Top quality
No matter which derivative you produce - whether methyl, micro or carboxymethyl cellulose or others. For filtration and washing, our filters offer you comprehensive advantages compared to other technologies. The highest product quality, maximum yield and efficient use of resources are the hallmarks of our machines in use.
Filtration
Efficient separation of salt
For cellulose derivatives – especially those that are soluble in water – the rotary pressure filter (type RPF) proves to be superior to classic alternatives such as centrifuges. The rotary pressure filter enables cake treatment in several separate steps in one machine. The machine is compact and the temperature range can be set precisely. Filtration and washing take place without the products gelling – with solids-free filtrate and particularly high yield.
After separation of the mother liquor and filter cake, a multi-stage displacement wash takes place. The filter cake can be efficiently freed from salt. With its perfect piston flow, the rotary pressure filter offers effective penetration by the detergent. This means that only minimal quantities of detergent and water are required - while at the same time the process meets the highest quality standards.
Minimal solvent consumption
Our filters also ensure the highest product quality and efficiency in the filtration process for cellulose derivatives that are produced in solvents. In addition to the rotary pressure filter, our indexing belt filter (BF) is also used in the production of cellulose derivatives. Our aim in every application is to achieve the optimum ratio of detergent concentration and filter size, thus enabling the reliable production of high-purity derivatives with minimum solvent consumption.
Rotary pressure filter (RPF)
View into the drum of the Rotary pressure fitter (RPF)
Mixing & Reacting
Production of cellulose ethers
Horizontal reactor
Production of cellulose ethers
The complete cellulose etherification reaction takes place in a horizontal reactor. Etherification by adding monochloroacetic acid (MCA), dimethyl ether (DME) and other additives is an exothermic reaction, resulting in process pressures of up to 40 bar. Solvents are recovered in the same reactor under vacuum. The heatable and coolable BHS horizontal reactors (HTC-R) are used for this purpose.
Homogenizing of cellulose ethers
Vertical mixer
Homogenizing of cellulose ethers
Several batches of cellulose ether are collected in a BHS vertical mixer (HVW) and homogenized together with other additives (small components) in a short mixing time. The result is a consistently high batch quality without fluctuations in the end product.
Granulation/Cooling of Modified Celluloses
Ring layer mixer
Granulation/Cooling of Modified Celluloses
BHS Horizontal mixers (HTK-T) and ring layer mixers (HRM) are ideally suited for granulating and cooling cellulose ethers. The high peripheral mixing speeds of the ring layer mixer HRM make it possible to increase the particle size for the subsequent process stages with a dwell time of just a few seconds. Compact machines achieve high throughputs in this production step.
Our machines in use
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