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Methyl heptol desulfurizing process

A technology of methylheptanol and sulfide, applied in the field of methylheptanol to remove sulfide, can solve the problems of product quality not up to standard, low yield, high production cost, etc., to avoid catalyst poisoning, reduce production cost, and produce Yield-enhancing effect

Inactive Publication Date: 2009-06-03
邵阳市化工研究所
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Problems solved by technology

Because the existence of sulfide in methylheptanol causes the poisoning of the Raney nickel catalyst used in the ammonolysis reaction in the preparation of N.N-bis-(1-methylheptyl)acetamide, the yield is low, the production cost is high, and the product quality cannot reach standard, which cannot even be prepared

Method used

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  • Methyl heptol desulfurizing process
  • Methyl heptol desulfurizing process

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Embodiment Construction

[0010] As shown in Figure 1, the main equipment for the removal of sulfide from methylheptanol is the self-designed sulfide removal tower 1, which is cylindrical, with round platforms at both ends, 5-9 meters high, and a built-in 3.5-6 meters high SN-3 type activated carbon desulfurizer layer 2 (produced by Shanghai Research Institute of Chemical Industry), the methylheptanol after distilling and removing water is sent to the high-level storage tank with the pump 3, and the methylheptanol in the high-level storage tank flows into the tower from the bottom of the tower, and passes through After the desulfurizer layer, the overflow pipe from the top of the tower flows into the methylheptanol storage tank of the ammonolysis section through the valve 4 for standby, and the outlet flow is controlled so that the methylheptanol contains less than 2PPm of sulfide.

[0011] Comparison table of ammonolysis reaction of methylheptanol to remove sulfide and unremoved sulfide (average number...

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Abstract

The present invention relates to chemical technology, and is especially methyl heptol desulfurizing process. At normal temperature and normal pressure, methyl heptol is countercurrent input into a desulfurizing tower filled with SN-3 type active carbon to eliminate sulfide and to reach the sulfide content below 2 ppm. The process can provide the subsequent step with high purity material to reduce catalyst poisoning, raise product yield and raise production efficiency.

Description

Technical field: [0001] The invention belongs to the chemical industry field and relates to a method for removing sulfides with methylheptanol. Background technique: [0002] The method for preparing N.N-bis-(1-methylheptyl)acetamide is to use the by-product methylheptanol of sebacic acid ricinoleic acid cracking section As a raw material, after simple distillation to remove water, under the catalysis of Raney nickel catalyst, it is hydrogenated and ammolyzed into di-(1-methylheptyl)amine, and then acetylated with acetic anhydride, and the product N.N-bis- (1-methylheptyl)acetamide. [0003] The specific chemical reaction formula is as follows: [0004] [0005] Since sebacic acid manufacturers use cresol or cresol containing sulfides (mercaptans, thioethers, etc.) Residue in methyl heptanol, the sulfide content is 25-50PPm. Because the existence of sulfide in methylheptanol causes the poisoning of the Raney nickel catalyst used in the ammonolysis reaction in the pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/74C07C31/125
Inventor 周达人王尚德
Owner 邵阳市化工研究所
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