Acids; acyclic polycarboxylic acids; maleic anhydride

HS v2022 Code: 291714

About acids; acyclic polycarboxylic acids; maleic anhydride

HS code 291714 covers a range of acyclic polycarboxylic acids, including maleic anhydride. These chemicals are essential building blocks for a diverse array of industries, from plastics and resins to pharmaceuticals and agricultural products. As a key component in the production of various industrial and consumer goods, the acyclic polycarboxylic acids industry plays a vital role in the global economy.

Production process

The primary production method for acyclic polycarboxylic acids, such as maleic anhydride, involves the oxidation of n-butane or benzene. This process typically takes place in a fixed-bed reactor, where the hydrocarbon feedstock is combined with air and catalysts to facilitate the oxidation reaction. The resulting maleic anhydride is then purified and prepared for further processing or distribution.

Production inputs

The main inputs required for the production of acyclic polycarboxylic acids include n-butane or benzene as the hydrocarbon feedstock, as well as various catalysts and oxidizing agents. Additionally, the industry relies on specialized equipment, such as fixed-bed reactors, distillation columns, and storage tanks, to facilitate the production and purification processes.

Production outputs

The primary output of HS code 291714 is maleic anhydride, which is widely used in the production of 390512 polyvinyl butyral, 390599 other polyvinyl esters, and 291735 unsaturated acyclic monocarboxylic acids. Maleic anhydride is also a key ingredient in the manufacture of 291819 other polycarboxylic acids, 390730 unsaturated polyesters, and various agricultural chemicals.

Revisions to 291714

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 291714. The most recent 1 version of this code (291714) is in the HS v2022 system (this version):

This page shows the most recent version of code 291714.

Family tree for acids; acyclic polycarboxylic acids; maleic anhydride

    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/v2022/291714'>291714: Acids; acyclic polycarboxylic acids; maleic anhydride</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/v2022/291719'>291719: Acids; acyclic polycarboxylic acids; n.e.c. in item no. 2917.1</a>"]
B --> H["<a href='/classifications/hs/v2022/291720'>291720: Acids; cyclanic, cyclenic or cycloterpenic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and derivatives</a>"]
B --> I["<a href='/classifications/hs/v2022/291732'>291732: Acids; aromatic polycarboxylic acids; dioctyl orthophthalates</a>"]
B --> J["<a href='/classifications/hs/v2022/291733'>291733: Acids; aromatic polycarboxylic acids; dinonyl or didecyl orthophthalates</a>"]
B --> K["<a href='/classifications/hs/v2022/291734'>291734: Acids; aromatic polycarboxylic acids; other esters of orthophthalic acids</a>"]
B --> L["<a href='/classifications/hs/v2022/291735'>291735: Acids; aromatic polycarboxylic acids; phthalic anhydride</a>"]
B --> M["<a href='/classifications/hs/v2022/291736'>291736: Acids; aromatic polycarboxylic acids; terephthalic acid and its salts</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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