Cellulose ether manufacturing process

Application field

It is suitable for industrial enterprises that use cellulose as the main raw material to manufacture cellulose ethers, including sodium carboxymethyl cellulose, methylcellulose, and its derivatives, hydroxyethyl cellulose, etc.

  1.  Main production process: cellulose crushing, alkalization, etherification, gas recovery, precipitation, neutralization, washing, solid-liquid separation, stripping, filtration, drying, crushing, mixing and packaging, etc.
  2.  Main raw and auxiliary materials: main raw materials include refined cotton, kapok pulp, sodium hydroxide, propylene oxide/ethane, methyl chloride, chloroacetic acid, etc.; main auxiliary materials include toluene, ethanol, isopropanol, tert-butanol, methanol, acetone, glyoxal, acetic acid, nitric acid, hydrochloric acid, sodium hypochlorite, etc.
  3.  Main energy sources: natural gas, electricity, coal, liquefied petroleum gas, biomass fuel, purchased hot steam, etc.
Typical hydroxyethyl cellulose production process flow chart
Typical hydroxyethyl cellulose production process flow chart

Production and discharge of major pollutants

  1.  PM: mainly from crushing, dosing, drying, mixing, packaging, and other processes.
  2.  SO2, NOX: mainly from nitric acid storage tanks, metering tanks, boilers and hot blast stoves, and other processes.

  3.  VOCs: mainly from organic material storage, reaction, condensation, exhaust, washing, filtration, granulation, organic waste gas volatilization during drying, tail gas absorption process, incinerator discharge, and other processes.