As an MMA Plant, share with you.
The main methods for preparing acrylic esters are: direct alkyd
esterification, acid chloride esterification, and transesterification. By
reacting methyl methacrylate with different alcohols, corresponding acrylates
and methanol can be obtained. Through transesterification, DMAEMA, BMA,
2-ethylhexyl methacrylate, etc. can be used.
MMA Plant
The catalyst used in the transesterification method is traditionally mainly
an inorganic acid, an organic acid or an acid salt thereof, and the advantage is
that the price is relatively cheap. However, they are highly corrosive and have
strict requirements on equipment, equipment and operating conditions. And the
reaction time is long, the side reactions are many, the three wastes are
serious, and the color of the product is easy to darken. Such catalysts will be
phased out in the transesterification process. Non-acid catalysts are a new
direction for development in recent years. Its main features are no corrosion,
good product quality, light color, few side reactions, and mild reaction
conditions. Organotin compounds, titanic acid compounds and alkali metal alkoxy
compounds are ideal catalysts for transesterification. As long as the problem of
recycling and reuse is solved, they will be widely used in future industrial
production.
Environmental impact
Hazardous characteristics: flammable, its vapor can form explosive mixture
with air, and it will cause fire and explosion when exposed to fire and high
heat. Under the action of heat, light and ultraviolet light, polymerization is
easy to occur, and the viscosity gradually increases. In severe cases, all
monomers in the entire container may undergo irregular explosive polymerization.
Its vapor is heavier than air and can spread to a relatively low place at a
lower place. It will ignite when it comes to a fire source.
Hazardous combustion products: carbon monoxide, carbon dioxide.
Fire extinguishing methods: Firefighters must wear full-body fire and gas
protective clothing and extinguish the fire in the upwind direction. In the
event of a fire, firefighters must operate in a protective shelter. Fire
extinguishing agent: solvent-resistant foam, carbon dioxide, dry powder, sand.
Water extinguishing is not effective, but water can be used to keep the
containers in the fire area cool.
Emergency treatment: Quickly evacuate personnel from the leaked contaminated
area to a safe area and isolate them to strictly restrict access. Cut off the
fire. It is recommended that emergency handlers wear self-contained
positive-pressure respirators and antistatic work clothes. Cut off the source of
the leak if possible. Prevent from flowing into restricted spaces such as sewers
and flood drains. Small leaks: Absorb with sand, vermiculite or other inert
materials. Or brush with an emulsion made of a non-combustible dispersant, and
dilute the lotion into a waste water system. Large spills: build dikes or dig
pits for containment. Cover with foam to reduce steam disaster. Spray water or
foam cools and dilutes steam to protect field personnel. Use explosion-proof
pump to transfer to tanker or special collector, recycle or transport to waste
disposal place for disposal.
Our company can also provide MMA Purification Plant, welcome to consult.
