Method of granulation by spraying melted nicotinamide

A technology of spray granulation and nicotinamide, which is applied in liquid droplet granulation, organic chemistry, etc., can solve problems such as physical injury of workers, easy moisture absorption of nicotinamide, and dust pollution in workshops, and achieves reduction of screening load, particle size reduction, etc. Good diameter distribution and the effect of reducing energy consumption

CN101569840AInactive Publication Date: 2009-11-04HANGZHOU SHENGDA PHARMA

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Patent Information

Authority / Receiving Office: CN · China
Current Assignee / Owner: HANGZHOU SHENGDA PHARMA
Publication Date: 2009-11-04
Estimated Expiration: Not applicable · inactive patent

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Abstract

The invention discloses a method of granulation by spraying melted nicotinamide. The method comprises the following steps: injecting the melted nicotinamide into the spray-granulation tower of a fluidized bed for granulation by a pressure-type spraying nozzle; automatically grading the nicotinamide granules with the granularity being 0.4 to 1.0 mm in the granulation tower by controlling the gas velocity of fluidizing air in the inlet pipe at the lower part of the granulation tower; entering silos through the inlet pipe of the granulation tower of the fluidized bed, and then screening the products within the range of the granularity by a screener; and finally obtaining the nicotinamide granules with the granule size being 0.4 to 1.0 mm. On the one hand, the granular nicotinamide produced by the method of the invention can greatly reduce the dust pollution, moisture absorption and agglomeration occurring to places for packaging, storing, transporting and applying, and on the other hand, the granule sizes of the products are properly distributed so as to ensure the good dispersion of nicotinamide in the following downstream products, such as feed and the like, upon the premise that the following processing technique, such as feed and the like, remains unchanged.

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Description

technical field

[0001] The invention provides a method for melt-spray granulation of nicotinamide, which belongs to the field of fine chemical industry. Background technique

[0002] Nicotinamide (Nicotinamide) is vitamin B3, chemical name 3-pyridine carboxamide, molecular formula C 6 h 6 N 2 O, molecular weight 122.11, melting point 129-131°C, white crystalline powder, easily soluble in water or ethanol. Niacinamide is widely used in medicine, food, and feed industries, and is an indispensable nutrient for the growth and development of humans and animals. In addition, nicotinamide can also be used as plant growth regulator, hair growth promoter, hair dyeing promoter, polymer stabilizer, electroplating solution additive and biochemical reagent, etc.

[0003] At present, the production methods of industrial nicotinamide at home and abroad mainly use 3-picoline, 2-methyl-5-ethylpyridine or quinoline as raw materials, and generate nicotinic acid or nicotinic acid through di...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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