acid sulfite pulp

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• Sulfite process — The sulfite process produces wood pulp which is almost pure cellulose fibers by using various salts of sulfurous acid to extract the lignin from wood chips in large pressure vessels called digesters. The salts used in the pulping process are… …   Wikipedia

• Pulp (paper) — Fibres in wood pulp Pulp is a lignocellulosic fibrous material prepared by chemically or mechanically separating cellulose fibres from wood, fibre crops or waste paper. Wood pulp is the most common raw material in papermaking. Contents …   Wikipedia

• sulfite process — Chem. a process for making wood pulp by digesting wood chips in an acid liquor consisting of sulfurous acid and a salt, usually calcium bisulfite. [1900 05] * * * ▪ wood industry sulfite also spelled  Sulphite,         chemical process for the… …   Universalium

• sulfite process — noun : an acid process for making pulp from wood in which chips are cooked at high temperature and pressure in a solution of bisulfite of calcium, magnesium, sodium, or ammonium * * * Chem. a process for making wood pulp by digesting wood chips… …   Useful english dictionary

• Wood pulp — is a dry fibrous material prepared by chemically or mechanically separating the fibers which make up wood. Pulp can be either fluffy or formed into thick sheets. The latter form is used if the pulp must be transported from the pulp mill to a… …   Wikipedia

• Bleaching of wood pulp — is the chemical processing carried out on various types of wood pulp to decrease the color of the pulp, so that it becomes whiter. The main use of wood pulp is to make paper where whiteness (similar to but not exactly the same as brightness ) is… …   Wikipedia

• Dissolving pulp — (also called dissolving cellulose) is a bleached wood pulp that has a high cellulose content (> 90%). It is produced chemically from the pulpwood, in a process that has a low yield (30 35% of the wood). This pulp has special properties, such… …   Wikipedia

• Wood-pulp paper — is paper made from wood pulp, which is produced from trees by a variety of mechanical and chemical processes. Paper made from wood pulp ranges from toilet paper (obviously a single use product) to newsprint (meant to be used once then recycled),… …   Wikipedia

• Sodium sulfite — anhydrous …   Wikipedia

• Calcium sulfite —   A white powder, soluble in diluted sulfuric acid. Used in the sulfite process for the manufacture of wood pulp.   U.S. Dept. of Energy, Energy Information Administration s Energy Glossary …   Energy terms

• papermaking — [pā′pər māk΄iŋ] n. the making of paper papermaker n. * * * pa·per·mak·ing (pāʹpər mā kĭng) n. The process or craft of making paper.   paʹper·mak er n. * * * Introduction       formation of a matted or felted sheet, usually of cellulose fibres,… …   Universalium