Cellulose ether process

Cellulose ether process means the following:
(1) A manufacturing process that includes the following process steps:
(i) Reaction of cellulose (e.g., wood pulp or cotton linters) with sodium hydroxide to produce alkali cellulose;
(ii) Reaction of the alkali cellulose with a chemical compound(s), such as ethylene oxide, propylene oxide, methyl chloride, or chloroacetic acid, to produce a particular cellulose ether;
(iii) Washing and purification of the cellulose ether; and
(iv) Drying of the cellulose ether.
(2) Solids handling steps downstream of the drying process are not considered part of the cellulose ether process.

Source

40 CFR § 63.5610

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Scoping language

For all affected sources complying with the batch process vent testing provisions in 63.490(c) and the operating limit provisions in 63.505(c), the terms used in this subpart and in subpart U of this part are defined in 63.482 and paragraph (g) of this section.

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