FIELD: chemistry.
SUBSTANCE: invention relates to production of a low-viscosity sodium salt of carboxymethyl cellulose, which is used as an agent for stabilising drilling mud in oil and gas extraction. Crushed cellulose is treated in a reactor with NaOH solution in the presence of a reaction mixture of arabinogalactan. The obtained alkaline cellulose is treated with monochloroacetic acid, a sodium salt thereof or a mixture thereof, to obtain carboxymethyl cellulose, which is unloaded, dried and crushed.
EFFECT: method simplifies the process of producing carboxymethyl cellulose, reduces alkali consumption and enables to control the degree of substitution and viscosity without changing process conditions.
3 cl, 1 tbl, 6 ex
| Title | Year | Author | Number |
|---|---|---|---|
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|
RU2307128C2 |
