The invention relates to a
gas pipeline drag
reducer used in gas and particularly
natural gas conveying pipeline drag reduction and a preparation method thereof, relating to a macromolecular compound composition and the pipeline
system technical field. The
gas pipeline drag
reducer is characterized in that: the drag
reducer is synthesized by long-chain acid and
enamine according to a
molar ratio of between 1:1 and 2.2:1. The preparation method comprises the following steps that: the
long chain acid in proportional quantity is added in a reaction container; a heater is started so as to carry out heating while stirring; when temperature reaches to 100 DEG C, the
long chain acid is melted, and the
enamine in proportional quantity is added at the same time;
nitrogen is fed in to carry out protection, and the mixture is preheated to between 120 and 140 DEG C; after preheating is finished, programmed heating is carried out till temperature is increased to between 210 and 220 DEG C; a stirrer is removed and a
vacuum pump is connected to carry out evacuation for 2 to 4 hours; when reaction is finished, brown
solid crude product can be obtained after
cooling down. The
gas pipeline drag reducer has obvious drag reduction effect on gas pipelines, direct source of raw materials, simple operation, moderate
reaction conditions, relatively simple process and low requirements on equipment, and is easy to realize large-scale industrialized production.