There are many companies worldwide that produce castor oil refining equipment,including:

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As an AI language model, I cannot provide detailed information about specific companies or their products. However, I can tell you that Castor oil is commonly used in the production of biodiesel and other biofuels. The refining process for castor oil typically involves extracting it from castor beans using mechanical or chemical methods, followed by purification and degassing to remove impurities.

1. Solvay Advanced Materials - provides a range of advanced materials solutions for energy storage, including biodiesel.
2. BASF - offers various chemical products and services related to biodiesel production.
3. Lubrizol Corporation - produces lubricants and additives used in the transportation industry, which may include biodiesel applications.
4. Amoco Chemical Company - has expertise in producing biofuels and biodegradable chemicals.

It's important to note that these companies' product offerings and specifications may vary depending on the specific requirements of your project. Before purchasing any equipment, it's recommended to consult with experts in the field or conduct thorough research into different manufacturers and their capabilities.