A method for producing wax medium for thermostat with f-t synthetic product

Abstract

The invention discloses a method for producing a wax medium for a thermostat from products synthesized by F-T. The method comprises the following steps: products synthesized by F-T whose weight percentage of n-alkanes is 85% or above are used as raw materials, and hydro-conversion is carried out under the effects of a catalyst; distillation is carried out for hydrogenated products in order to prepare components of proper distillation ranges; sweating is carried out in order to produce the target product. The method is based on common sweating process, in a sweating process, air-flow passes through a wax layer for carrying liquid state components, separating effect of solid components and liquid components is enhanced and separating speed is accelerated; at the same time, gas generated by decomposition of inorganic salt forms micro spaces in the wax layer for facilitating rapid discharge of liquid components. The method has the advantages of low production equipment investment, simple production process, low operation cost, safety, energy saving without solvent pollution, and the like; the product has a narrow temperature control range, and can be applied to wax temperature control valves, especially the wax type medium for the thermostat.

Description

technical field [0001] The invention belongs to the technical field of special wax production, in particular to a method for producing a wax medium for a thermostat with an F-T synthetic product. Background technique [0002] The wax temperature control valve uses wax as the medium for sensing temperature changes. When the ambient temperature changes, the volume of the wax will change, and then control the valve opening, thereby adjusting the flow rate and achieving the purpose of adjusting and controlling the temperature. The wax substance used in wax temperature control valve is called wax medium. Wax temperature control valve has many advantages and is widely used. [0003] The thermostat, also known as the thermostat, is used to automatically adjust the amount of water entering the radiator according to the temperature of the cooling water, change the water circulation range, and adjust the heat dissipation capacity of the cooling system to ensure that the engine works ...

AI Technical Summary

Problems solved by technology

[0018] Compared with the solvent separation process, the sweating separation process is an intermittent operation, and the product yield is lower and the production cycle is longer, but the sweating process has the advantages of less investment, simple production process, low operating cost, safe production process, energy saving and no environmental impact. Pollution and other advantages, some manufacturers are still using this method to produce soap wax products

[0019] Over the years, the sweating method has been developed in terms of production equipment and technology, such as CN89214332 (vertical square multi-section sweating tank), CN94223980.6 (dish-type sweating device), CN98233254.8 (paraffin sweating tank), CN200920033500. X (new paraffin sweating tank), CN201210508905.0 (a high-efficiency paraffin sweating device), CN201320127680.4 (tubular paraffin deoiling device), etc., have made improvements in sweating production equipment; CN91206202 (a high-efficiency paraffin sweating tank ) has made improvements in the sweating process, but these improvements still cannot produce wax media for thermostats with a melting point of about 70 °C

[0020] The means of producing wax medium in the prior art, there are solvent methods, such as: DD 241,829, SU 1,084,289, RU 2,009,171, US 5,223,122 and other patents, the production methods introduced by these patents pollute the environment

[0021] The means of producing wax medium in the prior art also have (multi-stage) sweating or (distillation method) combined sweating, such as: CN02109670.8 (waxy temperature medium for shower automatic thermostat valve), CN02109668.6 (heating control Wax medium for temperature control valve and its preparation method), CN200310104909.3 (a wax temperature-sensitive medium for temperature control valve and its preparation method), etc., the melting points of the target products of these patents are all below 50°C; CN201110353409.8 ( A preparation method of waxy temperature medium for temperature control valve), CN201110353410.0 (a preparation method of thermal induction wax medium for automatic thickening valve of motorcycle), CN02109670.8 (waxy temperature medium for shower automatic temperature control valve) medium), etc. The target product of these patents has a melting point below 50°C and a wide temperature control range, so it is not suitable for use as a wax medium for thermostats

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