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Method for preparing n-butyl thiophosphoric triamide and integrated device thereof

A technology of n-butyl thiophosphoric triamide and integrated device, which is applied in the field of preparing n-butyl thiophosphoric triamide and its integrated device, and can solve the problems of poor production stability and continuity, manual operation, and high unit cost. problems, to achieve product stability, good production continuity, complete production response, and unit cost savings

Pending Publication Date: 2020-05-12
安徽中枨信息科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the defects in the production and preparation of n-butylthiophosphoric triamide (NBPT) at home and abroad are incomplete process reaction, poor production stability and continuity, high unit cost, manual operation, and poor safety performance

Method used

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  • Method for preparing n-butyl thiophosphoric triamide and integrated device thereof
  • Method for preparing n-butyl thiophosphoric triamide and integrated device thereof
  • Method for preparing n-butyl thiophosphoric triamide and integrated device thereof

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] in the attached figure 1Among them, a method for preparing n-butyl thiophosphoric triamide and its integrated device, including core equipment batching kettle 35, n-butyl kettle 37, and ammonia-through kettle 46, one of the core equipment batching kettle 35 is a cylinder outside the equipment shape, the inner wall of the barrel is equipped with a batching kettle jacket 13, which is also a hollow cylinder shape, and the top of the batching kettle 35 is equipped with a batching kettle nitrogen inlet pipe 9, a batching kettle feed pipe 20, and an n-butylamine elevated tank outlet pipe 22, The batching kettle nitrogen inlet pipe 9 at the top of the batching kettle 35 is connected with the nitrogen buffer tank 10 through the nitrogen outlet three-way valve 11, and the batching kettle feed pipe 20 at the top of the batching kettle 35 passes th...

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Abstract

The invention discloses a method for preparing n-butyl thiophosphoric triamide and an integrated device of the n-butyl thiophosphoric triamide and belongs to the technical field of production of efficient green slow-release fertilizer synergists, liquid crystal intermediates and medical intermediates. The method mainly comprises the following steps: carrying out a reaction between thiophosphoryl chloride and n-butylamine to generate N-n-butyl thiophosphoryl dichloride; and carrying out a reaction between N-n-butyl thiophosphoryl dichloride with liquid ammonia to generate a target product, namely n-butyl thiophosphoric triamide. The invention specifically relates to a method and a device for preparing thiophosphoryl chloride. The core content and the technical scheme are as follows: a novelammoniation production process flow is adopted on the basis of the existing method for preparing the n-butyl thiophosphoric triamide; a liquid ammonia introduction and restriction orifice plate is added, so that the flow of ammonia introduced into an ammonia introduction kettle is effectively controlled; as a liquid ammonia metering tank is added, the mass of ammonia introduced into the ammonia introduction kettle is effectively controlled; since a batching kettle is added, materials in the batching kettle are pre-cooled, the reaction temperature in a n-butyl kettle is effectively controlled,and the purposes of complete process reaction, good product stability and low unit cost are achieved.

Description

technical field [0001] The invention belongs to the technical field of producing high-efficiency green slow-release fertilizer synergists, liquid crystal intermediates, and pharmaceutical intermediates, and specifically relates to a method for preparing n-butylthiophosphoric triamide and an integrated device thereof. Background technique [0002] At present, the defects in the production and preparation of n-butylthiophosphoric triamide (NBPT) at home and abroad are incomplete process reaction, poor production stability and continuity, high unit cost, manual operation, and poor safety performance. Contents of the invention [0003] The technical problem to be solved by the present invention is: aiming at the problems existing in the background technology, a method for preparing n-butylthiophosphoric triamide and its integrated device are provided. The core content and technical scheme are prepared in the existing On the basis of the method of n-butylthiophosphoric triamide...

Claims

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Application Information

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IPC IPC(8): C07F9/22
CPCC07F9/224
Inventor 何朝金何凡何章倩
Owner 安徽中枨信息科技有限公司
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