Adhesive production process

Red Bamboo ammonium sulfite method with NaOH solution to adjust the pH 8-9, by formaldehyde: red liquid solid (mass ratio) -1.10 added formaldehyde, heated to 50 ℃ and incubated 10 to 15min, discharge, placing a stamp -2 days Serve.

Because formaldehyde pH value of 3.15, so that after the red was added formaldehyde having a pH value rapidly decreased from the original 8.5 to 3.3. Decreased pH value but also because of formaldehyde with red liquid remaining in the (NH4) 2SO3 (gross reaction, caused by the release of N Play, by the following formula: the process of making adhesive

Seen in this light, the red liquid (NH4) 2SO3 presence of formaldehyde consumed, while the solution pH value decreased, the reaction of formaldehyde and lignin difficult.

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