Description
We, Wuhan Xinyingda Chemicals Co., lTd, specialized in producing
lignosulphonate series, which have been widely accepted by
worldwide customers. How many kinds of lignosulphonates does WUHAN
XINYINGDA CHEMICALS CO.,LTD SUPPLY? What is lignosulphonate? 1. We
XYD CHEM supply sodium lignosulphonate, calcium lignosulphonate,
ammonium lignosulfonate, magnesium ligno sulphonate. 2.
Lignosulphonate, or lignosulfonate, or sulfonated lignin, (CAS No.
********6) are water-soluble anionic polyelectrolyte polymers: they
are byproducts from the production of wood pulp using sulfite
pulping. Most delignification in sulfite pulping involves acidic
cleavage of ether bonds, which connect many of the constituents of
lignin. The following structures do not specify the structure since
lignin and its derivatives are complex mixtures: the purpose is to
give a general idea of the structure of lignosulphonates. The
groups labeled "Q" can be a wide variety of groups found in the
structure of lignin. Sulfonation occurs on the side chains, not on
the aromatic rings, like in p-toluenesulfonic acid. Sodium
lignosulphonate or calcium lignosulphonate have very broad ranges
of molecular mass (they are very polydisperse). A range of from
***0–**0,**0 da has been reported for softwood lignosulphonates
with lower values reported for hardwoods. Sodium Lignosulphonates,
calcium lignosulphonate, megnesium lignosulphonate and ammonium
lignosulphonates are recovered from the spent pulping liquids (red
or brown liquor) from sulfite pulping. The most widely used
industrial process is the Howard process, in which *0–*5% yields of
calcium lignosulfonates (CAS number *******3), are precipitated by
adding of excess calcium hydroxide. Ultrafiltration and
ion-exchange can also be used to separate lignosulfonates from the
spent pulping liquid. A list of CAS numbers for the various metal
salts of lignosulfonate is available. Lignosulfonates have a wide
variety of applications.The single largest use for lignosulfonates
is as plasticizers in making concrete, where they allow concrete to
be made with less water (giving stronger concrete) while
maintaining the ability of the concrete to flow. Lignosulfonates
are also used during the production of cement, where they act as
grinding aids in the cement mill and as a rawmix slurry
deflocculant (that reduces the viscosity of the slurry).
Lignosulfonates are also used for the production of plasterboard to
reduce the amount of water required to make the stucco flow and
form the layer between two sheets of paper. The reduction in water
content allows lower kiln temperatures to dry the plasterboard,
saving energy. The ability of lignosulfonates to reduce the
viscosity of mineral slurries is used to advantage in oil drilling
mud, where it replaced tannic acids from quebracho (a tropical
tree).Lignosulfonates are used to disperse pesticides, dyes, carbon
black, and other insoluble solids and liquids into water. They are
used in tanning leather. They are also used to suppress dust on
unpaved roads.Dimethyl sulfide and dimethyl sulfoxide (an important
organic solvent) are produced from lignosulfonates.
