Publication

Process for solids retention and accelerated dewatering in paper manufacture

Jutta Christine Wandrey
1988
Patents

Abstract

In the title process, which improves productivity and wastewater clarity, paper is prepd. from pulp slurries contg. 0.1-1.5% solids and 0.01-0.5% (based on solids) highly-branched, high-mol.-wt. copolymer of diallyldimethylammonium chloride (I) with 0.1-3.0 mol% crosslinking monomers. A slurry of 0.8% fibers (wastepaper) contg. 0.02% I copolymer with 0.1 mol% triallylmethylammonium chloride had dewatering time (250 mL filtrate) 5.1 s and gave a sheet contg. 97.5% solids, vs. 5.7 and 95.2, resp., with I homopolymer, and 6.5 and 93.1, resp., with no polymer. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/4bb9622a-1b7d-4ab4-8eff-d623eb767283

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Jutta Christine Wandrey
1988
Patents

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/4bb9622a-1b7d-4ab4-8eff-d623eb767283

About this result

Related concepts (32)

Polymer

A polymer (ˈpɒlᵻmər; Greek poly-, "many" + -mer, "part") is a substance or material consisting of very large molecules called macromolecules, composed of many repeating subunits. Due to their broad spectrum of properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life. Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA and proteins that are fundamental to biological structure and function.

Copolymer

In polymer chemistry, a copolymer is a polymer derived from more than one species of monomer. The polymerization of monomers into copolymers is called copolymerization. Copolymers obtained from the copolymerization of two monomer species are sometimes called bipolymers. Those obtained from three and four monomers are called terpolymers and quaterpolymers, respectively. Copolymers can be characterized by a variety of techniques such as NMR spectroscopy and size-exclusion chromatography to determine the molecular size, weight, properties, and composition of the material.

Polymer chemistry

Polymer chemistry is a sub-discipline of chemistry that focuses on the structures of chemicals, chemical synthesis, and chemical and physical properties of polymers and macromolecules. The principles and methods used within polymer chemistry are also applicable through a wide range of other chemistry sub-disciplines like organic chemistry, analytical chemistry, and physical chemistry. Many materials have polymeric structures, from fully inorganic metals and ceramics to DNA and other biological molecules.

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Process for solids retention and accelerated dewatering in paper manufacture

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