Methyl heptol desulfurizing process

A technology of methylheptanol and sulfide, applied in the field of methylheptanol removal of sulfide, can solve the problems of product quality not up to standard, high production cost, low yield, etc., to avoid catalyst poisoning, ensure normal operation, The effect of reducing production costs

Inactive Publication Date: 2006-08-02
邵阳市化工研究所
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Problems solved by technology

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

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  • Methyl heptol desulfurizing process
  • Methyl heptol desulfurizing process

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Embodiment Construction

[0011] Such as figure 1 As shown, 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 by pump 3, and the methylheptanol in the high-level storage tank flows into the tower from the bottom of the tower and passes through the desulfurizer layer. Afterwards, it flows into the ammonolysis section methyl-heptanol storage tank through valve 4 from the tower top overflow pipe for subsequent use, and the outlet flow is controlled so that the methyl-heptanol containing sulfide is less than 2PPm.

[0012] Comparison table of ammonolysis reaction of methylheptanol to remove sulfide and unremoved sulfide (average number of...

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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 raw material, after simple distillation to remove water, in [0003] N.N-di-(1-methylheptyl) acetamide is produced by N.N. [0004] The specific chemical reaction formula is as follows: [0005] [0006] 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 preparation of N.N-bis-(1-methylheptyl)acetamide process, the yield is low, the production cost is high, and the product quality cannot reach S...

Claims

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Application Information

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Patent Type & Authority Applications(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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