Acids; aromatic polycarboxylic acids; terephthalic acid and its salts

HS v2022 Code: 291736

About acids; aromatic polycarboxylic acids; terephthalic acid and its salts

HS code 291736 covers a group of aromatic polycarboxylic acids, with terephthalic acid and its salts being the most prominent. These chemicals play a crucial role in the production of various consumer and industrial goods, making them an essential part of the global supply chain. They are widely used in the manufacturing of plastics, textiles, and other materials, contributing significantly to the broader chemical industry and the overall economy.

Production process

Terephthalic acid and its salts are typically produced through the oxidation of p-xylene, a petrochemical feedstock. The process involves several steps, including the initial oxidation, purification, and crystallization of the final product. Advanced catalysts and reaction conditions are employed to ensure high yields and product quality, while adhering to strict environmental regulations.

Production inputs

The primary raw material for the production of terephthalic acid and its salts is p-xylene, which is derived from crude oil or natural gas processing. Additionally, the industry requires a range of specialized equipment, such as reactors, distillation columns, and crystallization units, as well as utilities like steam, electricity, and cooling water to support the manufacturing process.

Production outputs

The main output of HS code 291736 is terephthalic acid and its salts, which are then used as key intermediates in the production of 392010 (polyethylene terephthalate (PET)) and other polyester-based materials. These materials find applications in a wide range of industries, including 392020 plastics, 540233 textiles, and 870321 automotive components.

Revisions to 291736

Classification codes are adjusted frequently. The code may have been revised or replaced between system versions. The table below shows the history (newest to oldest) of the code 291736. The most recent 1 version of this code (291736) is in the HS v2022 system (this version):

This page shows the most recent version of code 291736.

Family tree for acids; aromatic polycarboxylic acids; terephthalic acid and its salts

    graph LR
    A["<a href='/classifications/hs/v2022/29'>29: Organic chemicals</a>"]
A --> B["<a href='/classifications/hs/v2022/2917'>2917: Acids; polycarboxylic acids, their anhydrides, halides, peroxides and peroxy-acids; their halogenated, sulphonated, nitrated or nitrosated derivatives</a>"]
B --> C["<a href='/classifications/hs/v2022/291736'>291736: Acids; aromatic polycarboxylic acids; terephthalic acid and its salts</a>"]

    B --> D["<a href='/classifications/hs/v2022/291711'>291711: Acids; acyclic polycarboxylic acids; oxalic acid, its salts and esters</a>"]
B --> E["<a href='/classifications/hs/v2022/291712'>291712: Acids; acyclic polycarboxylic acids; adipic acid, its salts and esters</a>"]
B --> F["<a href='/classifications/hs/v2022/291713'>291713: Acids; acyclic polycarboxylic acids; azelaic acid, sebacic acid, their salts and esters</a>"]
B --> G["<a href='/classifications/hs/v2022/291714'>291714: Acids; acyclic polycarboxylic acids; maleic anhydride</a>"]
B --> H["<a href='/classifications/hs/v2022/291719'>291719: Acids; acyclic polycarboxylic acids; n.e.c. in item no. 2917.1</a>"]
B --> I["<a href='/classifications/hs/v2022/291720'>291720: Acids; cyclanic, cyclenic or cycloterpenic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and derivatives</a>"]
B --> J["<a href='/classifications/hs/v2022/291732'>291732: Acids; aromatic polycarboxylic acids; dioctyl orthophthalates</a>"]
B --> K["<a href='/classifications/hs/v2022/291733'>291733: Acids; aromatic polycarboxylic acids; dinonyl or didecyl orthophthalates</a>"]
B --> L["<a href='/classifications/hs/v2022/291734'>291734: Acids; aromatic polycarboxylic acids; other esters of orthophthalic acids</a>"]
B --> M["<a href='/classifications/hs/v2022/291735'>291735: Acids; aromatic polycarboxylic acids; phthalic anhydride</a>"]
B --> N["<a href='/classifications/hs/v2022/291737'>291737: Acids; aromatic polycarboxylic acids; dimethyl terephthalate</a>"]
B --> O["<a href='/classifications/hs/v2022/291739'>291739: Acids; aromatic polycarboxylic acids; n.e.c. in item no. 2917.3</a>"]

    

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