKAIER Intermeshing Twin Shaft Kneader Reactor for high viscosity processing. Twin-Shaft Kneader Reactors offer even better mixing and kneading behavior, more effective self-cleaning properties and the more efficient renewal of boundary layers. These and many other features make the Twin-Shaft Kneader Reactor the best choice for processes such as:

Bulk polymerization

Polycondensation

Drying

Dissolving

Sublimation

and others

In a Twin-Shaft Kneader Reactor, the high-torque shafts are designed to rotate in either corotation or in counter-rotation. In both cases, the E type kneading elements on the shafts intermesh to generate intensive surface renewal and mixing. At the same time, shear rates remain low.

Typical specifications, as following:

Volume: 3 … 20´000 L

Operating pressure: 0.001 … 10.0 bar (a)

Operating temperature: -100 … +400 °C

Operation mode: Batch or Continuous

Installed Power: … 1.5 MW

Torque: … 500 kNm

Drive: Hydraulic drive units or electric motor with or without frequency converter

Shaft seal: Stuffing box or mechanical seal

Product wetted material: Carbon steel, Austenitic stainless steels, Duplex stainless steel, Ni-Cr-Mo Alloy, Titanium or other materials required in the process industry.

If you have any need of process equipment please contact me without hesitation, thanks.

Helena Xiao / Sales Manager

Email: helena@sunkaier.com

Phone: +86 510 8758 8707

Mobile: +8618261586225

[jctmachinery]

JCT Machinery on sale chemical mixing equipments

[advancechemicals]

AKD - Inevitable paper sizing

Alkyl ketene dimers (AKDs) are a family of organic compounds based on the 4-membered ring system of oxetan-2-one, which is also the central structural element of propiolactone and diketene. Attached to the oxetane ring of technically relevant alkyl ketene dimers there is a C12 – C16 alkyl group in the 3-position and a C13 – C17 alkylidene group in the 4-position.

The main application of alkylated ketene dimer is in the sizing of paper and cardboard, as well as in the hydrophobization of cellulose fibers. The products thus modified are distinguished by higher mechanical strengths and less penetration of water, inks, or printing inks.[1]

AKD’s feature hydrophobic alkyl groups extending from a beta-propiolactone ring. A specific example is derived from the dimerization of the ketene of stearic acid. This ketene is generated by pyrolysis of stearoyl chloride.[2] AKD’s react with the hydroxyl groups on the cellulose via an esterification reaction. The esterification is competitive with hydrolysis of the AKD. Prior to the development of AKD’s, hydrophobicity was imparted by incorporating rosin into the paper.

Related to AKDs, is alkenyl succinic anhydride which is another substitute used in sizing applications (ASA). As for AKDs, ASA reacts with hydroxy groups of the cellulose to form an ester, anchoring the hydrophobic group to the surface. ASA is prepared by thendne reaction of unsaturated hydrocarbons with maleic anhydride.

A continuous process in which long-chain carboxylic acid chloride and tertiary amine (e. g. dimethyl isopropylamine, dimethylcyclohexylamine or triethylamine) is supplied separately without solvents to a tube reactor, kneader or preferably a twin-screw extruder or planetary roller extruder and reacted at temperatures between 90 and 110 °C, delivers lactone contents of over 90% at short reaction times. Processing is carried out by phase separation or acidic extraction.[19]

Alkylated ketene dimers as paper sizing agents

The problems with the acidic (aluminum sulfate-mediated) mass sizing of paper with alkaline-digested colophony resins introduced since the early 19th century led beside the use of alkaline flocculants (such as chalk or calcium carbonate as the alkali reserve) to the search for alternative materials for sizing in a neutral or alkaline environment. In addition to the significantly more reactive alkenyl succinic anhydrides (which do also hydrolyze rapidly in the presence of water) alkylated ketene dimers were preferred surface and mass sizes in the paper industry from the 1960s onwards.

Industrially applied AKDs are derived from fatty acids with chain lengths between C14 (myristic acid) to C22 (behenic acid); palmityl (C16) diketene and stearyl (C18) ketene and mixtures thereof are preferably used, as well as fatty acid mixtures from the hydrolysis of animal and vegetable fats. Because of the chain length of the original fatty acids, AKD are waxy solids with melting points between 42oC and about 70 °C. Mixtures of alkylated ketene dimers and water are dispersions at temperatures below 40 °C or emulsions at temperatures above 45 °C. Liquid AKDs are widely used, they are based on unsaturated fatty acids like oleic acid or branched fatty acids, like iso-stearic acid.

Aqueous alkyl diketene dispersions generally contain 10-20 wt% of AKD, as well as active protective colloids (particularly polycations such as cationic starch, copolymers of N-vinylpyrrolidone and quaternized N-vinylimidazole, acylated polyethyleneimines or cationic high molecular weight polyacrylamides with an average molar mass up to 7 million g/mol) and other stabilizers (usually anionic surfactants, for example, lignin sulfonates or condensation products of naphthalene-sulfonic acid sodium salt and formaldehyde). Such stabilized AKD dispersions are active and stable at room temperature for up to three months and also tolerate the addition of different fillers for paper or cardboard (e.g. kaolin, chalk, talc, titanium dioxide, calcium sulfate, aluminum oxide, etc.) from 5 to 25%. The amounts of alkyl ketene dimers used for the sizing of paper and paper products are preferably in the range from 0.15 to 0.8 wt%, sometimes from 0.05 to 0.2 wt%, based on the dry paper stock.

Paper sizing with alkylated ketene dimers

For paper sizing with AKD, a three-step process was proposed which, despite controversial discussions in the 1990s, seems to describe the processes that are taking place.

Decisive criteria for the quality of the hydrophobicity of papers are

The retention of the AKD particles on the wet paper mass on the paper screen

The spreading of the AKD particles on the surface and the penetration in the paper mass

The chemical reaction of the hydroxyl groups of the cellulose (esterification) with the alkylated ketene dimers to form beta-ketocarboxylic esters.

The molecular structure (i.e., molar mass and cross-linking degree), the molar charge density of cationic groups, the exact dosage of the cationic polymer as a dispersion stabilizer and retention aid as well as keeping the other process parameters such as temperature, pH and residence times is crucial.

After removal of excess water – also to avoid hydrolysis of the AKD to the beta-keto acid and subsequent decarboxylation to the ketone – follows the cracking of the stabilized AKD particles on the base paper mass, the melting of the solid AKD wax (at approx. 90 °C), the spreading of the liquid AKD wax by surface diffusion on the cellulose fibers, and the formation of closed hydrophobic layers. The thickness of the hydrophobic layers depends on the AKD concentration in the dispersion.

Ad 3. The hydrophobization of cellulose fibers with alkylated ketene dimers takes place most effectively in neutral or preferably weakly alkaline media (pH 7.5-9.0). The reaction temperature is generally 90-110 °C, with approximately 40% of the AKD used reacting with the cellulose. After the reaction contact angles of >100° are measured, indicating the hydrophobic character of the AKD-modified model surfaces. The esterification of hydroxyl groups of cellulose fibers was also demonstrated by comparison reactions with 14C-labeled AKD.

The sizing with AKD is suitable for the permanent hydrophobization of newsprint, printing and writing paper and cardboard used as a container for liquids (including foodstuffs such as milk), as well as for the improvement of shape stability and runnability.

Commercial Production

At Advance Chemicals, undergoing robust testing frequently, the production of AKD is strictly under defined and controlled conditions thus giving out world call AKD for application in various grades of paper making.

[schmierstoffeonline-blog]

*Klüber Klüberfluid NH1 4-005*

Klüber Klüberfluid NH1 4-005 Is a synthetic barrier fluid for mechanical seals.

*Your benefits at a glance:*

– No build-up of deposits if the product is used according to the intended purpose in mechanical seals due to the advanced synthetic oil formulation – ISO 21469 certified – supports the compliance with the hygienic requirements in your production plant.

*Your requirements – our solution:*

Klüberfluid NH1 4-005 is based on a synthetic hydrocarbon oil and was developed for the lubrication of mechanical seals operating under various conditions in the chemical and pharmaceutical industries.

Klüberfluid NH1 4-005 is NSF H1 registered and therefore in compliance with FDA 21 CFR § 178.3570. The lubricant was developed for incidental contact with products and packaging materials in the food-processing, cosmetics, pharmaceutical or animal feed industries. The use of Klüberfluid NH1 4-005 can contribute to increase reliability of your production processes. Nevertheless it is recommended to conduct an additional risk analysis, e.g. HACCP.

*Application:*

Klüberfluid NH1 4-005 can be used as a barrier fluid in mechanical seals operating under inert gas conditions. Mechanical seals have been used in mixers, driers, mills, kneaders, reactors and pumps in the chemical and the pharmaceutical industry for many years.

Klüber Lubrication offers a range of oils that were especially developed for use as a barrier medium in mechanical seals. The more the seal is stressed in terms of pressure, speed and heat, the lower should the oil’s viscosity be. For naturally circulating barrier fluids, the selected oil viscosity is normally approx. 5 mm²/s, as is the case with Klüberfluid NH1 4-005.

Which type of barrier fluid should be chosen depends on the type of seal elastomer as well as on the application’s process conditions.

For forced circulation, the oil should have a viscosity of 12 – 90 mm²/s. Klüber Lubrication offers solutions also for these cases.

Our experts will be pleased to provide advice.

*Application notes:*

The recommendations of the mechanical seal manufacturer should be observed.

The stated service temperature range is based on an application under inert gas, as is normally the case with mechanical seals.

*Source URL:*  https://www.schmierstoffe-online.com/product/kluber-kluberfluid-nh1-4-005/

[jctsmily]

Jinchangtai Machine u0026 Equipment Co ,Ltd making reactor,kneader,plane...

[sunkaier]

Sunkaier SK3000S-Extruding Kneader Reactor

DESCRIPTION

SK3000S Kneader is ideally suited for operations involving mixing, kneading, reaction, polymerization, crystallization, compounding and heating or cooling of materials up to many million-centipoise viscosity.

SUNKAIER Kneader is a horizontal, twin screw, closed type continuous kneading/reacting processor. The Kneader has a number of recent successful accomplishments as continuous polymerization / reacting processor for engineering plastics and others. Compared to twin screw extruder, SK3000S Kneader has compact structure such as short L/D and low power while having equivalent kneading and dispersion performance and contributing to rationalization of manufacturing process and cost reduction.

SK3000S KNEADER COMBINATION

Maintaining, repairing, and servicing large extruders is crucial for ensuring optimal performance, prolonging the lifespan of the equipment, and minimizing downtime. Large extruders, such as the ones used in the production of polymers and other materials, often require specialized knowledge and tools.

PARTS FOR SK3000S KNEADER

SUNKAER reactive extruding kneader, specifically the SK3000S model, is designed to handle demanding processes that require precise and intensive mixing. The quality of the machine's components, especially the screw elements, is critical for achieving optimal performance and durability. Here's more information on the key aspects of the kneader's construction and the manufacturing process for its screw elements:

Key Components of SK3000S Reactive Extruding Kneader:

Screw Elements: The screw elements are the heart of the kneader, responsible for conveying, mixing, and reacting the materials. They are precision-machined to ensure high accuracy and reliability.

Barrel: The barrel is where the materials are processed. It is designed to withstand high temperatures and pressures. It is typically made from high-strength materials and may include heating/cooling jackets for temperature control.

Drive System: The drive system powers the rotation of the screw elements. It includes motors, gearboxes, and other components that are selected for their ability to handle the torque and speed requirements.

Controls: The kneader is equipped with sophisticated control systems to monitor and adjust process parameters such as temperature, pressure, and screw speed.

SK3000S JACKED REACTIVE EXTRUDER

The jacketed reactive extruder is an advanced piece of equipment used in polymer processing and chemical reactions where precise temperature control is essential. This type of extruder is designed with a jacket, which is a layer or casing around the barrel of the extruder that allows for heating or cooling media to be circulated through it. This feature provides better temperature control compared to non-jacketed extruders because it can manage the heat input more effectively during the extrusion process.

SPANDEX PROCESS KNEADERING REACTOR

SK3000E self-cleaning kneader reactor lab unit sounds like a specialized piece of equipment designed for use in laboratory settings, particularly for research and development purposes. This type of equipment is typically used for mixing, kneading, and reacting various materials under controlled conditions.

REACTIVE EXTRUSION KNEADER

SK3000S twin co-rotating reactive extruding kneader is a specialized piece of equipment designed for processing materials that require long residence times and intensive mixing. This type of machine is particularly useful for applications such as emulsion polymerization, where precise control over the mixing and residence time is crucial for achieving the desired product properties.

MODELS

If you have any need of equipment please contact me without hesitation, thanks.

Helena Xiao / Sales Manager

Email: helena@sunkaier.com

Phone: +86 510 8758 8707

Mobile: +8618261586225

[sunkaier]

Sunkaier SK3000 E-E Blade Kneader Reactor

DESCRIPTION

SK3000E-E Type Blade Intermeshing Kneader is a state-of-the-art mixing equipment designed to integrate multiple functions in a single machine for high-volume processing of high viscosity polymers and chemicals to mixing, shearing, evaporation, drying, crushing and crystallization.

The SK3000E-E Type Blade Intermeshing Kneader is a state-of-the-art mixing equipment designed to integrate multiple functions in a single machine for high-volume processing of high viscosity polymers and chemicals.

SPECIAL DESIGNED KNEADERING IMPELLER

SUNKAIER Special Designed Differential Co-Rotation Kneading Impeller is designed specifically for the efficient treatment of high-viscosity materials, including mixing, evaporation, drying, and polymerization processes.

APPLICABLE FOR PBAT CHAIN EXTENSION PROCESS

SK3000E, as part of the SUNKAIER line of equipment, is designed for applications involving high-viscosity materials and complex processing needs, such as chain extension in the production of polybutylene adipate terephthalate (PBAT). PBAT is a biodegradable and compostable polyester that is often used in applications requiring flexibility, such as film packaging and mulch films.

SOLVENT COUNTER WASHING APPLICATION

SK3000E, as part of the SUNKAIER line of equipment, is used for polymer gel crushing and washing. This process is typically involved in the post-polymerization treatment of materials, where the goal is to break down larger gel pieces into smaller particles and wash away impurities or residual solvents.

ADVANTAGES：

Effective Self-Cleaning prevent the formation of dead zones and accumulation of product, which can lead to degradation over time.

SK3000E provides superior kneading, mixing capabilities and better homogenization of the material.

SK3000E is designed to efficiently transfer heat to or from the material to ensures that the material is heated or cooled uniformly.

SK3000E promotes frequent renewal of the surface area of the material. this enhances the mixing and heat transfer processes, leading to more efficient processing.

SK3000E has a significant volume available for the release of vapors to facilitate the removal of volatiles and gas.

SK3000E LAB UNIT

SK3000E self-cleaning kneader reactor lab unit sounds like a specialized piece of equipment designed for use in laboratory settings, particularly for research and development purposes.

This type of equipment is typically used for mixing, kneading, and reacting various materials under controlled conditions.

APPLICATIONS:

Polymer Research: Studying the behavior of polymers under various conditions.

Chemical Synthesis: Developing new chemical processes or optimizing existing ones.

Material Science: Characterizing and developing new materials.

Pharmaceuticals: Formulation development and process optimization.

If you have any need of equipment please contact me without hesitation, thanks. Thanks & Regards

Helena Xiao / Sales Manager

Email: helena@sunkaier.com

Phone: +86 510 8758 8707

Mobile: +8618261586225

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[jctmachinery]

Reliable Machine Manufacturer: JCT Machinery

Equipments produced by JCT Machinery, production line designed by JCT Machinery, have many CE certificates and national patents.

[jctmachinery]

Certificates of JCT Machinery

JCT Machinery's equipments and production line have many CE certificates, patents. Some of the equipment exported to Europe has obtained EU certificates.

JCT Machinery chemical mixing equipments high quality • competitive price • nice pre-sale • after-sale service •

Please feel free to get to know us more, and contact us for machinery

Eng website🖱️https://www.jctmixingequipment.com/

Ru website🖱️https://www.jctmixing.com/

[jctsmily]

Do you know what to use to make neutral silicone sealant? 

 Neutral silicone sealant production have 5 parts: 

1)Base material production  

2)Base material grinding  

3)Glass/plastic production                      

4)Hydraulic discharge  

5)Product packing

But sometimes, if you have enough investment, you can buy a reactor to produce 107 plastic. 107 plastic is a original material of neutral silicone sealant production, which is  produce glue first step.

The first step: JCT can provides three choices (Vacuum kneader, Binders dispersing machine, Binders dispersed kettle). 

Second, provides two choices (Three roll mill or strong dispenser). 

Third, provides three choices(Powerful dispersing machine, Power mixer, Planetary mixer). 

Then, Hydraulic feeder.Final,  provides two choices (Hard tube filling machine or flexible packing machine)

Neutral silicone glue production line has sets of processes equipment in JCT. According to the requirements of the demand side, the production design of a    reasonable solution