Is the temperature rise in the crude benzene hydrogenation pre-reactor increasing?
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The total sulfur content in the raw materials is high, and the olefin content is roughly consistent with the normal levels; why then is the temperature rise in the pre-reactor greater?
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The main reactions involved in the pre-reactor are dienes, styrene, and carbon disulfide. A large temperature difference is not a problem; what matters is whether the bromine value of the product is high. On the other hand, it’s important to consider whether the inlet temperature is too high and whether the space velocity is too low