A method of sweating and producing high-drop melting point microcrystalline wax
A technology of drop melting point and microcrystalline wax, which is applied in the refining of petroleum wax, can solve the problems of inability to produce high drop melting point microcrystalline wax products, and can not produce microcrystalline wax products, so as to achieve low operating costs, increase crystal size, The effect of simple production process
Active Publication Date: 2018-10-12
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0011] 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 and deoiling production equipment; CN91206202 (a high-efficiency paraffin wax Sweating tank) has made improvements in the sweating and deoiling process, but these improvements still cannot produce microcrystalline wax products that meet the relevant standards, let alone high-drop melting point microcrystalline wax products
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0052] This embodiment includes: (1) preparation work, (2) cooling - high temperature constant temperature - cooling - low temperature constant temperature crystallization (3) heating - constant temperature sweating, (4) product refining.
[0053] (1) Preparation
[0054] Prepare a number of stainless steel plates, each stainless steel plate has an external dimension of 0.98 m × 0.98 m × 0.02 m, and drill through holes of φ0.0015 m evenly distributed on the stainless steel plate (the hole is drilled at 0.01m from the edge, and the center of the hole Spacing 0.04m) (the pressure generated by each stainless steel plate is about 1.5kPa), spare.
[0055] Connect the sealing system of the sweating dish (same as Comparative Example 1) with the pressurized buffer tank and the compressor; install the decompression buffer tank at the lower part of the sweating dish and connect the vacuum pump; connect the jacket of the sweating dish and the movable coil with the circulation system , u...
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Abstract
The invention discloses a method for sweating and producing microcrystalline wax with high drop melting point. The method is based on a common sweating process, in a cooling process, a high temperature constant temperature phase is added at a proper temperature in a cooling process; in a sweating process, air-flow passes through a wax layer in order to carry liquid state components; a solid weight is placed on the wax layer for exerting an intensity of pressure for the wax layer, in order to enhance separating effects of solid state components and liquid state components as well as accelerate separating speed; the microcrystalline wax product with high drop melting point can be produced by using the sweating and deoiling solvent-free method. 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.
Description
technical field [0001] The invention belongs to the technical field of petroleum wax production, in particular to a method for sweating and producing high-drop melting point microcrystalline wax. Background technique [0002] Petroleum wax is a general term for various wax products obtained from waxy distillates after crude oil is refined and processed, including liquid paraffin, soap wax, paraffin wax and microcrystalline wax. The drop melting point of the microcrystalline wax products specified in the national standard is 67 ° C ~ 92 ° C, generally determined by C 30 ~C 60 It is composed of isoparaffins and a small amount of normal paraffins and naphthenes, and has a finer needle crystal structure than paraffin in solid state. [0003] Microcrystalline wax is produced by deasphalting vacuum residue oil with propane and other solvents, followed by dewaxing, deoiling, refining and molding. [0004] Dewaxing is a process in which lubricating oil fractions are used as raw m...
Claims
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IPC IPC(8): C10G73/42
CPCC10G73/42
Inventor 孙剑锋姚春雷王立言张志银陈琳张晓晖
Owner CHINA PETROLEUM & CHEM CORP