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lignosulphonic acid
lignosulphonic acid n.
Brit. 
/ˌlɪɡnə(ʊ)sʌlˌfɒnɪk ˈasɪd/
, /ˌlɪɡnə(ʊ)sʌlˌfɒnɪk ˈasɪd/U.S. /ˌlɪɡnoʊ(ˌ)səlˌfɑnɪk ˈæsəd/
any of various compounds in which sulphonic acid groups are attached to lignin molecules, formed in the sulphite process for producing wood pulp./ˌlɪɡnoʊ(ˌ)səlˌfɑnɪk ˈæsəd/Π
1908 Jrnl. Chem. Soc. 94 i. 717 In lignosulphonic acid, part of the sulphurous acid is tightly and part loosely bound.
1931 Canad. Jrnl. Res. 5 42 The first lignosulphonic acids studied were obtained by heating benzene-alcohol extracted spruce meal with sulphurous acid.
1967 Kirk-Othmer Encycl. Chem. Technol. (ed. 2) XII. 369 The sulfite process for producing pulp can lead to products which consist of lignosulfonic acids, or various lignosulfonates. These are commonly referred to in the trade as lignin sulfonic acids and lignin sulfonates.
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as lemmas
- semi-sporting
- semi-sports
- semi-square
- semi-stagnation
- semi-staminate
- semi-starvation
- semi-static
- semi-steel
- semi-sterile
- semi-sterility
- semi-stilt
- semi-stratified
- semi-striate
- semi-striated
- semi-stupor
- semi-sub
- semi-subjective
- semi-submersible
- semi-sum
- semi-supernatural
- semi-supinated
- semi-supination
- semi-sweet
- semi-synthetic
- semi-tact